X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=2bd4709545cd656d93c99abb35f12fac779ede91;hb=c8f4624d9b265f63bc880df28bd9b1a7e29f1488;hp=b8f36fbfd4e77c967c7994b016f799efe3861b4c;hpb=6239c175c1b967b577f760032d326322dd4c4576;p=libsigrok.git diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c index b8f36fbf..2bd47095 100644 --- a/hardware/demo/demo.c +++ b/hardware/demo/demo.c @@ -2,6 +2,7 @@ * This file is part of the sigrok project. * * Copyright (C) 2010 Uwe Hermann + * Copyright (C) 2011 Olivier Fauchon * * 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 @@ -19,126 +20,133 @@ */ #include +#include #include #include +#include +#ifdef _WIN32 +#include +#include +#define pipe(fds) _pipe(fds, 4096, _O_BINARY) +#endif #include "config.h" -#define NUM_PROBES 8 -#define NUM_TRIGGER_STAGES 4 -#define TRIGGER_TYPES "01" +#define NUM_PROBES 8 +#define DEMONAME "Demo device" +/* size of chunks to send through the session bus */ +#define BUFSIZE 4096 + +/* Supported patterns which we can generate */ +enum { + /** + * Pattern which spells "sigrok" using '0's (with '1's as "background") + * when displayed using the 'bits' output format. + */ + PATTERN_SIGROK, + + /** + * Pattern which consists of (pseudo-)random values on all probes. + */ + PATTERN_RANDOM, + + /** + * Pattern which consists of incrementing numbers. + * TODO: Better description. + */ + PATTERN_INC, +}; -/* Software trigger implementation: positive values indicate trigger stage. */ -#define TRIGGER_FIRED -1 +/* FIXME: Should not be global. */ +GIOChannel *channels[2]; + +struct databag { + int pipe_fds[2]; + uint8_t sample_generator; + uint8_t thread_running; + uint64_t samples_counter; + int device_index; + gpointer session_device_id; + GTimer *timer; +}; static int capabilities[] = { - HWCAP_LOGIC_ANALYZER, - HWCAP_SAMPLERATE, - HWCAP_LIMIT_SAMPLES, + SR_HWCAP_LOGIC_ANALYZER, + SR_HWCAP_SAMPLERATE, + SR_HWCAP_PATTERN_MODE, + SR_HWCAP_LIMIT_SAMPLES, + SR_HWCAP_LIMIT_MSEC, + SR_HWCAP_CONTINUOUS, }; -/* Random selection of samplerates this "device" shall support. */ -static uint64_t supported_samplerates[] = { - KHZ(100), - KHZ(500), - MHZ(1), - MHZ(2), - MHZ(12), - MHZ(24), - 0, +static struct sr_samplerates samplerates = { + SR_HZ(1), + SR_GHZ(1), + SR_HZ(1), + NULL, }; -static struct samplerates samplerates = { - KHZ(100), - MHZ(24), - 0, - supported_samplerates, +static const char *pattern_strings[] = { + "random", + "incremental", + NULL, }; -/* TODO: All of these should go in a device-specific struct. */ -static uint64_t cur_samplerate = 0; -static uint64_t limit_samples = 0; -// static uint8_t probe_mask = 0; -// static uint8_t trigger_mask[NUM_TRIGGER_STAGES] = { 0 }; -// static uint8_t trigger_value[NUM_TRIGGER_STAGES] = { 0 }; -// static uint8_t trigger_buffer[NUM_TRIGGER_STAGES] = { 0 }; +static uint8_t pattern_sigrok[] = { + 0x4c, 0x92, 0x92, 0x92, 0x64, 0x00, 0x00, 0x00, + 0x82, 0xfe, 0xfe, 0x82, 0x00, 0x00, 0x00, 0x00, + 0x7c, 0x82, 0x82, 0x92, 0x74, 0x00, 0x00, 0x00, + 0xfe, 0x12, 0x12, 0x32, 0xcc, 0x00, 0x00, 0x00, + 0x7c, 0x82, 0x82, 0x82, 0x7c, 0x00, 0x00, 0x00, + 0xfe, 0x10, 0x28, 0x44, 0x82, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0xbe, 0xbe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; -// static int trigger_stage = TRIGGER_FIRED; +/* List of struct sr_device_instance, maintained by opendev()/closedev(). */ +static GSList *device_instances = NULL; +static uint64_t cur_samplerate = SR_KHZ(200); +static uint64_t limit_samples = 0; +static uint64_t limit_msec = 0; +static int default_pattern = PATTERN_SIGROK; +static GThread *my_thread; +static int thread_running; -static int hw_set_configuration(int device_index, int capability, void *value); static void hw_stop_acquisition(int device_index, gpointer session_device_id); -#if 0 -static int configure_probes(GSList *probes) +static int hw_init(const char *deviceinfo) { - struct probe *probe; - GSList *l; - int probe_bit, stage, i; - char *tc; - - probe_mask = 0; - for (i = 0; i < NUM_TRIGGER_STAGES; i++) { - trigger_mask[i] = 0; - trigger_value[i] = 0; - } + struct sr_device_instance *sdi; - stage = -1; - for (l = probes; l; l = l->next) { - probe = (struct probe *)l->data; - if (!(probe->enabled)) - continue; - probe_bit = 1 << (probe->index - 1); - probe_mask |= probe_bit; - if (!(probe->trigger)) - continue; - - stage = 0; - for (tc = probe->trigger; *tc; tc++) { - trigger_mask[stage] |= probe_bit; - if (*tc == '1') - trigger_value[stage] |= probe_bit; - stage++; - if (stage > NUM_TRIGGER_STAGES) - return SIGROK_ERR; - } - } - - if (stage == -1) - /* - * We didn't configure any triggers, make sure acquisition - * doesn't wait for any. - */ - trigger_stage = TRIGGER_FIRED; - else - trigger_stage = 0; + /* Avoid compiler warnings. */ + deviceinfo = deviceinfo; - return SIGROK_OK; -} -#endif + sdi = sr_device_instance_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL); + if (!sdi) + return 0; -static int hw_init(char *deviceinfo) -{ - /* Avoid compiler warning. */ - deviceinfo = deviceinfo; + device_instances = g_slist_append(device_instances, sdi); - /* Nothing needed so far. */ - return 1; /* FIXME? */ + return 1; } static int hw_opendev(int device_index) { - /* Avoid compiler warning. */ + /* Avoid compiler warnings. */ device_index = device_index; /* Nothing needed so far. */ - return SIGROK_OK; + + return SR_OK; } -static void hw_closedev(int device_index) +static int hw_closedev(int device_index) { - /* Avoid compiler warning. */ + /* Avoid compiler warnings. */ device_index = device_index; /* Nothing needed so far. */ + + return SR_OK; } static void hw_cleanup(void) @@ -148,28 +156,28 @@ static void hw_cleanup(void) static void *hw_get_device_info(int device_index, int device_info_id) { + struct sr_device_instance *sdi; void *info = NULL; - /* Avoid compiler warning. */ - device_index = device_index; + if (!(sdi = sr_get_device_instance(device_instances, device_index))) + return NULL; switch (device_info_id) { - case DI_INSTANCE: - /// info = sdi; - /* TODO */ + case SR_DI_INSTANCE: + info = sdi; break; - case DI_NUM_PROBES: + case SR_DI_NUM_PROBES: info = GINT_TO_POINTER(NUM_PROBES); break; - case DI_SAMPLERATES: + case SR_DI_SAMPLERATES: info = &samplerates; break; - case DI_TRIGGER_TYPES: - info = TRIGGER_TYPES; - break; - case DI_CUR_SAMPLERATE: + case SR_DI_CUR_SAMPLERATE: info = &cur_samplerate; break; + case SR_DI_PATTERNMODES: + info = &pattern_strings; + break; } return info; @@ -177,10 +185,10 @@ static void *hw_get_device_info(int device_index, int device_info_id) static int hw_get_status(int device_index) { - /* Avoid compiler warning. */ + /* Avoid compiler warnings. */ device_index = device_index; - return 0; /* FIXME */ + return SR_ST_ACTIVE; } static int *hw_get_capabilities(void) @@ -191,142 +199,255 @@ static int *hw_get_capabilities(void) static int hw_set_configuration(int device_index, int capability, void *value) { int ret; + char *stropt; - /* Avoid compiler warning. */ + /* Avoid compiler warnings. */ device_index = device_index; - if (capability == HWCAP_SAMPLERATE) { + if (capability == SR_HWCAP_PROBECONFIG) { + /* Nothing to do, but must be supported */ + ret = SR_OK; + } else if (capability == SR_HWCAP_SAMPLERATE) { cur_samplerate = *(uint64_t *)value; - ret = SIGROK_OK; - } else if (capability == HWCAP_PROBECONFIG) { - // ret = configure_probes((GSList *) value); - ret = SIGROK_ERR; - } else if (capability == HWCAP_LIMIT_SAMPLES) { - limit_samples = strtoull(value, NULL, 10); - ret = SIGROK_OK; + sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__, + cur_samplerate); + ret = SR_OK; + } else if (capability == SR_HWCAP_LIMIT_SAMPLES) { + limit_samples = *(uint64_t *)value; + sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__, + limit_samples); + ret = SR_OK; + } else if (capability == SR_HWCAP_LIMIT_MSEC) { + limit_msec = *(uint64_t *)value; + sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__, + limit_msec); + ret = SR_OK; + } else if (capability == SR_HWCAP_PATTERN_MODE) { + stropt = value; + if (!strcmp(stropt, "random")) { + default_pattern = PATTERN_RANDOM; + ret = SR_OK; + } else if (!strcmp(stropt, "incremental")) { + default_pattern = PATTERN_INC; + ret = SR_OK; + } else { + ret = SR_ERR; + } + sr_dbg("demo: %s: setting pattern to %d", __func__, + default_pattern); } else { - ret = SIGROK_ERR; + ret = SR_ERR; } return ret; } -static int hw_start_acquisition(int device_index, gpointer session_device_id) +static void samples_generator(uint8_t *buf, uint64_t size, void *data) { - struct datafeed_packet *packet; - struct datafeed_header *header; - unsigned char *buf; + static uint64_t p = 0; + struct databag *mydata = data; + uint64_t i; + + memset(buf, 0, size); + + switch (mydata->sample_generator) { + case PATTERN_SIGROK: + for (i = 0; i < size; i++) { + *(buf + i) = ~(pattern_sigrok[p] >> 1); + if (++p == 64) + p = 0; + } + break; + case PATTERN_RANDOM: /* Random */ + for (i = 0; i < size; i++) + *(buf + i) = (uint8_t)(rand() & 0xff); + break; + case PATTERN_INC: /* Simple increment */ + for (i = 0; i < size; i++) + *(buf + i) = i; + break; + } +} - /* Avoid compiler warning. */ - device_index = device_index; +/* Thread function */ +static void thread_func(void *data) +{ + struct databag *mydata = data; + uint8_t buf[BUFSIZE]; + uint64_t nb_to_send = 0; + int bytes_written; - packet = malloc(sizeof(struct datafeed_packet)); - header = malloc(sizeof(struct datafeed_header)); - buf = malloc(2048); - if (!packet || !header || !buf) - return SIGROK_ERR_MALLOC; + double time_cur, time_last, time_diff; - /* FIXME */ - memset(buf, 0x55, 2048); + time_last = g_timer_elapsed(mydata->timer, NULL); - packet->type = DF_HEADER; - packet->length = sizeof(struct datafeed_header); - packet->payload = (unsigned char *)header; - header->feed_version = 1; - gettimeofday(&header->starttime, NULL); - header->samplerate = cur_samplerate; - header->protocol_id = PROTO_RAW; - header->num_probes = NUM_PROBES; - session_bus(session_device_id, packet); - free(header); - free(packet); + while (thread_running) { + /* Rate control */ + time_cur = g_timer_elapsed(mydata->timer, NULL); - return SIGROK_OK; -} + time_diff = time_cur - time_last; + time_last = time_cur; -#if 0 -void receive_transfer(struct libusb_transfer *transfer) -{ - static int num_samples = 0; - static int empty_transfer_count = 0; - struct datafeed_packet packet; - void *user_data; - int cur_buflen, trigger_offset, i; - unsigned char *cur_buf, *new_buf; - - g_message("receive_transfer(): status %d received %d bytes", - transfer->status, transfer->actual_length); - - /* Save incoming transfer before reusing the transfer struct. */ - cur_buf = transfer->buffer; - cur_buflen = transfer->actual_length; - user_data = transfer->user_data; - - /* Fire off a new request. */ - new_buf = g_malloc(4096); - transfer->buffer = new_buf; - transfer->length = 4096; - if (libusb_submit_transfer(transfer) != 0) { - /* TODO: Stop session? */ - g_warning("eek"); - } + nb_to_send = cur_samplerate * time_diff; + + if (limit_samples) + nb_to_send = MIN(nb_to_send, + limit_samples - mydata->samples_counter); + + /* Make sure we don't overflow. */ + nb_to_send = MIN(nb_to_send, BUFSIZE); + + if (nb_to_send) { + samples_generator(buf, nb_to_send, data); + mydata->samples_counter += nb_to_send; + + g_io_channel_write_chars(channels[1], (gchar *)&buf, + nb_to_send, (gsize *)&bytes_written, NULL); + } - trigger_offset = 0; - if (trigger_stage >= 0) { - for (i = 0; i < cur_buflen; i++) { - trigger_helper(i, cur_buf, &packet, user_data, - &trigger_offset); + /* Check if we're done. */ + if ((limit_msec && time_cur * 1000 > limit_msec) || + (limit_samples && mydata->samples_counter >= limit_samples)) + { + close(mydata->pipe_fds[1]); + thread_running = 0; } + + g_usleep(10); } +} - if (trigger_stage == TRIGGER_FIRED) { - /* Send the incoming transfer to the session bus. */ - packet.type = DF_LOGIC8; - packet.length = cur_buflen - trigger_offset; - packet.payload = cur_buf + trigger_offset; - session_bus(user_data, &packet); - free(cur_buf); - - num_samples += cur_buflen; - if ((unsigned int)num_samples > limit_samples) { - hw_stop_acquisition(-1, user_data); +/* Callback handling data */ +static int receive_data(int fd, int revents, void *user_data) +{ + struct sr_datafeed_packet packet; + char c[BUFSIZE]; + gsize z; + + /* Avoid compiler warnings. */ + fd = fd; + revents = revents; + + do { + g_io_channel_read_chars(channels[0], + (gchar *)&c, BUFSIZE, &z, NULL); + + if (z > 0) { + packet.type = SR_DF_LOGIC; + packet.length = z; + packet.unitsize = 1; + packet.payload = c; + sr_session_bus(user_data, &packet); } - } else { - /* - * TODO: Buffer pre-trigger data in capture - * ratio-sized buffer. - */ + } while (z > 0); + + if (!thread_running && z <= 0) + { + /* Make sure we don't receive more packets */ + g_io_channel_close(channels[0]); + + /* Send last packet. */ + packet.type = SR_DF_END; + sr_session_bus(user_data, &packet); + + return FALSE; } + + return TRUE; } -#endif -/* This stops acquisition on ALL devices, ignoring device_index. */ -static void hw_stop_acquisition(int device_index, gpointer session_device_id) +static int hw_start_acquisition(int device_index, gpointer session_device_id) { - struct datafeed_packet packet; + struct sr_datafeed_packet *packet; + struct sr_datafeed_header *header; + struct databag *mydata; + + /* TODO: 'mydata' is never g_free()'d? */ + if (!(mydata = g_try_malloc(sizeof(struct databag)))) { + sr_err("demo: %s: mydata malloc failed", __func__); + return SR_ERR_MALLOC; + } - /* QUICK HACK */ - device_index = device_index; + mydata->sample_generator = default_pattern; + mydata->session_device_id = session_device_id; + mydata->device_index = device_index; + mydata->samples_counter = 0; + + if (pipe(mydata->pipe_fds)) + return SR_ERR; + + channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]); + channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]); + + /* Set channel encoding to binary (default is UTF-8). */ + g_io_channel_set_encoding(channels[0], NULL, NULL); + g_io_channel_set_encoding(channels[1], NULL, NULL); + + /* Make channels to unbuffered. */ + g_io_channel_set_buffered(channels[0], FALSE); + g_io_channel_set_buffered(channels[1], FALSE); + + sr_source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40, + receive_data, session_device_id); + + /* Run the demo thread. */ + g_thread_init(NULL); + /* this needs to be done between g_thread_init() and g_thread_create() */ + mydata->timer = g_timer_new(); + thread_running = 1; + my_thread = + g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL); + if (!my_thread) + return SR_ERR; + + if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) { + sr_err("demo: %s: packet malloc failed", __func__); + return SR_ERR_MALLOC; + } + + if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) { + sr_err("demo: %s: header malloc failed", __func__); + return SR_ERR_MALLOC; + } - packet.type = DF_END; - session_bus(session_device_id, &packet); + packet->type = SR_DF_HEADER; + packet->length = sizeof(struct sr_datafeed_header); + packet->payload = (unsigned char *)header; + header->feed_version = 1; + gettimeofday(&header->starttime, NULL); + header->samplerate = cur_samplerate; + header->protocol_id = SR_PROTO_RAW; + header->num_logic_probes = NUM_PROBES; + header->num_analog_probes = 0; + sr_session_bus(session_device_id, packet); + g_free(header); + g_free(packet); + + return SR_OK; +} - /// receive_transfer(NULL); +static void hw_stop_acquisition(int device_index, gpointer session_device_id) +{ + /* Avoid compiler warnings. */ + device_index = device_index; + session_device_id = session_device_id; - /* TODO: Need to cancel and free any queued up transfers. */ + /* Stop generate thread. */ + thread_running = 0; } -struct device_plugin demo_plugin_info = { - "demo", - 1, - hw_init, - hw_cleanup, - hw_opendev, - hw_closedev, - hw_get_device_info, - hw_get_status, - hw_get_capabilities, - hw_set_configuration, - hw_start_acquisition, - hw_stop_acquisition, +struct sr_device_plugin demo_plugin_info = { + .name = "demo", + .longname = "Demo driver and pattern generator", + .api_version = 1, + .init = hw_init, + .cleanup = hw_cleanup, + .opendev = hw_opendev, + .closedev = hw_closedev, + .get_device_info = hw_get_device_info, + .get_status = hw_get_status, + .get_capabilities = hw_get_capabilities, + .set_configuration = hw_set_configuration, + .start_acquisition = hw_start_acquisition, + .stop_acquisition = hw_stop_acquisition, };