/*
* This file is part of the libsigrok project.
*
- * Copyright (C) 2022
AC0BI <ac0bi00@gmail.com>
+ * Copyright (C) 2022
Shawn Walker <ac0bi00@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
+//debug print levels are err/warn/info/dbg/spew
#include <config.h>
+#include <fcntl.h>
+#include <glib.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <libsigrok/libsigrok.h>
+#include "libsigrok-internal.h"
#include "protocol.h"
-static struct sr_dev_driver raspberrypi_pico_driver_info;
+//Baud rate is really a don't care because we run USB CDC, dtr must be 1.
+//flow should be zero since we don't
+//use xon/xoff
+#define SERIALCOMM "115200/8n1/dtr=1/rts=0/flow=0"
-static GSList *scan(struct sr_dev_driver *di, GSList *options)
-{
- struct drv_context *drvc;
- GSList *devices;
+static const uint32_t scanopts[] = {
+ SR_CONF_CONN, //Required OS name for the port, i.e. /dev/ttyACM0
+ SR_CONF_SERIALCOMM, //Optional config of the port, i.e. 115200/8n1
+};
+//Sample rate can either provide a std_gvar_samplerates_steps or a std_gvar_samplerates.
+//The latter is just a long list of every supported rate.
+//For the steps, pulseview/pv/toolbars/mainbar.cpp will do a min,max,step. If step is
+//1 then it provides a 1,2,5,10 select otherwise it allows a spin box.
+//Going with the full list because while the spin box is more flexible, it is harder to read
+static const uint64_t samplerates[] = {
+ SR_KHZ(5),
+ SR_KHZ(6),
+ SR_KHZ(8),
+ SR_KHZ(10),
+ SR_KHZ(20),
+ SR_KHZ(30),
+ SR_KHZ(40),
+ SR_KHZ(50),
+ SR_KHZ(60),
+ SR_KHZ(80),
+ SR_KHZ(100),
+ SR_KHZ(125),
+ SR_KHZ(150),
+ SR_KHZ(160),//max rate of 3 ADC channels that has integer divisor/dividend
+ SR_KHZ(200),
+ SR_KHZ(250), //max rate of 2 ADC channels
+ SR_KHZ(300),
+ SR_KHZ(400),
+ SR_KHZ(500),
+ SR_KHZ(600),
+ SR_KHZ(800),
+ //Give finer granularity near the thresholds of RLE effectiveness ~1-4Msps
+ //Also use 1.2 and 2.4 as likely max values for ADC overclocking
+ SR_MHZ(1),
+ SR_MHZ(1.2),
+ SR_MHZ(1.5),
+ SR_MHZ(2),
+ SR_MHZ(2.4),
+ SR_MHZ(3),
+ SR_MHZ(4),
+ SR_MHZ(5),
+ SR_MHZ(6),
+ SR_MHZ(8),
+ SR_MHZ(10),
+ SR_MHZ(15),
+ SR_MHZ(20),
+ SR_MHZ(30),
+ SR_MHZ(40),
+ SR_MHZ(60),
+ //The baseline 120Mhz PICO clock won't support an 80 or 100
+ //with non fractional divisor, but an overclocked version or one
+ //that modified sysclk could
+ SR_MHZ(80),
+ SR_MHZ(100),
+ SR_MHZ(120),
+ //These may not be practically useful, but someone might want to
+ //try to make it work with overclocking
+ SR_MHZ(150),
+ SR_MHZ(200),
+ SR_MHZ(240)
+};
- (void)options;
+static const uint32_t drvopts[] = {
+ SR_CONF_OSCILLOSCOPE,
+ SR_CONF_LOGIC_ANALYZER,
+};
- devices = NULL;
- drvc = di->context;
- drvc->instances = NULL;
+//SW trigger requires this
+static const int32_t trigger_matches[] = {
+ SR_TRIGGER_ZERO,
+ SR_TRIGGER_ONE,
+ SR_TRIGGER_RISING,
+ SR_TRIGGER_FALLING,
+ SR_TRIGGER_EDGE,
+};
- /* TODO: scan for devices, either based on a SR_CONF_CONN option
- * or on a USB scan. */
- return devices;
-}
+static const uint32_t devopts[] = {
+//CLI prefers LIMIT_SAMPLES to be a list of high,low
+ SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+ SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
+ SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
+//pulseview needs a list return to allow sample rate setting
+ SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+};
-static int dev_open(struct sr_dev_inst *sdi)
-{
- (void)sdi;
+static struct sr_dev_driver raspberrypi_pico_driver_info;
- /* TODO: get handle from sdi->conn and open it. */
- return SR_OK;
-}
-
-static int dev_close(struct sr_dev_inst *sdi)
+static GSList *scan(struct sr_dev_driver *di, GSList * options)
{
- (void)sdi;
+ struct sr_config *src;
+ struct sr_dev_inst *sdi;
+ struct sr_serial_dev_inst *serial;
+ struct dev_context *devc;
+ struct sr_channel *ch;
+ GSList *l;
+ int num_read;
+ unsigned int i;
+ const char *conn, *serialcomm;
+ char buf[32];
+ int len;
+ uint8_t num_a, num_d, a_size;
+ gchar *channel_name;
+
+ conn = serialcomm = NULL;
+ for (l = options; l; l = l->next) {
+ src = l->data;
+ switch (src->key) {
+ case SR_CONF_CONN:
+ conn = g_variant_get_string(src->data, NULL);
+ break;
+ case SR_CONF_SERIALCOMM:
+ serialcomm = g_variant_get_string(src->data, NULL);
+ break;
+ }
+ }
+ if (!conn)
+ return NULL;
- /* TODO: get handle from sdi->conn and close it. */
+ if (!serialcomm)
+ serialcomm = SERIALCOMM;
- return SR_OK;
-}
+ serial = sr_serial_dev_inst_new(conn, serialcomm);
+ sr_info("Opening %s.", conn);
+ if (serial_open(serial, SERIAL_RDWR) != SR_OK) {
+ sr_err("1st serial open fail");
+ return NULL;
+ }
-static int config_get(uint32_t key, GVariant **data,
- const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
-{
- int ret;
+ sr_info("Resetting device with *s at %s.", conn);
+ send_serial_char(serial, '*');
+ g_usleep(10000);
+ //drain any inflight data
+ do {
+ sr_warn("Drain reads");
+ len = serial_read_blocking(serial, buf, 32, 100);
+ sr_warn("Drain reads done");
+ if (len)
+ sr_dbg("Dropping in flight serial data");
+ } while (len > 0);
+
+
+ //Send identify
+ num_read = send_serial_w_resp(serial, "i\n", buf, 17);
+ if (num_read < 16) {
+ sr_err("1st identify failed");
+ serial_close(serial);
+ g_usleep(100000);
+ if (serial_open(serial, SERIAL_RDWR) != SR_OK) {
+ sr_err("2nd serial open fail");
+ return NULL;
+ }
+ g_usleep(100000);
+ sr_err("Send second *");
+ send_serial_char(serial, '*');
+ g_usleep(100000);
+ num_read = send_serial_w_resp(serial, "i\n", buf, 17);
+ if (num_read < 10) {
+ sr_err("Second attempt failed");
+ return NULL;
+ }
+ }
+ //Expected ID response is SRPICO,AxxyDzz,VV
+ //where xx are number of analog channels, y is bytes per analog sample
+ //and zz is number of digital channels, and VV is two digit version# which must be 02
+ if ((num_read < 16)
+ || (strncmp(buf, "SRPICO,A", 8))
+ || (buf[11] != 'D')
+ || (buf[15] != '0')
+ || (buf[16] != '2')) {
+ sr_err("ERROR:Bad response string %s %d", buf, num_read);
+ return NULL;
+ }
+ a_size = buf[10] - '0';
+ buf[10] = '\0'; //Null to end the str for atois
+ buf[14] = '\0'; //Null to end the str for atois
+ num_a = atoi(&buf[8]);
+ num_d = atoi(&buf[12]);
+
+ sdi = g_malloc0(sizeof(struct sr_dev_inst));
+ sdi->status = SR_ST_INACTIVE;
+ sdi->vendor = g_strdup("Raspberry Pi");
+ sdi->model = g_strdup("PICO");
+ sdi->version = g_strdup("00");
+ sdi->conn = serial;
+ sdi->driver = &raspberrypi_pico_driver_info;
+ sdi->inst_type = SR_INST_SERIAL;
+ sdi->serial_num = g_strdup("N/A");
+ if (((num_a == 0) && (num_d == 0))
+ || (num_a > MAX_ANALOG_CHANNELS)
+ || (num_d > MAX_DIGITAL_CHANNELS)
+ || (a_size < 1)
+ || (a_size > 4)) {
+ sr_err("ERROR: invalid channel config a %d d %d asz %d",
+ num_a, num_d, a_size);
+ return NULL;
+ }
+ devc = g_malloc0(sizeof(struct dev_context));
+ devc->a_size = a_size;
+ //multiple bytes per analog sample not supported
+ if ((num_a > 0) && (devc->a_size != 1)) {
+ sr_err("Only Analog Size of 1 supported\n\r");
+ return NULL;
+ }
+ devc->num_a_channels = num_a;
+ devc->num_d_channels = num_d;
+ devc->a_chan_mask = ((1 << num_a) - 1);
+ devc->d_chan_mask = ((1 << num_d) - 1);
+//The number of bytes that each digital sample in the buffers sent to the session.
+//All logical channels are packed together, where a slice of N channels takes roundup(N/8) bytes
+//This never changes even if channels are disabled because PV expects disabled channels to still
+//be accounted for in the packing
+ devc->dig_sample_bytes = ((devc->num_d_channels + 7) / 8);
+ //These are the slice sizes of the data on the wire
+ //1 7 bit field per byte
+ devc->bytes_per_slice = (devc->num_a_channels * devc->a_size);
+ if (devc->num_d_channels > 0) {
+ // logic sent in groups of 7
+ devc->bytes_per_slice += (devc->num_d_channels + 6) / 7;
+ }
+ sr_dbg("num channels a %d d %d bps %d dsb %d", num_a, num_d,
+ devc->bytes_per_slice, devc->dig_sample_bytes);
+//Each analog channel is it's own group
+//Digital are just channels
+//Grouping of channels is rather arbitrary as parameters like sample rate and number of samples
+//apply to all changes. Analog channels do have a scale and offset, but that is applied
+//without involvement of the session.
+ devc->analog_groups = g_malloc0(sizeof(struct sr_channel_group *) *
+ devc->num_a_channels);
+ for (i = 0; i < devc->num_a_channels; i++) {
+ channel_name = g_strdup_printf("A%d", i);
+ //sdi, index, type, enabled,name
+ ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE,
+ channel_name);
+ devc->analog_groups[i] =
+ g_malloc0(sizeof(struct sr_channel_group));
+ devc->analog_groups[i]->name = channel_name;
+ devc->analog_groups[i]->channels =
+ g_slist_append(NULL, ch);
+ sdi->channel_groups =
+ g_slist_append(sdi->channel_groups,
+ devc->analog_groups[i]);
+ }
- (void)sdi;
- (void)data;
- (void)cg;
+ if (devc->num_d_channels > 0) {
+ for (i = 0; i < devc->num_d_channels; i++) {
+ //Name digital channels starting at D2 to match pico board pin names
+ channel_name = g_strdup_printf("D%d", i + 2);
+ sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
+ channel_name);
+ g_free(channel_name);
+ }
- ret = SR_OK;
- switch (key) {
- /* TODO */
- default:
- return SR_ERR_NA;
}
+ //In large sample usages we get the call to receive with large transfers.
+ //Since the CDC serial implemenation can silenty lose data as it gets close to full, allocate
+ //storage for a half buffer which in a worst case scenario has 2x ratio of transmitted bytes
+ // to storage bytes.
+ //Note: The intent of making this buffer large is to prevent CDC serial buffer overflows.
+ //However, it is likely that if the host is running slow (i.e. it's a raspberry pi model 3) that it becomes
+ //compute bound and doesn't service CDC serial responses in time to not overflow the internal CDC buffers.
+ //And thus no serial buffer is large enough. But, it's only 32K....
+ devc->serial_buffer_size = 32000;
+ devc->buffer = NULL;
+ sr_dbg("Setting serial buffer size: %i.",
+ devc->serial_buffer_size);
+ devc->cbuf_wrptr = 0;
+ //While slices are sent as a group of one sample across all channels, sigrok wants analog
+ //channel data sent as separate packets.
+ //Logical trace values are packed together.
+ //An RLE byte in normal mode can represent up to 1640 samples.
+ //In D4 an RLE byte can represents up to 640 samples.
+ //Rather than making the sample_buf_size 1640x the size of serial buff, we require that the process loops
+ //push samples to the session as we get anywhere close to full.
+
+ devc->sample_buf_size = devc->serial_buffer_size;
+ for (i = 0; i < devc->num_a_channels; i++) {
+ devc->a_data_bufs[i] = NULL;
+ devc->a_pretrig_bufs[i] = NULL;
+ }
+ devc->d_data_buf = NULL;
+ devc->sample_rate = 5000;
+ devc->capture_ratio = 10;
+ devc->rxstate = RX_IDLE;
+ sdi->priv = devc;
+ //Set an initial value as various code relies on an inital value.
+ devc->limit_samples = 1000;
+
+ if (raspberrypi_pico_get_dev_cfg(sdi) != SR_OK) {
+ return NULL;
+ };
+
+ sr_err("sr_err level logging enabled");
+ sr_warn("sr_warn level logging enabled");
+ sr_info("sr_info level logging enabled");
+ sr_dbg("sr_dbg level logging enabled");
+ sr_spew("sr_spew level logging enabled");
+ serial_close(serial);
+ return std_scan_complete(di, g_slist_append(NULL, sdi));
- return ret;
}
-static int config_set(uint32_t key, GVariant *data,
- const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
-{
- int ret;
- (void)sdi;
- (void)data;
- (void)cg;
+//Note that on the initial driver load we pull all values into local storage.
+//Thus gets can return local data, but sets have to issue commands to device.
+static int config_set(uint32_t key, GVariant * data,
+ const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ struct dev_context *devc;
+ int ret;
+ (void) cg;
+ if (!sdi)
+ return SR_ERR_ARG;
+ devc = sdi->priv;
ret = SR_OK;
+ sr_dbg("Got config_set key %d \n", key);
switch (key) {
- /* TODO */
+ case SR_CONF_SAMPLERATE:
+ devc->sample_rate = g_variant_get_uint64(data);
+ sr_dbg("config_set sr %llu\n", devc->sample_rate);
+ break;
+ case SR_CONF_LIMIT_SAMPLES:
+ devc->limit_samples = g_variant_get_uint64(data);
+ sr_dbg("config_set slimit %" PRIu64 "\n", devc->limit_samples);
+ break;
+ case SR_CONF_CAPTURE_RATIO:
+ devc->capture_ratio = g_variant_get_uint64(data);
+ break;
+
default:
+ sr_err("ERROR:config_set undefine %d\n", key);
ret = SR_ERR_NA;
}
return ret;
}
-static int config_list(uint32_t key, GVariant **data,
- const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
+static int config_get(uint32_t key, GVariant ** data,
+ const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
{
- int ret;
+ struct dev_context *devc;
+ sr_dbg("at config_get key %d", key);
+ (void) cg;
+ if (!sdi)
+ return SR_ERR_ARG;
- (void)sdi;
- (void)data;
- (void)cg;
+ devc = sdi->priv;
+ switch (key) {
+ case SR_CONF_SAMPLERATE:
+ *data = g_variant_new_uint64(devc->sample_rate);
+ sr_spew("sample rate get of %" PRIu64 "", devc->sample_rate);
+ break;
+ case SR_CONF_CAPTURE_RATIO:
+ if (!sdi)
+ return SR_ERR;
+ devc = sdi->priv;
+ *data = g_variant_new_uint64(devc->capture_ratio);
+ break;
+ case SR_CONF_LIMIT_SAMPLES:
+ sr_spew("config_get limit_samples of %llu",
+ devc->limit_samples);
+ *data = g_variant_new_uint64(devc->limit_samples);
+ break;
+ default:
+ sr_spew("unsupported cfg_get key %d", key);
+ return SR_ERR_NA;
+ }
+ return SR_OK;
+}
- ret = SR_OK;
+static int config_list(uint32_t key, GVariant ** data,
+ const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ (void) cg;
+ //scan or device options are the only ones that can be called without a defined instance
+ if ((key == SR_CONF_SCAN_OPTIONS)
+ || (key == SR_CONF_DEVICE_OPTIONS)) {
+ return STD_CONFIG_LIST(key, data, sdi, cg, scanopts,
+ drvopts, devopts);
+ }
+ if (!sdi) {
+ sr_err
+ ("ERROR:\n\r\n\r\n\r Call to config list with null sdi\n\r\n\r");
+ return SR_ERR_ARG;
+ }
+ sr_dbg("start config_list with key %X\n", key);
switch (key) {
- /* TODO */
+ case SR_CONF_SAMPLERATE:
+ sr_dbg("Return sample rate list");
+ *data =
+ std_gvar_samplerates(ARRAY_AND_SIZE
+ (samplerates));
+ break;
+//This must be set to get SW trigger support
+ case SR_CONF_TRIGGER_MATCH:
+ *data =
+ std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
+ break;
+ case SR_CONF_LIMIT_SAMPLES:
+ //Really this limit is up to the memory capacity of the host,
+ //and users that pick huge values deserve what they get.
+ //But setting this limit to prevent really crazy things.
+ *data = std_gvar_tuple_u64(1LL, 1000000000LL);
+ sr_dbg("sr_config_list limit samples ");
+ break;
default:
+ sr_dbg("reached default statement of config_list");
+
return SR_ERR_NA;
}
- return ret;
+ return SR_OK;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
- /* TODO: configure hardware, reset acquisition state, set up
- * callbacks and send header packet. */
+ struct sr_serial_dev_inst *serial;
+ struct dev_context *devc;
+ struct sr_channel *ch;
+ struct sr_trigger *trigger;
+ char tmpstr[20];
+ char buf[32];
+ GSList *l;
+ int a_enabled = 0, d_enabled = 0, len;
+ serial = sdi->conn;
+ int i,num_read;
+ devc = sdi->priv;
+ sr_dbg("Enter acq start");
+ sr_dbg("dsbstart %d", devc->dig_sample_bytes);
+ devc->buffer = g_malloc(devc->serial_buffer_size);
+ if (!(devc->buffer)) {
+ sr_err("ERROR:serial buffer malloc fail");
+ return SR_ERR_MALLOC;
+ }
+ //Get device in idle state
+ if (serial_drain(serial) != SR_OK) {
+ sr_err("Initial Drain Failed\n\r");
+ return SR_ERR;
+ }
+ send_serial_char(serial, '*');
+ if (serial_drain(serial) != SR_OK) {
+ sr_err("Second Drain Failed\n\r");
+ return SR_ERR;
+ }
+
+ for (l = sdi->channels; l; l = l->next) {
+ ch = l->data;
+ sr_dbg("c %d enabled %d name %s\n", ch->index, ch->enabled,
+ ch->name);
+
+ if (ch->name[0] == 'A') {
+ devc->a_chan_mask &= ~(1 << ch->index);
+ if (ch->enabled) {
+ devc->a_chan_mask |=
+ (ch->enabled << ch->index);
+ a_enabled++;
+ }
+ }
+ if (ch->name[0] == 'D') {
+ devc->d_chan_mask &= ~(1 << ch->index);
+ if (ch->enabled) {
+ devc->d_chan_mask |=
+ (ch->enabled << ch->index);
+ d_enabled++;
+ }
+ }
+ sr_info("Channel enable masks D 0x%X A 0x%X",
+ devc->d_chan_mask, devc->a_chan_mask);
+ sprintf(tmpstr, "%c%d%d\n", ch->name[0], ch->enabled,
+ ch->index);
+ if (send_serial_w_ack(serial, tmpstr) != SR_OK) {
+ sr_err("ERROR:Channel enable fail");
+ return SR_ERR;
+ } else {
+
+ }
+ }//for all channels
+ //ensure data channels are continuous
+ int invalid = 0;
+ for (i = 0; i < 32; i++) {
+ if ((devc->d_chan_mask >> i) & 1) {
+ if (invalid) {
+ sr_err
+ ("Digital channel mask 0x%X not continous\n\r",
+ devc->d_chan_mask);
+ return SR_ERR;
+ }
+ } else {
+ invalid = 1;
+ }
+ }
+ //recalculate bytes_per_slice based on which analog channels are enabled
+ devc->bytes_per_slice = (a_enabled * devc->a_size);
+
+ for (i = 0; i < devc->num_d_channels; i += 7) {
+ if (((devc->d_chan_mask) >> i) & (0x7F)) {
+ (devc->bytes_per_slice)++;
+ }
+ }
+ if ((a_enabled == 0) && (d_enabled == 0)) {
+ sr_err("ERROR:No channels enabled");
+ return SR_ERR;
+ }
+ sr_dbg("bps %d\n", devc->bytes_per_slice);
+
+ //Apply sample rate limits
+ //While earlier versions forced a lower sample rate, the PICO seems to allow
+ //ADC overclocking, and by not enforcing these limits it may support other devices.
+ //Thus call sr_err to get something into the device logs, but allowing it to progress.
+ if ((a_enabled == 3) && (devc->sample_rate > 160000)) {
+ sr_err
+ ("WARN:3 channel ADC sample rate above 160khz");
+ }
+ if ((a_enabled == 2) && (devc->sample_rate > 250000)) {
+ sr_err
+ ("WARN:2 channel ADC sample rate above 250khz");
+ }
+ if ((a_enabled == 1) && (devc->sample_rate > 500000)) {
+ sr_err
+ ("WARN:1 channel ADC sample rate above 500khz");
+ }
+ //Depending on channel configs, rates below 5ksps are possible
+ //but such a low rate can easily stream and this eliminates a lot
+ //of special cases.
+ if (devc->sample_rate < 5000) {
+ sr_err("Sample rate override to min of 5ksps");
+ devc->sample_rate = 5000;
+ }
+ //While PICO specs a max clock ~120-125Mhz, it does overclock in many cases
+ //so leaving is a warning.
+ if (devc->sample_rate > 120000000) {
+ sr_err("WARN: Sample rate above 120Msps");
+ }
+ //It may take a very large number of samples to notice, but if digital and analog are enabled
+ //and either PIO or ADC are fractional the samples will skew over time.
+ //24Mhz is the max common divisor to the 120Mhz and 48Mhz ADC clock
+ //so force an integer divisor to 24Mhz.
+ if ((a_enabled > 0) && (d_enabled > 0)) {
+ if (24000000ULL % (devc->sample_rate)) {
+ uint32_t commondivint =
+ 24000000ULL / (devc->sample_rate);
+ //Always increment the divisor so that we go down in frequency to avoid max sample rate issues
+ commondivint++;
+ devc->sample_rate = 24000000ULL / commondivint;
+ //Make sure the divisor increement didn't make use go too low.
+ if (devc->sample_rate < 5000) {
+ devc->sample_rate = 50000;
+ }
+ sr_err
+ ("WARN: Forcing common integer divisor sample rate of %llu div %u\n\r",
+ devc->sample_rate, commondivint);
+ }
+
+ }
+ //If we are only digital or only analog print a warning that the
+ //fractional divisors aren't a true PLL fractional feedback loop and thus
+ //could have sample to sample variation.
+ //These warnings of course assume that the device is programmed with the expected ratios
+ //but non PICO implementations, or PICO implementations that use different divisors could avoid.
+ //This generally won't be a problem because most of the sampe_rate pulldown values are integer divisors.
+ if (a_enabled > 0) {
+ if (48000000ULL % (devc->sample_rate * a_enabled)) {
+ sr_warn
+ ("WARN: Non integer ADC divisor of 48Mhz clock for sample rate %llu may cause sample to sample variability.",
+ devc->sample_rate);
+ }
+ }
+ if (d_enabled > 0) {
+ if (120000000ULL % (devc->sample_rate)) {
+ sr_warn
+ ("WARN: Non integer PIO divisor of 120Mhz for sample rate %llu may cause sample to sample variability.",
+ devc->sample_rate);
+ }
+ }
+
+
+ sprintf(tmpstr, "L%" PRIu64 "\n", devc->limit_samples);
+ if (send_serial_w_ack(serial, tmpstr) != SR_OK) {
+ sr_err("Sample limit to device failed");
+ return SR_ERR;
+ }
+ //To support future devices that may allow the analog scale/offset to change, call get_dev_cfg again to get new values
+ if(raspberrypi_pico_get_dev_cfg(sdi) != SR_OK){
+ sr_err("get_dev_cfg failure on start");
+ return SR_ERR;
+ }
+
+ //With all other params set, we use the final sample rate setting as an opportunity for the device
+ //to communicate any errors in configuration.
+ //A single "*" indicates success.
+ //A "*" with subsequent data is success, but allows for the device to print something
+ //to the error console without aborting.
+ //A non "*" in the first character blocks the start
+ sprintf(tmpstr, "R%llu\n", devc->sample_rate);
+ num_read = send_serial_w_resp(serial, tmpstr, buf, 30);
+ buf[num_read]=0;
+ if((num_read>1)&&(buf[0]=='*')){
+ sr_err("Sample rate to device success with resp %s",buf);
+ }
+ else if(!((num_read==1)&&(buf[0]=='*'))){
+ sr_err("Sample rate to device failed");
+ if(num_read>0){
+ buf[num_read]=0;
+ sr_err("sample_rate error string %s",buf);
+ }
+ return SR_ERR;
+ }
+ devc->sent_samples = 0;
+ devc->byte_cnt = 0;
+ devc->bytes_avail = 0;
+ devc->wrptr = 0;
+ devc->cbuf_wrptr = 0;
+ len =
+ serial_read_blocking(serial, devc->buffer,
+ devc->serial_buffer_size,
+ serial_timeout(serial, 4));
+ if (len > 0) {
+ sr_info("Pre-ARM drain had %d characters:", len);
+ devc->buffer[len] = 0;
+ sr_info("%s", devc->buffer);
+ }
+
+ for (i = 0; i < devc->num_a_channels; i++) {
+ devc->a_data_bufs[i] =
+ g_malloc(devc->sample_buf_size * sizeof(float));
+ if (!(devc->a_data_bufs[i])) {
+ sr_err("ERROR:analog buffer malloc fail");
+ return SR_ERR_MALLOC;
+ }
+ }
+ if (devc->num_d_channels > 0) {
+ devc->d_data_buf =
+ g_malloc(devc->sample_buf_size *
+ devc->dig_sample_bytes);
+ if (!(devc->d_data_buf)) {
+ sr_err("ERROR:logic buffer malloc fail");
+ return SR_ERR_MALLOC;
+ }
+ }
+ devc->pretrig_entries =
+ (devc->capture_ratio * devc->limit_samples) / 100;
+ //While the driver supports the passing of trigger info to the device
+ //it has been found that the sw overhead of supporting triggering and
+ //pretrigger buffer entries etc.. ends up slowing the cores down enough
+ //that the effective continous sample rate isn't much higher than that of sending
+ //untriggered samples across USB. Thus this code will remain but likely may
+ //not be used by the device, unless HW based triggers are implemented
+ if ((trigger = sr_session_trigger_get(sdi->session))) {
+ if (g_slist_length(trigger->stages) > 1)
+ return SR_ERR_NA;
+
+ struct sr_trigger_stage *stage;
+ struct sr_trigger_match *match;
+ GSList *l;
+ stage = g_slist_nth_data(trigger->stages, 0);
+ if (!stage)
+ return SR_ERR_ARG;
+ for (l = stage->matches; l; l = l->next) {
+ match = l->data;
+ if (!match->match)
+ continue;
+ if (!match->channel->enabled)
+ continue;
+ int idx = match->channel->index;
+ int8_t val;
+ switch(match->match){
+ case SR_TRIGGER_ZERO:
+ val=0; break;
+ case SR_TRIGGER_ONE:
+ val=1; break;
+ case SR_TRIGGER_RISING:
+ val=2; break;
+ case SR_TRIGGER_FALLING:
+ val=3; break;
+ case SR_TRIGGER_EDGE:
+ val=4; break;
+ default:
+ val=-1;
+ }
+ sr_info("Trigger value idx %d match %d",idx,match->match);
+ //Only set trigger on enabled channels
+ if((val>=0) && ((devc->d_chan_mask>>idx)&1)){
+ sprintf(&tmpstr[0], "t%d%02d\n", val,idx+2);
+ if (send_serial_w_ack(serial, tmpstr) != SR_OK) {
+ sr_err("Trigger cfg to device failed");
+ return SR_ERR;
+ }
+
+ }
+ }
+ sprintf(&tmpstr[0], "p%d\n", devc->pretrig_entries);
+ if (send_serial_w_ack(serial, tmpstr) != SR_OK) {
+ sr_err("Pretrig to device failed");
+ return SR_ERR;
+ }
+ devc->stl =
+ soft_trigger_logic_new(sdi, trigger,
+ devc->pretrig_entries);
+ if (!devc->stl)
+ return SR_ERR_MALLOC;
+ devc->trigger_fired = FALSE;
+ if (devc->pretrig_entries > 0) {
+ sr_dbg("Allocating pretrig buffers size %d",
+ devc->pretrig_entries);
+ for (i = 0; i < devc->num_a_channels; i++) {
+ if ((devc->a_chan_mask >> i) & 1) {
+ devc->a_pretrig_bufs[i] =
+ g_malloc0(sizeof(float) *
+ devc->
+ pretrig_entries);
+ if (!devc->a_pretrig_bufs[i]) {
+ sr_err
+ ("ERROR:Analog pretrigger buffer malloc failure, disabling");
+ devc->trigger_fired = TRUE;
+ }
+ } //if chan_mask
+ } //for num_a_channels
+ } //if pre_trigger
+ sr_info("Entering sw triggered mode");
+ //post the receive before starting the device to ensure we are ready to receive data ASAP
+ serial_source_add(sdi->session, serial, G_IO_IN, 200,
+ raspberrypi_pico_receive, (void *) sdi);
+ sprintf(tmpstr, "C\n");
+ if (send_serial_str(serial, tmpstr) != SR_OK)
+ return SR_ERR;
+
+ } else {
+ devc->trigger_fired = TRUE;
+ devc->pretrig_entries = 0;
+ sr_info("Entering fixed sample mode");
+ serial_source_add(sdi->session, serial, G_IO_IN, 200,
+ raspberrypi_pico_receive, (void *) sdi);
+ sprintf(tmpstr, "F\n");
+ if (send_serial_str(serial, tmpstr) != SR_OK)
+ return SR_ERR;
+ }
+ std_session_send_df_header(sdi);
+
+ sr_dbg("dsbstartend %d", devc->dig_sample_bytes);
- (void)sdi;
+ if (devc->trigger_fired)
+ std_session_send_df_trigger(sdi);
+ //Keep this at the end as we don't want to be RX_ACTIVE unless everything is ok
+ devc->rxstate = RX_ACTIVE;
return SR_OK;
}
+//This function is called either by the protocol code if we reached all of the samples
+//or an error condition, and also by the user clicking stop in pulseview.
+//It must always be called for any acquistion that was started to free memory.
static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
- /* TODO: stop acquisition. */
-
- (void)sdi;
-
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ sr_dbg("****at dev_acquisition_stop");
+ int len;
+ devc = sdi->priv;
+ serial = sdi->conn;
+
+ std_session_send_df_end(sdi);
+ //If we reached this while still active it is likely because the stop button was pushed
+ //in pulseview.
+ //That is generally some kind of error condition, so we don't try to check the bytenct
+ if (devc->rxstate == RX_ACTIVE) {
+ sr_err("Reached dev_acquisition_stop in RX_ACTIVE");
+ }
+ if (devc->rxstate != RX_IDLE) {
+ sr_err("Sending plus to stop device stream\n\r");
+ send_serial_char(serial, '+');
+ }
+ //In case we get calls to receive force it to exit
+ devc->rxstate = RX_IDLE;
+ //drain data from device so that it doesn't confuse subsequent commands
+ do {
+ len =
+ serial_read_blocking(serial, devc->buffer,
+ devc->serial_buffer_size, 100);
+ if (len)
+ sr_err("Dropping %d device bytes\n\r", len);
+ } while (len > 0);
+ if (devc->buffer) {
+ g_free(devc->buffer);
+ devc->buffer = NULL;
+ }
+ for (int i = 0; i < devc->num_a_channels; i++) {
+ if (devc->a_data_bufs[i]) {
+ g_free(devc->a_data_bufs[i]);
+ devc->a_data_bufs[i] = NULL;
+ }
+ }
+ if (devc->d_data_buf) {
+ g_free(devc->d_data_buf);
+ devc->d_data_buf = NULL;
+ }
+ for (int i = 0; i < devc->num_a_channels; i++) {
+ if (devc->a_pretrig_bufs[i])
+ g_free(devc->a_pretrig_bufs[i]);
+ devc->a_pretrig_bufs[i] = NULL;
+ }
+ serial = sdi->conn;
+ serial_source_remove(sdi->session, serial);
return SR_OK;
}
.config_get = config_get,
.config_set = config_set,
.config_list = config_list,
- .dev_open = dev_open,
- .dev_close = dev_close,
+ .dev_open = std_serial_dev_open,
+ .dev_close = std_serial_dev_close,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = dev_acquisition_stop,
.context = NULL,
};
+
SR_REGISTER_DEV_DRIVER(raspberrypi_pico_driver_info);
projects / libsigrok.git / blobdiff