added example code for generating a stored pattern

diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c
index 86aadc4adae434d001e8f515d6476cd0079ff478..30484d081f002a1c0b28f30de1883fb901e40cbd 100644 (file)
--- a/hardware/demo/demo.c
+++ b/hardware/demo/demo.c
@@ -31,6 +31,7 @@
 #define BUFSIZE                4096
 
 enum {
+       GENMODE_DEFAULT,
        GENMODE_RANDOM,
        GENMODE_INC,
 };
@@ -61,11 +62,22 @@ static const char *patternmodes[] = {
        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(). */
 static GSList *device_instances = NULL;
 static uint64_t cur_samplerate = 0;
 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);
 
@@ -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)
 {
        struct databag *mydata = data;
-       uint64_t i;
+       uint64_t p, i;
 
        memset(buf, 0, size);
 
        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 */
                for (i = 0; i < size; i++)
                        *(buf + i) = (uint8_t)(rand() & 0xff);