src/hardware/beaglelogic/beaglelogic_native.c \
src/hardware/beaglelogic/beaglelogic_tcp.c
endif
-if HW_BRYMEN_DMM
-src_libdrivers_la_SOURCES += \
- src/hardware/brymen-dmm/parser.c \
- src/hardware/brymen-dmm/protocol.h \
- src/hardware/brymen-dmm/protocol.c \
- src/hardware/brymen-dmm/api.c
-endif
if HW_CEM_DT_885X
src_libdrivers_la_SOURCES += \
src/hardware/cem-dt-885x/protocol.h \
- atten-pps3xxx
- baylibre-acme
- beaglelogic
- - brymen-dmm
- cem-dt-885x
- center-3xx (including all subdrivers)
- chronovu-la
SR_DRIVER([Atten PPS3xxx], [atten-pps3xxx], [serial_comm])
SR_DRIVER([BayLibre ACME], [baylibre-acme], [sys_timerfd_h])
SR_DRIVER([BeagleLogic], [beaglelogic], [sys_mman_h sys_ioctl_h])
-SR_DRIVER([Brymen DMM], [brymen-dmm], [serial_comm])
SR_DRIVER([CEM DT-885x], [cem-dt-885x], [serial_comm])
SR_DRIVER([Center 3xx], [center-3xx], [serial_comm])
SR_DRIVER([ChronoVu LA], [chronovu-la], [libusb libftdi])
+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@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
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <config.h>
-#include "protocol.h"
-
-static const uint32_t scanopts[] = {
- SR_CONF_CONN,
- SR_CONF_SERIALCOMM,
-};
-
-static const uint32_t drvopts[] = {
- SR_CONF_MULTIMETER,
-};
-
-static const uint32_t devopts[] = {
- SR_CONF_CONTINUOUS,
- SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
- SR_CONF_LIMIT_MSEC | SR_CONF_SET,
-};
-
-static GSList *brymen_scan(struct sr_dev_driver *di, const char *conn,
- const char *serialcomm)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
- int rts_toggle_delay_us;
- GSList *devices;
- int ret;
- uint8_t buf[128];
- size_t len;
-
- serial = sr_serial_dev_inst_new(conn, serialcomm);
-
- if (serial_open(serial, SERIAL_RDWR) != SR_OK)
- return NULL;
- /*
- * The device requires an RTS *pulse* before communication.
- * The vendor's documentation recommends the following sequence:
- * Open the COM port, wait for 100ms, set RTS=1, wait for 100ms,
- * set RTS=0, wait for 100ms, set RTS=1, configure bitrate and
- * frame format, transmit request data, receive response data.
- */
- rts_toggle_delay_us = 100 * 1000; /* 100ms */
- g_usleep(rts_toggle_delay_us);
- serial_set_handshake(serial, 1, -1);
- g_usleep(rts_toggle_delay_us);
- serial_set_handshake(serial, 0, -1);
- g_usleep(rts_toggle_delay_us);
- serial_set_handshake(serial, 1, -1);
- g_usleep(rts_toggle_delay_us);
-
- sr_info("Probing port %s.", conn);
-
- devices = NULL;
-
- /* Request reading */
- if ((ret = brymen_packet_request(serial)) < 0) {
- sr_err("Unable to send command: %d.", ret);
- goto scan_cleanup;
- }
-
- len = sizeof(buf);
- ret = brymen_stream_detect(serial, buf, &len, brymen_packet_length,
- brymen_packet_is_valid, 1000, 9600);
- if (ret != SR_OK)
- goto scan_cleanup;
-
- sr_info("Found device on port %s.", conn);
-
- sdi = g_malloc0(sizeof(struct sr_dev_inst));
- sdi->status = SR_ST_INACTIVE;
- sdi->vendor = g_strdup("Brymen");
- sdi->model = g_strdup("BM85x");
- devc = g_malloc0(sizeof(struct dev_context));
- sr_sw_limits_init(&devc->sw_limits);
- sdi->inst_type = SR_INST_SERIAL;
- sdi->conn = serial;
- sdi->priv = devc;
- sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
- devices = g_slist_append(devices, sdi);
-
-scan_cleanup:
- serial_close(serial);
-
- return std_scan_complete(di, devices);
-}
-
-static GSList *scan(struct sr_dev_driver *di, GSList *options)
-{
- struct sr_config *src;
- GSList *devices, *l;
- const char *conn, *serialcomm;
-
- devices = NULL;
-
- /*
- * BEWARE! Default 'conn' is not desirable when the device cannot
- * reliably get detected. Insist that users specify the port.
- */
- conn = NULL;
- serialcomm = "9600/8n1/dtr=1/rts=1";
- 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;
-
- devices = brymen_scan(di, conn, serialcomm);
-
- return devices;
-}
-
-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;
-
- (void)cg;
-
- devc = sdi->priv;
-
- return sr_sw_limits_config_set(&devc->sw_limits, key, data);
-}
-
-static int config_list(uint32_t key, GVariant **data,
- const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
-{
- return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
-}
-
-static int dev_acquisition_start(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
-
- devc = sdi->priv;
-
- sr_sw_limits_acquisition_start(&devc->sw_limits);
- std_session_send_df_header(sdi);
-
- serial = sdi->conn;
- serial_source_add(sdi->session, serial, G_IO_IN, 50,
- brymen_dmm_receive_data, (void *)sdi);
-
- return SR_OK;
-}
-
-static struct sr_dev_driver brymen_bm857_driver_info = {
- .name = "brymen-bm857",
- .longname = "Brymen BM857",
- .api_version = 1,
- .init = std_init,
- .cleanup = std_cleanup,
- .scan = scan,
- .dev_list = std_dev_list,
- .dev_clear = std_dev_clear,
- .config_get = NULL,
- .config_set = config_set,
- .config_list = config_list,
- .dev_open = std_serial_dev_open,
- .dev_close = std_serial_dev_close,
- .dev_acquisition_start = dev_acquisition_start,
- .dev_acquisition_stop = std_serial_dev_acquisition_stop,
- .context = NULL,
-};
-SR_REGISTER_DEV_DRIVER(brymen_bm857_driver_info);
+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@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
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <config.h>
-#include "protocol.h"
-
-#define MAX_PACKET_LEN 22
-
-/* Flags passed from the DMM. */
-struct brymen_flags {
- gboolean is_low_batt, is_decibel, is_duty_cycle, is_hertz, is_amp;
- gboolean is_beep, is_ohm, is_fahrenheit, is_celsius, is_capacitance;
- gboolean is_diode, is_volt, is_dc, is_ac;
-};
-
-struct bm850_command {
- uint8_t dle;
- uint8_t stx;
- uint8_t cmd;
- uint8_t arg[2];
- uint8_t checksum;
- uint8_t dle2;
- uint8_t etx;
-};
-
-struct brymen_header {
- uint8_t dle;
- uint8_t stx;
- uint8_t cmd;
- uint8_t len;
-};
-
-struct brymen_tail {
- uint8_t checksum;
- uint8_t dle;
- uint8_t etx;
-};
-
-/*
- * We only have one command because we only support the BM-857. However, the
- * driver is easily extensible to support more models, as the protocols are
- * very similar.
- */
-enum {
- BM_CMD_REQUEST_READING = 0x00,
-};
-
-static int bm_send_command(uint8_t command, uint8_t arg1, uint8_t arg2,
- struct sr_serial_dev_inst *serial)
-{
- struct bm850_command cmdout;
- int written;
-
- cmdout.dle = 0x10;
- cmdout.stx = 0x02;
- cmdout.cmd = command;
- cmdout.arg[0] = arg1;
- cmdout.arg[1] = arg2;
- cmdout.checksum = arg1 ^ arg2;
- cmdout.dle2 = 0x10;
- cmdout.etx = 0x03;
-
- /* TODO: How to compute the checksum? Hardware seems to ignore it. */
-
- /* Request reading. */
- written = serial_write_blocking(serial, &cmdout, sizeof(cmdout),
- serial_timeout(serial, sizeof(cmdout)));
- if (written != sizeof(cmdout))
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV int brymen_packet_request(struct sr_serial_dev_inst *serial)
-{
- return bm_send_command(BM_CMD_REQUEST_READING, 0, 0, serial);
-}
-
-SR_PRIV int brymen_packet_length(const uint8_t *buf, int *len)
-{
- struct brymen_header *hdr;
- int packet_len;
- size_t buflen;
-
- buflen = *len;
- hdr = (void *)buf;
-
- /* Did we receive a complete header yet? */
- if (buflen < sizeof(*hdr))
- return PACKET_NEED_MORE_DATA;
-
- if (hdr->dle != 0x10 || hdr->stx != 0x02)
- return PACKET_INVALID_HEADER;
-
- /* Our packet includes the header, the payload, and the tail. */
- packet_len = sizeof(*hdr) + hdr->len + sizeof(struct brymen_tail);
-
- /* In case we pick up an invalid header, limit our search. */
- if (packet_len > MAX_PACKET_LEN) {
- sr_spew("Header specifies an invalid payload length: %i.",
- hdr->len);
- return PACKET_INVALID_HEADER;
- }
-
- *len = packet_len;
- sr_spew("Expecting a %d-byte packet.", *len);
- return PACKET_HEADER_OK;
-}
-
-SR_PRIV gboolean brymen_packet_is_valid(const uint8_t *buf)
-{
- struct brymen_header *hdr;
- struct brymen_tail *tail;
- int i;
- uint8_t chksum = 0;
- uint8_t *payload;
-
- payload = (uint8_t *)(buf + sizeof(struct brymen_header));
-
- hdr = (void *)buf;
- tail = (void *)(payload + hdr->len);
-
- for (i = 0; i< hdr->len; i++)
- chksum ^= payload[i];
-
- if (tail->checksum != chksum) {
- sr_dbg("Packet has invalid checksum 0x%.2x. Expected 0x%.2x.",
- chksum, tail->checksum);
- return FALSE;
- }
-
- return TRUE;
-}
-
-static int parse_value(const char *txt, size_t len, float *floatval)
-{
- const char *txt_end;
- char c, buf[32], *dst;
- int ret;
-
- /*
- * The input text is not NUL terminated, the checksum follows
- * the value text field. Spaces may interfere with the text to
- * number conversion, especially with exponent parsing. Copy the
- * input data to a terminated text buffer and strip spaces in the
- * process, before running ASCIIZ string operations.
- */
- if (len >= sizeof(buf)) {
- sr_err("Insufficient text conversion buffer size.");
- return SR_ERR_BUG;
- }
- txt_end = txt + len;
- dst = &buf[0];
- while (txt < txt_end && *txt) {
- c = *txt++;
- if (c == ' ')
- continue;
- *dst++ = c;
- }
- *dst = '\0';
-
- /* Check for overflow, or get the number value. */
- if (strstr(buf, "+OL")) {
- *floatval = +INFINITY;
- return SR_OK;
- }
- if (strstr(buf, "-OL")) {
- *floatval = -INFINITY;
- return SR_OK;
- }
- if (strstr(buf, "OL")) {
- *floatval = INFINITY;
- return SR_OK;
- }
- ret = sr_atof_ascii(buf, floatval);
- if (ret != SR_OK)
- return ret;
-
- return SR_OK;
-}
-
-static void parse_flags(const uint8_t *bfunc, struct brymen_flags *info)
-{
- info->is_low_batt = (bfunc[3] & (1 << 7)) != 0;
-
- info->is_decibel = (bfunc[1] & (1 << 5)) != 0;
- info->is_duty_cycle = (bfunc[1] & (1 << 3)) != 0;
- info->is_hertz = (bfunc[1] & (1 << 2)) != 0;
- info->is_amp = (bfunc[1] & (1 << 1)) != 0;
- info->is_beep = (bfunc[1] & (1 << 0)) != 0;
-
- info->is_ohm = (bfunc[0] & (1 << 7)) != 0;
- info->is_fahrenheit = (bfunc[0] & (1 << 6)) != 0;
- info->is_celsius = (bfunc[0] & (1 << 5)) != 0;
- info->is_diode = (bfunc[0] & (1 << 4)) != 0;
- info->is_capacitance = (bfunc[0] & (1 << 3)) != 0;
- info->is_volt = (bfunc[0] & (1 << 2)) != 0;
- info->is_dc = (bfunc[0] & (1 << 1)) != 0;
- info->is_ac = (bfunc[0] & (1 << 0)) != 0;
-}
-
-SR_PRIV int brymen_parse(const uint8_t *buf, float *floatval,
- struct sr_datafeed_analog *analog, void *info)
-{
- struct brymen_flags flags;
- struct brymen_header *hdr;
- uint8_t *bfunc;
- const char *txt;
- int txtlen;
- char *p;
- char *unit;
- int ret;
-
- (void)info;
-
- hdr = (void *)buf;
- bfunc = (uint8_t *)(buf + sizeof(struct brymen_header));
- txt = (const char *)&bfunc[4];
- txtlen = hdr->len - 4;
- sr_dbg("DMM bfunc: %02x %02x %02x %02x, text '%.*s'",
- bfunc[3], bfunc[2], bfunc[1], bfunc[0], txtlen, txt);
-
- memset(&flags, 0, sizeof(flags));
- parse_flags(bfunc, &flags);
- if (flags.is_decibel && flags.is_ohm) {
- /*
- * The reference impedance for the dBm function is in an
- * unexpected format. Naive conversion of non-space chars
- * gives incorrect results. Isolate the 4..1200 Ohms value
- * instead, ignore the "0." and exponent parts of the
- * response text.
- */
- if (strncmp(txt, " 0.", strlen(" 0.")) == 0 && strstr(txt, " E")) {
- txt = &txt[strlen(" 0.")];
- txtlen -= strlen(" 0.");
- p = strchr(txt, 'E');
- if (p)
- *p = '\0';
- }
- }
- if (flags.is_fahrenheit || flags.is_celsius) {
- /*
- * The value text in temperature mode includes the C/F
- * suffix between the mantissa and the exponent, which
- * breaks the text to number conversion. Example data:
- * " 0.0217CE+3". Remove the C/F unit identifier.
- */
- unit = strchr(txt, flags.is_fahrenheit ? 'F' : 'C');
- if (!unit)
- return SR_ERR;
- *unit = ' ';
- }
- ret = parse_value(txt, txtlen, floatval);
- sr_dbg("floatval: %f, ret %d", *floatval, ret);
- if (ret != SR_OK)
- return SR_ERR;
-
- analog->meaning->mqflags = 0;
- if (flags.is_volt) {
- analog->meaning->mq = SR_MQ_VOLTAGE;
- analog->meaning->unit = SR_UNIT_VOLT;
- }
- if (flags.is_amp) {
- analog->meaning->mq = SR_MQ_CURRENT;
- analog->meaning->unit = SR_UNIT_AMPERE;
- }
- if (flags.is_ohm) {
- if (flags.is_decibel)
- analog->meaning->mq = SR_MQ_RESISTANCE;
- else if (flags.is_beep)
- analog->meaning->mq = SR_MQ_CONTINUITY;
- else
- analog->meaning->mq = SR_MQ_RESISTANCE;
- analog->meaning->unit = SR_UNIT_OHM;
- }
- if (flags.is_hertz) {
- analog->meaning->mq = SR_MQ_FREQUENCY;
- analog->meaning->unit = SR_UNIT_HERTZ;
- }
- if (flags.is_duty_cycle) {
- analog->meaning->mq = SR_MQ_DUTY_CYCLE;
- analog->meaning->unit = SR_UNIT_PERCENTAGE;
- }
- if (flags.is_capacitance) {
- analog->meaning->mq = SR_MQ_CAPACITANCE;
- analog->meaning->unit = SR_UNIT_FARAD;
- }
- if (flags.is_fahrenheit) {
- analog->meaning->mq = SR_MQ_TEMPERATURE;
- analog->meaning->unit = SR_UNIT_FAHRENHEIT;
- }
- if (flags.is_celsius) {
- analog->meaning->mq = SR_MQ_TEMPERATURE;
- analog->meaning->unit = SR_UNIT_CELSIUS;
- }
- if (flags.is_capacitance) {
- analog->meaning->mq = SR_MQ_CAPACITANCE;
- analog->meaning->unit = SR_UNIT_FARAD;
- }
-
- /*
- * The high-end Brymen models have a configurable reference
- * impedance for dBm measurements. When the meter's function
- * is entered, or when the reference impedance is changed, the
- * meter sends one packet with the value of the new reference.
- * Both decibel and ohm flags are set in this case, so we must
- * be careful to not clobber the resistance value from above,
- * and only provide dBm when the measurement is shown and not
- * its reference.
- *
- * The meter's response values also use an unexpected scale
- * (always off by factor 1000, as if it was Watts not mW).
- *
- * Example responses:
- * bfunc: 00 00 20 80, text ' 0. 800 E+1' (reference)
- * bfunc: 00 00 20 00, text '-0.3702 E-1' (measurement)
- */
- if (flags.is_decibel && !flags.is_ohm) {
- analog->meaning->mq = SR_MQ_POWER;
- analog->meaning->unit = SR_UNIT_DECIBEL_MW;
- *floatval *= 1000;
- }
-
- if (flags.is_diode)
- analog->meaning->mqflags |= SR_MQFLAG_DIODE | SR_MQFLAG_DC;
- /* We can have both AC+DC in a single measurement. */
- if (flags.is_ac)
- analog->meaning->mqflags |= SR_MQFLAG_AC;
- if (flags.is_dc)
- analog->meaning->mqflags |= SR_MQFLAG_DC;
-
- if (flags.is_low_batt)
- sr_warn("Low battery!");
-
- return SR_OK;
-}
+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@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
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <config.h>
-#include "protocol.h"
-
-static void handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi)
-{
- float floatval;
- struct dev_context *devc;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct sr_analog_encoding encoding;
- struct sr_analog_meaning meaning;
- struct sr_analog_spec spec;
-
- devc = sdi->priv;
-
- /* TODO: Use proper 'digits' value for this device (and its modes). */
- sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
-
- analog.num_samples = 1;
- analog.meaning->mq = 0;
-
- if (brymen_parse(buf, &floatval, &analog, NULL) != SR_OK)
- return;
- analog.data = &floatval;
-
- analog.meaning->channels = sdi->channels;
-
- if (analog.meaning->mq != 0) {
- /* Got a measurement. */
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- sr_session_send(sdi, &packet);
- sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
- }
-}
-
-static void handle_new_data(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- int len, status, offset = 0;
- struct sr_serial_dev_inst *serial;
-
- devc = sdi->priv;
- serial = sdi->conn;
-
- /* Try to get as much data as the buffer can hold. */
- len = DMM_BUFSIZE - devc->buflen;
- len = serial_read_nonblocking(serial, devc->buf + devc->buflen, len);
- if (len < 1) {
- sr_err("Serial port read error: %d.", len);
- return;
- }
- devc->buflen += len;
- status = PACKET_INVALID_HEADER;
-
- /* Now look for packets in that data. */
- while (status != PACKET_NEED_MORE_DATA) {
- /* We don't have a header, look for one. */
- if (devc->next_packet_len == 0) {
- len = devc->buflen - offset;
- status = brymen_packet_length(devc->buf + offset, &len);
- if (status == PACKET_HEADER_OK) {
- /* We know how large the packet will be. */
- devc->next_packet_len = len;
- } else if (status == PACKET_NEED_MORE_DATA) {
- /* We didn't yet receive the full header. */
- devc->next_packet_len = 0;
- break;
- } else {
- /* Invalid header. Move on. */
- devc->next_packet_len = 0;
- offset++;
- continue;
- }
- }
-
- /* We know how the packet size, but did we receive all of it? */
- if (devc->buflen - offset < devc->next_packet_len)
- break;
-
- /* We should have a full packet here, so we can check it. */
- if (brymen_packet_is_valid(devc->buf + offset)) {
- handle_packet(devc->buf + offset, sdi);
- offset += devc->next_packet_len;
- } else {
- offset++;
- }
-
- /* We are done with this packet. Look for a new one. */
- devc->next_packet_len = 0;
- }
-
- /* If we have any data left, move it to the beginning of our buffer. */
- memmove(devc->buf, devc->buf + offset, devc->buflen - offset);
- devc->buflen -= offset;
-}
-
-SR_PRIV int brymen_dmm_receive_data(int fd, int revents, void *cb_data)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
- int ret;
-
- (void)fd;
-
- if (!(sdi = cb_data))
- return TRUE;
-
- if (!(devc = sdi->priv))
- return TRUE;
-
- serial = sdi->conn;
-
- if (revents == G_IO_IN) {
- /* Serial data arrived. */
- handle_new_data(sdi);
- } else {
- /* Timeout, send another packet request. */
- if ((ret = brymen_packet_request(serial)) < 0) {
- sr_err("Failed to request packet: %d.", ret);
- return FALSE;
- }
- }
-
- if (sr_sw_limits_check(&devc->sw_limits))
- sr_dev_acquisition_stop(sdi);
-
- return TRUE;
-}
-
-/**
- * Try to find a valid packet in a serial data stream.
- *
- * @param serial Previously initialized serial port structure.
- * @param buf Buffer containing the bytes to write.
- * @param buflen Size of the buffer.
- * @param get_packet_size Callback that assesses the size of incoming packets.
- * @param is_valid Callback that assesses whether the packet is valid or not.
- * @param timeout_ms The timeout after which, if no packet is detected, to
- * abort scanning.
- * @param baudrate The baudrate of the serial port. This parameter is not
- * critical, but it helps fine tune the serial port polling
- * delay.
- *
- * @return SR_OK if a valid packet is found within the given timeout,
- * SR_ERR upon failure.
- */
-SR_PRIV int brymen_stream_detect(struct sr_serial_dev_inst *serial,
- uint8_t *buf, size_t *buflen,
- packet_length_t get_packet_size,
- packet_valid_callback is_valid,
- uint64_t timeout_ms, int baudrate)
-{
- int64_t start, time, byte_delay_us;
- size_t ibuf, i, maxlen;
- ssize_t len, stream_len;
- int packet_len;
- int status;
-
- maxlen = *buflen;
-
- sr_dbg("Detecting packets on %s (timeout = %" PRIu64
- "ms, baudrate = %d).", serial->port, timeout_ms, baudrate);
-
- /* Assume 8n1 transmission. That is 10 bits for every byte. */
- byte_delay_us = 10 * ((1000 * 1000) / baudrate);
- start = g_get_monotonic_time();
-
- packet_len = i = ibuf = len = 0;
- while (ibuf < maxlen) {
- len = serial_read_nonblocking(serial, &buf[ibuf], maxlen - ibuf);
- if (len > 0) {
- ibuf += len;
- sr_spew("Read %zd bytes.", len);
- }
-
- time = g_get_monotonic_time() - start;
- time /= 1000;
-
- stream_len = ibuf - i;
- if (stream_len > 0 && packet_len == 0) {
- /* How large of a packet are we expecting? */
- packet_len = stream_len;
- status = get_packet_size(&buf[i], &packet_len);
- switch (status) {
- case PACKET_HEADER_OK:
- /* We know how much data we need to wait for. */
- break;
- case PACKET_NEED_MORE_DATA:
- /* We did not receive the full header. */
- packet_len = 0;
- break;
- case PACKET_INVALID_HEADER:
- default:
- /*
- * We had enough data, but here was an error in
- * parsing the header. Restart parsing from the
- * next byte.
- */
- packet_len = 0;
- i++;
- break;
- }
- }
-
- if ((stream_len >= packet_len) && (packet_len != 0)) {
- /* We have at least a packet's worth of data. */
- if (is_valid(&buf[i])) {
- sr_spew("Found valid %d-byte packet after "
- "%" PRIu64 "ms.", packet_len, time);
- *buflen = ibuf;
- return SR_OK;
- } else {
- sr_spew("Got %d bytes, but not a valid "
- "packet.", packet_len);
-
- }
-
- /* Not a valid packet. Continue searching. */
- i++;
- packet_len = 0;
- }
-
- if (time >= (int64_t)timeout_ms) {
- /* Timeout */
- sr_dbg("Detection timed out after %" PRIi64 "ms.", time);
- break;
- }
- g_usleep(byte_delay_us);
- }
-
- *buflen = ibuf;
- sr_err("Didn't find a valid packet (read %zu bytes).", ibuf);
-
- return SR_ERR;
-}
+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@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
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef LIBSIGROK_HARDWARE_BRYMEN_DMM_PROTOCOL_H
-#define LIBSIGROK_HARDWARE_BRYMEN_DMM_PROTOCOL_H
-
-#include <stdint.h>
-#include <string.h>
-#include <stdlib.h>
-#include <math.h>
-#include <glib.h>
-#include <libsigrok/libsigrok.h>
-#include "libsigrok-internal.h"
-
-#define LOG_PREFIX "brymen-dmm"
-
-#define DMM_BUFSIZE 256
-
-enum packet_len_status {
- PACKET_HEADER_OK,
- PACKET_NEED_MORE_DATA,
- PACKET_INVALID_HEADER,
-};
-
-struct dev_context {
- struct sr_sw_limits sw_limits;
- uint8_t buf[DMM_BUFSIZE];
- int bufoffset;
- int buflen;
- int next_packet_len;
-};
-
-/**
- * Callback that assesses the size and status of the incoming packet.
- *
- * @return PACKET_HEADER_OK - This is a proper packet header.
- * PACKET_NEED_MORE_DATA The buffer does not contain the entire header.
- * PACKET_INVALID_HEADER Not a valid start of packet.
- */
-typedef int (*packet_length_t)(const uint8_t *buf, int *len);
-
-SR_PRIV int brymen_dmm_receive_data(int fd, int revents, void *cb_data);
-SR_PRIV int brymen_packet_request(struct sr_serial_dev_inst *serial);
-
-SR_PRIV int brymen_packet_length(const uint8_t *buf, int *len);
-SR_PRIV gboolean brymen_packet_is_valid(const uint8_t *buf);
-
-SR_PRIV int brymen_parse(const uint8_t *buf, float *floatval,
- struct sr_datafeed_analog *analog, void *info);
-
-SR_PRIV int brymen_stream_detect(struct sr_serial_dev_inst *serial,
- uint8_t *buf, size_t *buflen,
- packet_length_t get_packet_size,
- packet_valid_callback is_valid,
- uint64_t timeout_ms, int baudrate);
-
-#endif
projects / libsigrok.git / commitdiff