uni-t-ut32x: Full acquisition support

[libsigrok.git] / hardware / uni-t-ut32x / api.c

diff --git a/hardware/uni-t-ut32x/api.c b/hardware/uni-t-ut32x/api.c
index f18435245c31f338c519e615765fc270578a63ba..f97adcda0a178632ad174fc07782349bc0cafca6 100644 (file)
--- a/hardware/uni-t-ut32x/api.c
+++ b/hardware/uni-t-ut32x/api.c
@@ -21,13 +21,6 @@
 
 #include <string.h>
 
-#define USB_CONN "1a86.e008"
-#define VENDOR "UNI-T"
-#define MODEL "UT32x"
-#define USB_INTERFACE 0
-#define EP_IN 0x80 | 2
-#define EP_OUT 2
-
 static const int32_t hwcaps[] = {
        SR_CONF_THERMOMETER,
        SR_CONF_LIMIT_SAMPLES,
@@ -153,8 +146,8 @@ static int dev_open(struct sr_dev_inst *sdi)
  * driver being active, but detaching it always returns an error.
  */
 #if !defined(__APPLE__)
-       if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
-               if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
+       if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
+               if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) {
                        sr_err("failed to detach kernel driver: %s",
                                        libusb_error_name(ret));
                        return SR_ERR;
@@ -162,7 +155,7 @@ static int dev_open(struct sr_dev_inst *sdi)
        }
 #endif
 
-       if ((ret = libusb_set_configuration(usb->devhdl, 1))) {
+       if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) {
                sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
                return SR_ERR;
        }
@@ -313,6 +306,18 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 
        devc->cb_data = cb_data;
        devc->num_samples = 0;
+       devc->packet_len = 0;
+
+       /* Configure serial port parameters on USB-UART interface
+        * chip inside the device (just baudrate 2400 actually). */
+       cmd[0] = 0x09;
+       cmd[1] = 0x60;
+       ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00,
+                       cmd, 2, 5);
+       if (ret != 2) {
+               sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret));
+               return SR_ERR;
+       }
 
        /* Send header packet to the session bus. */
        std_session_send_df_header(cb_data, LOG_PREFIX);
@@ -320,16 +325,6 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi,
        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++) {
-               /* Handle USB events every 10ms. */
-               sr_source_add(pfd[i]->fd, pfd[i]->events, 10,
-                               uni_t_ut32x_handle_events, (void *)sdi);
-               /* We'll need to remove this fd later. */
-               devc->usbfd[i] = pfd[i]->fd;
-       }
-       devc->usbfd[i] = -1;
-
        /* Length of payload to follow. */
        cmd[0] = 0x01;
        if (devc->data_source == DATA_SOURCE_LIVE)
@@ -345,23 +340,35 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi,
        }
 
        libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
-                       128, uni_t_ut32x_receive_transfer, (void *)sdi, 15);
+                       8, uni_t_ut32x_receive_transfer, (void *)sdi, 15);
        if (libusb_submit_transfer(devc->xfer) != 0) {
                libusb_free_transfer(devc->xfer);
                return SR_ERR;
        }
 
+       pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
+       for (i = 0; pfd[i]; i++) {
+               /* Handle USB events every 10ms. */
+               sr_source_add(pfd[i]->fd, pfd[i]->events, 10,
+                               uni_t_ut32x_handle_events, (void *)sdi);
+               /* We'll need to remove this fd later. */
+               devc->usbfd[i] = pfd[i]->fd;
+       }
+       devc->usbfd[i] = -1;
+
        return SR_OK;
 }
 
 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 {
+
        (void)cb_data;
 
        if (sdi->status != SR_ST_ACTIVE)
                return SR_ERR_DEV_CLOSED;
 
-       /* TODO: stop acquisition. */
+       /* Signal USB transfer handler to clean up and stop. */
+       sdi->status = SR_ST_STOPPING;
 
        return SR_OK;
 }