int cmd_rx_data(struct libusb_device_handle* devh) {
empty_usb_buf =(u8 *) malloc(BUFFER_SIZE);
rx_xfer = libusb_alloc_transfer(0);
libusb_fill_bulk_transfer(rx_xfer, devh, DATA_IN, empty_usb_buf,
BUFFER_SIZE, cb_xfer, NULL, TIMEOUT);
cmd_rx_syms(devh, num_blocks);
r = libusb_submit_transfer(rx_xfer);
if (r < 0) {
fprintf(stderr, "rx_xfer submission: %d\n", r);
return -1;
}
while (1) {
while (!usb_really_full) {
handle_events_wrapper();
}
/* process each received block */
for (i = 0; i < xfer_blocks; i++) {
rx = (usb_pkt_rx *)(full_usb_buf + PKT_LEN * i);
if(rx->pkt_type != KEEP_ALIVE)
(*cb)(cb_args, rx, bank);
bank = (bank + 1) % NUM_BANKS;
}
usb_really_full = 0;
}
}
int stream_rx_usb(struct libusb_device_handle* devh, int xfer_size,
uint16_t num_blocks, rx_callback cb, void* cb_args)
{
int r;
int i;
int xfer_blocks;
int num_xfers;
usb_pkt_rx* rx;
uint8_t bank = 0;
uint8_t rx_buf1[BUFFER_SIZE];
uint8_t rx_buf2[BUFFER_SIZE];
/*
* A block is 64 bytes transferred over USB (includes 50 bytes of rx symbol
* payload). A transfer consists of one or more blocks. Consecutive
* blocks should be approximately 400 microseconds apart (timestamps about
* 4000 apart in units of 100 nanoseconds).
*/
if (xfer_size > BUFFER_SIZE)
xfer_size = BUFFER_SIZE;
xfer_blocks = xfer_size / PKT_LEN;
xfer_size = xfer_blocks * PKT_LEN;
num_xfers = num_blocks / xfer_blocks;
num_blocks = num_xfers * xfer_blocks;
/*
fprintf(stderr, "rx %d blocks of 64 bytes in %d byte transfers\n",
num_blocks, xfer_size);
*/
empty_usb_buf = &rx_buf1[0];
full_usb_buf = &rx_buf2[0];
usb_really_full = 0;
rx_xfer = libusb_alloc_transfer(0);
libusb_fill_bulk_transfer(rx_xfer, devh, DATA_IN, empty_usb_buf,
xfer_size, cb_xfer, NULL, TIMEOUT);
cmd_rx_syms(devh, num_blocks);
r = libusb_submit_transfer(rx_xfer);
if (r < 0) {
fprintf(stderr, "rx_xfer submission: %d\n", r);
return -1;
}
while (1) {
while (!usb_really_full) {
handle_events_wrapper();
}
/* process each received block */
for (i = 0; i < xfer_blocks; i++) {
rx = (usb_pkt_rx *)(full_usb_buf + PKT_LEN * i);
if(rx->pkt_type != KEEP_ALIVE)
(*cb)(cb_args, rx, bank);
bank = (bank + 1) % NUM_BANKS;
if(stop_ubertooth) {
stop_ubertooth = 0;
usb_really_full = 0;
usb_retry = 0;
handle_events_wrapper();
usb_retry = 1;
return 1;
}
}
usb_really_full = 0;
fflush(stderr);
}
}
