This fork re-enables FRDM boards and adds WebUSB CDC functionality
Fork of USBDevice_STM32F103 by
Diff: USBDevice/USBDevice.cpp
- Revision:
- 28:c09a0c9bf425
- Parent:
- 26:8ef73dd868a0
- Child:
- 38:dfe51ad5cacf
diff -r 0c6524151939 -r c09a0c9bf425 USBDevice/USBDevice.cpp --- a/USBDevice/USBDevice.cpp Wed Jun 18 09:00:48 2014 +0100 +++ b/USBDevice/USBDevice.cpp Tue Aug 05 20:15:19 2014 +0100 @@ -187,7 +187,27 @@ /* Check we should be transferring data OUT */ if (transfer.direction != HOST_TO_DEVICE) { - return false; +#if defined(TARGET_KL25Z) | defined(TARGET_KL46Z) | defined(TARGET_K20D5M) | defined(TARGET_K64F) + /* + * We seem to have a pending device-to-host transfer. The host must have + * sent a new control request without waiting for us to finish processing + * the previous one. This appears to happen when we're connected to certain + * USB 3.0 host chip set. Do a zeor-length send to tell the host we're not + * ready for the new request - that'll make it resend - and then just + * pretend we were successful here so that the pending transfer can finish. + */ + uint8_t buf[1] = { 0 }; + EP0write(buf, 0); + + /* execute our pending ttransfer */ + controlIn(); + + /* indicate success */ + return true; + #else + /* for other platforms, count on the HAL to handle this case */ + return false; + #endif } /* Read from endpoint */