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hackrf_transfer: made -n option compatible with -R (repeat TX mode).

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-n limits the total number of samples transferred via USB.
This fixes issue #192.
This commit is contained in:
Michael Ossmann
2017-01-25 15:32:25 -07:00
parent 103830b416
commit ba4ffbb1e4
1 changed files with 5 additions and 3 deletions
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8
host/hackrf-tools/src/hackrf_transfer.c
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@ -423,15 +423,17 @@ int tx_callback(hackrf_transfer* transfer) {
bytes_to_xfer -= bytes_to_read; bytes_to_xfer -= bytes_to_read;
} }
bytes_read = fread(transfer->buffer, 1, bytes_to_read, fd); bytes_read = fread(transfer->buffer, 1, bytes_to_read, fd);
if ((bytes_read != bytes_to_read) if (limit_num_samples && (bytes_to_xfer == 0)) {
|| (limit_num_samples && (bytes_to_xfer == 0))) { return -1;
}
if (bytes_read != bytes_to_read) {
if (repeat) { if (repeat) {
printf("Input file end reached. Rewind to beginning.\n"); printf("Input file end reached. Rewind to beginning.\n");
rewind(fd); rewind(fd);
fread(transfer->buffer + bytes_read, 1, bytes_to_read - bytes_read, fd); fread(transfer->buffer + bytes_read, 1, bytes_to_read - bytes_read, fd);
return 0; return 0;
} else { } else {
return -1; // not loopback mode, EOF return -1; /* not repeat mode, end of file */
} }
} else { } else {