libsigrok/hardware/uni-t-dmm/api.c

348 lines
7.9 KiB
C

/*
* This file is part of the sigrok project.
*
* Copyright (C) 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 <stdlib.h>
#include <string.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"
static const int hwcaps[] = {
SR_HWCAP_MULTIMETER,
SR_HWCAP_LIMIT_SAMPLES,
SR_HWCAP_LIMIT_MSEC,
SR_HWCAP_CONTINUOUS,
0,
};
static const char *probe_names[] = {
"Probe",
NULL,
};
SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
static struct sr_dev_driver *di_ut61d = &uni_t_ut61d_driver_info;
static struct sr_dev_driver *di_vc820 = &voltcraft_vc820_driver_info;
/* After hw_init() this will point to a device-specific entry (see above). */
static struct sr_dev_driver *di = NULL;
static int clear_instances(void)
{
/* TODO: Use common code later. */
return SR_OK;
}
static int hw_init(int dmm)
{
int ret;
struct drv_context *drvc;
if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
sr_err("Driver context malloc failed.");
return SR_ERR_MALLOC;
}
if ((ret = libusb_init(NULL)) < 0) {
sr_err("Failed to initialize libusb: %s.",
libusb_error_name(ret));
return SR_ERR;
}
if (dmm == UNI_T_UT61D)
di = di_ut61d;
else if (dmm == VOLTCRAFT_VC820)
di = di_vc820;
sr_dbg("Selected '%s' subdriver.", di->name);
di->priv = drvc;
return SR_OK;
}
static int hw_init_ut61d(void)
{
return hw_init(UNI_T_UT61D);
}
static int hw_init_vc820(void)
{
return hw_init(VOLTCRAFT_VC820);
}
static GSList *hw_scan(GSList *options)
{
GSList *devices, *l;
struct sr_dev_inst *sdi;
struct dev_context *devc;
struct drv_context *drvc;
struct sr_probe *probe;
struct libusb_device *ldev;
int i, devcnt;
(void)options;
drvc = di->priv;
devices = NULL;
if (!(l = sr_usb_connect(NULL, "1a86.e008")))
return NULL;
for (i = 0; i < (int)g_slist_length(l); i++) {
ldev = (struct libusb_device *)l->data;
if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
sr_err("Device context malloc failed.");
return NULL;
}
devcnt = g_slist_length(drvc->instances);
if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_INACTIVE,
di->longname, NULL, NULL))) {
sr_err("sr_dev_inst_new returned NULL.");
return NULL;
}
sdi->priv = devc;
sdi->driver = di;
if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
return NULL;
sdi->probes = g_slist_append(sdi->probes, probe);
devc->usb = sr_usb_dev_inst_new(
libusb_get_bus_number(ldev),
libusb_get_device_address(ldev), NULL);
drvc->instances = g_slist_append(drvc->instances, l->data);
devices = g_slist_append(devices, sdi);
}
return devices;
}
static GSList *hw_dev_list(void)
{
struct drv_context *drvc;
drvc = di->priv;
return drvc->instances;
}
static int hw_dev_open(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
devc = sdi->priv;
return sr_usb_open(NULL, devc->usb);
}
static int hw_dev_close(struct sr_dev_inst *sdi)
{
(void)sdi;
/* TODO */
return SR_OK;
}
static int hw_cleanup(void)
{
clear_instances();
// libusb_exit(NULL);
return SR_OK;
}
static int hw_info_get(int info_id, const void **data,
const struct sr_dev_inst *sdi)
{
(void)sdi;
sr_spew("Backend requested info_id %d.", info_id);
switch (info_id) {
case SR_DI_HWCAPS:
*data = hwcaps;
sr_spew("%s: Returning hwcaps.", __func__);
break;
case SR_DI_NUM_PROBES:
*data = GINT_TO_POINTER(1);
sr_spew("%s: Returning number of probes.", __func__);
break;
case SR_DI_PROBE_NAMES:
*data = probe_names;
sr_spew("%s: Returning probe names.", __func__);
break;
case SR_DI_SAMPLERATES:
/* TODO: Get rid of this. */
*data = NULL;
sr_spew("%s: Returning samplerates.", __func__);
return SR_ERR_ARG;
break;
case SR_DI_CUR_SAMPLERATE:
/* TODO: Get rid of this. */
*data = NULL;
sr_spew("%s: Returning current samplerate.", __func__);
return SR_ERR_ARG;
break;
default:
sr_err("%s: Unknown info_id %d.", __func__, info_id);
return SR_ERR_ARG;
break;
}
return SR_OK;
}
static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
const void *value)
{
struct dev_context *devc;
devc = sdi->priv;
switch (hwcap) {
case SR_HWCAP_LIMIT_MSEC:
/* TODO: Not yet implemented. */
if (*(const uint64_t *)value == 0) {
sr_err("Time limit cannot be 0.");
return SR_ERR;
}
devc->limit_msec = *(const uint64_t *)value;
sr_dbg("Setting time limit to %" PRIu64 "ms.",
devc->limit_msec);
break;
case SR_HWCAP_LIMIT_SAMPLES:
if (*(const uint64_t *)value == 0) {
sr_err("Sample limit cannot be 0.");
return SR_ERR;
}
devc->limit_samples = *(const uint64_t *)value;
sr_dbg("Setting sample limit to %" PRIu64 ".",
devc->limit_samples);
break;
default:
sr_err("Unknown capability: %d.", hwcap);
return SR_ERR;
break;
}
return SR_OK;
}
static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data)
{
struct sr_datafeed_packet packet;
struct sr_datafeed_header header;
struct sr_datafeed_meta_analog meta;
struct dev_context *devc;
devc = sdi->priv;
sr_dbg("Starting acquisition.");
devc->cb_data = cb_data;
/* Send header packet to the session bus. */
sr_dbg("Sending SR_DF_HEADER.");
packet.type = SR_DF_HEADER;
packet.payload = (uint8_t *)&header;
header.feed_version = 1;
gettimeofday(&header.starttime, NULL);
sr_session_send(devc->cb_data, &packet);
/* Send metadata about the SR_DF_ANALOG packets to come. */
sr_dbg("Sending SR_DF_META_ANALOG.");
packet.type = SR_DF_META_ANALOG;
packet.payload = &meta;
meta.num_probes = 1;
sr_session_send(devc->cb_data, &packet);
if (!strcmp(di->name, "uni-t-ut61d")) {
sr_source_add(0, 0, 10 /* poll_timeout */,
uni_t_ut61d_receive_data, (void *)sdi);
} else if (!strcmp(di->name, "voltcraft-vc820")) {
sr_source_add(0, 0, 10 /* poll_timeout */,
voltcraft_vc820_receive_data, (void *)sdi);
}
return SR_OK;
}
static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
struct sr_datafeed_packet packet;
(void)sdi;
sr_dbg("Stopping acquisition.");
/* Send end packet to the session bus. */
sr_dbg("Sending SR_DF_END.");
packet.type = SR_DF_END;
sr_session_send(cb_data, &packet);
/* TODO? */
sr_source_remove(0);
return SR_OK;
}
SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info = {
.name = "uni-t-ut61d",
.longname = "UNI-T UT61D",
.api_version = 1,
.init = hw_init_ut61d,
.cleanup = hw_cleanup,
.scan = hw_scan,
.dev_list = hw_dev_list,
.dev_clear = clear_instances,
.dev_open = hw_dev_open,
.dev_close = hw_dev_close,
.info_get = hw_info_get,
.dev_config_set = hw_dev_config_set,
.dev_acquisition_start = hw_dev_acquisition_start,
.dev_acquisition_stop = hw_dev_acquisition_stop,
.priv = NULL,
};
SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info = {
.name = "voltcraft-vc820",
.longname = "Voltcraft VC-820",
.api_version = 1,
.init = hw_init_vc820,
.cleanup = hw_cleanup,
.scan = hw_scan,
.dev_list = hw_dev_list,
.dev_clear = clear_instances,
.dev_open = hw_dev_open,
.dev_close = hw_dev_close,
.info_get = hw_info_get,
.dev_config_set = hw_dev_config_set,
.dev_acquisition_start = hw_dev_acquisition_start,
.dev_acquisition_stop = hw_dev_acquisition_stop,
.priv = NULL,
};