2 * This file is part of the libsigrok project.
4 * Copyright (C) 2018 Gerhard Sittig <gerhard.sittig@gmx.net>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 * - Data acquisition works, but triggers either seem to not take effect,
23 * or the trigger position is not in the expected spot according to the
24 * user provided acquisition parameters. More research is required. The
25 * bitmasks for enable/level/edge as well as the magic 16bit values for
26 * position may need adjustment.
27 * - The trigger position logic assumes that capture ratio specs are in
28 * the range of 0-6%, which gets mapped to none/10%/50%/90%/+1W/+2W/+3W
29 * choices. This avoids issues with applications which lack support for
30 * non-contiguous discrete supported values, and values outside of the
31 * 0-100% range. This is considered acceptable, to avoid the necessity
32 * to extend common infrastructure to an unusual feature of a single
33 * device of limited popularity. Just needs to get communicated to users.
34 * - When a formula for the trigger position values in the SETUP packet
35 * is found, the driver may accept arbitrary values between 0-100%, but
36 * still could not express the "plus N windows" settings. Though that'd
37 * be a rather useful feature considering the very short memory depth.
38 * - The current implementation assumes externally provided Vdd, without
39 * which input levels won't get detected. A future implementation could
40 * optionally power Vdd from the PICkit2 itself, according to a user
41 * provided configuration value.
42 * - The current implementation silently accepts sample count limits beyond
43 * 1024, just won't provide more than 1024 samples to the session. A
44 * future implementation could cap the settings upon reception. Apps
45 * like PulseView may not be able to specify 1024, and pass 1000 or
46 * 2000 instead (the latter results in 1024 getting used).
47 * - The manual suggests that users can assign names to devices. The
48 * current implementation supports conn= specs with USB VID:PID pairs
49 * or bus/address numbers. A future implementation could scan for user
50 * assigned names as well (when the opcode to query the name was found).
51 * - The "attach kernel driver" support code probably should move to a
52 * common location, instead of getting repeated across several drivers.
53 * - Diagnostics may benefit from cleanup.
61 #define PICKIT2_VENDOR_NAME "Microchip"
62 #define PICKIT2_PRODUCT_NAME "PICkit2"
64 #define PICKIT2_DEFAULT_ADDRESS "04d8.0033"
65 #define PICKIT2_USB_INTERFACE 0
67 static struct sr_dev_driver microchip_pickit2_driver_info;
69 static const char *channel_names[] = {
70 "pin4", "pin5", "pin6",
73 static const uint32_t scanopts[] = {
77 static const uint32_t drvopts[] = {
78 SR_CONF_LOGIC_ANALYZER,
81 static const uint32_t devopts[] = {
82 SR_CONF_CONN | SR_CONF_GET,
83 SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
84 SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
85 SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
86 SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
89 static const int32_t trigger_matches[] = {
97 * Note that a list of 0, 10, 50, 90, 91, 92, 93, would have been nicer
98 * from a user's perspective, but applications may not support a set of
99 * discrete supported values, and 91+ is as much of a hack to work around
100 * the "0-100%" limitation. So let's map those 0-6 "percent" to the vendor
101 * app's 10/50/90/1W/2W/3W locations.
103 static const uint64_t captureratios[] = {
107 static const uint64_t samplerates[] = {
118 static GSList *scan(struct sr_dev_driver *di, GSList *options)
120 struct drv_context *drvc;
122 GSList *l, *devices, *usb_devices;
123 struct sr_config *cfg;
124 struct sr_usb_dev_inst *usb;
125 struct sr_dev_inst *sdi;
126 struct sr_channel_group *cg;
127 size_t ch_count, ch_idx;
128 struct sr_channel *ch;
129 struct dev_context *devc;
133 conn = PICKIT2_DEFAULT_ADDRESS;
134 for (l = options; l; l = l->next) {
138 conn = g_variant_get_string(cfg->data, NULL);
144 usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
148 for (l = usb_devices; l; l = l->next) {
151 /* Create the device instance. */
152 sdi = g_malloc0(sizeof(*sdi));
153 devices = g_slist_append(devices, sdi);
154 sdi->status = SR_ST_INACTIVE;
155 sdi->vendor = g_strdup(PICKIT2_VENDOR_NAME);
156 sdi->model = g_strdup(PICKIT2_PRODUCT_NAME);
157 sdi->inst_type = SR_INST_USB;
159 sdi->connection_id = g_strdup(conn);
161 /* Create the logic channels group. */
162 cg = g_malloc0(sizeof(*cg));
163 sdi->channel_groups = g_slist_append(NULL, cg);
164 cg->name = g_strdup("Logic");
165 ch_count = ARRAY_SIZE(channel_names);
166 for (ch_idx = 0; ch_idx < ch_count; ch_idx++) {
167 ch = sr_channel_new(sdi, ch_idx, SR_CHANNEL_LOGIC,
168 TRUE, channel_names[ch_idx]);
169 cg->channels = g_slist_append(cg->channels, ch);
173 * Create the device context. Pre-select the highest
174 * samplerate and the deepest sample count available.
176 devc = g_malloc0(sizeof(*devc));
178 devc->samplerates = samplerates;
179 devc->num_samplerates = ARRAY_SIZE(samplerates);
180 devc->curr_samplerate_idx = devc->num_samplerates - 1;
181 devc->captureratios = captureratios;
182 devc->num_captureratios = ARRAY_SIZE(captureratios);
183 devc->curr_captureratio_idx = 0;
184 devc->sw_limits.limit_samples = PICKIT2_SAMPLE_COUNT;
187 return std_scan_complete(di, devices);
190 static int dev_open(struct sr_dev_inst *sdi)
192 struct sr_usb_dev_inst *usb;
193 struct dev_context *devc;
194 struct sr_dev_driver *di;
195 struct drv_context *drvc;
203 ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
207 if (libusb_kernel_driver_active(usb->devhdl, PICKIT2_USB_INTERFACE) == 1) {
208 ret = libusb_detach_kernel_driver(usb->devhdl, PICKIT2_USB_INTERFACE);
210 sr_err("Canot detach kernel driver: %s.",
211 libusb_error_name(ret));
214 devc->detached_kernel_driver = TRUE;
217 ret = libusb_claim_interface(usb->devhdl, PICKIT2_USB_INTERFACE);
219 sr_err("Cannot claim interface: %s.", libusb_error_name(ret));
226 static int dev_close(struct sr_dev_inst *sdi)
228 struct sr_usb_dev_inst *usb;
229 struct dev_context *devc;
240 ret = libusb_release_interface(usb->devhdl, PICKIT2_USB_INTERFACE);
242 sr_err("Cannot release interface: %s.", libusb_error_name(ret));
246 if (devc->detached_kernel_driver) {
247 ret = libusb_attach_kernel_driver(usb->devhdl, PICKIT2_USB_INTERFACE);
249 sr_err("Cannot attach kernel driver: %s.",
250 libusb_error_name(ret));
253 devc->detached_kernel_driver = FALSE;
256 libusb_close(usb->devhdl);
262 static int config_get(uint32_t key, GVariant **data,
263 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
265 struct dev_context *devc;
266 struct sr_usb_dev_inst *usb;
267 uint64_t rate, ratio;
271 devc = sdi ? sdi->priv : NULL;
278 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
280 case SR_CONF_SAMPLERATE:
281 rate = devc->samplerates[devc->curr_samplerate_idx];
282 *data = g_variant_new_uint64(rate);
284 case SR_CONF_LIMIT_SAMPLES:
285 return sr_sw_limits_config_get(&devc->sw_limits, key, data);
286 case SR_CONF_CAPTURE_RATIO:
287 ratio = devc->captureratios[devc->curr_captureratio_idx];
288 *data = g_variant_new_uint64(ratio);
295 static int config_set(uint32_t key, GVariant *data,
296 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
298 struct dev_context *devc;
303 devc = sdi ? sdi->priv : NULL;
306 case SR_CONF_SAMPLERATE:
309 idx = std_u64_idx(data, devc->samplerates, devc->num_samplerates);
312 devc->curr_samplerate_idx = idx;
314 case SR_CONF_CAPTURE_RATIO:
317 idx = std_u64_idx(data, devc->captureratios, devc->num_captureratios);
319 devc->curr_captureratio_idx = idx;
321 case SR_CONF_LIMIT_SAMPLES:
322 return sr_sw_limits_config_set(&devc->sw_limits, key, data);
328 static int config_list(uint32_t key, GVariant **data,
329 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
331 struct dev_context *devc;
333 devc = sdi ? sdi->priv : NULL;
336 case SR_CONF_SCAN_OPTIONS:
337 case SR_CONF_DEVICE_OPTIONS:
338 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
339 case SR_CONF_SAMPLERATE:
342 *data = std_gvar_samplerates(devc->samplerates, devc->num_samplerates);
344 case SR_CONF_TRIGGER_MATCH:
345 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
347 case SR_CONF_CAPTURE_RATIO:
348 *data = std_gvar_array_u64(ARRAY_AND_SIZE(captureratios));
355 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
357 struct dev_context *devc;
358 struct sr_trigger *trigger;
359 struct sr_trigger_stage *stage;
360 struct sr_trigger_match *match;
368 * Query triggers, translate the more complex caller spec to
369 * "flat" internal variables, to simplify the construction of
370 * the SETUP packet elsewhere. This driver supports a single
371 * stage, with match conditions for one or multiple channels.
373 memset(&devc->triggers, 0, sizeof(devc->triggers));
374 trigger = sr_session_trigger_get(sdi->session);
376 if (g_slist_length(trigger->stages) > 1)
378 stage = g_slist_nth_data(trigger->stages, 0);
381 for (l = stage->matches; l; l = l->next) {
385 if (!match->channel->enabled)
387 idx = match->channel->index;
388 devc->triggers[idx] = match->match;
390 sr_dbg("acq start: trigger specs: %x/%x/%x",
391 devc->triggers[0], devc->triggers[1],
394 devc->trigpos = trigger ? devc->curr_captureratio_idx : 0;
396 /* Have the SETUP packet sent, then poll for the status. */
397 devc->state = STATE_CONF;
398 ret = microchip_pickit2_setup_trigger(sdi);
400 devc->state = STATE_IDLE;
403 devc->state = STATE_WAIT;
405 std_session_send_df_header(sdi);
406 sr_session_source_add(sdi->session, -1, 0, 20,
407 microchip_pickit2_receive_data, (void *)sdi);
412 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
414 struct dev_context *devc;
417 if (devc->state < STATE_CONF)
421 * Keep up the acquisition until either data becomes available
422 * (according to the previously configured trigger condition),
423 * or until the user cancels the acquisition by pressing the
424 * device's button. This is a firmware limitation which the
425 * vendor software "suffers from" as well.
427 if (devc->state == STATE_WAIT) {
428 sr_err("Cannot terminate by software, need either data trigger or cancel button.");
432 if (devc->state > STATE_CONF) {
433 std_session_send_df_end(sdi);
435 sr_session_source_remove(sdi->session, -1);
436 devc->state = STATE_IDLE;
441 static struct sr_dev_driver microchip_pickit2_driver_info = {
442 .name = "microchip-pickit2",
443 .longname = PICKIT2_VENDOR_NAME " " PICKIT2_PRODUCT_NAME,
446 .cleanup = std_cleanup,
448 .dev_list = std_dev_list,
449 .dev_clear = std_dev_clear,
450 .config_get = config_get,
451 .config_set = config_set,
452 .config_list = config_list,
453 .dev_open = dev_open,
454 .dev_close = dev_close,
455 .dev_acquisition_start = dev_acquisition_start,
456 .dev_acquisition_stop = dev_acquisition_stop,
459 SR_REGISTER_DEV_DRIVER(microchip_pickit2_driver_info);