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Pad the last data in a transmission to the next 512 byte boundary.

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This commit is contained in:
Martin Ling
2022-09-15 15:22:41 +01:00
parent 69823397b1
commit 1b166a5b05
1 changed files with 14 additions and 3 deletions
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17
host/libhackrf/src/hackrf.c
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@ -374,10 +374,17 @@ static int prepare_transfers(
// Now everything is ready, go ahead and submit the ready transfers. // Now everything is ready, go ahead and submit the ready transfers.
for (transfer_index = 0; transfer_index < ready_transfers; transfer_index++) { for (transfer_index = 0; transfer_index < ready_transfers; transfer_index++) {
device->transfers[transfer_index]->endpoint = endpoint_address; struct libusb_transfer* transfer = device->transfers[transfer_index];
device->transfers[transfer_index]->callback = callback; transfer->endpoint = endpoint_address;
transfer->callback = callback;
error = libusb_submit_transfer(device->transfers[transfer_index]); // Pad the size of a short transfer to the next 512-byte boundary.
if (endpoint_address == TX_ENDPOINT_ADDRESS) {
while (transfer->length % 512 != 0)
transfer->buffer[transfer->length++] = 0;
}
error = libusb_submit_transfer(transfer);
if (error != 0) { if (error != 0) {
last_libusb_error = error; last_libusb_error = error;
return HACKRF_ERROR_LIBUSB; return HACKRF_ERROR_LIBUSB;
@ -1805,6 +1812,10 @@ hackrf_libusb_transfer_callback(struct libusb_transfer* usb_transfer)
if ((resubmit = device->transfers_setup)) { if ((resubmit = device->transfers_setup)) {
if (usb_transfer->endpoint == TX_ENDPOINT_ADDRESS) { if (usb_transfer->endpoint == TX_ENDPOINT_ADDRESS) {
usb_transfer->length = transfer.valid_length; usb_transfer->length = transfer.valid_length;
// Pad to the next 512-byte boundary.
uint8_t* buffer = usb_transfer->buffer;
while (usb_transfer->length % 512 != 0)
buffer[usb_transfer->length++] = 0;
} }
result = libusb_submit_transfer(usb_transfer); result = libusb_submit_transfer(usb_transfer);
} }