Allow reading from the cooked endpoint as well as the raw one.
Signed-off-by: Keith Packard <keithp@keithp.com>
\-l length | --length length
Set the amount of data to read. Suffixes 'k', 'M' and 'G' are
supported. The default is 1k.
\-l length | --length length
Set the amount of data to read. Suffixes 'k', 'M' and 'G' are
supported. The default is 1k.
+.TP
+\-i | --infinite
+Read an unlimited amount of data.
+.TP
+\-b | --bytes
+For each 16-bit value read, output bits 1-8 as a byte, don't output
+bit 0 or bits 9-15 at all.
+.TP
+\-c | --cooked
+Read whitened data from the device. The default is to read raw data
+from the noise source.
+.TP
+\-r | --raw
+Read raw data from the noise source. This is the default.
.SH USAGE
.I ao-chaosread
reads noise data.
.SH USAGE
.I ao-chaosread
reads noise data.
+#define COOKED_ENDPOINT 0x85
+#define RAW_ENDPOINT 0x86
-chaoskey_read(struct chaoskey *ck, void *buffer, int len)
+chaoskey_read(struct chaoskey *ck, int endpoint, void *buffer, int len)
{
uint8_t *buf = buffer;
int total = 0;
{
uint8_t *buf = buffer;
int total = 0;
int ret;
int transferred;
int ret;
int transferred;
- ret = libusb_bulk_transfer(ck->handle, ENDPOINT, buf, len, &transferred, 10000);
+ ret = libusb_bulk_transfer(ck->handle, endpoint, buf, len, &transferred, 10000);
if (ret) {
if (total)
return total;
if (ret) {
if (total)
return total;
{ .name = "length", .has_arg = 1, .val = 'l' },
{ .name = "infinite", .has_arg = 0, .val = 'i' },
{ .name = "bytes", .has_arg = 0, .val = 'b' },
{ .name = "length", .has_arg = 1, .val = 'l' },
{ .name = "infinite", .has_arg = 0, .val = 'i' },
{ .name = "bytes", .has_arg = 0, .val = 'b' },
+ { .name = "cooked", .has_arg = 0, .val = 'c' },
+ { .name = "raw", .has_arg = 0, .val = 'r' },
{ 0, 0, 0, 0},
};
static void usage(char *program)
{
{ 0, 0, 0, 0},
};
static void usage(char *program)
{
- fprintf(stderr, "usage: %s [--serial=<serial>] [--length=<length>[kMG]] [--infinite] [--bytes]\n", program);
+ fprintf(stderr, "usage: %s [--serial=<serial>] [--length=<length>[kMG]] [--infinite] [--bytes] [--cooked] [--raw]\n", program);
int this_time;
int infinite = 0;
int bytes = 0;
int this_time;
int infinite = 0;
int bytes = 0;
+ int endpoint = RAW_ENDPOINT;
- while ((c = getopt_long(argc, argv, "s:l:ib", options, NULL)) != -1) {
+ while ((c = getopt_long(argc, argv, "s:l:ibcr", options, NULL)) != -1) {
switch (c) {
case 's':
serial = optarg;
switch (c) {
case 's':
serial = optarg;
case 'b':
bytes = 1;
break;
case 'b':
bytes = 1;
break;
+ case 'c':
+ endpoint = COOKED_ENDPOINT;
+ break;
+ case 'r':
+ endpoint = RAW_ENDPOINT;
+ break;
default:
usage(argv[0]);
break;
default:
usage(argv[0]);
break;
this_time = sizeof(buf);
if (!infinite && length < sizeof(buf))
this_time = (int) length;
this_time = sizeof(buf);
if (!infinite && length < sizeof(buf))
this_time = (int) length;
- got = chaoskey_read(ck, buf, this_time);
+ got = chaoskey_read(ck, endpoint, buf, this_time);
if (got < 0) {
perror("read");
exit(1);
if (got < 0) {
perror("read");
exit(1);