+#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].probes = g_slist_append(NULL, sdi->probes->data);
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog[0];
+ sr_session_send(devc->session_cb_data, &packet);
+ g_slist_free(analog[0].probes);
+ }
+
+ if (analog[1].mq != -1) {
+ /* Got a measurement. */
+ analog[1].num_samples = 1;
+ analog[1].data = &floatval[1];
+ analog[1].probes = g_slist_append(NULL, sdi->probes->next->data);
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog[1];
+ sr_session_send(devc->session_cb_data, &packet);
+ g_slist_free(analog[1].probes);
+ }
+
+ 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;
+}
+
projects / libsigrok.git / commitdiff