#include "protocol.h"
+#define USB_VENDOR_ID 0x0403
+#define USB_DEVICE_ID 0x6014
+#define USB_VENDOR_NAME "Ikalogic"
+#define USB_MODEL_NAME "ScanaPLUS"
+#define USB_IPRODUCT "SCANAPLUS"
+
+#define SAMPLE_BUF_SIZE (8 * 1024 * 1024)
+
+static const int32_t hwcaps[] = {
+ SR_CONF_LOGIC_ANALYZER,
+ SR_CONF_SAMPLERATE,
+ SR_CONF_LIMIT_MSEC,
+ SR_CONF_LIMIT_SAMPLES,
+ SR_CONF_CONTINUOUS, // TODO?
+};
+
+/* Probes are numbered 1-9. */
+static const char *probe_names[] = {
+ "1", "2", "3", "4", "5", "6", "7", "8", "9",
+ NULL,
+};
+
+/* Note: The Ikalogic ScanaPLUS always samples at 100MHz. */
+static uint64_t samplerates[1] = { SR_MHZ(100) };
+
SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info;
static struct sr_dev_driver *di = &ikalogic_scanaplus_driver_info;
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
+
+static void clear_helper(void *priv)
+{
+ struct dev_context *devc;
+
+ devc = priv;
+
+ ftdi_free(devc->ftdic);
+ g_free(devc->compressed_buf);
+ g_free(devc->sample_buf);
+}
+
+static int dev_clear(void)
+{
+ return std_dev_clear(di, clear_helper);
+}
+
static int init(struct sr_context *sr_ctx)
{
- return std_hw_init(sr_ctx, di, LOG_PREFIX);
+ return std_init(sr_ctx, di, LOG_PREFIX);
}
static GSList *scan(GSList *options)
{
+ struct sr_dev_inst *sdi;
+ struct sr_probe *probe;
struct drv_context *drvc;
+ struct dev_context *devc;
GSList *devices;
+ unsigned int i;
+ int ret;
(void)options;
- devices = NULL;
drvc = di->priv;
- drvc->instances = NULL;
+
+ devices = NULL;
+
+ /* Allocate memory for our private device context. */
+ if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
+ sr_err("Device context malloc failed.");
+ goto err_free_nothing;
+ }
+
+ /* Allocate memory for the incoming compressed samples. */
+ if (!(devc->compressed_buf = g_try_malloc0(COMPRESSED_BUF_SIZE))) {
+ sr_err("compressed_buf malloc failed.");
+ goto err_free_devc;
+ }
+
+ /* Allocate memory for the uncompressed samples. */
+ if (!(devc->sample_buf = g_try_malloc0(SAMPLE_BUF_SIZE))) {
+ sr_err("sample_buf malloc failed.");
+ goto err_free_compressed_buf;
+ }
+
+ /* Allocate memory for the FTDI context (ftdic) and initialize it. */
+ if (!(devc->ftdic = ftdi_new())) {
+ sr_err("Failed to initialize libftdi.");
+ goto err_free_sample_buf;
+ }
+
+ /* Check for the device and temporarily open it. */
+ ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
+ USB_IPRODUCT, NULL);
+ if (ret < 0) {
+ /* Log errors, except for -3 ("device not found"). */
+ if (ret != -3)
+ sr_err("Failed to open device (%d): %s", ret,
+ ftdi_get_error_string(devc->ftdic));
+ goto err_free_ftdic;
+ }
+
+ /* Register the device with libsigrok. */
+ sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
+ USB_VENDOR_NAME, USB_MODEL_NAME, NULL);
+ if (!sdi) {
+ sr_err("Failed to create device instance.");
+ goto err_close_ftdic;
+ }
+ sdi->driver = di;
+ sdi->priv = devc;
+
+ for (i = 0; probe_names[i]; i++) {
+ if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
+ probe_names[i])))
+ return NULL;
+ sdi->probes = g_slist_append(sdi->probes, probe);
+ }
+
+ devices = g_slist_append(devices, sdi);
+ drvc->instances = g_slist_append(drvc->instances, sdi);
+
+ /* Close device. We'll reopen it again when we need it. */
+ scanaplus_close(devc);
return devices;
+
+err_close_ftdic:
+ scanaplus_close(devc);
+err_free_ftdic:
+ ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
+err_free_sample_buf:
+ g_free(devc->sample_buf);
+err_free_compressed_buf:
+ g_free(devc->compressed_buf);
+err_free_devc:
+ g_free(devc);
+err_free_nothing:
+
+ return NULL;
}
static GSList *dev_list(void)
return ((struct drv_context *)(di->priv))->instances;
}
-static int dev_clear(void)
-{
- return std_dev_clear(di, NULL);
-}
-
static int dev_open(struct sr_dev_inst *sdi)
{
- (void)sdi;
+ struct dev_context *devc;
+ int ret;
+
+ devc = sdi->priv;
+
+ /* Select interface A, otherwise communication will fail. */
+ ret = ftdi_set_interface(devc->ftdic, INTERFACE_A);
+ if (ret < 0) {
+ sr_err("Failed to set FTDI interface A (%d): %s", ret,
+ ftdi_get_error_string(devc->ftdic));
+ return SR_ERR;
+ }
+ sr_dbg("FTDI chip interface A set successfully.");
+
+ /* Open the device. */
+ ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID, USB_DEVICE_ID,
+ USB_IPRODUCT, NULL);
+ if (ret < 0) {
+ sr_err("Failed to open device (%d): %s", ret,
+ ftdi_get_error_string(devc->ftdic));
+ return SR_ERR;
+ }
+ sr_dbg("FTDI device opened successfully.");
+
+ /* Purge RX/TX buffers in the FTDI chip. */
+ if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
+ sr_err("Failed to purge FTDI RX/TX buffers (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_dev_open_close_ftdic;
+ }
+ sr_dbg("FTDI chip buffers purged successfully.");
+
+ /* Reset the FTDI bitmode. */
+ ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_RESET);
+ if (ret < 0) {
+ sr_err("Failed to reset the FTDI chip bitmode (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_dev_open_close_ftdic;
+ }
+ sr_dbg("FTDI chip bitmode reset successfully.");
+
+ /* Set FTDI bitmode to "sync FIFO". */
+ ret = ftdi_set_bitmode(devc->ftdic, 0xff, BITMODE_SYNCFF);
+ if (ret < 0) {
+ sr_err("Failed to put FTDI chip into sync FIFO mode (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_dev_open_close_ftdic;
+ }
+ sr_dbg("FTDI chip sync FIFO mode entered successfully.");
+
+ /* Set the FTDI latency timer to 2. */
+ ret = ftdi_set_latency_timer(devc->ftdic, 2);
+ if (ret < 0) {
+ sr_err("Failed to set FTDI latency timer (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_dev_open_close_ftdic;
+ }
+ sr_dbg("FTDI chip latency timer set successfully.");
+
+ /* Set the FTDI read data chunk size to 64kB. */
+ ret = ftdi_read_data_set_chunksize(devc->ftdic, 64 * 1024);
+ if (ret < 0) {
+ sr_err("Failed to set FTDI read data chunk size (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_dev_open_close_ftdic;
+ }
+ sr_dbg("FTDI chip read data chunk size set successfully.");
+
+ /* Get the ScanaPLUS device ID from the FTDI EEPROM. */
+ if ((ret = scanaplus_get_device_id(devc)) < 0) {
+ sr_err("Failed to get ScanaPLUS device ID: %d.", ret);
+ goto err_dev_open_close_ftdic;
+ }
+ sr_dbg("Received ScanaPLUS device ID successfully: %02x %02x %02x.",
+ devc->devid[0], devc->devid[1], devc->devid[2]);
sdi->status = SR_ST_ACTIVE;
return SR_OK;
+
+err_dev_open_close_ftdic:
+ scanaplus_close(devc);
+ return SR_ERR;
}
static int dev_close(struct sr_dev_inst *sdi)
{
- (void)sdi;
+ int ret;
+ struct dev_context *devc;
+
+ ret = SR_OK;
+ devc = sdi->priv;
+
+ if (sdi->status == SR_ST_ACTIVE) {
+ sr_dbg("Status ACTIVE, closing device.");
+ ret = scanaplus_close(devc);
+ } else {
+ sr_spew("Status not ACTIVE, nothing to do.");
+ }
sdi->status = SR_ST_INACTIVE;
- return SR_OK;
+ return ret;
}
static int cleanup(void)
return dev_clear();
}
-static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
+static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
{
- int ret;
-
(void)sdi;
- (void)data;
- ret = SR_OK;
- switch (key) {
+ switch (id) {
+ case SR_CONF_SAMPLERATE:
+ /* The ScanaPLUS samplerate is 100MHz and can't be changed. */
+ *data = g_variant_new_uint64(SR_MHZ(100));
+ break;
default:
return SR_ERR_NA;
}
- return ret;
+ return SR_OK;
}
-static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
+static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
{
- int ret;
-
- (void)data;
+ struct dev_context *devc;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
- ret = SR_OK;
- switch (key) {
+ devc = sdi->priv;
+
+ switch (id) {
+ case SR_CONF_SAMPLERATE:
+ if (g_variant_get_uint64(data) != SR_MHZ(100)) {
+ sr_err("ScanaPLUS only supports samplerate = 100MHz.");
+ return SR_ERR_ARG;
+ }
+ /* Nothing to do, the ScanaPLUS samplerate is always 100MHz. */
+ break;
+ case SR_CONF_LIMIT_MSEC:
+ if (g_variant_get_uint64(data) == 0)
+ return SR_ERR_ARG;
+ devc->limit_msec = g_variant_get_uint64(data);
+ break;
+ case SR_CONF_LIMIT_SAMPLES:
+ if (g_variant_get_uint64(data) == 0)
+ return SR_ERR_ARG;
+ devc->limit_samples = g_variant_get_uint64(data);
+ break;
default:
- ret = SR_ERR_NA;
+ return SR_ERR_NA;
}
- return ret;
+ return SR_OK;
}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
{
- int ret;
+ GVariant *gvar;
+ GVariantBuilder gvb;
(void)sdi;
- (void)data;
- ret = SR_OK;
switch (key) {
+ case SR_CONF_DEVICE_OPTIONS:
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+ hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
+ break;
+ case SR_CONF_SAMPLERATE:
+ g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
+ gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
+ samplerates, ARRAY_SIZE(samplerates),
+ sizeof(uint64_t));
+ g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
+ *data = g_variant_builder_end(&gvb);
+ break;
default:
return SR_ERR_NA;
}
- return ret;
+ return SR_OK;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
- (void)sdi;
- (void)cb_data;
+ int ret;
+ struct dev_context *devc;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
+ if (!(devc = sdi->priv))
+ return SR_ERR_BUG;
+
+ if (!devc->ftdic)
+ return SR_ERR_BUG;
+
+ /* TODO: Configure probes later (thresholds etc.). */
+
+ devc->cb_data = cb_data;
+
+ /* Properly reset internal variables before every new acquisition. */
+ devc->compressed_bytes_ignored = 0;
+ devc->samples_sent = 0;
+ devc->bytes_received = 0;
+
+ if ((ret = scanaplus_init(devc)) < 0)
+ return ret;
+
+ if ((ret = scanaplus_start_acquisition(devc)) < 0)
+ return ret;
+
+ /* Send header packet to the session bus. */
+ std_session_send_df_header(cb_data, LOG_PREFIX);
+
+ /* Hook up a dummy handler to receive data from the device. */
+ sr_source_add(-1, G_IO_IN, 0, scanaplus_receive_data, (void *)sdi);
+
return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
- (void)cb_data;
+ struct sr_datafeed_packet packet;
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR_DEV_CLOSED;
+ (void)sdi;
+
+ sr_dbg("Stopping acquisition.");
+ sr_source_remove(-1);
+
+ /* Send end packet to the session bus. */
+ sr_dbg("Sending SR_DF_END.");
+ packet.type = SR_DF_END;
+ sr_session_send(cb_data, &packet);
return SR_OK;
}
#include "protocol.h"
-SR_PRIV int ikalogic_scanaplus_receive_data(int fd, int revents, void *cb_data)
+/*
+ * Logic level thresholds.
+ *
+ * For each of the two channel groups (1-4 and 5-9), the logic level
+ * threshold can be set independently.
+ *
+ * The threshold can be set to values that are usable for systems with
+ * different voltage levels, e.g. for 1.8V or 3.3V systems.
+ *
+ * The actual threshold value is always the middle of the values below.
+ * E.g. for a system voltage level of 1.8V, the threshold is at 0.9V. That
+ * means that values <= 0.9V are considered to be a logic 0/low, and
+ * values > 0.9V are considered to be a logic 1/high.
+ *
+ * - 1.2V system: threshold = 0.6V
+ * - 1.5V system: threshold = 0.75V
+ * - 1.8V system: threshold = 0.9V
+ * - 2.8V system: threshold = 1.4V
+ * - 3.3V system: threshold = 1.65V
+ */
+#define THRESHOLD_1_2V_SYSTEM 0x2e
+#define THRESHOLD_1_5V_SYSTEM 0x39
+#define THRESHOLD_1_8V_SYSTEM 0x45
+#define THRESHOLD_2_8V_SYSTEM 0x6c
+#define THRESHOLD_3_3V_SYSTEM 0x7f
+
+static int scanaplus_write(struct dev_context *devc, uint8_t *buf, int size)
+{
+ int i, bytes_written;
+ GString *s;
+
+ /* Note: Caller checks devc, devc->ftdic, buf, size. */
+
+ s = g_string_sized_new(100);
+ g_string_printf(s, "Writing %d bytes: ", size);
+ for (i = 0; i < size; i++)
+ g_string_append_printf(s, "0x%02x ", buf[i]);
+ sr_spew("%s", s->str);
+ g_string_free(s, TRUE);
+
+ bytes_written = ftdi_write_data(devc->ftdic, buf, size);
+ if (bytes_written < 0) {
+ sr_err("Failed to write FTDI data (%d): %s.",
+ bytes_written, ftdi_get_error_string(devc->ftdic));
+ } else if (bytes_written != size) {
+ sr_err("FTDI write error, only %d/%d bytes written: %s.",
+ bytes_written, size, ftdi_get_error_string(devc->ftdic));
+ }
+
+ return bytes_written;
+}
+
+SR_PRIV int scanaplus_close(struct dev_context *devc)
+{
+ int ret;
+
+ /* Note: Caller checks devc and devc->ftdic. */
+
+ if ((ret = ftdi_usb_close(devc->ftdic)) < 0) {
+ sr_err("Failed to close FTDI device (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+static void scanaplus_uncompress_block(struct dev_context *devc,
+ uint64_t num_bytes)
{
- const struct sr_dev_inst *sdi;
+ uint64_t i, j;
+ uint8_t num_samples, low, high;
+
+ for (i = 0; i < num_bytes; i += 2) {
+ num_samples = devc->compressed_buf[i + 0] >> 1;
+
+ low = devc->compressed_buf[i + 0] & (1 << 0);
+ high = devc->compressed_buf[i + 1];
+
+ for (j = 0; j < num_samples; j++) {
+ devc->sample_buf[devc->bytes_received++] = high;
+ devc->sample_buf[devc->bytes_received++] = low;
+ }
+ }
+}
+
+static void send_samples(struct dev_context *devc, uint64_t samples_to_send)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
+
+ sr_spew("Sending %" PRIu64 " samples.", samples_to_send);
+
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ logic.length = samples_to_send * 2;
+ logic.unitsize = 2; /* We need 2 bytes for 9 probes. */
+ logic.data = devc->sample_buf;
+ sr_session_send(devc->cb_data, &packet);
+
+ devc->samples_sent += samples_to_send;
+ devc->bytes_received -= samples_to_send * 2;
+}
+
+SR_PRIV int scanaplus_get_device_id(struct dev_context *devc)
+{
+ int ret;
+ uint16_t val1, val2;
+
+ /* FTDI EEPROM indices 16+17 contain the 3 device ID bytes. */
+ if ((ret = ftdi_read_eeprom_location(devc->ftdic, 16, &val1)) < 0) {
+ sr_err("Failed to read EEPROM index 16 (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ return SR_ERR;
+ }
+ if ((ret = ftdi_read_eeprom_location(devc->ftdic, 17, &val2)) < 0) {
+ sr_err("Failed to read EEPROM index 17 (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ return SR_ERR;
+ }
+
+ /*
+ * Note: Bit 7 of the three bytes must not be used, apparently.
+ *
+ * Even though the three bits can be either 0 or 1 (we've seen both
+ * in actual ScanaPLUS devices), the device ID as sent to the FPGA
+ * has bit 7 of each byte zero'd out.
+ *
+ * It is unknown whether bit 7 of these bytes has any meaning,
+ * whether it's used somewhere, or whether it can be simply ignored.
+ */
+ devc->devid[0] = ((val1 >> 0) & 0xff) & ~(1 << 7);
+ devc->devid[1] = ((val1 >> 8) & 0xff) & ~(1 << 7);
+ devc->devid[2] = ((val2 >> 0) & 0xff) & ~(1 << 7);
+
+ return SR_OK;
+}
+
+static int scanaplus_clear_device_id(struct dev_context *devc)
+{
+ uint8_t buf[2];
+
+ buf[0] = 0x8c;
+ buf[1] = 0x00;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x8e;
+ buf[1] = 0x00;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x8f;
+ buf[1] = 0x00;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ return SR_OK;
+}
+
+static int scanaplus_send_device_id(struct dev_context *devc)
+{
+ uint8_t buf[2];
+
+ buf[0] = 0x8c;
+ buf[1] = devc->devid[0];
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x8e;
+ buf[1] = devc->devid[1];
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x8f;
+ buf[1] = devc->devid[2];
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ return SR_OK;
+}
+
+SR_PRIV int scanaplus_init(struct dev_context *devc)
+{
+ int i;
+ uint8_t buf[8];
+
+ buf[0] = 0x88;
+ buf[1] = 0x41;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x89;
+ buf[1] = 0x64;
+ buf[2] = 0x8a;
+ buf[3] = 0x64;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 4) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x88;
+ buf[1] = 0x41;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x88;
+ buf[1] = 0x40;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x8d;
+ buf[1] = 0x01;
+ buf[2] = 0x8d;
+ buf[3] = 0x05;
+ buf[4] = 0x8d;
+ buf[5] = 0x01;
+ buf[6] = 0x8d;
+ buf[7] = 0x02;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 8) < 0)
+ return SR_ERR;
+
+ for (i = 0; i < 57; i++) {
+ buf[0] = 0x8d;
+ buf[1] = 0x06;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x8d;
+ buf[1] = 0x02;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+ }
+
+ if (scanaplus_send_device_id(devc) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x88;
+ buf[1] = 0x40;
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ return SR_OK;
+}
+
+SR_PRIV int scanaplus_start_acquisition(struct dev_context *devc)
+{
+ uint8_t buf[4];
+
+ /* Threshold and differential probe settings not yet implemented. */
+
+ buf[0] = 0x89;
+ buf[1] = 0x7f; /* Logic level threshold for probes 1-4. */
+ buf[2] = 0x8a;
+ buf[3] = 0x7f; /* Logic level threshold for probes 5-9. */
+ if (scanaplus_write(devc, (uint8_t *)&buf, 4) < 0)
+ return SR_ERR;
+
+ buf[0] = 0x88;
+ buf[1] = 0x40; /* Special config of probes 5/6 and 7/8. */
+ /* 0x40: normal, 0x50: ch56 diff, 0x48: ch78 diff, 0x58: ch5678 diff */
+ if (scanaplus_write(devc, (uint8_t *)&buf, 2) < 0)
+ return SR_ERR;
+
+ if (scanaplus_clear_device_id(devc) < 0)
+ return SR_ERR;
+
+ if (scanaplus_send_device_id(devc) < 0)
+ return SR_ERR;
+
+ return SR_OK;
+}
+
+SR_PRIV int scanaplus_receive_data(int fd, int revents, void *cb_data)
+{
+ int bytes_read;
+ struct sr_dev_inst *sdi;
struct dev_context *devc;
+ uint64_t max, n;
(void)fd;
+ (void)revents;
if (!(sdi = cb_data))
return TRUE;
if (!(devc = sdi->priv))
return TRUE;
- if (revents == G_IO_IN) {
- /* TODO */
+ if (!devc->ftdic)
+ return TRUE;
+
+ /* Get a block of data. */
+ bytes_read = ftdi_read_data(devc->ftdic, devc->compressed_buf,
+ COMPRESSED_BUF_SIZE);
+ if (bytes_read < 0) {
+ sr_err("Failed to read FTDI data (%d): %s.",
+ bytes_read, ftdi_get_error_string(devc->ftdic));
+ sdi->driver->dev_acquisition_stop(sdi, sdi);
+ return FALSE;
+ }
+ if (bytes_read == 0) {
+ sr_spew("Received 0 bytes, nothing to do.");
+ return TRUE;
+ }
+
+ /*
+ * After a ScanaPLUS acquisition starts, a bunch of samples will be
+ * returned as all-zero, no matter which signals are actually present
+ * on the probes. This is probably due to the FPGA reconfiguring some
+ * of its internal state/config during this time.
+ *
+ * As far as we know there is apparently no way for the PC-side to
+ * know when this "reconfiguration" starts or ends. The FTDI chip
+ * will return all-zero "dummy" samples during this time, which is
+ * indistinguishable from actual all-zero samples.
+ *
+ * We currently simply ignore the first 64kB of data after an
+ * acquisition starts. Empirical tests have shown that the
+ * "reconfigure" time is a lot less than that usually.
+ */
+ if (devc->compressed_bytes_ignored < COMPRESSED_BUF_SIZE) {
+ /* Ignore the first 64kB of data of every acquisition. */
+ sr_spew("Ignoring first 64kB chunk of data.");
+ devc->compressed_bytes_ignored += COMPRESSED_BUF_SIZE;
+ return TRUE;
+ }
+
+ /* TODO: Handle bytes_read which is not a multiple of 2? */
+ scanaplus_uncompress_block(devc, bytes_read);
+
+ n = devc->samples_sent + (devc->bytes_received / 2);
+ max = (SR_MHZ(100) / 1000) * devc->limit_msec;
+
+ if (devc->limit_samples && (n >= devc->limit_samples)) {
+ send_samples(devc, devc->limit_samples - devc->samples_sent);
+ sr_info("Requested number of samples reached.");
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+ return TRUE;
+ } else if (devc->limit_msec && (n >= max)) {
+ send_samples(devc, max - devc->samples_sent);
+ sr_info("Requested time limit reached.");
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+ return TRUE;
+ } else {
+ send_samples(devc, devc->bytes_received / 2);
}
return TRUE;
#define LIBSIGROK_HARDWARE_IKALOGIC_SCANAPLUS_PROTOCOL_H
#include <stdint.h>
+#include <string.h>
#include <glib.h>
+#include <ftdi.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
/* Message logging helpers with subsystem-specific prefix string. */
-#define LOG_PREFIX "ikalogic-scanaplus: "
+#define LOG_PREFIX "scanaplus: "
#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
-/** Private, per-device-instance driver context. */
+#define COMPRESSED_BUF_SIZE (64 * 1024)
+
+/* Private, per-device-instance driver context. */
struct dev_context {
+ /** FTDI device context (used by libftdi). */
+ struct ftdi_context *ftdic;
+
+ /** The current sampling limit (in ms). */
+ uint64_t limit_msec;
+
+ /** The current sampling limit (in number of samples). */
+ uint64_t limit_samples;
+
+ void *cb_data;
+
+ uint8_t *compressed_buf;
+ uint64_t compressed_bytes_ignored;
+ uint8_t *sample_buf;
+ uint64_t bytes_received;
+ uint64_t samples_sent;
+
+ /** ScanaPLUS unique device ID (3 bytes). */
+ uint8_t devid[3];
};
-SR_PRIV int ikalogic_scanaplus_receive_data(int fd, int revents, void *cb_data);
+SR_PRIV int scanaplus_close(struct dev_context *devc);
+SR_PRIV int scanaplus_get_device_id(struct dev_context *devc);
+SR_PRIV int scanaplus_init(struct dev_context *devc);
+SR_PRIV int scanaplus_start_acquisition(struct dev_context *devc);
+SR_PRIV int scanaplus_receive_data(int fd, int revents, void *cb_data);
#endif
projects / libsigrok.git / commitdiff