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fx2lafw: Don't send more samples than requested. 

It's the new law.
This commit is contained in:
Bert Vermeulen 2014-04-24 21:04:23 +02:00
parent b0ccd64d02
commit 06b5d7f70d
1 changed files with 17 additions and 25 deletions
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42
hardware/fx2lafw/protocol.c
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@ -431,8 +431,8 @@ SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
struct sr_datafeed_packet packet;
struct sr_datafeed_logic logic;
struct dev_context *devc;
int cur_sample_count, num_samples, trigger_offset, sample_width;
int i;
unsigned int trigger_offset, num_samples;
int cur_sample_count, sample_width, i;
uint8_t *cur_buf;
uint16_t cur_sample;
@ -501,7 +501,7 @@ SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
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 + 1;
trigger_offset = i;
/*
* TODO: Send pre-trigger buffer to session bus.
@ -517,13 +517,13 @@ SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
*/
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.unitsize = sample_width;
if (devc->trigger_stage > devc->limit_samples)
num_samples = devc->trigger_stage;
else
num_samples = devc->limit_samples;
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.data = devc->trigger_buffer;
logic.unitsize = sample_width;
logic.data = cur_buf + trigger_offset * sample_width;
sr_session_send(devc->cb_data, &packet);
devc->sent_samples += num_samples;
@ -545,9 +545,7 @@ SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
devc->trigger_stage = 0;
}
}
}
if (devc->trigger_fired) {
} else if (devc->sent_samples < devc->limit_samples) {
/* Send the incoming transfer to the session bus. */
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
@ -557,21 +555,15 @@ SR_PRIV void fx2lafw_receive_transfer(struct libusb_transfer *transfer)
num_samples = cur_sample_count;
logic.length = num_samples * sample_width;
logic.unitsize = sample_width;
logic.data = cur_buf + trigger_offset * sample_width;
logic.data = cur_buf;
sr_session_send(devc->cb_data, &packet);
devc->sent_samples += cur_sample_count;
if (devc->limit_samples &&
(unsigned int)devc->sent_samples > devc->limit_samples) {
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
return;
}
} else {
/*
* TODO: Buffer pre-trigger data in capture
* ratio-sized buffer.
*/
}
if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) {
fx2lafw_abort_acquisition(devc);
free_transfer(transfer);
return;
}
resubmit_transfer(transfer);