#define FPGA_FW_LA1016 "kingst-la1016-fpga.bitstream"
#define FPGA_FW_LA1016A "kingst-la1016a1-fpga.bitstream"
+/* Maximum device capabilities. May differ between models. */
#define MAX_SAMPLE_RATE_LA2016 SR_MHZ(200)
#define MAX_SAMPLE_RATE_LA1016 SR_MHZ(100)
#define MAX_SAMPLE_DEPTH 10e9
#define MAX_PWM_FREQ SR_MHZ(20)
#define PWM_CLOCK SR_MHZ(200) /* 200MHz for both LA2016 and LA1016 */
+/*
+ * Default device configuration. Must be applicable to any of the
+ * supported devices (no model specific default values yet). Specific
+ * firmware implementation details unfortunately won't let us detect
+ * and keep using previously configured values.
+ */
+#define LA2016_DFLT_SAMPLERATE SR_MHZ(100)
+#define LA2016_DFLT_SAMPLEDEPTH (5 * 1000 * 1000)
+#define LA2016_DFLT_CAPT_RATIO 5 /* Capture ratio, in percent. */
+
+/* TODO
+ * What is the origin and motivation of that 128Mi literal? What is its
+ * unit? How does it relate to a device's hardware capabilities? How to
+ * map the 1GiB of RAM of an LA2016 (at 16 channels) to the 128Mi value?
+ * It cannot be sample count. Is it memory size in bytes perhaps?
+ */
+#define LA2016_PRE_MEM_LIMIT_BASE (128 * 1024 * 1024)
+
/* USB vendor class control requests, executed by the Cypress FX2 MCU. */
#define CMD_FPGA_ENABLE 0x10
#define CMD_FPGA_SPI 0x20 /* R/W access to FPGA registers via SPI. */
* CMD_FPGA_SPI requests. The FX2 MCU transparently handles the detail
* of SPI transfers encoding the read (1) or write (0) direction in the
* MSB of the address field. There are some 60 byte-wide FPGA registers.
+ *
+ * Unfortunately the FPGA registers change their meaning between the
+ * read and write directions of access, or exclusively provide one of
+ * these directions and not the other. This is an arbitrary vendor's
+ * choice, there is nothing which the sigrok driver could do about it.
+ * Values written to registers typically cannot get read back, neither
+ * verified after writing a configuration, nor queried upon startup for
+ * automatic detection of the current configuration. Neither appear to
+ * be there echo registers for presence and communication checks, nor
+ * version identifying registers, as far as we know.
*/
#define REG_RUN 0x00 /* Read capture status, write start capture. */
#define REG_PWM_EN 0x02 /* User PWM channels on/off. */
#define REG_PWM1 0x70 /* Write config for user PWM1. */
#define REG_PWM2 0x78 /* Write config for user PWM2. */
+/* Bit patterns to write to REG_RUN, setup run mode. */
+#define RUNMODE_HALT 0x00
+#define RUNMODE_RUN 0x03
+
static int ctrl_in(const struct sr_dev_inst *sdi,
- uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
- void *data, uint16_t wLength)
+ uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
+ void *data, uint16_t wLength)
{
struct sr_usb_dev_inst *usb;
int ret;
usb = sdi->conn;
- if ((ret = libusb_control_transfer(
- usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
+ if ((ret = libusb_control_transfer(usb->devhdl,
+ LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN,
bRequest, wValue, wIndex, (unsigned char *)data, wLength,
DEFAULT_TIMEOUT_MS)) != wLength) {
sr_dbg("USB ctrl in: %d bytes, req %d val %#x idx %d: %s.",
}
static int ctrl_out(const struct sr_dev_inst *sdi,
- uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
- void *data, uint16_t wLength)
+ uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
+ void *data, uint16_t wLength)
{
struct sr_usb_dev_inst *usb;
int ret;
usb = sdi->conn;
- if ((ret = libusb_control_transfer(
- usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT,
+ if ((ret = libusb_control_transfer(usb->devhdl,
+ LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT,
bRequest, wValue, wIndex, (unsigned char*)data, wLength,
DEFAULT_TIMEOUT_MS)) != wLength) {
sr_dbg("USB ctrl out: %d bytes, req %d val %#x idx %d: %s.",
return SR_OK;
}
-static int upload_fpga_bitstream(const struct sr_dev_inst *sdi, const char *bitstream_fname)
+/*
+ * Check the necessity for FPGA bitstream upload, because another upload
+ * would take some 600ms which is undesirable after program startup. Try
+ * to access some FPGA registers and check the values' plausibility. The
+ * check should fail on the safe side, request another upload when in
+ * doubt. A positive response (the request to continue operation with the
+ * currently active bitstream) should be conservative. Accessing multiple
+ * registers is considered cheap compared to the cost of bitstream upload.
+ *
+ * It helps though that both the vendor software and the sigrok driver
+ * use the same bundle of MCU firmware and FPGA bitstream for any of the
+ * supported models. We don't expect to successfully communicate to the
+ * device yet disagree on its protocol. Ideally we would access version
+ * identifying registers for improved robustness, but are not aware of
+ * any. A bitstream reload can always be forced by a power cycle.
+ */
+static int check_fpga_bitstream(const struct sr_dev_inst *sdi)
+{
+ uint8_t init_rsp;
+ int ret;
+ uint16_t run_state;
+ uint8_t pwm_en;
+ size_t read_len;
+ uint8_t buff[sizeof(run_state)];
+ const uint8_t *rdptr;
+
+ sr_dbg("Checking operation of the FPGA bitstream.");
+
+ init_rsp = ~0;
+ ret = ctrl_in(sdi, CMD_FPGA_INIT, 0x00, 0, &init_rsp, sizeof(init_rsp));
+ if (ret != SR_OK || init_rsp != 0) {
+ sr_dbg("FPGA init query failed, or unexpected response.");
+ return SR_ERR_IO;
+ }
+
+ read_len = sizeof(run_state);
+ ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_RUN, 0, buff, read_len);
+ if (ret != SR_OK) {
+ sr_dbg("FPGA register access failed (run state).");
+ return SR_ERR_IO;
+ }
+ rdptr = buff;
+ run_state = read_u16le_inc(&rdptr);
+ sr_spew("FPGA register: run state 0x%04x.", run_state);
+ if (run_state && (run_state & 0x3) != 0x1) {
+ sr_dbg("Unexpected FPGA register content (run state).");
+ return SR_ERR_DATA;
+ }
+ if (run_state && (run_state & ~0xf) != 0x85e0) {
+ sr_dbg("Unexpected FPGA register content (run state).");
+ return SR_ERR_DATA;
+ }
+
+ read_len = sizeof(pwm_en);
+ ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_PWM_EN, 0, buff, read_len);
+ if (ret != SR_OK) {
+ sr_dbg("FPGA register access failed (PWM enable).");
+ return SR_ERR_IO;
+ }
+ rdptr = buff;
+ pwm_en = read_u8_inc(&rdptr);
+ sr_spew("FPGA register: PWM enable 0x%02x.", pwm_en);
+ if ((pwm_en & 0x3) != 0x0) {
+ sr_dbg("Unexpected FPGA register content (PWM enable).");
+ return SR_ERR_DATA;
+ }
+
+ sr_info("Could re-use current FPGA bitstream. No upload required.");
+ return SR_OK;
+}
+
+static int upload_fpga_bitstream(const struct sr_dev_inst *sdi,
+ const char *bitstream_fname)
{
- struct dev_context *devc;
struct drv_context *drvc;
struct sr_usb_dev_inst *usb;
struct sr_resource bitstream;
+ uint32_t bitstream_size;
uint8_t buffer[sizeof(uint32_t)];
uint8_t *wrptr;
- uint8_t cmd_resp;
uint8_t block[4096];
int len, act_len;
unsigned int pos;
int ret;
- unsigned int zero_pad_to = 0x2c000;
+ unsigned int zero_pad_to;
- devc = sdi->priv;
drvc = sdi->driver->context;
usb = sdi->conn;
return ret;
}
- devc->bitstream_size = (uint32_t)bitstream.size;
+ bitstream_size = (uint32_t)bitstream.size;
wrptr = buffer;
- write_u32le_inc(&wrptr, devc->bitstream_size);
+ write_u32le_inc(&wrptr, bitstream_size);
if ((ret = ctrl_out(sdi, CMD_FPGA_INIT, 0x00, 0, buffer, wrptr - buffer)) != SR_OK) {
sr_err("Cannot initiate FPGA bitstream upload.");
sr_resource_close(drvc->sr_ctx, &bitstream);
return ret;
}
+ zero_pad_to = bitstream_size;
+ zero_pad_to += LA2016_EP2_PADDING - 1;
+ zero_pad_to /= LA2016_EP2_PADDING;
+ zero_pad_to *= LA2016_EP2_PADDING;
pos = 0;
while (1) {
if (len == 0)
break;
- ret = libusb_bulk_transfer(usb->devhdl, 2, (unsigned char*)&block[0], len, &act_len, DEFAULT_TIMEOUT_MS);
+ ret = libusb_bulk_transfer(usb->devhdl, USB_EP_FPGA_BITSTREAM,
+ &block[0], len, &act_len, DEFAULT_TIMEOUT_MS);
if (ret != 0) {
sr_dbg("Cannot write FPGA bitstream, block %#x len %d: %s.",
pos, (int)len, libusb_error_name(ret));
sr_info("FPGA bitstream upload (%" PRIu64 " bytes) done.",
bitstream.size);
+ return SR_OK;
+}
+
+static int enable_fpga_bitstream(const struct sr_dev_inst *sdi)
+{
+ int ret;
+ uint8_t cmd_resp;
+
if ((ret = ctrl_in(sdi, CMD_FPGA_INIT, 0x00, 0, &cmd_resp, sizeof(cmd_resp))) != SR_OK) {
sr_err("Cannot read response after FPGA bitstream upload.");
return ret;
cmd_resp);
return SR_ERR;
}
-
- g_usleep(30000);
+ g_usleep(30 * 1000);
if ((ret = ctrl_out(sdi, CMD_FPGA_ENABLE, 0x01, 0, NULL, 0)) != SR_OK) {
sr_err("Cannot enable FPGA after bitstream upload.");
return ret;
}
+ g_usleep(40 * 1000);
- g_usleep(40000);
return SR_OK;
}
devc = sdi->priv;
- uint16_t duty_R79,duty_R56;
+ uint16_t duty_R79, duty_R56;
uint8_t buf[2 * sizeof(uint16_t)];
uint8_t *wrptr;
/* Clamp threshold setting to valid range for LA2016. */
if (voltage > 4.0) {
voltage = 4.0;
- }
- else if (voltage < -4.0) {
+ } else if (voltage < -4.0) {
voltage = -4.0;
}
if (voltage >= 2.9) {
duty_R79 = 0; /* PWM off (0V). */
duty_R56 = (uint16_t)(302 * voltage - 363);
- }
- else if (voltage <= -0.4) {
- duty_R79 = 0x02d7; /* 72% duty cycle. */
- duty_R56 = (uint16_t)(302 * voltage + 1090);
- }
- else {
+ } else if (voltage > -0.4) {
duty_R79 = 0x00f2; /* 25% duty cycle. */
duty_R56 = (uint16_t)(302 * voltage + 121);
+ } else {
+ duty_R79 = 0x02d7; /* 72% duty cycle. */
+ duty_R56 = (uint16_t)(302 * voltage + 1090);
}
/* Clamp duty register values to sensible limits. */
if (duty_R56 < 10) {
duty_R56 = 10;
- }
- else if (duty_R56 > 1100) {
+ } else if (duty_R56 > 1100) {
duty_R56 = 1100;
}
return SR_OK;
}
-static int set_pwm(const struct sr_dev_inst *sdi, uint8_t which, float freq, float duty)
+static int set_pwm(const struct sr_dev_inst *sdi, uint8_t which,
+ float freq, float duty)
{
int CTRL_PWM[] = { REG_PWM1, REG_PWM2 };
struct dev_context *devc;
devc = sdi->priv;
- if (which < 1 || which > 2) {
+ if (which < 1 || which > ARRAY_SIZE(CTRL_PWM)) {
sr_err("Invalid PWM channel: %d.", which);
return SR_ERR;
}
devc = sdi->priv;
- devc->capture_ratio = 5; /* percent */
+ devc->capture_ratio = LA2016_DFLT_CAPT_RATIO;
devc->cur_channels = 0xffff;
- devc->limit_samples = 5000000;
- devc->cur_samplerate = SR_MHZ(100);
+ devc->limit_samples = LA2016_DFLT_SAMPLEDEPTH;
+ devc->cur_samplerate = LA2016_DFLT_SAMPLERATE;
ret = set_threshold_voltage(sdi, devc->threshold_voltage);
if (ret)
if (ret)
return ret;
- ret = set_pwm(sdi, 1, 1e3, 50);
+ ret = set_pwm(sdi, 1, SR_KHZ(1), 50);
if (ret)
return ret;
- ret = set_pwm(sdi, 2, 100e3, 50);
+ ret = set_pwm(sdi, 2, SR_KHZ(100), 50);
if (ret)
return ret;
write_u32le_inc(&wrptr, cfg.enabled);
write_u32le_inc(&wrptr, cfg.level);
write_u32le_inc(&wrptr, cfg.high_or_falling);
+ /* TODO
+ * Comment on this literal 16. Origin, meaning? Cannot be the
+ * register offset, nor the transfer length. Is it a channels
+ * count that is relevant for 16 and 32 channel models? Is it
+ * an obsolete experiment?
+ */
ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_TRIGGER, 16, buf, wrptr - buf);
if (ret != SR_OK) {
sr_err("Cannot setup trigger configuration.");
{
struct dev_context *devc;
double clock_divisor;
- uint64_t total;
- int ret;
- uint16_t divisor;
- uint8_t buf[2 * sizeof(uint32_t) + 48 / 8 + sizeof(uint16_t)];
+ uint16_t divider_u16;
+ uint64_t pre_trigger_samples;
+ uint64_t pre_trigger_memory;
+ uint8_t buf[REG_TRIGGER - REG_SAMPLING]; /* Width of REG_SAMPLING. */
uint8_t *wrptr;
+ int ret;
devc = sdi->priv;
- total = 128 * 1024 * 1024;
if (devc->cur_samplerate > devc->max_samplerate) {
sr_err("Too high a sample rate: %" PRIu64 ".",
}
clock_divisor = devc->max_samplerate / (double)devc->cur_samplerate;
- if (clock_divisor > 0xffff)
- clock_divisor = 0xffff;
- divisor = (uint16_t)(clock_divisor + 0.5);
- devc->cur_samplerate = devc->max_samplerate / divisor;
+ if (clock_divisor > 65535)
+ return SR_ERR_ARG;
+ divider_u16 = (uint16_t)(clock_divisor + 0.5);
+ devc->cur_samplerate = devc->max_samplerate / divider_u16;
if (devc->limit_samples > MAX_SAMPLE_DEPTH) {
sr_err("Too high a sample depth: %" PRIu64 ".",
return SR_ERR;
}
- devc->pre_trigger_size = (devc->capture_ratio * devc->limit_samples) / 100;
+ /*
+ * The acquisition configuration communicates "pre-trigger"
+ * specs in several formats. sigrok users provide a percentage
+ * (0-100%), which translates to a pre-trigger samples count
+ * (assuming that a total samples count limit was specified).
+ * The device supports hardware compression, which depends on
+ * slowly changing input data to be effective. Fast changing
+ * input data may occupy more space in sample memory than its
+ * uncompressed form would. This is why a third parameter can
+ * limit the amount of sample memory to use for pre-trigger
+ * data. Only the upper 24 bits of that memory size spec get
+ * communicated to the device (written to its FPGA register).
+ */
+ pre_trigger_samples = devc->limit_samples * devc->capture_ratio / 100;
+ pre_trigger_memory = LA2016_PRE_MEM_LIMIT_BASE;
+ pre_trigger_memory *= devc->capture_ratio;
+ pre_trigger_memory /= 100;
- sr_dbg("Set sample config: %" PRIu64 "kHz, %" PRIu64 " samples, trigger-pos %" PRIu64 "%%.",
- devc->cur_samplerate / 1000,
- devc->limit_samples,
- devc->capture_ratio);
+ sr_dbg("Set sample config: %" PRIu64 "kHz, %" PRIu64 " samples.",
+ devc->cur_samplerate / 1000, devc->limit_samples);
+ sr_dbg("Capture ratio %" PRIu64 "%%, count %" PRIu64 ", mem %" PRIu64 ".",
+ devc->capture_ratio, pre_trigger_samples, pre_trigger_memory);
+ /*
+ * The acquisition configuration occupies a total of 16 bytes:
+ * - A 34bit total samples count limit (up to 10 billions) that
+ * is kept in a 40bit register.
+ * - A 34bit pre-trigger samples count limit (up to 10 billions)
+ * in another 40bit register.
+ * - A 32bit pre-trigger memory space limit (in bytes) of which
+ * the upper 24bits are kept in an FPGA register.
+ * - A 16bit clock divider which gets applied to the maximum
+ * samplerate of the device.
+ * - An 8bit register of unknown meaning. Currently always 0.
+ */
wrptr = buf;
- write_u32le_inc(&wrptr, devc->limit_samples);
- write_u8_inc(&wrptr, 0);
- write_u32le_inc(&wrptr, devc->pre_trigger_size);
- write_u32le_inc(&wrptr, ((total * devc->capture_ratio) / 100) & 0xffffff00);
- write_u16le_inc(&wrptr, divisor);
+ write_u40le_inc(&wrptr, devc->limit_samples);
+ write_u40le_inc(&wrptr, pre_trigger_samples);
+ write_u24le_inc(&wrptr, pre_trigger_memory >> 8);
+ write_u16le_inc(&wrptr, divider_u16);
write_u8_inc(&wrptr, 0);
-
ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_SAMPLING, 0, buf, wrptr - buf);
if (ret != SR_OK) {
sr_err("Cannot setup acquisition configuration.");
*/
static uint16_t run_state(const struct sr_dev_inst *sdi)
{
- uint16_t state;
- static uint16_t previous_state = 0;
+ static uint16_t previous_state;
+
int ret;
+ uint16_t state;
+ uint8_t buff[sizeof(state)];
+ const uint8_t *rdptr;
+ const char *label;
- if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_RUN, 0, &state, sizeof(state))) != SR_OK) {
+ if ((ret = ctrl_in(sdi, CMD_FPGA_SPI, REG_RUN, 0, buff, sizeof(state))) != SR_OK) {
sr_err("Cannot read run state.");
return ret;
}
+ rdptr = buff;
+ state = read_u16le_inc(&rdptr);
/*
* Avoid flooding the log, only dump values as they change.
*/
if (state != previous_state) {
previous_state = state;
- if ((state & 0x0003) == 0x01) {
- sr_dbg("Run state: 0x%04x (%s).", state, "idle");
- }
- else if ((state & 0x000f) == 0x02) {
- sr_dbg("Run state: 0x%04x (%s).", state,
- "pre-trigger sampling");
- }
- else if ((state & 0x000f) == 0x0a) {
- sr_dbg("Run state: 0x%04x (%s).", state,
- "sampling, waiting for trigger");
- }
- else if ((state & 0x000f) == 0x0e) {
- sr_dbg("Run state: 0x%04x (%s).", state,
- "post-trigger sampling");
+ if ((state & 0x3) == 0x1) {
+ label = "idle";
+ } else if ((state & 0xf) == 0x2) {
+ label = "pre-trigger sampling";
+ } else if ((state & 0xf) == 0xa) {
+ label = "sampling, waiting for trigger";
+ } else if ((state & 0xf) == 0xe) {
+ label = "post-trigger sampling";
+ } else {
+ label = NULL;
}
- else {
+ if (label && *label) {
+ sr_dbg("Run state: 0x%04x (%s).", state, label);
+ } else {
sr_dbg("Run state: 0x%04x.", state);
}
}
return state;
}
-static int set_run_mode(const struct sr_dev_inst *sdi, uint8_t fast_blinking)
+static int la2016_has_triggered(const struct sr_dev_inst *sdi)
+{
+ uint16_t state;
+
+ state = run_state(sdi);
+ if ((state & 0x3) == 0x1)
+ return 1;
+
+ return 0;
+}
+
+static int set_run_mode(const struct sr_dev_inst *sdi, uint8_t mode)
{
int ret;
- if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_RUN, 0, &fast_blinking, sizeof(fast_blinking))) != SR_OK) {
- sr_err("Cannot configure run mode %d.", fast_blinking);
+ if ((ret = ctrl_out(sdi, CMD_FPGA_SPI, REG_RUN, 0, &mode, sizeof(mode))) != SR_OK) {
+ sr_err("Cannot configure run mode %d.", mode);
return ret;
}
devc->info.write_pos = read_u32le_inc(&rdptr);
sr_dbg("Capture info: n_rep_packets: 0x%08x/%d, before_trigger: 0x%08x/%d, write_pos: 0x%08x%d.",
- devc->info.n_rep_packets, devc->info.n_rep_packets,
- devc->info.n_rep_packets_before_trigger,
- devc->info.n_rep_packets_before_trigger,
- devc->info.write_pos, devc->info.write_pos);
-
- if (devc->info.n_rep_packets % 5) {
- sr_warn("Unexpected packets count %lu, not a multiple of 5.",
- (unsigned long)devc->info.n_rep_packets);
+ devc->info.n_rep_packets, devc->info.n_rep_packets,
+ devc->info.n_rep_packets_before_trigger,
+ devc->info.n_rep_packets_before_trigger,
+ devc->info.write_pos, devc->info.write_pos);
+
+ if (devc->info.n_rep_packets % NUM_PACKETS_IN_CHUNK) {
+ sr_warn("Unexpected packets count %lu, not a multiple of %d.",
+ (unsigned long)devc->info.n_rep_packets,
+ NUM_PACKETS_IN_CHUNK);
}
return SR_OK;
}
-SR_PRIV int la2016_upload_firmware(struct sr_context *sr_ctx, libusb_device *dev, uint16_t product_id)
+SR_PRIV int la2016_upload_firmware(struct sr_context *sr_ctx,
+ libusb_device *dev, uint16_t product_id)
{
char fw_file[1024];
snprintf(fw_file, sizeof(fw_file) - 1, UC_FIRMWARE, product_id);
{
int ret;
- ret = set_run_mode(sdi, 3);
+ ret = set_run_mode(sdi, RUNMODE_RUN);
if (ret != SR_OK)
return ret;
{
int ret;
- ret = set_run_mode(sdi, 0);
+ ret = set_run_mode(sdi, RUNMODE_HALT);
if (ret != SR_OK)
return ret;
return SR_OK;
}
-static int la2016_has_triggered(const struct sr_dev_inst *sdi)
-{
- uint16_t state;
-
- state = run_state(sdi);
-
- return (state & 0x3) == 1;
-}
-
-static int la2016_start_retrieval(const struct sr_dev_inst *sdi, libusb_transfer_cb_fn cb)
+static int la2016_start_retrieval(const struct sr_dev_inst *sdi,
+ libusb_transfer_cb_fn cb)
{
struct dev_context *devc;
struct sr_usb_dev_inst *usb;
devc->n_reps_until_trigger = devc->info.n_rep_packets_before_trigger;
sr_dbg("Want to read %u xfer-packets starting from pos %" PRIu32 ".",
- devc->n_transfer_packets_to_read, devc->read_pos);
+ devc->n_transfer_packets_to_read, devc->read_pos);
if ((ret = ctrl_out(sdi, CMD_BULK_RESET, 0x00, 0, NULL, 0)) != SR_OK) {
sr_err("Cannot reset USB bulk state.");
}
devc->transfer = libusb_alloc_transfer(0);
- libusb_fill_bulk_transfer(
- devc->transfer, usb->devhdl,
- 0x86, buffer, to_read,
+ libusb_fill_bulk_transfer(devc->transfer,
+ usb->devhdl, USB_EP_CAPTURE_DATA | LIBUSB_ENDPOINT_IN,
+ buffer, to_read,
cb, (void *)sdi, DEFAULT_TIMEOUT_MS);
if ((ret = libusb_submit_transfer(devc->transfer)) != 0) {
unsigned int max_samples, n_samples, total_samples, free_n_samples;
unsigned int i, j, k;
int do_signal_trigger;
- uint16_t *wp;
+ uint8_t *wp;
const uint8_t *rp;
uint16_t state;
uint8_t repetitions;
+ uint8_t sample_buff[sizeof(state)];
devc = sdi->priv;
- logic.unitsize = 2;
+ logic.unitsize = sizeof(sample_buff);
logic.data = devc->convbuffer;
sr_packet.type = SR_DF_LOGIC;
sr_packet.payload = &logic;
- max_samples = devc->convbuffer_size / 2;
+ max_samples = devc->convbuffer_size / sizeof(sample_buff);
n_samples = 0;
- wp = (uint16_t *)devc->convbuffer;
+ wp = devc->convbuffer;
total_samples = 0;
do_signal_trigger = 0;
logic.length = n_samples * 2;
sr_session_send(sdi, &sr_packet);
n_samples = 0;
- wp = (uint16_t *)devc->convbuffer;
+ wp = devc->convbuffer;
if (do_signal_trigger) {
std_session_send_df_trigger(sdi);
do_signal_trigger = 0;
state = read_u16le_inc(&rp);
repetitions = read_u8_inc(&rp);
- for (j = 0; j < repetitions; j++)
- *wp++ = state;
+ write_u16le((void *)&sample_buff, state);
+ for (j = 0; j < repetitions; j++) {
+ memcpy(wp, sample_buff, logic.unitsize);
+ wp += logic.unitsize;
+ }
n_samples += repetitions;
total_samples += repetitions;
devc->reading_behind_trigger = 1;
do_signal_trigger = 1;
sr_dbg("Trigger position after %" PRIu64 " samples, %.6fms.",
- devc->total_samples,
- (double)devc->total_samples / devc->cur_samplerate * 1e3);
+ devc->total_samples,
+ (double)devc->total_samples / devc->cur_samplerate * 1e3);
}
}
}
(void)read_u8_inc(&rp); /* Skip sequence number. */
}
if (n_samples) {
- logic.length = n_samples * 2;
+ logic.length = n_samples * logic.unitsize;
sr_session_send(sdi, &sr_packet);
if (do_signal_trigger) {
std_session_send_df_trigger(sdi);
usb = sdi->conn;
sr_dbg("receive_transfer(): status %s received %d bytes.",
- libusb_error_name(transfer->status), transfer->actual_length);
+ libusb_error_name(transfer->status), transfer->actual_length);
if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT) {
sr_err("USB bulk transfer timeout.");
to_read = LA2016_USB_BUFSZ;
else
to_read = (to_read + (LA2016_EP6_PKTSZ-1)) & ~(LA2016_EP6_PKTSZ-1);
- libusb_fill_bulk_transfer(
- transfer, usb->devhdl,
- 0x86, transfer->buffer, to_read,
+ libusb_fill_bulk_transfer(transfer,
+ usb->devhdl, USB_EP_CAPTURE_DATA | LIBUSB_ENDPOINT_IN,
+ transfer->buffer, to_read,
receive_transfer, (void *)sdi, DEFAULT_TIMEOUT_MS);
if ((ret = libusb_submit_transfer(transfer)) == 0)
struct dev_context *devc;
uint16_t state;
uint8_t buf[8];
- int16_t purchase_date_bcd[2];
+ const uint8_t *rdptr;
+ uint8_t date_yy, date_mm;
+ uint8_t dinv_yy, dinv_mm;
uint8_t magic;
+ const char *bitstream_fn;
int ret;
devc = sdi->priv;
/*
- * Four EEPROM bytes at offset 0x20 are purchase year and month
- * in BCD format, with 16bit complemented checksum. For example
- * 20 04 df fb translates to 2020-04. This can help identify the
- * age of devices when unknown magic numbers are seen.
+ * Four EEPROM bytes at offset 0x20 are the manufacturing date,
+ * year and month in BCD format, followed by inverted values for
+ * consistency checks. For example bytes 20 04 df fb translate
+ * to 2020-04. This information can help identify the vintage of
+ * devices when unknown magic numbers are seen.
*/
- if ((ret = ctrl_in(sdi, CMD_EEPROM, 0x20, 0, purchase_date_bcd, sizeof(purchase_date_bcd))) != SR_OK) {
- sr_err("Cannot read purchase date in EEPROM.");
- }
- else {
- sr_dbg("Purchase date: 20%02hx-%02hx.",
- (purchase_date_bcd[0]) & 0xff,
- (purchase_date_bcd[0] >> 8) & 0xff);
- if (purchase_date_bcd[0] != (0x0ffff & ~purchase_date_bcd[1])) {
- sr_err("Purchase date fails checksum test.");
- }
+ ret = ctrl_in(sdi, CMD_EEPROM, 0x20, 0, buf, 4 * sizeof(uint8_t));
+ if (ret != SR_OK) {
+ sr_err("Cannot read manufacture date in EEPROM.");
+ } else {
+ rdptr = &buf[0];
+ date_yy = read_u8_inc(&rdptr);
+ date_mm = read_u8_inc(&rdptr);
+ dinv_yy = read_u8_inc(&rdptr);
+ dinv_mm = read_u8_inc(&rdptr);
+ sr_info("Manufacture date: 20%02hx-%02hx.", date_yy, date_mm);
+ if ((date_mm ^ dinv_mm) != 0xff || (date_yy ^ dinv_yy) != 0xff)
+ sr_warn("Manufacture date fails checksum test.");
}
/*
sr_err("Cannot read EEPROM device identifier bytes.");
return ret;
}
-
- magic = 0;
- if (buf[0] == (0xff & ~buf[1])) {
+ if ((buf[0] ^ buf[1]) == 0xff) {
/* Primary copy of magic passes complement check. */
+ sr_dbg("Using primary copy of device type magic number.");
magic = buf[0];
- }
- else if (buf[4] == (0x0ff & ~buf[5])) {
+ } else if ((buf[4] ^ buf[5]) == 0xff) {
/* Backup copy of magic passes complement check. */
sr_dbg("Using backup copy of device type magic number.");
magic = buf[4];
+ } else {
+ sr_err("Cannot find consistent device type identification.");
+ magic = 0;
}
-
sr_dbg("Device type: magic number is %hhu.", magic);
/* Select the FPGA bitstream depending on the model. */
switch (magic) {
case 2:
- ret = upload_fpga_bitstream(sdi, FPGA_FW_LA2016);
+ bitstream_fn = FPGA_FW_LA2016;
devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
break;
case 3:
- ret = upload_fpga_bitstream(sdi, FPGA_FW_LA1016);
+ bitstream_fn = FPGA_FW_LA1016;
devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
break;
case 8:
- ret = upload_fpga_bitstream(sdi, FPGA_FW_LA2016A);
+ bitstream_fn = FPGA_FW_LA2016A;
devc->max_samplerate = MAX_SAMPLE_RATE_LA2016;
break;
case 9:
- ret = upload_fpga_bitstream(sdi, FPGA_FW_LA1016A);
+ bitstream_fn = FPGA_FW_LA1016A;
devc->max_samplerate = MAX_SAMPLE_RATE_LA1016;
break;
default:
+ bitstream_fn = NULL;
+ break;
+ }
+ if (!bitstream_fn || !*bitstream_fn) {
sr_err("Cannot identify as one of the supported models.");
return SR_ERR;
}
+ if (check_fpga_bitstream(sdi) != SR_OK) {
+ ret = upload_fpga_bitstream(sdi, bitstream_fn);
+ if (ret != SR_OK) {
+ sr_err("Cannot upload FPGA bitstream.");
+ return ret;
+ }
+ }
+ ret = enable_fpga_bitstream(sdi);
if (ret != SR_OK) {
- sr_err("Cannot upload FPGA bitstream.");
+ sr_err("Cannot enable FPGA bitstream after upload.");
return ret;
}
sr_dbg("Device should be initialized.");
- return set_defaults(sdi);
+ ret = set_defaults(sdi);
+ if (ret != SR_OK)
+ return ret;
+
+ return SR_OK;
}
SR_PRIV int la2016_deinit_device(const struct sr_dev_inst *sdi)