X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Ffx2lafw%2Fprotocol.c;h=98b483c46e0d12106623d0412e51ffefab564601;hb=9615eeb572be5db9e770c0e343f80ab212335e3f;hp=45e7837c182c916c607af3569b4f1da86d0f950d;hpb=aeff7fa28622367115c3c8bdbd965c07dd536458;p=libsigrok.git diff --git a/hardware/fx2lafw/protocol.c b/hardware/fx2lafw/protocol.c index 45e7837c..98b483c4 100644 --- a/hardware/fx2lafw/protocol.c +++ b/hardware/fx2lafw/protocol.c @@ -297,58 +297,6 @@ SR_PRIV int fx2lafw_dev_open(struct sr_dev_inst *sdi, struct sr_dev_driver *di) return SR_OK; } -SR_PRIV int fx2lafw_configure_channels(const struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - struct sr_channel *ch; - GSList *l; - int channel_bit, stage, i; - char *tc; - - devc = sdi->priv; - for (i = 0; i < NUM_TRIGGER_STAGES; i++) { - devc->trigger_mask[i] = 0; - devc->trigger_value[i] = 0; - } - - stage = -1; - for (l = sdi->channels; l; l = l->next) { - ch = (struct sr_channel *)l->data; - if (ch->enabled == FALSE) - continue; - - if (ch->index > 7) - devc->sample_wide = TRUE; - - channel_bit = 1 << (ch->index); - if (!(ch->trigger)) - continue; - - stage = 0; - for (tc = ch->trigger; *tc; tc++) { - devc->trigger_mask[stage] |= channel_bit; - if (*tc == '1') - devc->trigger_value[stage] |= channel_bit; - stage++; - if (stage > NUM_TRIGGER_STAGES) - return SR_ERR; - } - } - - if (stage == -1) { - /* - * We didn't configure any triggers, make sure acquisition - * doesn't wait for any. - */ - devc->trigger_fired = TRUE; - } else { - devc->trigger_fired = FALSE; - devc->trigger_stage = 0; - } - - return SR_OK; -} - SR_PRIV struct dev_context *fx2lafw_dev_new(void) { struct dev_context *devc; @@ -396,10 +344,12 @@ static void finish_acquisition(struct dev_context *devc) static void free_transfer(struct libusb_transfer *transfer) { + struct sr_dev_inst *sdi; struct dev_context *devc; unsigned int i; - devc = transfer->user_data; + sdi = transfer->user_data; + devc = sdi->priv; g_free(transfer->buffer); transfer->buffer = NULL; @@ -424,24 +374,112 @@ static void resubmit_transfer(struct libusb_transfer *transfer) if ((ret = libusb_submit_transfer(transfer)) == LIBUSB_SUCCESS) return; + sr_err("%s: %s", __func__, libusb_error_name(ret)); free_transfer(transfer); - /* TODO: Stop session? */ - sr_err("%s: %s", __func__, libusb_error_name(ret)); +} + +static gboolean check_match(uint16_t sample, struct sr_trigger_match *match) +{ + gboolean bit, result; + + result = FALSE; + bit = sample & (1 << match->channel->index); + if (match->match == SR_TRIGGER_ZERO && !bit) + result = TRUE; + else if (match->match == SR_TRIGGER_ONE && bit) + result = TRUE; + + return result; +} + +/* Returns the offset (in samples) within buf of where the trigger + * occurred, or -1 if not triggered. */ +static int soft_trigger(struct sr_dev_inst *sdi, uint8_t *buf, + int len) +{ + struct dev_context *devc; + struct sr_datafeed_packet packet; + struct sr_trigger *trigger; + struct sr_trigger_stage *stage; + struct sr_trigger_match *match; + GSList *l, *lst;; + int offset; + uint16_t sample; + int unitsize, i; + gboolean match_found; + + devc = sdi->priv; + offset = -1; + trigger = sr_session_trigger_get(); + unitsize = devc->sample_wide ? 2 : 1; + for (i = 0; i < len; i += unitsize) { + memcpy(&sample, buf + i, unitsize); + + lst = g_slist_nth(trigger->stages, devc->cur_trigger_stage); + stage = lst->data; + if (!stage->matches) + /* No matches supplied, client error. */ + return SR_ERR_ARG; + + match_found = TRUE; + for (l = stage->matches; l; l = l->next) { + match = l->data; + if (!match->channel->enabled) + /* Ignore disabled channels with a trigger. */ + continue; + if (!check_match(sample, match)) { + match_found = FALSE; + break; + } + } + if (match_found) { + /* Matched on the current stage. */ + if (lst->next) { + /* Advance to next stage. */ + devc->cur_trigger_stage++; + } else { + /* Matched on last stage, fire trigger. */ + offset = i / unitsize; + + packet.type = SR_DF_TRIGGER; + packet.payload = NULL; + sr_session_send(devc->cb_data, &packet); + break; + } + } else if (devc->cur_trigger_stage > 0) { + /* + * We had a match at an earlier stage, but failed on the + * current stage. However, we may have a match on this + * stage in the next bit -- trigger on 0001 will fail on + * seeing 00001, so we need to go back to stage 0 -- but + * at the next sample from the one that matched originally, + * which the counter increment at the end of the loop + * takes care of. + */ + i -= devc->cur_trigger_stage * unitsize; + if (i < -1) + i = -1; /* Oops, went back past this buffer. */ + /* Reset trigger stage. */ + devc->cur_trigger_stage = 0; + } + } + + return offset; } SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer) { + struct sr_dev_inst *sdi; + struct dev_context *devc; gboolean packet_has_error = FALSE; struct sr_datafeed_packet packet; struct sr_datafeed_logic logic; - struct dev_context *devc; - unsigned int trigger_offset, num_samples; - int cur_sample_count, sample_width, i; - uint8_t *cur_buf; - uint16_t cur_sample; + unsigned int num_samples; + int trigger_offset, cur_sample_count, unitsize; - devc = transfer->user_data; + sdi = transfer->user_data; + devc = sdi->priv; /* * If acquisition has already ended, just free any queued up @@ -456,9 +494,8 @@ SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer) transfer->status, transfer->actual_length); /* Save incoming transfer before reusing the transfer struct. */ - cur_buf = transfer->buffer; - sample_width = devc->sample_wide ? 2 : 1; - cur_sample_count = transfer->actual_length / sample_width; + unitsize = devc->sample_wide ? 2 : 1; + cur_sample_count = transfer->actual_length / unitsize; switch (transfer->status) { case LIBUSB_TRANSFER_NO_DEVICE: @@ -490,88 +527,45 @@ SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer) devc->empty_transfer_count = 0; } - trigger_offset = 0; - if (!devc->trigger_fired) { - for (i = 0; i < cur_sample_count; i++) { - cur_sample = devc->sample_wide ? - *((uint16_t *)cur_buf + i) : - *((uint8_t *)cur_buf + i); - - if ((cur_sample & devc->trigger_mask[devc->trigger_stage]) == - devc->trigger_value[devc->trigger_stage]) { - /* Match on this trigger stage. */ - devc->trigger_buffer[devc->trigger_stage] = cur_sample; - devc->trigger_stage++; - - if (devc->trigger_stage == NUM_TRIGGER_STAGES || - devc->trigger_mask[devc->trigger_stage] == 0) { - /* Match on all trigger stages, we're done. */ - trigger_offset = i; - - /* - * TODO: Send pre-trigger buffer to session bus. - * Tell the frontend we hit the trigger here. - */ - packet.type = SR_DF_TRIGGER; - packet.payload = NULL; - sr_session_send(devc->cb_data, &packet); - - /* - * Send the samples that triggered it, - * since we're skipping past them. - */ - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - num_samples = cur_sample_count - trigger_offset; - if (devc->limit_samples && - num_samples > devc->limit_samples - devc->sent_samples) - num_samples = devc->limit_samples - devc->sent_samples; - logic.length = num_samples * sample_width; - logic.unitsize = sample_width; - logic.data = cur_buf + trigger_offset * sample_width; - sr_session_send(devc->cb_data, &packet); - devc->sent_samples += num_samples; - - devc->trigger_fired = TRUE; - break; - } - } else if (devc->trigger_stage > 0) { - /* - * We had a match before, but not in the next sample. However, we may - * have a match on this stage in the next bit -- trigger on 0001 will - * fail on seeing 00001, so we need to go back to stage 0 -- but at - * the next sample from the one that matched originally, which the - * counter increment at the end of the loop takes care of. - */ - i -= devc->trigger_stage; - if (i < -1) - i = -1; /* Oops, went back past this buffer. */ - /* Reset trigger stage. */ - devc->trigger_stage = 0; - } + if (devc->trigger_fired) { + if (devc->sent_samples < devc->limit_samples) { + /* Send the incoming transfer to the session bus. */ + packet.type = SR_DF_LOGIC; + packet.payload = &logic; + if (devc->sent_samples + cur_sample_count > devc->limit_samples) + num_samples = devc->limit_samples - devc->sent_samples; + else + num_samples = cur_sample_count; + logic.length = num_samples * unitsize; + logic.unitsize = unitsize; + logic.data = transfer->buffer; + sr_session_send(devc->cb_data, &packet); + devc->sent_samples += cur_sample_count; + } + } else { + trigger_offset = soft_trigger(sdi, transfer->buffer, transfer->actual_length); + if (trigger_offset > -1) { + packet.type = SR_DF_LOGIC; + packet.payload = &logic; + num_samples = cur_sample_count - trigger_offset; + if (devc->limit_samples && + num_samples > devc->limit_samples - devc->sent_samples) + num_samples = devc->limit_samples - devc->sent_samples; + logic.length = num_samples * unitsize; + logic.unitsize = unitsize; + logic.data = transfer->buffer + trigger_offset * unitsize; + sr_session_send(devc->cb_data, &packet); + devc->sent_samples += num_samples; + + devc->trigger_fired = TRUE; } - } else if (devc->sent_samples < devc->limit_samples) { - /* Send the incoming transfer to the session bus. */ - packet.type = SR_DF_LOGIC; - packet.payload = &logic; - if (devc->sent_samples + cur_sample_count > devc->limit_samples) - num_samples = devc->limit_samples - devc->sent_samples; - else - num_samples = cur_sample_count; - logic.length = num_samples * sample_width; - logic.unitsize = sample_width; - logic.data = cur_buf; - sr_session_send(devc->cb_data, &packet); - devc->sent_samples += cur_sample_count; } if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) { fx2lafw_abort_acquisition(devc); free_transfer(transfer); - return; - } - - resubmit_transfer(transfer); + } else + resubmit_transfer(transfer); } static unsigned int to_bytes_per_ms(unsigned int samplerate)