*/
#include <glib.h>
+#include <libusb.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"
+SR_PRIV struct sr_dev_inst *lascar_scan(int bus, int address);
SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
static struct sr_dev_driver *di = &lascar_el_usb_driver_info;
+static int hw_dev_close(struct sr_dev_inst *sdi);
+
+static const int hwopts[] = {
+ SR_CONF_CONN,
+ 0,
+};
+
+static const int hwcaps[] = {
+ SR_CONF_THERMOMETER,
+ SR_CONF_HYGROMETER,
+ SR_CONF_LIMIT_SAMPLES,
+ 0
+};
/* Properly close and free all devices. */
static int clear_instances(void)
if (!(devc = sdi->priv))
continue;
- /* TODO */
-
+ hw_dev_close(sdi);
+ sr_usb_dev_inst_free(devc->usb);
sr_dev_inst_free(sdi);
}
return SR_OK;
}
-static int hw_init(void)
+static int hw_init(struct sr_context *sr_ctx)
{
struct drv_context *drvc;
return SR_ERR_MALLOC;
}
- /* TODO */
-
+ drvc->sr_ctx = sr_ctx;
di->priv = drvc;
return SR_OK;
static GSList *hw_scan(GSList *options)
{
struct drv_context *drvc;
- GSList *devices;
+ struct dev_context *devc;
+ struct sr_dev_inst *sdi;
+ struct sr_usb_dev_inst *usb;
+ struct sr_config *src;
+ GSList *usb_devices, *devices, *l;
+ const char *conn;
(void)options;
- devices = NULL;
- drvc = di->priv;
- drvc->instances = NULL;
+ if (!(drvc = di->priv)) {
+ sr_err("Driver was not initialized.");
+ return NULL;
+ }
- /* TODO */
+ /* USB scan is always authoritative. */
+ clear_instances();
+
+ conn = NULL;
+ for (l = options; l; l = l->next) {
+ src = l->data;
+ switch (src->key) {
+ case SR_CONF_CONN:
+ conn = src->value;
+ break;
+ }
+ }
+ if (!conn)
+ return NULL;
+
+ devices = NULL;
+ if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, 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) {
+ usb = l->data;
+ if (!(sdi = lascar_scan(usb->bus, usb->address))) {
+ /* Not a Lascar EL-USB. */
+ g_free(usb);
+ continue;
+ }
+ devc = sdi->priv;
+ devc->usb = usb;
+ 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;
}
{
struct drv_context *drvc;
- drvc = di->priv;
+ if (!(drvc = di->priv)) {
+ sr_err("Driver was not initialized.");
+ return NULL;
+ }
return drvc->instances;
}
static int hw_dev_open(struct sr_dev_inst *sdi)
{
- /* TODO */
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ int ret;
- return SR_OK;
+ if (!(drvc = di->priv)) {
+ sr_err("Driver was not initialized.");
+ return SR_ERR;
+ }
+
+ devc = sdi->priv;
+ if (sr_usb_open(drvc->sr_ctx->libusb_ctx, devc->usb) != SR_OK)
+ return SR_ERR;
+
+ if ((ret = libusb_claim_interface(devc->usb->devhdl, LASCAR_INTERFACE))) {
+ sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
+ return SR_ERR;
+ }
+ sdi->status = SR_ST_ACTIVE;
+
+ return ret;
}
static int hw_dev_close(struct sr_dev_inst *sdi)
{
- /* TODO */
+ struct dev_context *devc;
+
+ if (!di->priv) {
+ sr_err("Driver was not initialized.");
+ return SR_ERR;
+ }
+
+ devc = sdi->priv;
+ if (!devc->usb->devhdl)
+ /* Nothing to do. */
+ return SR_OK;
+
+ libusb_release_interface(devc->usb->devhdl, LASCAR_INTERFACE);
+ libusb_close(devc->usb->devhdl);
+ devc->usb->devhdl = NULL;
+ g_free(devc->config);
+ sdi->status = SR_ST_INACTIVE;
+
return SR_OK;
}
static int hw_cleanup(void)
{
- clear_instances();
+ struct drv_context *drvc;
- /* TODO */
+ if (!(drvc = di->priv))
+ /* Can get called on an unused driver, doesn't matter. */
+ return SR_OK;
+
+ clear_instances();
+ g_free(drvc);
+ di->priv = NULL;
return SR_OK;
}
static int hw_info_get(int info_id, const void **data,
- const struct sr_dev_inst *sdi)
+ const struct sr_dev_inst *sdi)
{
+ (void)sdi;
+
switch (info_id) {
- /* TODO */
+ case SR_DI_HWOPTS:
+ *data = hwopts;
+ break;
+ case SR_DI_HWCAPS:
+ *data = hwcaps;
+ break;
default:
- sr_err("Unknown info_id: %d.", info_id);
return SR_ERR_ARG;
}
}
static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
- const void *value)
+ const void *value)
{
+ struct dev_context *devc;
int ret;
+ if (!di->priv) {
+ sr_err("Driver was not initialized.");
+ return SR_ERR;
+ }
if (sdi->status != SR_ST_ACTIVE) {
sr_err("Device inactive, can't set config options.");
return SR_ERR;
}
+ devc = sdi->priv;
ret = SR_OK;
switch (hwcap) {
- /* TODO */
+ case SR_CONF_LIMIT_SAMPLES:
+ devc->limit_samples = *(const uint64_t *)value;
+ sr_dbg("Setting sample limit to %" PRIu64 ".",
+ devc->limit_samples);
+ break;
default:
sr_err("Unknown hardware capability: %d.", hwcap);
ret = SR_ERR_ARG;
return ret;
}
+static void mark_xfer(struct libusb_transfer *xfer)
+{
+
+ if (xfer->status == LIBUSB_TRANSFER_COMPLETED)
+ xfer->user_data = GINT_TO_POINTER(1);
+ else
+ xfer->user_data = GINT_TO_POINTER(-1);
+
+}
+
+/* The Lascar software, in its infinite ignorance, reads a set of four
+ * bytes from the device config struct and interprets it as a float.
+ * That only works because they only use windows, and only on x86. However
+ * we may be running on any architecture, any operating system. So we have
+ * to convert these four bytes as the Lascar software would on windows/x86,
+ * to the local representation of a float.
+ * The source format is little-endian, with IEEE 754-2008 BINARY32 encoding. */
+static float binary32_le_to_float(unsigned char *buf)
+{
+ GFloatIEEE754 f;
+
+ f.v_float = 0;
+ f.mpn.sign = (buf[3] & 0x80) ? 1 : 0;
+ f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7);
+ f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16);
+
+ return f.v_float;
+}
+
+static int lascar_proc_config(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ int ret;
+
+ devc = sdi->priv;
+ if (!(devc->config = lascar_get_config(devc->usb->devhdl)))
+ return SR_ERR;
+
+ ret = SR_OK;
+ switch (devc->profile->logformat) {
+ case LOG_TEMP_RH:
+ devc->sample_size = 2;
+ devc->temp_unit = devc->config[0x2e] | (devc->config[0x2f] << 8);
+ if (devc->temp_unit != 0 && devc->temp_unit != 1) {
+ sr_dbg("invalid temperature unit %d", devc->temp_unit);
+ /* Default to Celcius, we're all adults here. */
+ devc->temp_unit = 0;
+ } else
+ sr_dbg("temperature unit is %s", devc->temp_unit
+ ? "Fahrenheit" : "Celcius");
+ break;
+ case LOG_CO:
+ devc->sample_size = 2;
+ devc->co_high = binary32_le_to_float(devc->config + 0x24);
+ devc->co_low = binary32_le_to_float(devc->config + 0x28);
+ sr_dbg("EL-USB-CO calibration high %f low %f", devc->co_high,
+ devc->co_low);
+ break;
+ default:
+ ret = SR_ERR_ARG;
+ }
+ devc->logged_samples = devc->config[0x1e] | (devc->config[0x1f] << 8);
+ sr_dbg("device log contains %d samples.", devc->logged_samples);
+
+ return ret;
+}
+
static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
- void *cb_data)
+ void *cb_data)
{
- /* TODO */
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_header header;
+ struct dev_context *devc;
+ struct drv_context *drvc = di->priv;
+ struct libusb_transfer *xfer_in, *xfer_out;
+ const struct libusb_pollfd **pfd;
+ struct timeval tv;
+ int ret, i;
+ unsigned char cmd[3], resp[4], *buf;
+
+ if (!di->priv) {
+ sr_err("Driver was not initialized.");
+ return SR_ERR;
+ }
+
+ devc = sdi->priv;
+ devc->cb_data = cb_data;
+
+ if (lascar_proc_config(sdi) != SR_OK)
+ return SR_ERR;
+
+ sr_dbg("Starting log retrieval.");
+
+ /* 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;
+ sr_session_send(devc->cb_data, &packet);
+
+ if (devc->logged_samples == 0) {
+ /* This ensures the frontend knows the session is done. */
+ packet.type = SR_DF_END;
+ sr_session_send(devc->cb_data, &packet);
+ return SR_OK;
+ }
+
+ if (!(xfer_in = libusb_alloc_transfer(0)) ||
+ !(xfer_out = libusb_alloc_transfer(0)))
+ return SR_ERR;
+
+ libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
+ 0x00, 0xffff, 0x00, NULL, 0, 50);
+ libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
+ 0x02, 0x0002, 0x00, NULL, 0, 50);
+ libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
+ 0x02, 0x0001, 0x00, NULL, 0, 50);
+
+
+ /* Flush input. The F321 requires this. */
+ while (libusb_bulk_transfer(devc->usb->devhdl, LASCAR_EP_IN, resp,
+ 256, &ret, 5) == 0 && ret > 0)
+ ;
+
+ libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
+ resp, sizeof(resp), mark_xfer, 0, 10000);
+ if (libusb_submit_transfer(xfer_in) != 0) {
+ libusb_free_transfer(xfer_in);
+ libusb_free_transfer(xfer_out);
+ return SR_ERR;
+ }
+
+ cmd[0] = 0x03;
+ cmd[1] = 0xff;
+ cmd[2] = 0xff;
+ libusb_fill_bulk_transfer(xfer_out, devc->usb->devhdl, LASCAR_EP_OUT,
+ cmd, 3, mark_xfer, 0, 100);
+ if (libusb_submit_transfer(xfer_out) != 0) {
+ libusb_free_transfer(xfer_in);
+ libusb_free_transfer(xfer_out);
+ return SR_ERR;
+ }
+
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ while (!xfer_in->user_data || !xfer_out->user_data) {
+ g_usleep(5000);
+ libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
+ }
+ if (xfer_in->user_data != GINT_TO_POINTER(1) ||
+ xfer_in->user_data != GINT_TO_POINTER(1)) {
+ sr_dbg("no response to log transfer request");
+ libusb_free_transfer(xfer_in);
+ libusb_free_transfer(xfer_out);
+ return SR_ERR;
+ }
+ if (xfer_in->actual_length != 3 || xfer_in->buffer[0] != 2) {
+ sr_dbg("invalid response to log transfer request");
+ libusb_free_transfer(xfer_in);
+ libusb_free_transfer(xfer_out);
+ return SR_ERR;
+ }
+ devc->log_size = xfer_in->buffer[1] + (xfer_in->buffer[2] << 8);
+ libusb_free_transfer(xfer_out);
+
+ pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
+ for (i = 0; pfd[i]; i++) {
+ /* Handle USB events every 100ms, for decent latency. */
+ sr_source_add(pfd[i]->fd, pfd[i]->events, 100,
+ lascar_el_usb_handle_events, (void *)sdi);
+ /* We'll need to remove this fd later. */
+ devc->usbfd[i] = pfd[i]->fd;
+ }
+ devc->usbfd[i] = -1;
+
+ buf = g_try_malloc(4096);
+ libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
+ buf, 4096, lascar_el_usb_receive_transfer, cb_data, 100);
+ if ((ret = libusb_submit_transfer(xfer_in) != 0)) {
+ sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
+ libusb_free_transfer(xfer_in);
+ g_free(buf);
+ return SR_ERR;
+ }
return SR_OK;
}
-static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
- void *cb_data)
+SR_PRIV int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
(void)cb_data;
+ if (!di->priv) {
+ sr_err("Driver was not initialized.");
+ return SR_ERR;
+ }
+
if (sdi->status != SR_ST_ACTIVE) {
sr_err("Device inactive, can't stop acquisition.");
return SR_ERR;
}
- /* TODO */
+ sdi->status = SR_ST_STOPPING;
+ /* TODO: free ongoing transfers? */
return SR_OK;
}
projects / libsigrok.git / blobdiff