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libsigrok/hardware/rigol-ds1xx2/api.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2012 Martin Ling <martin-git@earth.li>
* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"
#define NUM_TIMEBASE 12
#define NUM_VDIV 8
static const int32_t hwcaps[] = {
SR_CONF_OSCILLOSCOPE,
SR_CONF_TIMEBASE,
SR_CONF_TRIGGER_SOURCE,
SR_CONF_TRIGGER_SLOPE,
SR_CONF_HORIZ_TRIGGERPOS,
SR_CONF_VDIV,
SR_CONF_COUPLING,
SR_CONF_NUM_TIMEBASE,
SR_CONF_NUM_VDIV,
};
static const uint64_t timebases[][2] = {
/* nanoseconds */
{ 2, 1000000000 },
{ 5, 1000000000 },
{ 10, 1000000000 },
{ 20, 1000000000 },
{ 50, 1000000000 },
{ 100, 1000000000 },
{ 500, 1000000000 },
/* microseconds */
{ 1, 1000000 },
{ 2, 1000000 },
{ 5, 1000000 },
{ 10, 1000000 },
{ 20, 1000000 },
{ 50, 1000000 },
{ 100, 1000000 },
{ 200, 1000000 },
{ 500, 1000000 },
/* milliseconds */
{ 1, 1000 },
{ 2, 1000 },
{ 5, 1000 },
{ 10, 1000 },
{ 20, 1000 },
{ 50, 1000 },
{ 100, 1000 },
{ 200, 1000 },
{ 500, 1000 },
/* seconds */
{ 1, 1 },
{ 2, 1 },
{ 5, 1 },
{ 10, 1 },
{ 20, 1 },
{ 50, 1 },
};
static const uint64_t vdivs[][2] = {
/* millivolts */
{ 2, 1000 },
{ 5, 1000 },
{ 10, 1000 },
{ 20, 1000 },
{ 50, 1000 },
{ 100, 1000 },
{ 200, 1000 },
{ 500, 1000 },
/* volts */
{ 1, 1 },
{ 2, 1 },
{ 5, 1 },
{ 10, 1 },
};
static const char *trigger_sources[] = {
"CH1",
"CH2",
"EXT",
"AC Line",
"D0",
"D1",
"D2",
"D3",
"D4",
"D5",
"D6",
"D7",
"D8",
"D9",
"D10",
"D11",
"D12",
"D13",
"D14",
"D15",
};
static const char *coupling[] = {
"AC",
"DC",
"GND",
};
static const char *supported_models[] = {
"DS1052E",
"DS1102E",
"DS1052D",
"DS1102D",
};
SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
static struct sr_dev_driver *di = &rigol_ds1xx2_driver_info;
/* Properly close and free all devices. */
static int clear_instances(void)
{
struct sr_dev_inst *sdi;
struct drv_context *drvc;
struct dev_context *devc;
GSList *l;
if (!(drvc = di->priv))
return SR_OK;
for (l = drvc->instances; l; l = l->next) {
if (!(sdi = l->data))
continue;
if (!(devc = sdi->priv))
continue;
g_free(devc->device);
g_free(devc->coupling[0]);
g_free(devc->coupling[1]);
g_free(devc->trigger_source);
g_free(devc->trigger_slope);
close(devc->fd);
sr_dev_inst_free(sdi);
}
g_slist_free(drvc->instances);
drvc->instances = NULL;
return SR_OK;
}
static int set_cfg(const struct sr_dev_inst *sdi, const char *format, ...)
{
struct dev_context *devc;
va_list args;
char buf[256];
devc = sdi->priv;
va_start(args, format);
vsnprintf(buf, 255, format, args);
va_end(args);
if (rigol_ds1xx2_send(devc, buf) != SR_OK)
return SR_ERR;
/* When setting a bunch of parameters in a row, the DS1052E scrambles
* some of them unless there is at least 100ms delay in between. */
sr_spew("delay %dms", 100);
g_usleep(100);
return SR_OK;
}
static int hw_init(struct sr_context *sr_ctx)
{
return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
}
static GSList *hw_scan(GSList *options)
{
struct drv_context *drvc;
struct sr_dev_inst *sdi;
struct dev_context *devc;
struct sr_probe *probe;
GSList *devices;
GDir *dir;
const gchar *dev_name;
const gchar *dev_dir = "/dev/";
const gchar *prefix = "usbtmc";
gchar *device;
const gchar *idn_query = "*IDN?";
unsigned int i;
int len, num_tokens, fd;
const gchar *delimiter = ",";
gchar **tokens;
const char *manufacturer, *model, *version;
gboolean matched = FALSE;
gboolean has_digital = FALSE;
char buf[256];
gchar *channel_name;
(void)options;
drvc = di->priv;
drvc->instances = NULL;
devices = NULL;
dir = g_dir_open("/sys/class/usb/", 0, NULL);
if (dir == NULL)
return NULL;
while ((dev_name = g_dir_read_name(dir)) != NULL) {
if (strncmp(dev_name, prefix, strlen(prefix)))
continue;
device = g_strconcat(dev_dir, dev_name, NULL);
fd = open(device, O_RDWR);
len = write(fd, idn_query, strlen(idn_query));
len = read(fd, buf, sizeof(buf));
close(fd);
if (len == 0) {
g_free(device);
return NULL;
}
buf[len] = 0;
tokens = g_strsplit(buf, delimiter, 0);
close(fd);
sr_dbg("response: %s %d [%s]", device, len, buf);
for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
if (num_tokens < 4) {
g_strfreev(tokens);
g_free(device);
return NULL;
}
manufacturer = tokens[0];
model = tokens[1];
version = tokens[3];
if (strcmp(manufacturer, "Rigol Technologies")) {
g_strfreev(tokens);
g_free(device);
return NULL;
}
for (i = 0; i < ARRAY_SIZE(supported_models); i++) {
if (!strcmp(model, supported_models[i])) {
matched = 1;
has_digital = g_str_has_suffix(model, "D");
break;
}
}
if (!matched || !(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE,
manufacturer, model, version))) {
g_strfreev(tokens);
g_free(device);
return NULL;
}
g_strfreev(tokens);
if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
sr_err("Device context malloc failed.");
g_free(device);
return NULL;
}
devc->limit_frames = 0;
devc->device = device;
devc->has_digital = has_digital;
sdi->priv = devc;
sdi->driver = di;
for (i = 0; i < 2; i++) {
if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
i == 0 ? "CH1" : "CH2")))
return NULL;
sdi->probes = g_slist_append(sdi->probes, probe);
}
if (devc->has_digital) {
for (i = 0; i < 16; i++) {
if (!(channel_name = g_strdup_printf("D%d", i)))
return NULL;
probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, channel_name);
g_free(channel_name);
if (!probe)
return NULL;
sdi->probes = g_slist_append(sdi->probes, probe);
}
}
drvc->instances = g_slist_append(drvc->instances, sdi);
devices = g_slist_append(devices, sdi);
}
g_dir_close(dir);
return devices;
}
static GSList *hw_dev_list(void)
{
return ((struct drv_context *)(di->priv))->instances;
}
static int hw_dev_open(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
int fd;
devc = sdi->priv;
if ((fd = open(devc->device, O_RDWR)) == -1)
return SR_ERR;
devc->fd = fd;
if (rigol_ds1xx2_get_dev_cfg(sdi) != SR_OK)
/* TODO: force configuration? */
return SR_ERR;
return SR_OK;
}
static int hw_dev_close(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
devc = sdi->priv;
close(devc->fd);
return SR_OK;
}
static int hw_cleanup(void)
{
clear_instances();
return SR_OK;
}
static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
{
(void)sdi;
switch (id) {
case SR_CONF_NUM_TIMEBASE:
*data = g_variant_new_int32(NUM_TIMEBASE);
break;
case SR_CONF_NUM_VDIV:
*data = g_variant_new_int32(NUM_VDIV);
break;
default:
return SR_ERR_ARG;
}
return SR_OK;
}
static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
uint64_t tmp_u64, p, q;
double t_dbl;
unsigned int i;
int ret;
const char *tmp_str;
devc = sdi->priv;
if (sdi->status != SR_ST_ACTIVE) {
sr_err("Device inactive, can't set config options.");
return SR_ERR;
}
ret = SR_OK;
switch (id) {
case SR_CONF_LIMIT_FRAMES:
devc->limit_frames = g_variant_get_uint64(data);
break;
case SR_CONF_TRIGGER_SLOPE:
tmp_u64 = g_variant_get_uint64(data);
if (tmp_u64 != 0 && tmp_u64 != 1)
return SR_ERR;
g_free(devc->trigger_slope);
devc->trigger_slope = g_strdup(tmp_u64 ? "POS" : "NEG");
ret = set_cfg(sdi, ":TRIG:EDGE:SLOP %s", devc->trigger_slope);
break;
case SR_CONF_HORIZ_TRIGGERPOS:
t_dbl = g_variant_get_double(data);
if (t_dbl < 0.0 || t_dbl > 1.0)
return SR_ERR;
devc->horiz_triggerpos = t_dbl;
/* We have the trigger offset as a percentage of the frame, but
* need to express this in seconds. */
t_dbl = -(devc->horiz_triggerpos - 0.5) * devc->timebase * NUM_TIMEBASE;
ret = set_cfg(sdi, ":TIM:OFFS %.6f", t_dbl);
break;
case SR_CONF_TIMEBASE:
g_variant_get(data, "(tt)", &p, &q);
for (i = 0; i < ARRAY_SIZE(timebases); i++) {
if (timebases[i][0] == p && timebases[i][1] == q) {
devc->timebase = (float)p / q;
ret = set_cfg(sdi, ":TIM:SCAL %.9f", devc->timebase);
break;
}
}
if (i == ARRAY_SIZE(timebases))
ret = SR_ERR_ARG;
break;
case SR_CONF_TRIGGER_SOURCE:
tmp_str = g_variant_get_string(data, NULL);
for (i = 0; i < ARRAY_SIZE(trigger_sources); i++) {
if (!strcmp(trigger_sources[i], tmp_str)) {
g_free(devc->trigger_source);
devc->trigger_source = g_strdup(trigger_sources[i]);
if (!strcmp(devc->trigger_source, "AC Line"))
tmp_str = "ACL";
else if (!strcmp(devc->trigger_source, "CH1"))
tmp_str = "CHAN1";
else if (!strcmp(devc->trigger_source, "CH2"))
tmp_str = "CHAN2";
else
tmp_str = (char *)devc->trigger_source;
ret = set_cfg(sdi, ":TRIG:EDGE:SOUR %s", tmp_str);
break;
}
}
if (i == ARRAY_SIZE(trigger_sources))
ret = SR_ERR_ARG;
break;
case SR_CONF_VDIV:
g_variant_get(data, "(tt)", &p, &q);
for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
if (vdivs[i][0] != p || vdivs[i][1] != q)
continue;
devc->vdiv[0] = devc->vdiv[1] = (float)p / q;
set_cfg(sdi, ":CHAN1:SCAL %.3f", devc->vdiv[0]);
ret = set_cfg(sdi, ":CHAN2:SCAL %.3f", devc->vdiv[1]);
break;
}
if (i == ARRAY_SIZE(vdivs))
ret = SR_ERR_ARG;
break;
case SR_CONF_COUPLING:
/* TODO: Not supporting coupling per channel yet. */
tmp_str = g_variant_get_string(data, NULL);
for (i = 0; i < ARRAY_SIZE(coupling); i++) {
if (!strcmp(tmp_str, coupling[i])) {
g_free(devc->coupling[0]);
g_free(devc->coupling[1]);
devc->coupling[0] = g_strdup(coupling[i]);
devc->coupling[1] = g_strdup(coupling[i]);
set_cfg(sdi, ":CHAN1:COUP %s", devc->coupling[0]);
ret = set_cfg(sdi, ":CHAN2:COUP %s", devc->coupling[1]);
break;
}
}
if (i == ARRAY_SIZE(coupling))
ret = SR_ERR_ARG;
break;
default:
sr_err("Unknown hardware capability: %d.", id);
ret = SR_ERR_ARG;
break;
}
return ret;
}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
{
GVariant *tuple, *rational[2];
GVariantBuilder gvb;
unsigned int i;
struct dev_context *devc = sdi->priv;
switch (key) {
case SR_CONF_DEVICE_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
break;
case SR_CONF_COUPLING:
*data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
break;
case SR_CONF_VDIV:
g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
rational[0] = g_variant_new_uint64(vdivs[i][0]);
rational[1] = g_variant_new_uint64(vdivs[i][1]);
tuple = g_variant_new_tuple(rational, 2);
g_variant_builder_add_value(&gvb, tuple);
}
*data = g_variant_builder_end(&gvb);
break;
case SR_CONF_TIMEBASE:
g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
for (i = 0; i < ARRAY_SIZE(timebases); i++) {
rational[0] = g_variant_new_uint64(timebases[i][0]);
rational[1] = g_variant_new_uint64(timebases[i][1]);
tuple = g_variant_new_tuple(rational, 2);
g_variant_builder_add_value(&gvb, tuple);
}
*data = g_variant_builder_end(&gvb);
break;
case SR_CONF_TRIGGER_SOURCE:
*data = g_variant_new_strv(trigger_sources,
devc->has_digital ? ARRAY_SIZE(trigger_sources) : 4);
break;
default:
return SR_ERR_ARG;
}
return SR_OK;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
struct dev_context *devc;
struct sr_probe *probe;
GSList *l;
char cmd[256];
(void)cb_data;
devc = sdi->priv;
for (l = sdi->probes; l; l = l->next) {
probe = l->data;
sr_dbg("handling probe %s", probe->name);
if (probe->type == SR_PROBE_ANALOG) {
if (probe->enabled)
devc->enabled_analog_probes = g_slist_append(
devc->enabled_analog_probes, probe);
if (probe->enabled != devc->analog_channels[probe->index]) {
/* Enabled channel is currently disabled, or vice versa. */
sprintf(cmd, ":CHAN%d:DISP %s", probe->index + 1,
probe->enabled ? "ON" : "OFF");
if (rigol_ds1xx2_send(devc, cmd) != SR_OK)
return SR_ERR;
}
} else if (probe->type == SR_PROBE_LOGIC) {
if (probe->enabled)
devc->enabled_digital_probes = g_slist_append(
devc->enabled_digital_probes, probe);
if (probe->enabled != devc->digital_channels[probe->index]) {
/* Enabled channel is currently disabled, or vice versa. */
sprintf(cmd, ":DIG%d:TURN %s", probe->index,
probe->enabled ? "ON" : "OFF");
if (rigol_ds1xx2_send(devc, cmd) != SR_OK)
return SR_ERR;
}
}
}
if (!devc->enabled_analog_probes && !devc->enabled_digital_probes)
return SR_ERR;
sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive, (void *)sdi);
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
/* Fetch the first frame. */
if (devc->enabled_analog_probes) {
devc->channel_frame = devc->enabled_analog_probes->data;
if (rigol_ds1xx2_send(devc, ":WAV:DATA? CHAN%d",
devc->channel_frame->index + 1) != SR_OK)
return SR_ERR;
} else {
devc->channel_frame = devc->enabled_digital_probes->data;
if (rigol_ds1xx2_send(devc, ":WAV:DATA? DIG") != SR_OK)
return SR_ERR;
}
devc->num_frame_bytes = 0;
return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
struct dev_context *devc;
(void)cb_data;
devc = sdi->priv;
if (sdi->status != SR_ST_ACTIVE) {
sr_err("Device inactive, can't stop acquisition.");
return SR_ERR;
}
g_slist_free(devc->enabled_analog_probes);
g_slist_free(devc->enabled_digital_probes);
devc->enabled_analog_probes = NULL;
devc->enabled_digital_probes = NULL;
sr_source_remove(devc->fd);
return SR_OK;
}
SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info = {
.name = "rigol-ds1xx2",
.longname = "Rigol DS1xx2",
.api_version = 1,
.init = hw_init,
.cleanup = hw_cleanup,
.scan = hw_scan,
.dev_list = hw_dev_list,
.dev_clear = clear_instances,
.config_get = config_get,
.config_set = config_set,
.config_list = config_list,
.dev_open = hw_dev_open,
.dev_close = hw_dev_close,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = dev_acquisition_stop,
.priv = NULL,
};
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