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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>
*
* 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_LIMIT_SAMPLES,
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",
};
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_slist_free(devc->enabled_probes);
close(devc->fd);
sr_dev_inst_free(sdi);
}
g_slist_free(drvc->instances);
drvc->instances = NULL;
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;
char buf[256];
(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;
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->device = device;
sdi->priv = devc;
sdi->driver = di;
for (i = 0; i < 2; i++) {
if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
i == 0 ? "CH1" : "CH2")))
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;
devc->scale = 1;
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 tmp_double;
unsigned int i;
int tmp_int, ret;
const char *tmp_str, *channel;
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);
rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SLOP %s\n",
tmp_u64 ? "POS" : "NEG");
break;
case SR_CONF_HORIZ_TRIGGERPOS:
tmp_double = g_variant_get_double(data);
rigol_ds1xx2_send_data(devc->fd, ":TIM:OFFS %.9f\n", tmp_double);
break;
case SR_CONF_TIMEBASE:
g_variant_get(data, "(tt)", &p, &q);
tmp_int = -1;
for (i = 0; i < ARRAY_SIZE(timebases); i++) {
if (timebases[i][0] == p && timebases[i][1] == q) {
tmp_int = i;
break;
}
}
if (tmp_int >= 0)
rigol_ds1xx2_send_data(devc->fd, ":TIM:SCAL %.9f\n",
(float)timebases[i][0] / timebases[i][1]);
break;
case SR_CONF_TRIGGER_SOURCE:
tmp_str = g_variant_get_string(data, NULL);
if (!strcmp(tmp_str, "CH1"))
channel = "CHAN1";
else if (!strcmp(tmp_str, "CH2"))
channel = "CHAN2";
else if (!strcmp(tmp_str, "EXT"))
channel = "EXT";
else if (!strcmp(tmp_str, "AC Line"))
channel = "ACL";
else {
ret = SR_ERR_ARG;
break;
}
rigol_ds1xx2_send_data(devc->fd, ":TRIG:EDGE:SOUR %s\n", channel);
break;
case SR_CONF_VDIV:
g_variant_get(data, "(tt)", &p, &q);
tmp_int = -1;
for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
if (vdivs[i][0] != p || vdivs[i][1] != q)
continue;
devc->scale = (float)vdivs[i][0] / vdivs[i][1];
rigol_ds1xx2_send_data(devc->fd, ":CHAN0:SCAL %.3f\n",
devc->scale);
rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL %.3f\n",
devc->scale);
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])) {
rigol_ds1xx2_send_data(devc->fd, ":CHAN0:COUP %s\n",
coupling[i]);
rigol_ds1xx2_send_data(devc->fd, ":CHAN1:COUP %s\n",
coupling[i]);
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;
(void)sdi;
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,
ARRAY_SIZE(trigger_sources));
break;
default:
return SR_ERR_ARG;
}
return SR_OK;
}
static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data)
{
struct dev_context *devc;
char buf[256];
int len;
(void)cb_data;
devc = sdi->priv;
devc->num_frames = 0;
sr_source_add(devc->fd, G_IO_IN, 50, rigol_ds1xx2_receive_data, (void *)sdi);
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
/* Hardcoded to CH1 only. */
devc->enabled_probes = g_slist_append(NULL, sdi->probes->data);
rigol_ds1xx2_send_data(devc->fd, ":CHAN1:SCAL?\n");
len = read(devc->fd, buf, sizeof(buf));
buf[len] = 0;
devc->scale = atof(buf);
sr_dbg("Scale is %.3f.", devc->scale);
rigol_ds1xx2_send_data(devc->fd, ":CHAN1:OFFS?\n");
len = read(devc->fd, buf, sizeof(buf));
buf[len] = 0;
devc->offset = atof(buf);
sr_dbg("Offset is %.6f.", devc->offset);
rigol_ds1xx2_send_data(devc->fd, ":WAV:DATA?\n");
return SR_OK;
}
static int hw_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;
}
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 = hw_dev_acquisition_start,
.dev_acquisition_stop = hw_dev_acquisition_stop,
.priv = NULL,
};
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