libsigrok/hardware/kecheng-kc-330b/api.c

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/*
* This file is part of the libsigrok project.
*
* 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 <string.h>
#include "protocol.h"
#define USB_CONN "1041.8101"
#define VENDOR "Kecheng"
#define USB_INTERFACE 0
static const int32_t hwcaps[] = {
SR_CONF_SOUNDLEVELMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_CONTINUOUS,
SR_CONF_DATALOG,
SR_CONF_SPL_WEIGHT_FREQ,
SR_CONF_SPL_WEIGHT_TIME,
SR_CONF_DATA_SOURCE,
};
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SR_PRIV const uint64_t kecheng_kc_330b_sample_intervals[][2] = {
{ 1, 8 },
{ 1, 2 },
{ 1, 1 },
{ 2, 1 },
{ 5, 1 },
{ 10, 1 },
{ 60, 1 },
};
static const char *weight_freq[] = {
"A",
"C",
};
static const char *weight_time[] = {
"F",
"S",
};
static const char *data_sources[] = {
"Live",
"Memory",
};
SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info;
static struct sr_dev_driver *di = &kecheng_kc_330b_driver_info;
static int init(struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
static int scan_kecheng(struct sr_usb_dev_inst *usb, char **model)
{
struct drv_context *drvc;
int len, ret;
unsigned char cmd, buf[32];
drvc = di->priv;
if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
return SR_ERR;
cmd = CMD_IDENTIFY;
ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5);
if (ret != 0) {
libusb_close(usb->devhdl);
sr_dbg("Failed to send Identify command: %s", libusb_error_name(ret));
return SR_ERR;
}
ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 32, &len, 10);
if (ret != 0) {
libusb_close(usb->devhdl);
sr_dbg("Failed to receive response: %s", libusb_error_name(ret));
return SR_ERR;
}
libusb_close(usb->devhdl);
usb->devhdl = NULL;
if (len < 2 || buf[0] != (CMD_IDENTIFY | 0x80) || buf[1] > 30) {
sr_dbg("Invalid response to Identify command");
return SR_ERR;
}
buf[buf[1] + 2] = '\x0';
*model = g_strndup((const gchar *)buf + 2, 30);
return SR_OK;
}
static GSList *scan(GSList *options)
{
struct drv_context *drvc;
struct dev_context *devc;
struct sr_dev_inst *sdi;
struct sr_probe *probe;
GSList *usb_devices, *devices, *l;
char *model;
(void)options;
drvc = di->priv;
drvc->instances = NULL;
devices = NULL;
if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
/* We have a list of sr_usb_dev_inst matching the connection
* string. Wrap them in sr_dev_inst and we're done. */
for (l = usb_devices; l; l = l->next) {
if (scan_kecheng(l->data, &model) != SR_OK)
continue;
if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, VENDOR,
model, NULL)))
return NULL;
g_free(model);
sdi->driver = di;
sdi->inst_type = SR_INST_USB;
sdi->conn = l->data;
if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "SPL")))
return NULL;
sdi->probes = g_slist_append(sdi->probes, probe);
if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
sr_dbg("Device context malloc failed.");
return NULL;
}
sdi->priv = devc;
devc->limit_samples = 0;
/* The protocol provides no way to read the current
* settings, so we'll enforce these. */
devc->sample_interval = DEFAULT_SAMPLE_INTERVAL;
devc->alarm_low = DEFAULT_ALARM_LOW;
devc->alarm_high = DEFAULT_ALARM_HIGH;
devc->mqflags = DEFAULT_WEIGHT_TIME | DEFAULT_WEIGHT_FREQ;
devc->data_source = DEFAULT_DATA_SOURCE;
devc->config_dirty = FALSE;
/* TODO: Set date/time? */
drvc->instances = g_slist_append(drvc->instances, sdi);
devices = g_slist_append(devices, sdi);
}
g_slist_free(usb_devices);
} else
g_slist_free_full(usb_devices, g_free);
return devices;
}
static GSList *dev_list(void)
{
return ((struct drv_context *)(di->priv))->instances;
}
static int dev_clear(void)
{
return std_dev_clear(di, NULL);
}
static int dev_open(struct sr_dev_inst *sdi)
{
struct drv_context *drvc;
struct sr_usb_dev_inst *usb;
int ret;
if (!(drvc = di->priv)) {
sr_err("Driver was not initialized.");
return SR_ERR;
}
usb = sdi->conn;
if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
return SR_ERR;
if ((ret = libusb_set_configuration(usb->devhdl, 1))) {
sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
return SR_ERR;
}
if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
return SR_ERR;
}
sdi->status = SR_ST_ACTIVE;
return ret;
}
static int dev_close(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
struct sr_usb_dev_inst *usb;
if (!di->priv) {
sr_err("Driver was not initialized.");
return SR_ERR;
}
usb = sdi->conn;
if (!usb->devhdl)
/* Nothing to do. */
return SR_OK;
/* This allows a frontend to configure the device without ever
* doing an acquisition step. */
devc = sdi->priv;
if (!devc->config_dirty)
kecheng_kc_330b_configure(sdi);
libusb_release_interface(usb->devhdl, USB_INTERFACE);
libusb_close(usb->devhdl);
usb->devhdl = NULL;
sdi->status = SR_ST_INACTIVE;
return SR_OK;
}
static int cleanup(void)
{
int ret;
struct drv_context *drvc;
if (!(drvc = di->priv))
/* Can get called on an unused driver, doesn't matter. */
return SR_OK;
ret = dev_clear();
g_free(drvc);
di->priv = NULL;
return ret;
}
static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
GVariant *rational[2];
const uint64_t *si;
devc = sdi->priv;
switch (key) {
case SR_CONF_LIMIT_SAMPLES:
*data = g_variant_new_uint64(devc->limit_samples);
break;
case SR_CONF_SAMPLE_INTERVAL:
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si = kecheng_kc_330b_sample_intervals[devc->sample_interval];
rational[0] = g_variant_new_uint64(si[0]);
rational[1] = g_variant_new_uint64(si[1]);
*data = g_variant_new_tuple(rational, 2);
break;
case SR_CONF_DATALOG:
/* There really isn't a way to be sure the device is logging. */
return SR_ERR_NA;
break;
case SR_CONF_SPL_WEIGHT_FREQ:
if (devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
*data = g_variant_new_string("A");
else
*data = g_variant_new_string("C");
break;
case SR_CONF_SPL_WEIGHT_TIME:
if (devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
*data = g_variant_new_string("F");
else
*data = g_variant_new_string("S");
break;
case SR_CONF_DATA_SOURCE:
if (devc->data_source == DATA_SOURCE_LIVE)
*data = g_variant_new_string("Live");
else
*data = g_variant_new_string("Memory");
break;
default:
return SR_ERR_NA;
}
return SR_OK;
}
static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
uint64_t p, q;
unsigned int i;
int tmp, ret;
const char *tmp_str;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
if (!di->priv) {
sr_err("Driver was not initialized.");
return SR_ERR;
}
devc = sdi->priv;
ret = SR_OK;
switch (key) {
case SR_CONF_LIMIT_SAMPLES:
devc->limit_samples = g_variant_get_uint64(data);
sr_dbg("Setting sample limit to %" PRIu64 ".",
devc->limit_samples);
break;
case SR_CONF_SAMPLE_INTERVAL:
g_variant_get(data, "(tt)", &p, &q);
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for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
if (kecheng_kc_330b_sample_intervals[i][0] != p || kecheng_kc_330b_sample_intervals[i][1] != q)
continue;
devc->sample_interval = i;
devc->config_dirty = TRUE;
break;
}
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if (i == ARRAY_SIZE(kecheng_kc_330b_sample_intervals))
ret = SR_ERR_ARG;
break;
case SR_CONF_SPL_WEIGHT_FREQ:
tmp_str = g_variant_get_string(data, NULL);
if (!strcmp(tmp_str, "A"))
tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_A;
else if (!strcmp(tmp_str, "C"))
tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_C;
else
return SR_ERR_ARG;
devc->mqflags &= ~(SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C);
devc->mqflags |= tmp;
devc->config_dirty = TRUE;
break;
case SR_CONF_SPL_WEIGHT_TIME:
tmp_str = g_variant_get_string(data, NULL);
if (!strcmp(tmp_str, "F"))
tmp = SR_MQFLAG_SPL_TIME_WEIGHT_F;
else if (!strcmp(tmp_str, "S"))
tmp = SR_MQFLAG_SPL_TIME_WEIGHT_S;
else
return SR_ERR_ARG;
devc->mqflags &= ~(SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
devc->mqflags |= tmp;
devc->config_dirty = TRUE;
break;
case SR_CONF_DATA_SOURCE:
tmp_str = g_variant_get_string(data, NULL);
if (!strcmp(tmp_str, "Live"))
devc->data_source = DATA_SOURCE_LIVE;
else if (!strcmp(tmp_str, "Memory"))
devc->data_source = DATA_SOURCE_MEMORY;
else
return SR_ERR;
devc->config_dirty = TRUE;
break;
default:
ret = SR_ERR_NA;
}
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_SAMPLE_INTERVAL:
g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
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for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
rational[0] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][0]);
rational[1] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[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_SPL_WEIGHT_FREQ:
*data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
break;
case SR_CONF_SPL_WEIGHT_TIME:
*data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
break;
case SR_CONF_DATA_SOURCE:
*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
break;
default:
return SR_ERR_NA;
}
return SR_OK;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data)
{
struct drv_context *drvc;
struct dev_context *devc;
struct sr_datafeed_packet packet;
struct sr_datafeed_meta meta;
struct sr_config *src;
struct sr_usb_dev_inst *usb;
GVariant *gvar, *rational[2];
const struct libusb_pollfd **pfd;
const uint64_t *si;
int stored_mqflags, req_len, buf_len, len, ret, i;
unsigned char buf[9];
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
drvc = di->priv;
devc = sdi->priv;
usb = sdi->conn;
devc->cb_data = cb_data;
devc->num_samples = 0;
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
if (devc->data_source == DATA_SOURCE_LIVE) {
/* Force configuration. */
kecheng_kc_330b_configure(sdi);
if (kecheng_kc_330b_status_get(sdi, &ret) != SR_OK)
return SR_ERR;
if (ret != DEVICE_ACTIVE) {
sr_err("Device is inactive");
/* Still continue though, since the device will
* just return 30.0 until the user hits the button
* on the device -- and then start feeding good
* samples back. */
}
} else {
if (kecheng_kc_330b_log_info_get(sdi, buf) != SR_OK)
return SR_ERR;
stored_mqflags = buf[4] ? SR_MQFLAG_SPL_TIME_WEIGHT_S : SR_MQFLAG_SPL_TIME_WEIGHT_F;
stored_mqflags |= buf[5] ? SR_MQFLAG_SPL_FREQ_WEIGHT_C : SR_MQFLAG_SPL_FREQ_WEIGHT_A;
devc->stored_samples = (buf[7] << 8) | buf[8];
if (devc->stored_samples == 0) {
/* Notify frontend of empty log by sending start/end packets. */
packet.type = SR_DF_END;
sr_session_send(cb_data, &packet);
return SR_OK;
}
if (devc->limit_samples && devc->limit_samples < devc->stored_samples)
devc->stored_samples = devc->limit_samples;
si = kecheng_kc_330b_sample_intervals[buf[1]];
rational[0] = g_variant_new_uint64(si[0]);
rational[1] = g_variant_new_uint64(si[1]);
gvar = g_variant_new_tuple(rational, 2);
src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, gvar);
packet.type = SR_DF_META;
packet.payload = &meta;
meta.config = g_slist_append(NULL, src);
sr_session_send(devc->cb_data, &packet);
g_free(src);
}
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if (!(devc->xfer = libusb_alloc_transfer(0)))
return SR_ERR;
pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
for (i = 0; pfd[i]; i++) {
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/* Handle USB events every 10ms. */
sr_source_add(pfd[i]->fd, pfd[i]->events, 10,
kecheng_kc_330b_handle_events, (void *)sdi);
/* We'll need to remove this fd later. */
devc->usbfd[i] = pfd[i]->fd;
}
devc->usbfd[i] = -1;
if (devc->data_source == DATA_SOURCE_LIVE) {
buf[0] = CMD_GET_LIVE_SPL;
buf_len = 1;
devc->state = LIVE_SPL_WAIT;
devc->last_live_request = g_get_monotonic_time() / 1000;
req_len = 3;
} else {
buf[0] = CMD_GET_LOG_DATA;
buf[1] = 0;
buf[2] = 0;
buf_len = 4;
devc->state = LOG_DATA_WAIT;
if (devc->stored_samples < 63)
buf[3] = devc->stored_samples;
else
buf[3] = 63;
/* Command ack byte + 2 bytes per sample. */
req_len = 1 + buf[3] * 2;
}
ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, buf_len, &len, 5);
if (ret != 0 || len != 1) {
sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
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libusb_free_transfer(devc->xfer);
return SR_ERR;
}
libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
req_len, kecheng_kc_330b_receive_transfer, (void *)sdi, 15);
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if (libusb_submit_transfer(devc->xfer) != 0) {
libusb_free_transfer(devc->xfer);
return SR_ERR;
}
return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
struct dev_context *devc;
(void)cb_data;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
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/* Signal USB transfer handler to clean up and stop. */
sdi->status = SR_ST_STOPPING;
devc = sdi->priv;
if (devc->data_source == DATA_SOURCE_MEMORY && devc->config_dirty) {
/* The protocol doesn't have a command to clear stored data;
* it clears it whenever new configuration is set. That means
* we can't just configure the device any time we want when
* it's in DATA_SOURCE_MEMORY mode. The only safe time to do
* it is now, when we're sure we've pulled in all the stored
* data. */
kecheng_kc_330b_configure(sdi);
}
return SR_OK;
}
SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info = {
.name = "kecheng-kc-330b",
.longname = "Kecheng KC-330B",
.api_version = 1,
.init = init,
.cleanup = cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = dev_clear,
.config_get = config_get,
.config_set = config_set,
.config_list = config_list,
.dev_open = dev_open,
.dev_close = dev_close,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = dev_acquisition_stop,
.priv = NULL,
};