sr: chronovu-la8: Split code into api.c and driver.c.
We should generally use api.c for API related functions and put the other functions (mostly hardware-specific low-level code) into other C file(s) for better readability.
This commit is contained in:
Uwe Hermann
parent
9956f2851f
commit
b908f067f2
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@ -24,7 +24,9 @@ if LA_CHRONOVU_LA8
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noinst_LTLIBRARIES = libsigrokhwchronovula8.la
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libsigrokhwchronovula8_la_SOURCES = \
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chronovu-la8.c
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api.c \
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driver.c \
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driver.h
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libsigrokhwchronovula8_la_CFLAGS = \
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-I$(top_srcdir)
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@ -0,0 +1,538 @@
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/*
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* This file is part of the sigrok project.
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*
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* Copyright (C) 2011-2012 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <ftdi.h>
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#include <glib.h>
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#include <string.h>
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#include "sigrok.h"
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#include "sigrok-internal.h"
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#include "driver.h"
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static GSList *dev_insts = NULL;
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/* Function prototypes. */
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static int hw_dev_acquisition_stop(int dev_index, void *cb_data);
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static int hw_init(const char *devinfo)
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{
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int ret;
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struct sr_dev_inst *sdi;
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struct context *ctx;
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/* Avoid compiler errors. */
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(void)devinfo;
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/* Allocate memory for our private driver context. */
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if (!(ctx = g_try_malloc(sizeof(struct context)))) {
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sr_err("la8: %s: struct context malloc failed", __func__);
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goto err_free_nothing;
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}
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/* Set some sane defaults. */
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ctx->ftdic = NULL;
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ctx->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
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ctx->limit_msec = 0;
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ctx->limit_samples = 0;
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ctx->session_dev_id = NULL;
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memset(ctx->mangled_buf, 0, BS);
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ctx->final_buf = NULL;
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ctx->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
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ctx->trigger_mask = 0x00; /* All probes are "don't care". */
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ctx->trigger_timeout = 10; /* Default to 10s trigger timeout. */
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ctx->trigger_found = 0;
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ctx->done = 0;
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ctx->block_counter = 0;
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ctx->divcount = 0; /* 10ns sample period == 100MHz samplerate */
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/* Allocate memory where we'll store the de-mangled data. */
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if (!(ctx->final_buf = g_try_malloc(SDRAM_SIZE))) {
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sr_err("la8: %s: final_buf malloc failed", __func__);
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goto err_free_ctx;
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}
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/* Allocate memory for the FTDI context (ftdic) and initialize it. */
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if (!(ctx->ftdic = ftdi_new())) {
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sr_err("la8: %s: ftdi_new failed", __func__);
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goto err_free_final_buf;
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}
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/* Check for the device and temporarily open it. */
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if ((ret = ftdi_usb_open_desc(ctx->ftdic, USB_VENDOR_ID,
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USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
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(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
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goto err_free_ftdic;
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}
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sr_dbg("la8: Found LA8 device (%04x:%04x).", USB_VENDOR_ID,
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USB_PRODUCT_ID);
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/* Register the device with libsigrok. */
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sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
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USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
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if (!sdi) {
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sr_err("la8: %s: sr_dev_inst_new failed", __func__);
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goto err_close_ftdic;
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}
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sdi->priv = ctx;
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dev_insts = g_slist_append(dev_insts, sdi);
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sr_spew("la8: Device init successful.");
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/* Close device. We'll reopen it again when we need it. */
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(void) la8_close(ctx); /* Log, but ignore errors. */
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return 1;
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err_close_ftdic:
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(void) la8_close(ctx); /* Log, but ignore errors. */
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err_free_ftdic:
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free(ctx->ftdic); /* NOT g_free()! */
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err_free_final_buf:
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g_free(ctx->final_buf);
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err_free_ctx:
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g_free(ctx);
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err_free_nothing:
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return 0;
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}
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static int hw_dev_open(int dev_index)
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{
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int ret;
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struct sr_dev_inst *sdi;
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struct context *ctx;
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if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
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sr_err("la8: %s: sdi was NULL", __func__);
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return SR_ERR_BUG;
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}
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if (!(ctx = sdi->priv)) {
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sr_err("la8: %s: sdi->priv was NULL", __func__);
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return SR_ERR_BUG;
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}
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sr_dbg("la8: Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
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USB_PRODUCT_ID);
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/* Open the device. */
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if ((ret = ftdi_usb_open_desc(ctx->ftdic, USB_VENDOR_ID,
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USB_PRODUCT_ID, USB_DESCRIPTION, NULL)) < 0) {
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sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s",
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__func__, ret, ftdi_get_error_string(ctx->ftdic));
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(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
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return SR_ERR;
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}
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sr_dbg("la8: Device opened successfully.");
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/* Purge RX/TX buffers in the FTDI chip. */
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if ((ret = ftdi_usb_purge_buffers(ctx->ftdic)) < 0) {
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sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
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__func__, ret, ftdi_get_error_string(ctx->ftdic));
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(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
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goto err_dev_open_close_ftdic;
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}
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sr_dbg("la8: FTDI buffers purged successfully.");
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/* Enable flow control in the FTDI chip. */
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if ((ret = ftdi_setflowctrl(ctx->ftdic, SIO_RTS_CTS_HS)) < 0) {
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sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s",
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__func__, ret, ftdi_get_error_string(ctx->ftdic));
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(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
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goto err_dev_open_close_ftdic;
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}
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sr_dbg("la8: FTDI flow control enabled successfully.");
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/* Wait 100ms. */
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g_usleep(100 * 1000);
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sdi->status = SR_ST_ACTIVE;
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return SR_OK;
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err_dev_open_close_ftdic:
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(void) la8_close(ctx); /* Log, but ignore errors. */
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return SR_ERR;
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}
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static int hw_dev_close(int dev_index)
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{
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struct sr_dev_inst *sdi;
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struct context *ctx;
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if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
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sr_err("la8: %s: sdi was NULL", __func__);
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return SR_ERR_BUG;
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}
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if (!(ctx = sdi->priv)) {
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sr_err("la8: %s: sdi->priv was NULL", __func__);
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return SR_ERR_BUG;
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}
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sr_dbg("la8: Closing device.");
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if (sdi->status == SR_ST_ACTIVE) {
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sr_dbg("la8: Status ACTIVE, closing device.");
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/* TODO: Really ignore errors here, or return SR_ERR? */
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(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
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} else {
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sr_spew("la8: Status not ACTIVE, nothing to do.");
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}
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sdi->status = SR_ST_INACTIVE;
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sr_dbg("la8: Freeing sample buffer.");
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g_free(ctx->final_buf);
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return SR_OK;
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}
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static int hw_cleanup(void)
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{
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GSList *l;
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struct sr_dev_inst *sdi;
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int ret = SR_OK;
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/* Properly close all devices. */
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for (l = dev_insts; l; l = l->next) {
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if (!(sdi = l->data)) {
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/* Log error, but continue cleaning up the rest. */
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sr_err("la8: %s: sdi was NULL, continuing", __func__);
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ret = SR_ERR_BUG;
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continue;
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}
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sr_dev_inst_free(sdi); /* Returns void. */
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}
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g_slist_free(dev_insts); /* Returns void. */
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dev_insts = NULL;
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return ret;
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}
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static const void *hw_dev_info_get(int dev_index, int dev_info_id)
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{
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struct sr_dev_inst *sdi;
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struct context *ctx;
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const void *info;
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if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
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sr_err("la8: %s: sdi was NULL", __func__);
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return NULL;
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}
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if (!(ctx = sdi->priv)) {
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sr_err("la8: %s: sdi->priv was NULL", __func__);
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return NULL;
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}
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sr_spew("la8: %s: dev_index %d, dev_info_id %d.", __func__,
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dev_index, dev_info_id);
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switch (dev_info_id) {
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case SR_DI_INST:
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info = sdi;
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sr_spew("la8: %s: Returning sdi.", __func__);
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break;
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case SR_DI_NUM_PROBES:
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info = GINT_TO_POINTER(NUM_PROBES);
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sr_spew("la8: %s: Returning number of probes: %d.", __func__,
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NUM_PROBES);
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break;
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case SR_DI_PROBE_NAMES:
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info = probe_names;
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sr_spew("la8: %s: Returning probenames.", __func__);
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break;
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case SR_DI_SAMPLERATES:
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fill_supported_samplerates_if_needed();
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info = &samplerates;
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sr_spew("la8: %s: Returning samplerates.", __func__);
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break;
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case SR_DI_TRIGGER_TYPES:
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info = (char *)TRIGGER_TYPES;
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sr_spew("la8: %s: Returning trigger types: %s.", __func__,
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TRIGGER_TYPES);
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break;
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case SR_DI_CUR_SAMPLERATE:
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info = &ctx->cur_samplerate;
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sr_spew("la8: %s: Returning samplerate: %" PRIu64 "Hz.",
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__func__, ctx->cur_samplerate);
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break;
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default:
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/* Unknown device info ID, return NULL. */
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sr_err("la8: %s: Unknown device info ID", __func__);
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info = NULL;
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break;
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}
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return info;
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}
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static int hw_dev_status_get(int dev_index)
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{
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struct sr_dev_inst *sdi;
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if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
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sr_err("la8: %s: sdi was NULL, device not found", __func__);
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return SR_ST_NOT_FOUND;
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}
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sr_dbg("la8: Returning status: %d.", sdi->status);
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return sdi->status;
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}
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static const int *hw_hwcap_get_all(void)
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{
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sr_spew("la8: Returning list of device capabilities.");
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return hwcaps;
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}
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static int hw_dev_config_set(int dev_index, int hwcap, const void *value)
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{
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struct sr_dev_inst *sdi;
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struct context *ctx;
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if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
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sr_err("la8: %s: sdi was NULL", __func__);
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return SR_ERR_BUG;
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}
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if (!(ctx = sdi->priv)) {
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sr_err("la8: %s: sdi->priv was NULL", __func__);
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return SR_ERR_BUG;
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}
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sr_spew("la8: %s: dev_index %d, hwcap %d", __func__, dev_index, hwcap);
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switch (hwcap) {
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case SR_HWCAP_SAMPLERATE:
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if (set_samplerate(sdi, *(const uint64_t *)value) == SR_ERR) {
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sr_err("la8: %s: setting samplerate failed.", __func__);
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return SR_ERR;
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}
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sr_dbg("la8: SAMPLERATE = %" PRIu64, ctx->cur_samplerate);
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break;
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case SR_HWCAP_PROBECONFIG:
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if (configure_probes(ctx, (const GSList *)value) != SR_OK) {
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sr_err("la8: %s: probe config failed.", __func__);
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return SR_ERR;
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}
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break;
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case SR_HWCAP_LIMIT_MSEC:
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if (*(const uint64_t *)value == 0) {
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sr_err("la8: %s: LIMIT_MSEC can't be 0.", __func__);
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return SR_ERR;
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}
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ctx->limit_msec = *(const uint64_t *)value;
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sr_dbg("la8: LIMIT_MSEC = %" PRIu64, ctx->limit_msec);
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break;
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case SR_HWCAP_LIMIT_SAMPLES:
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if (*(const uint64_t *)value < MIN_NUM_SAMPLES) {
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sr_err("la8: %s: LIMIT_SAMPLES too small.", __func__);
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return SR_ERR;
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}
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ctx->limit_samples = *(const uint64_t *)value;
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sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, ctx->limit_samples);
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break;
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default:
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/* Unknown capability, return SR_ERR. */
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sr_err("la8: %s: Unknown capability.", __func__);
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return SR_ERR;
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break;
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}
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return SR_OK;
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}
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static int receive_data(int fd, int revents, void *cb_data)
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{
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int i, ret;
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struct sr_dev_inst *sdi;
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struct context *ctx;
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/* Avoid compiler errors. */
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(void)fd;
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(void)revents;
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if (!(sdi = cb_data)) {
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sr_err("la8: %s: cb_data was NULL", __func__);
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return FALSE;
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}
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if (!(ctx = sdi->priv)) {
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sr_err("la8: %s: sdi->priv was NULL", __func__);
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return FALSE;
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}
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if (!ctx->ftdic) {
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sr_err("la8: %s: ctx->ftdic was NULL", __func__);
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return FALSE;
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}
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/* Get one block of data. */
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if ((ret = la8_read_block(ctx)) < 0) {
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sr_err("la8: %s: la8_read_block error: %d", __func__, ret);
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hw_dev_acquisition_stop(sdi->index, sdi);
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return FALSE;
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}
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/* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
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if (ctx->block_counter != (NUM_BLOCKS - 1)) {
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ctx->block_counter++;
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return TRUE;
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}
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sr_dbg("la8: Sampling finished, sending data to session bus now.");
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/* All data was received and demangled, send it to the session bus. */
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for (i = 0; i < NUM_BLOCKS; i++)
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send_block_to_session_bus(ctx, i);
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hw_dev_acquisition_stop(sdi->index, sdi);
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// return FALSE; /* FIXME? */
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return TRUE;
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}
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static int hw_dev_acquisition_start(int dev_index, void *cb_data)
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{
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struct sr_dev_inst *sdi;
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struct context *ctx;
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struct sr_datafeed_packet packet;
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struct sr_datafeed_header header;
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struct sr_datafeed_meta_logic meta;
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uint8_t buf[4];
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int bytes_written;
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if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
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sr_err("la8: %s: sdi was NULL", __func__);
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return SR_ERR_BUG;
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}
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if (!(ctx = sdi->priv)) {
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sr_err("la8: %s: sdi->priv was NULL", __func__);
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return SR_ERR_BUG;
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}
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if (!ctx->ftdic) {
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sr_err("la8: %s: ctx->ftdic was NULL", __func__);
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return SR_ERR_BUG;
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}
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ctx->divcount = samplerate_to_divcount(ctx->cur_samplerate);
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if (ctx->divcount == 0xff) {
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sr_err("la8: %s: invalid divcount/samplerate", __func__);
|
||||
return SR_ERR;
|
||||
}
|
||||
|
||||
sr_dbg("la8: Starting acquisition.");
|
||||
|
||||
/* Fill acquisition parameters into buf[]. */
|
||||
buf[0] = ctx->divcount;
|
||||
buf[1] = 0xff; /* This byte must always be 0xff. */
|
||||
buf[2] = ctx->trigger_pattern;
|
||||
buf[3] = ctx->trigger_mask;
|
||||
|
||||
/* Start acquisition. */
|
||||
bytes_written = la8_write(ctx, buf, 4);
|
||||
|
||||
if (bytes_written < 0) {
|
||||
sr_err("la8: Acquisition failed to start.");
|
||||
return SR_ERR;
|
||||
} else if (bytes_written != 4) {
|
||||
sr_err("la8: Acquisition failed to start.");
|
||||
return SR_ERR; /* TODO: Other error and return code? */
|
||||
}
|
||||
|
||||
sr_dbg("la8: Acquisition started successfully.");
|
||||
|
||||
ctx->session_dev_id = cb_data;
|
||||
|
||||
/* Send header packet to the session bus. */
|
||||
sr_dbg("la8: Sending SR_DF_HEADER.");
|
||||
packet.type = SR_DF_HEADER;
|
||||
packet.payload = &header;
|
||||
header.feed_version = 1;
|
||||
gettimeofday(&header.starttime, NULL);
|
||||
sr_session_send(ctx->session_dev_id, &packet);
|
||||
|
||||
/* Send metadata about the SR_DF_LOGIC packets to come. */
|
||||
packet.type = SR_DF_META_LOGIC;
|
||||
packet.payload = &meta;
|
||||
meta.samplerate = ctx->cur_samplerate;
|
||||
meta.num_probes = NUM_PROBES;
|
||||
sr_session_send(ctx->session_dev_id, &packet);
|
||||
|
||||
/* Time when we should be done (for detecting trigger timeouts). */
|
||||
ctx->done = (ctx->divcount + 1) * 0.08388608 + time(NULL)
|
||||
+ ctx->trigger_timeout;
|
||||
ctx->block_counter = 0;
|
||||
ctx->trigger_found = 0;
|
||||
|
||||
/* Hook up a dummy handler to receive data from the LA8. */
|
||||
sr_source_add(-1, G_IO_IN, 0, receive_data, sdi);
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
|
||||
{
|
||||
struct sr_dev_inst *sdi;
|
||||
struct context *ctx;
|
||||
struct sr_datafeed_packet packet;
|
||||
|
||||
sr_dbg("la8: Stopping acquisition.");
|
||||
|
||||
if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
|
||||
sr_err("la8: %s: sdi was NULL", __func__);
|
||||
return SR_ERR_BUG;
|
||||
}
|
||||
|
||||
if (!(ctx = sdi->priv)) {
|
||||
sr_err("la8: %s: sdi->priv was NULL", __func__);
|
||||
return SR_ERR_BUG;
|
||||
}
|
||||
|
||||
/* Send end packet to the session bus. */
|
||||
sr_dbg("la8: Sending SR_DF_END.");
|
||||
packet.type = SR_DF_END;
|
||||
sr_session_send(cb_data, &packet);
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
|
||||
.name = "chronovu-la8",
|
||||
.longname = "ChronoVu LA8",
|
||||
.api_version = 1,
|
||||
.init = hw_init,
|
||||
.cleanup = hw_cleanup,
|
||||
.dev_open = hw_dev_open,
|
||||
.dev_close = hw_dev_close,
|
||||
.dev_info_get = hw_dev_info_get,
|
||||
.dev_status_get = hw_dev_status_get,
|
||||
.hwcap_get_all = hw_hwcap_get_all,
|
||||
.dev_config_set = hw_dev_config_set,
|
||||
.dev_acquisition_start = hw_dev_acquisition_start,
|
||||
.dev_acquisition_stop = hw_dev_acquisition_stop,
|
||||
};
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,546 @@
|
|||
/*
|
||||
* This file is part of the sigrok project.
|
||||
*
|
||||
* Copyright (C) 2011-2012 Uwe Hermann <uwe@hermann-uwe.de>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <ftdi.h>
|
||||
#include <glib.h>
|
||||
#include "sigrok.h"
|
||||
#include "sigrok-internal.h"
|
||||
#include "driver.h"
|
||||
|
||||
/* Probes are numbered 0-7. */
|
||||
SR_PRIV const char *probe_names[NUM_PROBES + 1] = {
|
||||
"0",
|
||||
"1",
|
||||
"2",
|
||||
"3",
|
||||
"4",
|
||||
"5",
|
||||
"6",
|
||||
"7",
|
||||
NULL,
|
||||
};
|
||||
|
||||
/* This will be initialized via hw_dev_info_get()/SR_DI_SAMPLERATES. */
|
||||
SR_PRIV uint64_t supported_samplerates[255 + 1] = { 0 };
|
||||
|
||||
/*
|
||||
* Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
|
||||
* Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
|
||||
*/
|
||||
const struct sr_samplerates samplerates = {
|
||||
.low = 0,
|
||||
.high = 0,
|
||||
.step = 0,
|
||||
.list = supported_samplerates,
|
||||
};
|
||||
|
||||
/* Note: Continuous sampling is not supported by the hardware. */
|
||||
SR_PRIV const int hwcaps[] = {
|
||||
SR_HWCAP_LOGIC_ANALYZER,
|
||||
SR_HWCAP_SAMPLERATE,
|
||||
SR_HWCAP_LIMIT_MSEC, /* TODO: Not yet implemented. */
|
||||
SR_HWCAP_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
|
||||
0,
|
||||
};
|
||||
|
||||
SR_PRIV void fill_supported_samplerates_if_needed(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* Do nothing if supported_samplerates[] is already filled. */
|
||||
if (supported_samplerates[0] != 0)
|
||||
return;
|
||||
|
||||
/* Fill supported_samplerates[] with the proper values. */
|
||||
for (i = 0; i < 255; i++)
|
||||
supported_samplerates[254 - i] = SR_MHZ(100) / (i + 1);
|
||||
supported_samplerates[255] = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if the given samplerate is supported by the LA8 hardware.
|
||||
*
|
||||
* @param samplerate The samplerate (in Hz) to check.
|
||||
* @return 1 if the samplerate is supported/valid, 0 otherwise.
|
||||
*/
|
||||
SR_PRIV int is_valid_samplerate(uint64_t samplerate)
|
||||
{
|
||||
int i;
|
||||
|
||||
fill_supported_samplerates_if_needed();
|
||||
|
||||
for (i = 0; i < 255; i++) {
|
||||
if (supported_samplerates[i] == samplerate)
|
||||
return 1;
|
||||
}
|
||||
|
||||
sr_err("la8: %s: invalid samplerate (%" PRIu64 "Hz)",
|
||||
__func__, samplerate);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
|
||||
*
|
||||
* LA8 hardware: sample period = (divcount + 1) * 10ns.
|
||||
* Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
|
||||
* Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
|
||||
*
|
||||
* @param samplerate The samplerate in Hz.
|
||||
* @return The divcount value as needed by the hardware, or 0xff upon errors.
|
||||
*/
|
||||
SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate)
|
||||
{
|
||||
if (samplerate == 0) {
|
||||
sr_err("la8: %s: samplerate was 0", __func__);
|
||||
return 0xff;
|
||||
}
|
||||
|
||||
if (!is_valid_samplerate(samplerate)) {
|
||||
sr_err("la8: %s: can't get divcount, samplerate invalid",
|
||||
__func__);
|
||||
return 0xff;
|
||||
}
|
||||
|
||||
return (SR_MHZ(100) / samplerate) - 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Write data of a certain length to the LA8's FTDI device.
|
||||
*
|
||||
* @param ctx The struct containing private per-device-instance data. Must not
|
||||
* be NULL. ctx->ftdic must not be NULL either.
|
||||
* @param buf The buffer containing the data to write. Must not be NULL.
|
||||
* @param size The number of bytes to write. Must be >= 0.
|
||||
* @return The number of bytes written, or a negative value upon errors.
|
||||
*/
|
||||
SR_PRIV int la8_write(struct context *ctx, uint8_t *buf, int size)
|
||||
{
|
||||
int bytes_written;
|
||||
|
||||
/* Note: Caller checked that ctx and ctx->ftdic != NULL. */
|
||||
|
||||
if (!buf) {
|
||||
sr_err("la8: %s: buf was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
if (size < 0) {
|
||||
sr_err("la8: %s: size was < 0", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
bytes_written = ftdi_write_data(ctx->ftdic, buf, size);
|
||||
|
||||
if (bytes_written < 0) {
|
||||
sr_err("la8: %s: ftdi_write_data: (%d) %s", __func__,
|
||||
bytes_written, ftdi_get_error_string(ctx->ftdic));
|
||||
(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
|
||||
} else if (bytes_written != size) {
|
||||
sr_err("la8: %s: bytes to write: %d, bytes written: %d",
|
||||
__func__, size, bytes_written);
|
||||
(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
|
||||
}
|
||||
|
||||
return bytes_written;
|
||||
}
|
||||
|
||||
/**
|
||||
* Read a certain amount of bytes from the LA8's FTDI device.
|
||||
*
|
||||
* @param ctx The struct containing private per-device-instance data. Must not
|
||||
* be NULL. ctx->ftdic must not be NULL either.
|
||||
* @param buf The buffer where the received data will be stored. Must not
|
||||
* be NULL.
|
||||
* @param size The number of bytes to read. Must be >= 1.
|
||||
* @return The number of bytes read, or a negative value upon errors.
|
||||
*/
|
||||
SR_PRIV int la8_read(struct context *ctx, uint8_t *buf, int size)
|
||||
{
|
||||
int bytes_read;
|
||||
|
||||
/* Note: Caller checked that ctx and ctx->ftdic != NULL. */
|
||||
|
||||
if (!buf) {
|
||||
sr_err("la8: %s: buf was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
if (size <= 0) {
|
||||
sr_err("la8: %s: size was <= 0", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
bytes_read = ftdi_read_data(ctx->ftdic, buf, size);
|
||||
|
||||
if (bytes_read < 0) {
|
||||
sr_err("la8: %s: ftdi_read_data: (%d) %s", __func__,
|
||||
bytes_read, ftdi_get_error_string(ctx->ftdic));
|
||||
} else if (bytes_read != size) {
|
||||
// sr_err("la8: %s: bytes to read: %d, bytes read: %d",
|
||||
// __func__, size, bytes_read);
|
||||
}
|
||||
|
||||
return bytes_read;
|
||||
}
|
||||
|
||||
SR_PRIV int la8_close(struct context *ctx)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (!ctx) {
|
||||
sr_err("la8: %s: ctx was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
if (!ctx->ftdic) {
|
||||
sr_err("la8: %s: ctx->ftdic was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
if ((ret = ftdi_usb_close(ctx->ftdic)) < 0) {
|
||||
sr_err("la8: %s: ftdi_usb_close: (%d) %s",
|
||||
__func__, ret, ftdi_get_error_string(ctx->ftdic));
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* Close the ChronoVu LA8 USB port and reset the LA8 sequencer logic.
|
||||
*
|
||||
* @param ctx The struct containing private per-device-instance data.
|
||||
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments.
|
||||
*/
|
||||
SR_PRIV int la8_close_usb_reset_sequencer(struct context *ctx)
|
||||
{
|
||||
/* Magic sequence of bytes for resetting the LA8 sequencer logic. */
|
||||
uint8_t buf[8] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01};
|
||||
int ret;
|
||||
|
||||
if (!ctx) {
|
||||
sr_err("la8: %s: ctx was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
if (!ctx->ftdic) {
|
||||
sr_err("la8: %s: ctx->ftdic was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
if (ctx->ftdic->usb_dev) {
|
||||
/* Reset the LA8 sequencer logic, then wait 100ms. */
|
||||
sr_dbg("la8: Resetting sequencer logic.");
|
||||
(void) la8_write(ctx, buf, 8); /* Ignore errors. */
|
||||
g_usleep(100 * 1000);
|
||||
|
||||
/* Purge FTDI buffers, then reset and close the FTDI device. */
|
||||
sr_dbg("la8: Purging buffers, resetting+closing FTDI device.");
|
||||
|
||||
/* Log errors, but ignore them (i.e., don't abort). */
|
||||
if ((ret = ftdi_usb_purge_buffers(ctx->ftdic)) < 0)
|
||||
sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
|
||||
__func__, ret, ftdi_get_error_string(ctx->ftdic));
|
||||
if ((ret = ftdi_usb_reset(ctx->ftdic)) < 0)
|
||||
sr_err("la8: %s: ftdi_usb_reset: (%d) %s", __func__,
|
||||
ret, ftdi_get_error_string(ctx->ftdic));
|
||||
if ((ret = ftdi_usb_close(ctx->ftdic)) < 0)
|
||||
sr_err("la8: %s: ftdi_usb_close: (%d) %s", __func__,
|
||||
ret, ftdi_get_error_string(ctx->ftdic));
|
||||
}
|
||||
|
||||
/* Close USB device, deinitialize and free the FTDI context. */
|
||||
ftdi_free(ctx->ftdic); /* Returns void. */
|
||||
ctx->ftdic = NULL;
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reset the ChronoVu LA8.
|
||||
*
|
||||
* The LA8 must be reset after a failed read/write operation or upon timeouts.
|
||||
*
|
||||
* @param ctx The struct containing private per-device-instance data.
|
||||
* @return SR_OK upon success, SR_ERR upon failure.
|
||||
*/
|
||||
SR_PRIV int la8_reset(struct context *ctx)
|
||||
{
|
||||
uint8_t buf[BS];
|
||||
time_t done, now;
|
||||
int bytes_read;
|
||||
|
||||
if (!ctx) {
|
||||
sr_err("la8: %s: ctx was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
if (!ctx->ftdic) {
|
||||
sr_err("la8: %s: ctx->ftdic was NULL", __func__);
|
||||
return SR_ERR_ARG;
|
||||
}
|
||||
|
||||
sr_dbg("la8: Resetting the device.");
|
||||
|
||||
/*
|
||||
* Purge pending read data from the FTDI hardware FIFO until
|
||||
* no more data is left, or a timeout occurs (after 20s).
|
||||
*/
|
||||
done = 20 + time(NULL);
|
||||
do {
|
||||
/* TODO: Ignore errors? Check for < 0 at least! */
|
||||
bytes_read = la8_read(ctx, (uint8_t *)&buf, BS);
|
||||
now = time(NULL);
|
||||
} while ((done > now) && (bytes_read > 0));
|
||||
|
||||
/* Reset the LA8 sequencer logic and close the USB port. */
|
||||
(void) la8_close_usb_reset_sequencer(ctx); /* Ignore errors. */
|
||||
|
||||
sr_dbg("la8: Device reset finished.");
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
SR_PRIV int configure_probes(struct context *ctx, const GSList *probes)
|
||||
{
|
||||
const struct sr_probe *probe;
|
||||
const GSList *l;
|
||||
uint8_t probe_bit;
|
||||
char *tc;
|
||||
|
||||
/* Note: Caller checked that ctx != NULL. */
|
||||
|
||||
ctx->trigger_pattern = 0;
|
||||
ctx->trigger_mask = 0; /* Default to "don't care" for all probes. */
|
||||
|
||||
for (l = probes; l; l = l->next) {
|
||||
probe = (struct sr_probe *)l->data;
|
||||
|
||||
if (!probe) {
|
||||
sr_err("la8: %s: probe was NULL", __func__);
|
||||
return SR_ERR;
|
||||
}
|
||||
|
||||
/* Skip disabled probes. */
|
||||
if (!probe->enabled)
|
||||
continue;
|
||||
|
||||
/* Skip (enabled) probes with no configured trigger. */
|
||||
if (!probe->trigger)
|
||||
continue;
|
||||
|
||||
/* Note: Must only be run if probe->trigger != NULL. */
|
||||
if (probe->index < 0 || probe->index > 7) {
|
||||
sr_err("la8: %s: invalid probe index %d, must be "
|
||||
"between 0 and 7", __func__, probe->index);
|
||||
return SR_ERR;
|
||||
}
|
||||
|
||||
probe_bit = (1 << (probe->index - 1));
|
||||
|
||||
/* Configure the probe's trigger mask and trigger pattern. */
|
||||
for (tc = probe->trigger; tc && *tc; tc++) {
|
||||
ctx->trigger_mask |= probe_bit;
|
||||
|
||||
/* Sanity check, LA8 only supports low/high trigger. */
|
||||
if (*tc != '0' && *tc != '1') {
|
||||
sr_err("la8: %s: invalid trigger '%c', only "
|
||||
"'0'/'1' supported", __func__, *tc);
|
||||
return SR_ERR;
|
||||
}
|
||||
|
||||
if (*tc == '1')
|
||||
ctx->trigger_pattern |= probe_bit;
|
||||
}
|
||||
}
|
||||
|
||||
sr_dbg("la8: trigger_mask = 0x%x, trigger_pattern = 0x%x",
|
||||
ctx->trigger_mask, ctx->trigger_pattern);
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
SR_PRIV int set_samplerate(struct sr_dev_inst *sdi, uint64_t samplerate)
|
||||
{
|
||||
struct context *ctx;
|
||||
|
||||
/* Note: Caller checked that sdi and sdi->priv != NULL. */
|
||||
|
||||
ctx = sdi->priv;
|
||||
|
||||
sr_spew("la8: Trying to set samplerate to %" PRIu64 "Hz.", samplerate);
|
||||
|
||||
fill_supported_samplerates_if_needed();
|
||||
|
||||
/* Check if this is a samplerate supported by the hardware. */
|
||||
if (!is_valid_samplerate(samplerate))
|
||||
return SR_ERR;
|
||||
|
||||
/* Set the new samplerate. */
|
||||
ctx->cur_samplerate = samplerate;
|
||||
|
||||
sr_dbg("la8: Samplerate set to %" PRIu64 "Hz.", ctx->cur_samplerate);
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get a block of data from the LA8.
|
||||
*
|
||||
* @param ctx The struct containing private per-device-instance data. Must not
|
||||
* be NULL. ctx->ftdic must not be NULL either.
|
||||
* @return SR_OK upon success, or SR_ERR upon errors.
|
||||
*/
|
||||
SR_PRIV int la8_read_block(struct context *ctx)
|
||||
{
|
||||
int i, byte_offset, m, mi, p, index, bytes_read;
|
||||
time_t now;
|
||||
|
||||
/* Note: Caller checked that ctx and ctx->ftdic != NULL. */
|
||||
|
||||
sr_spew("la8: Reading block %d.", ctx->block_counter);
|
||||
|
||||
bytes_read = la8_read(ctx, ctx->mangled_buf, BS);
|
||||
|
||||
/* If first block read got 0 bytes, retry until success or timeout. */
|
||||
if ((bytes_read == 0) && (ctx->block_counter == 0)) {
|
||||
do {
|
||||
sr_spew("la8: Reading block 0 (again).");
|
||||
bytes_read = la8_read(ctx, ctx->mangled_buf, BS);
|
||||
/* TODO: How to handle read errors here? */
|
||||
now = time(NULL);
|
||||
} while ((ctx->done > now) && (bytes_read == 0));
|
||||
}
|
||||
|
||||
/* Check if block read was successful or a timeout occured. */
|
||||
if (bytes_read != BS) {
|
||||
sr_err("la8: Trigger timed out. Bytes read: %d.", bytes_read);
|
||||
(void) la8_reset(ctx); /* Ignore errors. */
|
||||
return SR_ERR;
|
||||
}
|
||||
|
||||
/* De-mangle the data. */
|
||||
sr_spew("la8: Demangling block %d.", ctx->block_counter);
|
||||
byte_offset = ctx->block_counter * BS;
|
||||
m = byte_offset / (1024 * 1024);
|
||||
mi = m * (1024 * 1024);
|
||||
for (i = 0; i < BS; i++) {
|
||||
p = i & (1 << 0);
|
||||
index = m * 2 + (((byte_offset + i) - mi) / 2) * 16;
|
||||
index += (ctx->divcount == 0) ? p : (1 - p);
|
||||
ctx->final_buf[index] = ctx->mangled_buf[i];
|
||||
}
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
SR_PRIV void send_block_to_session_bus(struct context *ctx, int block)
|
||||
{
|
||||
int i;
|
||||
uint8_t sample, expected_sample;
|
||||
struct sr_datafeed_packet packet;
|
||||
struct sr_datafeed_logic logic;
|
||||
int trigger_point; /* Relative trigger point (in this block). */
|
||||
|
||||
/* Note: No sanity checks on ctx/block, caller is responsible. */
|
||||
|
||||
/* Check if we can find the trigger condition in this block. */
|
||||
trigger_point = -1;
|
||||
expected_sample = ctx->trigger_pattern & ctx->trigger_mask;
|
||||
for (i = 0; i < BS; i++) {
|
||||
/* Don't continue if the trigger was found previously. */
|
||||
if (ctx->trigger_found)
|
||||
break;
|
||||
|
||||
/*
|
||||
* Also, don't continue if triggers are "don't care", i.e. if
|
||||
* no trigger conditions were specified by the user. In that
|
||||
* case we don't want to send an SR_DF_TRIGGER packet at all.
|
||||
*/
|
||||
if (ctx->trigger_mask == 0x00)
|
||||
break;
|
||||
|
||||
sample = *(ctx->final_buf + (block * BS) + i);
|
||||
|
||||
if ((sample & ctx->trigger_mask) == expected_sample) {
|
||||
trigger_point = i;
|
||||
ctx->trigger_found = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* If no trigger was found, send one SR_DF_LOGIC packet. */
|
||||
if (trigger_point == -1) {
|
||||
/* Send an SR_DF_LOGIC packet to the session bus. */
|
||||
sr_spew("la8: sending SR_DF_LOGIC packet (%d bytes) for "
|
||||
"block %d", BS, block);
|
||||
packet.type = SR_DF_LOGIC;
|
||||
packet.payload = &logic;
|
||||
logic.length = BS;
|
||||
logic.unitsize = 1;
|
||||
logic.data = ctx->final_buf + (block * BS);
|
||||
sr_session_send(ctx->session_dev_id, &packet);
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* We found the trigger, so some special handling is needed. We have
|
||||
* to send an SR_DF_LOGIC packet with the samples before the trigger
|
||||
* (if any), then the SD_DF_TRIGGER packet itself, then another
|
||||
* SR_DF_LOGIC packet with the samples after the trigger (if any).
|
||||
*/
|
||||
|
||||
/* TODO: Send SR_DF_TRIGGER packet before or after the actual sample? */
|
||||
|
||||
/* If at least one sample is located before the trigger... */
|
||||
if (trigger_point > 0) {
|
||||
/* Send pre-trigger SR_DF_LOGIC packet to the session bus. */
|
||||
sr_spew("la8: sending pre-trigger SR_DF_LOGIC packet, "
|
||||
"start = %d, length = %d", block * BS, trigger_point);
|
||||
packet.type = SR_DF_LOGIC;
|
||||
packet.payload = &logic;
|
||||
logic.length = trigger_point;
|
||||
logic.unitsize = 1;
|
||||
logic.data = ctx->final_buf + (block * BS);
|
||||
sr_session_send(ctx->session_dev_id, &packet);
|
||||
}
|
||||
|
||||
/* Send the SR_DF_TRIGGER packet to the session bus. */
|
||||
sr_spew("la8: sending SR_DF_TRIGGER packet, sample = %d",
|
||||
(block * BS) + trigger_point);
|
||||
packet.type = SR_DF_TRIGGER;
|
||||
packet.payload = NULL;
|
||||
sr_session_send(ctx->session_dev_id, &packet);
|
||||
|
||||
/* If at least one sample is located after the trigger... */
|
||||
if (trigger_point < (BS - 1)) {
|
||||
/* Send post-trigger SR_DF_LOGIC packet to the session bus. */
|
||||
sr_spew("la8: sending post-trigger SR_DF_LOGIC packet, "
|
||||
"start = %d, length = %d",
|
||||
(block * BS) + trigger_point, BS - trigger_point);
|
||||
packet.type = SR_DF_LOGIC;
|
||||
packet.payload = &logic;
|
||||
logic.length = BS - trigger_point;
|
||||
logic.unitsize = 1;
|
||||
logic.data = ctx->final_buf + (block * BS) + trigger_point;
|
||||
sr_session_send(ctx->session_dev_id, &packet);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,121 @@
|
|||
/*
|
||||
* This file is part of the sigrok project.
|
||||
*
|
||||
* Copyright (C) 2011-2012 Uwe Hermann <uwe@hermann-uwe.de>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#ifndef LIBSIGROK_HARDWARE_CHRONOVU_LA8_DRIVER_H
|
||||
#define LIBSIGROK_HARDWARE_CHRONOVU_LA8_DRIVER_H
|
||||
|
||||
#include <glib.h>
|
||||
#include <ftdi.h>
|
||||
#include <stdint.h>
|
||||
#include "sigrok.h"
|
||||
#include "sigrok-internal.h"
|
||||
|
||||
#define USB_VENDOR_ID 0x0403
|
||||
#define USB_PRODUCT_ID 0x6001
|
||||
#define USB_DESCRIPTION "ChronoVu LA8"
|
||||
#define USB_VENDOR_NAME "ChronoVu"
|
||||
#define USB_MODEL_NAME "LA8"
|
||||
#define USB_MODEL_VERSION ""
|
||||
|
||||
#define NUM_PROBES 8
|
||||
#define TRIGGER_TYPES "01"
|
||||
#define SDRAM_SIZE (8 * 1024 * 1024)
|
||||
#define MIN_NUM_SAMPLES 1
|
||||
|
||||
#define BS 4096 /* Block size */
|
||||
#define NUM_BLOCKS 2048 /* Number of blocks */
|
||||
|
||||
/* Private, per-device-instance driver context. */
|
||||
struct context {
|
||||
/** FTDI device context (used by libftdi). */
|
||||
struct ftdi_context *ftdic;
|
||||
|
||||
/** The currently configured samplerate of the device. */
|
||||
uint64_t cur_samplerate;
|
||||
|
||||
/** The current sampling limit (in ms). */
|
||||
uint64_t limit_msec;
|
||||
|
||||
/** The current sampling limit (in number of samples). */
|
||||
uint64_t limit_samples;
|
||||
|
||||
/** TODO */
|
||||
void *session_dev_id;
|
||||
|
||||
/**
|
||||
* A buffer containing some (mangled) samples from the device.
|
||||
* Format: Pretty mangled-up (due to hardware reasons), see code.
|
||||
*/
|
||||
uint8_t mangled_buf[BS];
|
||||
|
||||
/**
|
||||
* An 8MB buffer where we'll store the de-mangled samples.
|
||||
* Format: Each sample is 1 byte, MSB is channel 7, LSB is channel 0.
|
||||
*/
|
||||
uint8_t *final_buf;
|
||||
|
||||
/**
|
||||
* Trigger pattern (MSB = channel 7, LSB = channel 0).
|
||||
* A 1 bit matches a high signal, 0 matches a low signal on a probe.
|
||||
* Only low/high triggers (but not e.g. rising/falling) are supported.
|
||||
*/
|
||||
uint8_t trigger_pattern;
|
||||
|
||||
/**
|
||||
* Trigger mask (MSB = channel 7, LSB = channel 0).
|
||||
* A 1 bit means "must match trigger_pattern", 0 means "don't care".
|
||||
*/
|
||||
uint8_t trigger_mask;
|
||||
|
||||
/** Time (in seconds) before the trigger times out. */
|
||||
uint64_t trigger_timeout;
|
||||
|
||||
/** Tells us whether an SR_DF_TRIGGER packet was already sent. */
|
||||
int trigger_found;
|
||||
|
||||
/** TODO */
|
||||
time_t done;
|
||||
|
||||
/** Counter/index for the data block to be read. */
|
||||
int block_counter;
|
||||
|
||||
/** The divcount value (determines the sample period) for the LA8. */
|
||||
uint8_t divcount;
|
||||
};
|
||||
|
||||
/* driver.c */
|
||||
extern SR_PRIV uint64_t supported_samplerates[];
|
||||
extern SR_PRIV const int hwcaps[];
|
||||
extern SR_PRIV const char *probe_names[];
|
||||
extern const struct sr_samplerates samplerates;
|
||||
SR_PRIV void fill_supported_samplerates_if_needed(void);
|
||||
SR_PRIV int is_valid_samplerate(uint64_t samplerate);
|
||||
SR_PRIV uint8_t samplerate_to_divcount(uint64_t samplerate);
|
||||
SR_PRIV int la8_write(struct context *ctx, uint8_t *buf, int size);
|
||||
SR_PRIV int la8_read(struct context *ctx, uint8_t *buf, int size);
|
||||
SR_PRIV int la8_close(struct context *ctx);
|
||||
SR_PRIV int la8_close_usb_reset_sequencer(struct context *ctx);
|
||||
SR_PRIV int la8_reset(struct context *ctx);
|
||||
SR_PRIV int configure_probes(struct context *ctx, const GSList *probes);
|
||||
SR_PRIV int set_samplerate(struct sr_dev_inst *sdi, uint64_t samplerate);
|
||||
SR_PRIV int la8_read_block(struct context *ctx);
|
||||
SR_PRIV void send_block_to_session_bus(struct context *ctx, int block);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue