sysclk-lwla: Various cosmetic improvements

[libsigrok.git] / src / hardware / sysclk-lwla / protocol.c

diff --git a/src/hardware/sysclk-lwla/protocol.c b/src/hardware/sysclk-lwla/protocol.c
index 6c940ac253e17ce79f86799ba4ac065273bfb2de..a8d71b799c9cae57b9458a917425c1f637530cfd 100644 (file)
--- a/src/hardware/sysclk-lwla/protocol.c
+++ b/src/hardware/sysclk-lwla/protocol.c
@@ -19,12 +19,8 @@
 
 #include <config.h>
 #include <string.h>
-#include "lwla.h"
 #include "protocol.h"
-
-/* Status polling interval during acquisition.
- */
-#define POLL_INTERVAL 100 /* ms */
+#include "lwla.h"
 
 /* Submit an already filled-in USB transfer.
  */
@@ -341,7 +337,8 @@ static void LIBUSB_CALL transfer_out_completed(struct libusb_transfer *transfer)
        acq  = devc->acquisition;
 
        if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
-               sr_err("Transfer to device failed: %d.", transfer->status);
+               sr_err("Transfer to device failed (state %d): %s.",
+                      devc->state, libusb_error_name(transfer->status));
                devc->transfer_error = TRUE;
                return;
        }
@@ -549,6 +546,8 @@ SR_PRIV int lwla_start_acquisition(const struct sr_dev_inst *sdi)
        struct dev_context *devc;
        int ret;
 
+       const int poll_interval_ms = 100;
+
        drvc = sdi->driver->context;
        devc = sdi->priv;
 
@@ -570,7 +569,7 @@ SR_PRIV int lwla_start_acquisition(const struct sr_dev_inst *sdi)
                return ret;
        }
        /* Register event source for asynchronous USB I/O. */
-       ret = usb_source_add(sdi->session, drvc->sr_ctx, POLL_INTERVAL,
+       ret = usb_source_add(sdi->session, drvc->sr_ctx, poll_interval_ms,
                             &transfer_event, (struct sr_dev_inst *)sdi);
        if (ret != SR_OK) {
                clear_acquisition_state(sdi);