struct context {
unsigned int num_enabled_channels;
- unsigned int unitsize;
- uint64_t trigger_point;
+ gboolean triggered;
uint64_t samplerate;
+ uint64_t samplecount;
+ int *channel_index;
+ GString *pretrig_buf;
};
/**
*
* @return 1 if the samplerate is supported/valid, 0 otherwise.
*/
-static int is_valid_samplerate(uint64_t samplerate)
+static gboolean is_valid_samplerate(uint64_t samplerate)
{
unsigned int i;
for (i = 0; i < 255; i++) {
if (samplerate == (SR_MHZ(100) / (i + 1)))
- return 1;
+ return TRUE;
}
- sr_warn("%s: invalid samplerate (%" PRIu64 "Hz)",
- __func__, samplerate);
-
- return 0;
+ return FALSE;
}
/**
*/
static uint8_t samplerate_to_divcount(uint64_t samplerate)
{
- if (samplerate == 0) {
- sr_warn("%s: samplerate was 0", __func__);
- return 0xff;
- }
-
- if (!is_valid_samplerate(samplerate)) {
- sr_warn("%s: can't get divcount, samplerate invalid", __func__);
+ if (samplerate == 0 || !is_valid_samplerate(samplerate)) {
+ sr_warn("Invalid samplerate (%" PRIu64 "Hz)", samplerate);
return 0xff;
}
struct context *ctx;
struct sr_channel *ch;
GSList *l;
- GVariant *gvar;
- if (!o) {
- sr_warn("%s: o was NULL", __func__);
+ if (!o || !o->sdi)
return SR_ERR_ARG;
- }
-
- if (!o->sdi) {
- sr_warn("%s: o->sdi was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
- sr_warn("%s: ctx malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
+ ctx = g_malloc0(sizeof(struct context));
o->internal = ctx;
- /* Get the unitsize. */
for (l = o->sdi->channels; l; l = l->next) {
ch = l->data;
if (ch->type != SR_CHANNEL_LOGIC)
continue;
ctx->num_enabled_channels++;
}
- ctx->unitsize = (ctx->num_enabled_channels + 7) / 8;
-
- if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
- &gvar) == SR_OK) {
- ctx->samplerate = g_variant_get_uint64(gvar);
- g_variant_unref(gvar);
- } else
- ctx->samplerate = 0;
+ ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels);
+ ctx->pretrig_buf = g_string_sized_new(1024);
return SR_OK;
}
-static int event(struct sr_output *o, int event_type, uint8_t **data_out,
- uint64_t *length_out)
+static int receive(struct sr_output *o, const struct sr_dev_inst *sdi,
+ const struct sr_datafeed_packet *packet, GString **out)
{
+ const struct sr_datafeed_logic *logic;
struct context *ctx;
- uint8_t *outbuf;
+ GVariant *gvar;
+ uint64_t samplerate;
+ gchar c[4];
- if (!o) {
- sr_warn("%s: o was NULL", __func__);
- return SR_ERR_ARG;
- }
+ (void)sdi;
- if (!(ctx = o->internal)) {
- sr_warn("%s: o->internal was NULL", __func__);
+ *out = NULL;
+ if (!o || !o->sdi)
return SR_ERR_ARG;
- }
-
- if (!data_out) {
- sr_warn("%s: data_out was NULL", __func__);
+ if (!(ctx = o->internal))
return SR_ERR_ARG;
- }
- switch (event_type) {
+ switch (packet->type) {
+ case SR_DF_HEADER:
+ /* One byte for the 'divcount' value. */
+ if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
+ &gvar) == SR_OK) {
+ samplerate = g_variant_get_uint64(gvar);
+ g_variant_unref(gvar);
+ } else
+ samplerate = 0;
+ c[0] = samplerate_to_divcount(samplerate);
+ *out = g_string_new_len(c, 1);
+ ctx->triggered = FALSE;
+ break;
case SR_DF_TRIGGER:
- sr_dbg("%s: SR_DF_TRIGGER event", __func__);
- /* Save the trigger point for later (SR_DF_END). */
- ctx->trigger_point = 0; /* TODO: Store _actual_ value. */
+ /* Four bytes (little endian) for the trigger point. */
+ c[0] = ctx->samplecount & 0xff;
+ c[1] = (ctx->samplecount >> 8) & 0xff;
+ c[2] = (ctx->samplecount >> 16) & 0xff;
+ c[3] = (ctx->samplecount >> 24) & 0xff;
+ *out = g_string_new_len(c, 4);
+ /* Flush the pre-trigger buffer. */
+ if (ctx->pretrig_buf->len)
+ g_string_append_len(*out, ctx->pretrig_buf->str,
+ ctx->pretrig_buf->len);
+ ctx->triggered = TRUE;
+ break;
+ case SR_DF_LOGIC:
+ logic = packet->payload;
+ if (!ctx->triggered)
+ g_string_append_len(ctx->pretrig_buf, logic->data, logic->length);
+ else
+ *out = g_string_new_len(logic->data, logic->length);
+ ctx->samplecount += logic->length / logic->unitsize;
break;
case SR_DF_END:
- sr_dbg("%s: SR_DF_END event", __func__);
- if (!(outbuf = g_try_malloc(4 + 1))) {
- sr_warn("la8 out: %s: outbuf malloc failed", __func__);
- return SR_ERR_MALLOC;
+ if (!ctx->triggered && ctx->pretrig_buf->len) {
+ /* We never got a trigger, submit an empty one. */
+ *out = g_string_sized_new(ctx->pretrig_buf->len + 4);
+ g_string_append_len(*out, "\x00\x00\x00\x00", 4);
+ g_string_append_len(*out, ctx->pretrig_buf->str, ctx->pretrig_buf->len);
}
-
- /* One byte for the 'divcount' value. */
- outbuf[0] = samplerate_to_divcount(ctx->samplerate);
- // if (outbuf[0] == 0xff) {
- // sr_warn("%s: invalid divcount", __func__);
- // return SR_ERR;
- // }
-
- /* Four bytes (little endian) for the trigger point. */
- outbuf[1] = (ctx->trigger_point >> 0) & 0xff;
- outbuf[2] = (ctx->trigger_point >> 8) & 0xff;
- outbuf[3] = (ctx->trigger_point >> 16) & 0xff;
- outbuf[4] = (ctx->trigger_point >> 24) & 0xff;
-
- *data_out = outbuf;
- *length_out = 4 + 1;
- g_free(o->internal);
- o->internal = NULL;
- break;
- default:
- sr_warn("%s: unsupported event type: %d", __func__,
- event_type);
- *data_out = NULL;
- *length_out = 0;
break;
}
return SR_OK;
}
-static int data(struct sr_output *o, const uint8_t *data_in,
- uint64_t length_in, uint8_t **data_out, uint64_t *length_out)
+static int cleanup(struct sr_output *o)
{
struct context *ctx;
- uint8_t *outbuf;
- if (!o) {
- sr_warn("%s: o was NULL", __func__);
+ if (!o || !o->sdi)
return SR_ERR_ARG;
- }
- if (!(ctx = o->internal)) {
- sr_warn("%s: o->internal was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!data_in) {
- sr_warn("%s: data_in was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!(outbuf = g_try_malloc0(length_in))) {
- sr_warn("%s: outbuf malloc failed", __func__);
- return SR_ERR_MALLOC;
+ if (o->internal) {
+ ctx = o->internal;
+ g_string_free(ctx->pretrig_buf, TRUE);
+ g_free(ctx->channel_index);
+ g_free(o->internal);
+ o->internal = NULL;
}
- memcpy(outbuf, data_in, length_in);
-
- *data_out = outbuf;
- *length_out = length_in;
-
return SR_OK;
}
.description = "ChronoVu LA8",
.df_type = SR_DF_LOGIC,
.init = init,
- .data = data,
- .event = event,
+ .receive = receive,
+ .cleanup = cleanup,
};
projects / libsigrok.git / blobdiff