Rework audio driver

1 files changed, 7 insertions, 3 deletions

diff --git a/src/device/usbd.c b/src/device/usbd.c
index 4e18df757..2e2f9cf65 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -1206,12 +1206,16 @@ bool usbd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
   }
 }
 
-bool usbd_edpt_iso_xfer(uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff)
+// The number of bytes has to be given explicitly to allow more flexible control of how many
+// bytes should be written and second to keep the return value free to give back a boolean
+// success message. If total_bytes is too big, the FIFO will copy only what is available
+// into the USB buffer!
+bool usbd_edpt_iso_xfer(uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16_t total_bytes)
 {
   uint8_t const epnum = tu_edpt_number(ep_addr);
   uint8_t const dir   = tu_edpt_dir(ep_addr);
 
-  TU_LOG2("  Queue ISO EP %02X with %u bytes ... ", ep_addr, tu_fifo_count(ff));
+  TU_LOG2("  Queue ISO EP %02X with %u bytes ... ", ep_addr, count);
 
   // Attempt to transfer on a busy endpoint, sound like an race condition !
   TU_ASSERT(_usbd_dev.ep_status[epnum][dir].busy == 0);
@@ -1220,7 +1224,7 @@ bool usbd_edpt_iso_xfer(uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff)
   // and usbd task can preempt and clear the busy
   _usbd_dev.ep_status[epnum][dir].busy = true;
 
-  if ( dcd_edpt_iso_xfer(rhport, ep_addr, ff) )
+  if (dcd_edpt_iso_xfer(rhport, ep_addr, ff, total_bytes))
   {
     TU_LOG2("OK\r\n");
     return true;