/*
* Receive and process QDA packets.
*
* Receive and process QDA packets, until the communication becomes idle (i.e.,
* no data is received for a certain amount of time).
*/
void qda_receive_loop()
{
int len;
do {
/*
* Receive a new packet using XMODEM.
*
* xmodem_receive() is blocking: the function returns when the
* XMODEM transfer is completed or an unrecoverable reception
* error occurs (e.g., a transmission starts, but then
* timeouts or the maximum number of retries is exceeded). The
* function returns the length of the received data on success,
* a negative error code otherwise.
*/
len = xmodem_receive_package(qda_buf, sizeof(qda_buf));
if (len > 0) {
qda_process_pkt(qda_buf, len);
}
/*
* NOTE: for this function to work properly, XMODEM must be
* changed to return a special value when the failure is due to
* a timeout and not an error.
*
* For now we do not distinguish between a timeout and an
* unrecoverable error.
*/
} while (len > 0);
}
/* called from QDA */
size_t dfu_util_qda_receive(uint8_t *data, size_t len)
{
int ret;
printd("QDA receive: (%d)\n", len);
ret = xmodem_receive_package(data, len);
return (ret==-1)?0:ret;
}
