Add chronovu-la8 output file format.

This commit is contained in:
Uwe Hermann 2011-04-10 23:33:43 +02:00
parent 20ebd1fe1d
commit 8c48f17944
3 changed files with 244 additions and 0 deletions

View File

@ -27,6 +27,7 @@ libsigrokoutput_la_SOURCES = \
output_vcd.c \
output_ols.c \
output_gnuplot.c \
output_chronovu_la8.c \
output.c
# Temporarily disabled: output_analog.c

View File

@ -26,6 +26,7 @@ extern struct sr_output_format output_binary;
extern struct sr_output_format output_vcd;
extern struct sr_output_format output_ols;
extern struct sr_output_format output_gnuplot;
extern struct sr_output_format output_chronovu_la8;
/* extern struct sr_output_format output_analog_bits; */
/* extern struct sr_output_format output_analog_gnuplot; */
@ -37,6 +38,7 @@ static struct sr_output_format *output_module_list[] = {
&output_vcd,
&output_ols,
&output_gnuplot,
&output_chronovu_la8,
/* &output_analog_bits, */
/* &output_analog_gnuplot, */
NULL,

View File

@ -0,0 +1,241 @@
/*
* This file is part of the sigrok project.
*
* Copyright (C) 2011 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 <stdlib.h>
#include <string.h>
#include <glib.h>
#include <sigrok.h>
struct context {
unsigned int num_enabled_probes;
unsigned int unitsize;
char *probelist[SR_MAX_NUM_PROBES + 1];
uint64_t trigger_point;
uint64_t samplerate;
};
/**
* 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.
*/
static int is_valid_samplerate(uint64_t samplerate)
{
unsigned int i;
for (i = 0; i < 255; i++) {
if (samplerate == (SR_MHZ(100) / (i + 1)))
return 1;
}
g_warning("la8 out: %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.
*/
static uint8_t samplerate_to_divcount(uint64_t samplerate)
{
if (samplerate == 0) {
g_warning("la8 out: %s: samplerate was 0", __func__);
return 0xff;
}
if (!is_valid_samplerate(samplerate)) {
g_warning("la8 out: %s: can't get divcount, samplerate invalid",
__func__);
return 0xff;
}
return (SR_MHZ(100) / samplerate) - 1;
}
static int init(struct sr_output *o)
{
struct context *ctx;
struct sr_probe *probe;
GSList *l;
int num_probes;
uint64_t samplerate;
if (!o) {
g_warning("la8 out: %s: o was NULL", __func__);
return SR_ERR_ARG;
}
if (!o->device) {
g_warning("la8 out: %s: o->device was NULL", __func__);
return SR_ERR_ARG;
}
if (!o->device->plugin) {
g_warning("la8 out: %s: o->device->plugin was NULL", __func__);
return SR_ERR_ARG;
}
if (!(ctx = calloc(1, sizeof(struct context)))) {
g_warning("la8 out: %s: ctx calloc failed", __func__);
return SR_ERR_MALLOC;
}
o->internal = ctx;
/* Get the number of probes, their names, and the unitsize. */
/* TODO: Error handling. */
for (l = o->device->probes; l; l = l->next) {
probe = l->data;
if (!probe->enabled)
continue;
ctx->probelist[ctx->num_enabled_probes++] = probe->name;
}
ctx->probelist[ctx->num_enabled_probes] = 0;
ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
num_probes = g_slist_length(o->device->probes);
if (sr_device_has_hwcap(o->device, SR_HWCAP_SAMPLERATE)) {
samplerate = *((uint64_t *) o->device->plugin->get_device_info(
o->device->plugin_index, SR_DI_CUR_SAMPLERATE));
/* TODO: Error checks. */
} else {
samplerate = 0; /* TODO: Error or set some value? */
}
ctx->samplerate = samplerate;
return 0; /* TODO: SR_OK? */
}
static int event(struct sr_output *o, int event_type, char **data_out,
uint64_t *length_out)
{
struct context *ctx;
char *outbuf;
if (!o) {
g_warning("la8 out: %s: o was NULL", __func__);
return SR_ERR_ARG;
}
if (!(ctx = o->internal)) {
g_warning("la8 out: %s: o->internal was NULL", __func__);
return SR_ERR_ARG;
}
if (!data_out) {
g_warning("la8 out: %s: data_out was NULL", __func__);
return SR_ERR_ARG;
}
switch (event_type) {
case SR_DF_TRIGGER:
g_debug("la8 out: %s: SR_DF_TRIGGER event", __func__);
/* Save the trigger point for later (SR_DF_END). */
ctx->trigger_point = 0; /* TODO: Store _actual_ value. */
break;
case SR_DF_END:
g_debug("la8 out: %s: SR_DF_END event", __func__);
if (!(outbuf = malloc(4 + 1))) {
g_warning("la8 out: %s: outbuf malloc failed",
__func__);
return SR_ERR_MALLOC;
}
/* One byte for the 'divcount' value. */
outbuf[0] = samplerate_to_divcount(ctx->samplerate);
// if (outbuf[0] == 0xff) {
// g_warning("la8 out: %s: invalid divcount", __func__);
// return SR_ERR;
// }
/* Four bytes (little endian) for the trigger point. */
outbuf[1] = (ctx->trigger_point >> 0) & 0xff;
outbuf[2] = (ctx->trigger_point >> 8) & 0xff;
outbuf[3] = (ctx->trigger_point >> 16) & 0xff;
outbuf[4] = (ctx->trigger_point >> 24) & 0xff;
*data_out = outbuf;
*length_out = 4 + 1;
free(o->internal);
o->internal = NULL;
break;
default:
g_warning("la8 out: %s: unsupported event type: %d", __func__,
event_type);
*data_out = NULL;
*length_out = 0;
break;
}
return SR_OK;
}
static int data(struct sr_output *o, const char *data_in, uint64_t length_in,
char **data_out, uint64_t *length_out)
{
struct context *ctx;
char *outbuf;
if (!o) {
g_warning("la8 out: %s: o was NULL", __func__);
return SR_ERR_ARG;
}
if (!(ctx = o->internal)) {
g_warning("la8 out: %s: o->internal was NULL", __func__);
return SR_ERR_ARG;
}
if (!data_in) {
g_warning("la8 out: %s: data_in was NULL", __func__);
return SR_ERR_ARG;
}
if (!(outbuf = calloc(1, length_in))) {
g_warning("la8 out: %s: outbuf calloc failed", __func__);
return SR_ERR_MALLOC;
}
memcpy(outbuf, data_in, length_in);
*data_out = outbuf;
*length_out = length_in;
return SR_OK;
}
struct sr_output_format output_chronovu_la8 = {
.id = "chronovu-la8",
.description = "ChronoVu LA8",
.df_type = SR_DF_LOGIC,
.init = init,
.data = data,
.event = event,
};