+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
- *
- * 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 <string.h>
-#include <math.h>
-#include "protocol.h"
-
-#define USB_TIMEOUT 500
-
-static char char_map[128] = {
- [0x20] = '-',
- [0x5F] = '0',
- [0x50] = '1',
- [0x6D] = '2',
- [0x7C] = '3',
- [0x72] = '4',
- [0x3E] = '5',
- [0x3F] = '6',
- [0x54] = '7',
- [0x7F] = '8',
- [0x7E] = '9',
- [0x0F] = 'C',
- [0x27] = 'F',
- [0x0B] = 'L',
- [0x79] = 'd',
- [0x10] = 'i',
- [0x39] = 'o',
-};
-
-static int brymen_bm86x_parse_digits(const unsigned char *buf, int length,
- char *str, float *floatval,
- char *temp_unit, int flag)
-{
- char c, *p = str;
- int i, ret;
-
- if (buf[0] & flag)
- *p++ = '-';
- for (i = 0; i < length; i++) {
- if (i && i < 5 && buf[i+1] & 0x01)
- *p++ = '.';
- c = char_map[buf[i+1] >> 1];
- if (i == 5 && (c == 'C' || c == 'F'))
- *temp_unit = c;
- else if (c)
- *p++ = c;
- }
- *p = 0;
-
- if ((ret = sr_atof_ascii(str, floatval))) {
- sr_dbg("invalid float string: '%s'", str);
- return ret;
- }
-
- return SR_OK;
-}
-
-static void brymen_bm86x_parse(unsigned char *buf, float *floatval,
- struct sr_datafeed_analog *analog)
-{
- char str[16], temp_unit;
- int ret1, ret2, over_limit;
-
- ret1 = brymen_bm86x_parse_digits(buf+2, 6, str, &floatval[0],
- &temp_unit, 0x80);
- over_limit = strstr(str, "0L") || strstr(str, "0.L");
- ret2 = brymen_bm86x_parse_digits(buf+9, 4, str, &floatval[1],
- &temp_unit, 0x10);
-
- /* main display */
- if (ret1 == SR_OK || over_limit) {
- /* SI unit */
- if (buf[8] & 0x01) {
- analog[0].mq = SR_MQ_VOLTAGE;
- analog[0].unit = SR_UNIT_VOLT;
- if (!strcmp(str, "diod"))
- analog[0].mqflags |= SR_MQFLAG_DIODE;
- } else if (buf[14] & 0x80) {
- analog[0].mq = SR_MQ_CURRENT;
- analog[0].unit = SR_UNIT_AMPERE;
- } else if (buf[14] & 0x20) {
- analog[0].mq = SR_MQ_CAPACITANCE;
- analog[0].unit = SR_UNIT_FARAD;
- } else if (buf[14] & 0x10) {
- analog[0].mq = SR_MQ_CONDUCTANCE;
- analog[0].unit = SR_UNIT_SIEMENS;
- } else if (buf[15] & 0x01) {
- analog[0].mq = SR_MQ_FREQUENCY;
- analog[0].unit = SR_UNIT_HERTZ;
- } else if (buf[10] & 0x01) {
- analog[0].mq = SR_MQ_CONTINUITY;
- analog[0].unit = SR_UNIT_OHM;
- } else if (buf[15] & 0x10) {
- analog[0].mq = SR_MQ_RESISTANCE;
- analog[0].unit = SR_UNIT_OHM;
- } else if (buf[15] & 0x02) {
- analog[0].mq = SR_MQ_POWER;
- analog[0].unit = SR_UNIT_DECIBEL_MW;
- } else if (buf[15] & 0x80) {
- analog[0].mq = SR_MQ_DUTY_CYCLE;
- analog[0].unit = SR_UNIT_PERCENTAGE;
- } else if (buf[ 2] & 0x0A) {
- analog[0].mq = SR_MQ_TEMPERATURE;
- if (temp_unit == 'F')
- analog[0].unit = SR_UNIT_FAHRENHEIT;
- else
- analog[0].unit = SR_UNIT_CELSIUS;
- }
-
- /* when MIN MAX and AVG are displayed at the same time, remove them */
- if ((buf[1] & 0xE0) == 0xE0)
- buf[1] &= ~0xE0;
-
- /* AC/DC/Auto flags */
- if (buf[1] & 0x10) analog[0].mqflags |= SR_MQFLAG_DC;
- if (buf[2] & 0x01) analog[0].mqflags |= SR_MQFLAG_AC;
- if (buf[1] & 0x01) analog[0].mqflags |= SR_MQFLAG_AUTORANGE;
- if (buf[1] & 0x08) analog[0].mqflags |= SR_MQFLAG_HOLD;
- if (buf[1] & 0x20) analog[0].mqflags |= SR_MQFLAG_MAX;
- if (buf[1] & 0x40) analog[0].mqflags |= SR_MQFLAG_MIN;
- if (buf[1] & 0x80) analog[0].mqflags |= SR_MQFLAG_AVG;
- if (buf[3] & 0x01) analog[0].mqflags |= SR_MQFLAG_RELATIVE;
-
- /* when dBm is displayed, remove the m suffix so that it is
- not considered as the 10e-3 SI prefix */
- if (buf[15] & 0x02)
- buf[15] &= ~0x04;
-
- /* SI prefix */
- if (buf[14] & 0x40) floatval[0] *= 1e-9; /* n */
- if (buf[15] & 0x08) floatval[0] *= 1e-6; /* µ */
- if (buf[15] & 0x04) floatval[0] *= 1e-3; /* m */
- if (buf[15] & 0x40) floatval[0] *= 1e3; /* k */
- if (buf[15] & 0x20) floatval[0] *= 1e6; /* M */
-
- if (over_limit) floatval[0] = INFINITY;
- }
-
- /* secondary display */
- if (ret2 == SR_OK) {
- /* SI unit */
- if (buf[14] & 0x08) {
- analog[1].mq = SR_MQ_VOLTAGE;
- analog[1].unit = SR_UNIT_VOLT;
- } else if (buf[9] & 0x04) {
- analog[1].mq = SR_MQ_CURRENT;
- analog[1].unit = SR_UNIT_AMPERE;
- } else if (buf[14] & 0x04) {
- analog[1].mq = SR_MQ_FREQUENCY;
- analog[1].unit = SR_UNIT_HERTZ;
- } else if (buf[9] & 0x40) {
- analog[1].mq = SR_MQ_TEMPERATURE;
- if (temp_unit == 'F')
- analog[1].unit = SR_UNIT_FAHRENHEIT;
- else
- analog[1].unit = SR_UNIT_CELSIUS;
- }
-
- /* AC flag */
- if (buf[9] & 0x20) analog[1].mqflags |= SR_MQFLAG_AC;
-
- /* SI prefix */
- if (buf[ 9] & 0x01) floatval[1] *= 1e-6; /* µ */
- if (buf[ 9] & 0x02) floatval[1] *= 1e-3; /* m */
- if (buf[14] & 0x02) floatval[1] *= 1e3; /* k */
- if (buf[14] & 0x01) floatval[1] *= 1e6; /* M */
- }
-
- if (buf[9] & 0x80)
- sr_spew("Battery is low.");
-}
-
-static void brymen_bm86x_handle_packet(const struct sr_dev_inst *sdi,
- unsigned char *buf)
-{
- struct dev_context *devc;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog[2];
- float floatval[2];
-
- devc = sdi->priv;
-
- analog[0].mq = -1;
- analog[0].mqflags = 0;
-
- analog[1].mq = -1;
- analog[1].mqflags = 0;
-
- brymen_bm86x_parse(buf, floatval, analog);
-
- if (analog[0].mq != -1) {
- /* Got a measurement. */
- analog[0].num_samples = 1;
- analog[0].data = &floatval[0];
- analog[0].channels = g_slist_append(NULL, sdi->channels->data);
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog[0];
- sr_session_send(sdi, &packet);
- g_slist_free(analog[0].channels);
- }
-
- if (analog[1].mq != -1) {
- /* Got a measurement. */
- analog[1].num_samples = 1;
- analog[1].data = &floatval[1];
- analog[1].channels = g_slist_append(NULL, sdi->channels->next->data);
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog[1];
- sr_session_send(sdi, &packet);
- g_slist_free(analog[1].channels);
- }
-
- if (analog[0].mq != -1 || analog[1].mq != -1)
- devc->num_samples++;
-}
-
-static int brymen_bm86x_send_command(const struct sr_dev_inst *sdi)
-{
- struct sr_usb_dev_inst *usb;
- unsigned char buf[] = { 0x00, 0x86, 0x66 };
- int ret;
-
- usb = sdi->conn;
-
- sr_dbg("Sending HID set report.");
- ret = libusb_control_transfer(usb->devhdl,
- LIBUSB_REQUEST_TYPE_CLASS |
- LIBUSB_RECIPIENT_INTERFACE |
- LIBUSB_ENDPOINT_OUT,
- 9, /* bRequest: HID set_report */
- 0x300, /* wValue: HID feature, report num 0 */
- 0, /* wIndex: interface 0 */
- buf, sizeof(buf), USB_TIMEOUT);
-
- if (ret < 0) {
- sr_err("HID feature report error: %s.", libusb_error_name(ret));
- return SR_ERR;
- }
-
- if (ret != sizeof(buf)) {
- sr_err("Short packet: sent %d/%ld bytes.", ret, sizeof(buf));
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-static int brymen_bm86x_read_interrupt(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- struct sr_usb_dev_inst *usb;
- unsigned char buf[24];
- int ret, transferred;
-
- devc = sdi->priv;
- usb = sdi->conn;
-
- sr_dbg("Reading HID interrupt report.");
- /* Get data from EP1 using an interrupt transfer. */
- ret = libusb_interrupt_transfer(usb->devhdl,
- LIBUSB_ENDPOINT_IN | 1, /* EP1, IN */
- buf, sizeof(buf),
- &transferred, USB_TIMEOUT);
-
- if (ret == LIBUSB_ERROR_TIMEOUT) {
- if (++devc->interrupt_pending > 3)
- devc->interrupt_pending = 0;
- return SR_OK;
- }
-
- if (ret < 0) {
- sr_err("USB receive error: %s.", libusb_error_name(ret));
- return SR_ERR;
- }
-
- if (transferred != sizeof(buf)) {
- sr_err("Short packet: received %d/%d bytes.", transferred, sizeof(buf));
- return SR_ERR;
- }
-
- devc->interrupt_pending = 0;
- brymen_bm86x_handle_packet(sdi, buf);
-
- return SR_OK;
-}
-
-SR_PRIV int brymen_bm86x_receive_data(int fd, int revents, void *cb_data)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- int64_t time;
-
- (void)fd;
- (void)revents;
-
- if (!(sdi = cb_data))
- return TRUE;
-
- if (!(devc = sdi->priv))
- return TRUE;
-
- if (!devc->interrupt_pending) {
- if (brymen_bm86x_send_command(sdi))
- return FALSE;
- devc->interrupt_pending = 1;
- }
-
- if (brymen_bm86x_read_interrupt(sdi))
- return FALSE;
-
- if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
- sr_info("Requested number of samples reached, stopping.");
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
- return TRUE;
- }
-
- if (devc->limit_msec) {
- time = (g_get_monotonic_time() - devc->start_time) / 1000;
- if (time > (int64_t)devc->limit_msec) {
- sr_info("Requested time limit reached, stopping.");
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
- return TRUE;
- }
- }
-
- return TRUE;
-}
projects / libsigrok.git / blobdiff