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added example code for generating a stored pattern

This commit is contained in:
Bert Vermeulen 2011-01-15 14:28:03 +01:00
parent 9be9893eed
commit 917e0e71d5
1 changed files with 22 additions and 2 deletions
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24
hardware/demo/demo.c
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@ -31,6 +31,7 @@
#define BUFSIZE 4096 #define BUFSIZE 4096
enum { enum {
GENMODE_DEFAULT,
GENMODE_RANDOM, GENMODE_RANDOM,
GENMODE_INC, GENMODE_INC,
}; };
@ -61,11 +62,22 @@ static const char *patternmodes[] = {
NULL, NULL,
}; };
static uint8_t genmode_default[] = {
0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00,
0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00,
0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00,
0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00,
0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00,
0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
/* List of struct sigrok_device_instance, maintained by opendev()/closedev(). */ /* List of struct sigrok_device_instance, maintained by opendev()/closedev(). */
static GSList *device_instances = NULL; static GSList *device_instances = NULL;
static uint64_t cur_samplerate = 0; static uint64_t cur_samplerate = 0;
static uint64_t limit_samples = -1; static uint64_t limit_samples = -1;
static int default_genmode = GENMODE_RANDOM; static int default_genmode = GENMODE_DEFAULT;
static void hw_stop_acquisition(int device_index, gpointer session_device_id); static void hw_stop_acquisition(int device_index, gpointer session_device_id);
@ -183,11 +195,19 @@ static int hw_set_configuration(int device_index, int capability, void *value)
static void samples_generator(uint8_t *buf, uint64_t size, void *data) static void samples_generator(uint8_t *buf, uint64_t size, void *data)
{ {
struct databag *mydata = data; struct databag *mydata = data;
uint64_t i; uint64_t p, i;
memset(buf, 0, size); memset(buf, 0, size);
switch (mydata->sample_generator) { switch (mydata->sample_generator) {
case GENMODE_DEFAULT:
p = 0;
for (i = 0; i < size; i++) {
*(buf + i) = ~(genmode_default[p] >> 1);
if (++p == 64)
p = 0;
}
break;
case GENMODE_RANDOM: /* Random */ case GENMODE_RANDOM: /* Random */
for (i = 0; i < size; i++) for (i = 0; i < size; i++)
*(buf + i) = (uint8_t)(rand() & 0xff); *(buf + i) = (uint8_t)(rand() & 0xff);