#define USB_VENDOR_NAME "ASIX"
#define USB_MODEL_NAME "SIGMA"
#define USB_MODEL_VERSION ""
-#define FIRMWARE FIRMWARE_DIR "/asix-sigma-200.firmware"
static GSList *device_instances = NULL;
// XXX These should be per device
static struct ftdi_context ftdic;
-static uint64_t cur_samplerate = MHZ(200);
+static uint64_t cur_samplerate = 0;
static uint32_t limit_msec = 0;
static struct timeval start_tv;
+static int cur_firmware = -1;
+static int num_probes = 0;
+static int samples_per_event = 0;
static uint64_t supported_samplerates[] = {
+ KHZ(250),
+ MHZ(1),
+ MHZ(10),
+ MHZ(25),
+ MHZ(50),
+ MHZ(100),
MHZ(200),
0,
};
static struct samplerates samplerates = {
- MHZ(200),
+ KHZ(250),
MHZ(200),
0,
supported_samplerates,
0x2a, 0x3a, 0x40, 0x03, 0x20, 0x38,
};
-static int sigma_read(void *buf, size_t size)
+static const char *firmware_files[] =
+{
+ "asix-sigma-50.fw", /* 50 MHz, supports 8 bit fractions */
+ "asix-sigma-100.fw", /* 100 MHz */
+ "asix-sigma-200.fw", /* 200 MHz */
+ "asix-sigma-50sync.fw", /* Asynchronous sampling */
+ "asix-sigma-phasor.fw", /* Frequency counter */
+};
+
+static int sigma_read(void* buf, size_t size)
{
int ret;
return 1;
}
-static int hw_opendev(int device_index)
+static int upload_firmware(int firmware_idx)
{
int ret;
unsigned char *buf;
unsigned char pins;
size_t buf_size;
- struct sigrok_device_instance *sdi;
unsigned char result[32];
+ char firmware_path[128];
/* Make sure it's an ASIX SIGMA. */
if ((ret = ftdi_usb_open_desc(&ftdic,
break;
}
- /* Prepare firmware. */
- if (-1 == bin2bitbang(FIRMWARE, &buf, &buf_size)) {
+ /* Prepare firmware */
+ snprintf(firmware_path, sizeof(firmware_path), "%s/%s", FIRMWARE_DIR,
+ firmware_files[firmware_idx]);
+
+ if (-1 == bin2bitbang(firmware_path, &buf, &buf_size)) {
g_warning("An error occured while reading the firmware: %s",
- FIRMWARE);
+ firmware_path);
return SIGROK_ERR;
}
g_free(buf);
if ((ret = ftdi_set_bitmode(&ftdic, 0x00, BITMODE_RESET)) < 0) {
- g_warning("ftdi_set_bitmode failed: %s",
+ g_warning("ftdi_set_bitmode failed: %s",
ftdi_get_error_string(&ftdic));
return SIGROK_ERR;
}
return SIGROK_ERR;
}
- /* Works like a charm... */
+ cur_firmware = firmware_idx;
+
+ return SIGROK_OK;
+}
+
+static int hw_opendev(int device_index)
+{
+ struct sigrok_device_instance *sdi;
+ int ret;
+
+ /* Make sure it's an ASIX SIGMA */
+ if ((ret = ftdi_usb_open_desc(&ftdic,
+ USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
+
+ g_warning("ftdi_usb_open failed: %s",
+ ftdi_get_error_string(&ftdic));
+
+ return 0;
+ }
if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
return SIGROK_ERR;
sdi->status = ST_ACTIVE;
+ return SIGROK_OK;
+}
+
+static int set_samplerate(struct sigrok_device_instance *sdi, uint64_t samplerate)
+{
+ int i, ret;
+
+ sdi = sdi;
+
+ for (i = 0; supported_samplerates[i]; i++) {
+ if (supported_samplerates[i] == samplerate)
+ break;
+ }
+ if (supported_samplerates[i] == 0)
+ return SIGROK_ERR_SAMPLERATE;
+
+ if (samplerate <= MHZ(50)) {
+ ret = upload_firmware(0);
+ num_probes = 16;
+ // XXX: Setup divider if < 50 MHz
+ }
+ if (samplerate == MHZ(100)) {
+ ret = upload_firmware(1);
+ num_probes = 8;
+ }
+ else if (samplerate == MHZ(200)) {
+ ret = upload_firmware(2);
+ num_probes = 4;
+ }
+
+ cur_samplerate = samplerate;
+ samples_per_event = 16 / num_probes;
+
g_message("Firmware uploaded");
- return SIGROK_OK;
+ return ret;
}
static void hw_closedev(int device_index)
info = sdi;
break;
case DI_NUM_PROBES:
- info = GINT_TO_POINTER(4);
+ info = GINT_TO_POINTER(16);
break;
case DI_SAMPLERATES:
info = &samplerates;
{
struct sigrok_device_instance *sdi;
int ret;
- uint64_t *tmp_u64;
if (!(sdi = get_sigrok_device_instance(device_instances, device_index)))
return SIGROK_ERR;
if (capability == HWCAP_SAMPLERATE) {
- tmp_u64 = (uint64_t *) value;
- /* Only 200 MHz implemented */
- ret = SIGROK_OK;
+ ret = set_samplerate(sdi, *(uint64_t*) value);
} else if (capability == HWCAP_PROBECONFIG) {
ret = SIGROK_OK;
} else if (capability == HWCAP_LIMIT_MSEC) {
/*
* Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster.
* Each event is 20ns apart, and can contain multiple samples.
- * For 200 MHz, an event contains 4 samples for each channel,
- * spread 5 ns apart.
+ *
+ * For 200 MHz, events contain 4 samples for each channel, spread 5 ns apart.
+ * For 100 MHz, events contain 2 samples for each channel, spread 10 ns apart.
+ * For 50 MHz and below, events contain one sample for each channel,
+ * spread 20 ns apart.
*/
static int decode_chunk_ts(uint8_t *buf, uint16_t *lastts,
- uint8_t *lastsample, void *user_data)
+ uint16_t *lastsample, void *user_data)
{
- const int samples_per_event = 4;
uint16_t tsdiff, ts;
- uint8_t samples[65536 * samples_per_event];
+ uint16_t samples[65536 * samples_per_event];
struct datafeed_packet packet;
- int i, j, k, numpad, tosend;
+ int i, j, k, l, numpad, tosend;
size_t n = 0, sent = 0;
- int clustersize = EVENTS_PER_CLUSTER * samples_per_event; /* 4 for 200 MHz */
+ int clustersize = EVENTS_PER_CLUSTER * samples_per_event;
uint16_t *event;
+ uint16_t cur_sample;
/* For each ts */
for (i = 0; i < 64; ++i) {
/* Pad last sample up to current point. */
numpad = tsdiff * samples_per_event - clustersize;
if (numpad > 0) {
- memset(samples, *lastsample,
- tsdiff * samples_per_event - clustersize);
- n = tsdiff * samples_per_event - clustersize;
+ for (j = 0; j < numpad; ++j)
+ samples[j] = *lastsample;
+
+ n = numpad;
}
event = (uint16_t *) &buf[i * 16 + 2];
- /* For each sample in cluster. */
+ cur_sample = 0;
+
+ /* For each event in cluster. */
for (j = 0; j < 7; ++j) {
+
+ /* For each sample in event. */
for (k = 0; k < samples_per_event; ++k) {
- /*
- * Extract samples from bytestream.
- * Samples are packed together in a short.
- */
- samples[n++] =
- ((!!(event[j] & (1 << (k + 0x0)))) << 0) |
- ((!!(event[j] & (1 << (k + 0x4)))) << 1) |
- ((!!(event[j] & (1 << (k + 0x8)))) << 2) |
- ((!!(event[j] & (1 << (k + 0xc)))) << 3);
+ cur_sample = 0;
+
+ /* For each probe. */
+ for (l = 0; l < num_probes; ++l)
+ cur_sample |= (!!(event[j] & (1 << (l *
+ samples_per_event + k))))
+ << l;
+
+ samples[n++] = cur_sample;
}
}
/* Send to sigrok. */
sent = 0;
while (sent < n) {
- tosend = MIN(4096, n - sent);
+ tosend = MIN(2048, n - sent);
- packet.type = DF_LOGIC8;
- packet.length = tosend;
+ packet.type = DF_LOGIC16;
+ packet.length = tosend * sizeof(uint16_t);
packet.payload = samples + sent;
session_bus(user_data, &packet);
}
}
- return 0;
+ return SIGROK_OK;
}
static int receive_data(int fd, int revents, void *user_data)
uint32_t triggerpos, stoppos, running_msec;
struct timeval tv;
uint16_t lastts = 0;
- uint8_t lastsample = 0;
+ uint16_t lastsample = 0;
fd = fd;
revents = revents;
/* Get the current position. */
sigma_read_pos(&stoppos, &triggerpos);
+ /* Read mode status. We will care for this later. */
+ sigma_get_register(READ_MODE);
+
/* Download sample data. */
for (curchunk = 0; curchunk < numchunks;) {
newchunks = MIN(chunks_per_read, numchunks - curchunk);
device_index = device_index;
+ if (cur_firmware == -1) {
+ /* Samplerate has not been set. Default to 200 MHz */
+ set_samplerate(sdi, 200);
+ }
+
/* Setup trigger (by trigger-in). */
sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20);
/* Trigger normal (falling edge). */
sigma_set_register(WRITE_TRIGGER_SELECT1, 0x08);
- /* Enable pins (200 MHz, 4 pins). */
- sigma_set_register(WRITE_CLOCK_SELECT, 0xf0);
+ /* Set clock select register. */
+ if (cur_samplerate == MHZ(200))
+ /* Enable 4 probes. */
+ sigma_set_register(WRITE_CLOCK_SELECT, 0xf0);
+ else if (cur_samplerate == MHZ(100))
+ /* Enable 8 probes. */
+ sigma_set_register(WRITE_CLOCK_SELECT, 0x00);
+ else {
+ /*
+ * 50 MHz mode (or fraction thereof)
+ * Any fraction down to 50 MHz / 256 can be used,
+ * but is not suppoted by Sigrok API.
+ */
+
+ int frac = MHZ(50) / cur_samplerate - 1;
+
+ struct clockselect_50 clockselect = {
+ .async = 0,
+ .fraction = frac,
+ .disabled_probes = 0,
+ };
+
+ sigma_write_register(WRITE_CLOCK_SELECT,
+ (uint8_t *) &clockselect,
+ sizeof(clockselect));
+ }
+
/* Setup maximum post trigger time. */
sigma_set_register(WRITE_POST_TRIGGER, 0xff);
gettimeofday(&header.starttime, NULL);
header.samplerate = cur_samplerate;
header.protocol_id = PROTO_RAW;
- header.num_probes = 4;
+ header.num_probes = num_probes;
session_bus(session_device_id, &packet);
return SIGROK_OK;
projects / libsigrok.git / blobdiff