* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <math.h>
+#include <string.h>
#include "protocol.h"
+/** Set or clear flags in devc->mqflags. */
+static void setmqf(struct dev_context *devc, uint64_t flags, gboolean set)
+{
+ if (set)
+ devc->mqflags |= flags;
+ else
+ devc->mqflags &= ~flags;
+}
+
+/** Decode current type and measured value, Metrahit 12-16. */
+static void decode_ctmv_16(uint8_t ctmv, struct dev_context *devc)
+{
+ devc->mq = 0;
+ devc->unit = 0;
+ devc->mqflags = 0;
+
+ switch (ctmv) {
+ case 0x00: /* 0000 - */
+ break;
+ case 0x01: /* 0001 mV DC */
+ devc->scale1000 = -1; /* Fall through */
+ case 0x02: /* 0010 V DC */
+ case 0x03: /* 0011 V AC+DC */
+ case 0x04: /* 0100 V AC */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_VOLT;
+ if (ctmv <= 0x03)
+ devc->mqflags |= SR_MQFLAG_DC;
+ if (ctmv >= 0x03) {
+ devc->mqflags |= SR_MQFLAG_AC;
+ if (devc->model >= METRAHIT_16S)
+ devc->mqflags |= SR_MQFLAG_RMS;
+ }
+ break;
+ case 0x05: /* 0101 Hz (15S/16S only) */
+ case 0x06: /* 0110 kHz (15S/16S only) */
+ devc->mq = SR_MQ_FREQUENCY;
+ devc->unit = SR_UNIT_HERTZ;
+ if (ctmv == 0x06)
+ devc->scale1000 = 1;
+ break;
+ case 0x07: /* 0111 % (15S/16S only) */
+ devc->mq = SR_MQ_DUTY_CYCLE;
+ devc->unit = SR_UNIT_PERCENTAGE;
+ break;
+ case 0x08: /* 1000 Diode */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_VOLT;
+ devc->mqflags |= SR_MQFLAG_DIODE;
+ break;
+ case 0x09: /* 1001 Ohm, °C */
+ case 0x0a: /* 1010 kOhm */
+ case 0x0b: /* 1011 MOhm */
+ devc->mq = SR_MQ_RESISTANCE; /* Changed to temp. later if req.*/
+ devc->unit = SR_UNIT_OHM;
+ devc->scale1000 = ctmv - 0x09;
+ break;
+ case 0x0c: /* 1100 nF (15S/16S only) */
+ case 0x0d: /* 1101 µF (15S/16S only) */
+ devc->mq = SR_MQ_CAPACITANCE;
+ devc->unit = SR_UNIT_FARAD;
+ if (ctmv == 0x0c)
+ devc->scale1000 = -3;
+ else
+ devc->scale1000 = -2;
+ break;
+ case 0x0e: /* mA, µA */
+ devc->scale1000 = -1; /* Fall through. */
+ case 0x0f: /* A */
+ devc->mq = SR_MQ_CURRENT;
+ devc->unit = SR_UNIT_AMPERE;
+ if (devc->model == METRAHIT_16S)
+ devc->mqflags |= SR_MQFLAG_RMS;
+ /* 16I A only with clamp, RMS questionable. */
+ break;
+ }
+}
+
+/**
+ * Decode range/sign/acdc byte special chars (Metrahit 12-16).
+ *
+ * @param[in] rs Range and sign byte.
+ */
+static void decode_rs_16(uint8_t rs, struct dev_context *devc)
+{
+ sr_spew("decode_rs_16(%d) scale = %f", rs, devc->scale);
+
+ if (rs & 0x04) /* Sign */
+ devc->scale *= -1.0;
+
+ if (devc->mq == SR_MQ_CURRENT) {
+ if (rs & 0x08) /* Current is AC */
+ devc->mqflags |= SR_MQFLAG_AC;
+ else
+ devc->mqflags |= SR_MQFLAG_DC;
+ }
+
+ switch (rs & 0x03) {
+ case 0:
+ if (devc->mq == SR_MQ_VOLTAGE) /* V */
+ devc->scale *= 0.1;
+ else if (devc->mq == SR_MQ_CURRENT) /* 000.0 µA */
+ devc->scale *= 0.0000001; /* Untested! */
+ else if (devc->mq == SR_MQ_RESISTANCE) {
+ if (devc->buflen >= 10) {
+ /* °C with 10 byte msg type, otherwise GOhm. */
+ devc->mq = SR_MQ_TEMPERATURE;
+ devc->unit = SR_UNIT_CELSIUS;
+ devc->scale *= 0.01;
+ } else if (devc->scale1000 == 2) {
+ /* 16I Iso 500/1000V 3 GOhm */
+ devc->scale *= 0.1;
+ }
+ }
+ break;
+ case 1:
+ devc->scale *= 0.0001;
+ break;
+ case 2:
+ devc->scale *= 0.001;
+ break;
+ case 3:
+ devc->scale *= 0.01;
+ break;
+ }
+}
+
+/**
+ * Decode special chars, Metrahit 12-16.
+ *
+ * @param[in] spc Special characters 1 and 2 (s1 | (s2 << 4)).
+ */
+static void decode_spc_16(uint8_t spc, struct dev_context *devc)
+{
+ /* xxxx1xxx ON */
+ /* TODO: What does that mean? Power on? The 16I sets this. */
+ /* xxxxx1xx BEEP */
+ /* xxxxxx1x Low battery */
+ /* xxxxxxx1 FUSE */
+ /* 1xxxxxxx MIN */
+ setmqf(devc, SR_MQFLAG_MIN, spc & 0x80);
+
+ /* x1xxxxxx MAN */
+ setmqf(devc, SR_MQFLAG_AUTORANGE, !(spc & 0x40));
+
+ /* xx1xxxxx DATA */
+ setmqf(devc, SR_MQFLAG_HOLD, spc & 0x20);
+
+ /* xxx1xxxx MAX */
+ setmqf(devc, SR_MQFLAG_MAX, spc & 0x10);
+}
+
+/** Decode current type and measured value, Metrahit 18. */
+static void decode_ctmv_18(uint8_t ctmv, struct dev_context *devc)
+{
+ devc->mq = 0;
+ devc->unit = 0;
+ devc->mqflags = 0;
+
+ switch (ctmv) {
+ case 0x00: /* 0000 - */
+ break;
+ case 0x01: /* 0001 V AC */
+ case 0x02: /* 0010 V AC+DC */
+ case 0x03: /* 0011 V DC */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_VOLT;
+ if (ctmv <= 0x02)
+ devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_RMS);
+ if (ctmv >= 0x02)
+ devc->mqflags |= SR_MQFLAG_DC;
+ break;
+ case 0x04: /* 0100 Ohm/Ohm with buzzer */
+ devc->mq = SR_MQ_RESISTANCE;
+ devc->unit = SR_UNIT_OHM;
+ break;
+ case 0x05: /* 0101 Diode/Diode with buzzer */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_VOLT;
+ devc->mqflags |= SR_MQFLAG_DIODE;
+ break;
+ case 0x06: /* 0110 °C */
+ devc->mq = SR_MQ_TEMPERATURE;
+ devc->unit = SR_UNIT_CELSIUS;
+ break;
+ case 0x07: /* 0111 F */
+ devc->mq = SR_MQ_CAPACITANCE;
+ devc->unit = SR_UNIT_FARAD;
+ break;
+ case 0x08: /* 1000 mA DC */
+ case 0x09: /* 1001 A DC */
+ case 0x0a: /* 1010 mA AC+DC */
+ case 0x0b: /* 1011 A AC+DC */
+ devc->mq = SR_MQ_CURRENT;
+ devc->unit = SR_UNIT_AMPERE;
+ devc->mqflags |= SR_MQFLAG_DC;
+ if (ctmv >= 0x0a)
+ devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_RMS);
+ if ((ctmv == 0x08) || (ctmv == 0x0a))
+ devc->scale1000 = -1;
+ break;
+ case 0x0c: /* 1100 Hz */
+ devc->mq = SR_MQ_FREQUENCY;
+ devc->unit = SR_UNIT_HERTZ;
+ break;
+ case 0x0d: /* 1101 dB */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_DECIBEL_VOLT;
+ devc->mqflags |= SR_MQFLAG_AC; /* dB available for AC only */
+ break;
+ case 0x0e: /* 1110 Events AC, Events AC+DC. Actually delivers just
+ * current voltage via IR, nothing more. */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_VOLT;
+ devc->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS;
+ break;
+ case 0x0f: /* 1111 Clock */
+ devc->mq = SR_MQ_TIME;
+ devc->unit = SR_UNIT_SECOND;
+ devc->mqflags |= SR_MQFLAG_DURATION;
+ break;
+ }
+}
+
+/**
+ * Decode range/sign/acdc byte special chars, Metrahit 18.
+ *
+ * @param[in] rs Rance/sign byte.
+ */
+static void decode_rs_18(uint8_t rs, struct dev_context *devc)
+{
+ int range;
+
+ /* Sign */
+ if (((devc->scale > 0) && (rs & 0x08)) ||
+ ((devc->scale < 0) && !(rs & 0x08)))
+ devc->scale *= -1.0;
+
+ /* Range */
+ range = rs & 0x07;
+ switch (devc->mq) {
+ case SR_MQ_VOLTAGE:
+ if (devc->unit == SR_UNIT_DECIBEL_VOLT) {
+ devc->scale *= pow(10.0, -2);
+ /*
+ * When entering relative mode, the device switches
+ * from 10 byte to 6 byte msg format. Unfortunately
+ * it switches back to 10 byte when the second value
+ * is measured, so that's not sufficient to
+ * identify relative mode.
+ */
+ }
+ else if (devc->vmains_29S)
+ devc->scale *= pow(10.0, range - 2);
+ else
+ devc->scale *= pow(10.0, range - 5);
+ break;
+ case SR_MQ_CURRENT:
+ if (devc->scale1000 == -1)
+ devc->scale *= pow(10.0, range - 5);
+ else
+ devc->scale *= pow(10.0, range - 4);
+ break;
+ case SR_MQ_RESISTANCE:
+ devc->scale *= pow(10.0, range - 2);
+ break;
+ case SR_MQ_FREQUENCY:
+ devc->scale *= pow(10.0, range - 3);
+ break;
+ case SR_MQ_TEMPERATURE:
+ devc->scale *= pow(10.0, range - 2);
+ break;
+ case SR_MQ_CAPACITANCE:
+ devc->scale *= pow(10.0, range - 14);
+ break;
+ /* TODO: 29S Mains measurements. */
+ }
+}
+
+/**
+ * Decode special chars, Metrahit 18.
+ *
+ * @param[in] spc Special characters 1 and 2 (s1 | (s2 << 4)).
+ */
+static void decode_spc_18(uint8_t spc, struct dev_context *devc)
+{
+ /* xxxx1xxx ZERO */
+ /* xxxxx1xx BEEP */
+ /* xxxxxx1x Low battery */
+ /* xxxxxxx1 Fuse */
+
+ if (devc->mq == SR_MQ_TIME) {
+ /* xxx1xxxx Clock running: 1; stop: 0 */
+ sr_spew("Clock running: %d", spc >> 4);
+ } else {
+ /* 1xxxxxxx MAN */
+ setmqf(devc, SR_MQFLAG_AUTORANGE, !(spc & 0x80));
+
+ /* x1xxxxxx MIN */
+ setmqf(devc, SR_MQFLAG_MIN, spc & 0x40);
+
+ /* xx1xxxxx MAX */
+ setmqf(devc, SR_MQFLAG_MAX, spc & 0x20);
+
+ /* xxx1xxxx DATA */
+ setmqf(devc, SR_MQFLAG_HOLD, spc & 0x10);
+ }
+}
+
+/**
+ * Decode current type and measured value, Metrahit 2x.
+ *
+ * @param[in] ctmv Current type and measured value (v1 | (v2 << 4)).
+ */
+static void decode_ctmv_2x(uint8_t ctmv, struct dev_context *devc)
+{
+ if ((ctmv > 0x1c) || (!devc)) {
+ sr_err("decode_ctmv_2x(%d): invalid param(s)!", ctmv);
+ return;
+ }
+
+ devc->mq = 0;
+ devc->unit = 0;
+ devc->mqflags = 0;
+
+ switch (ctmv) {
+ /* 00000 unused */
+ case 0x01: /* 00001 V DC */
+ case 0x02: /* 00010 V AC+DC */
+ case 0x03: /* 00011 V AC */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_VOLT;
+ if (ctmv <= 0x02)
+ devc->mqflags |= SR_MQFLAG_DC;
+ if (ctmv >= 0x02) {
+ devc->mqflags |= SR_MQFLAG_AC;
+ if (devc->model >= METRAHIT_24S)
+ devc->model |= SR_MQFLAG_RMS;
+ }
+ break;
+ case 0x04: /* 00100 mA DC */
+ case 0x05: /* 00101 mA AC+DC */
+ devc->scale1000 = -1;
+ case 0x06: /* 00110 A DC */
+ case 0x07: /* 00111 A AC+DC */
+ devc->mq = SR_MQ_CURRENT;
+ devc->unit = SR_UNIT_AMPERE;
+ devc->mqflags |= SR_MQFLAG_DC;
+ if ((ctmv == 0x05) || (ctmv == 0x07)) {
+ devc->mqflags |= SR_MQFLAG_AC;
+ if (devc->model >= METRAHIT_24S)
+ devc->mqflags |= SR_MQFLAG_RMS;
+ }
+ break;
+ case 0x08: /* 01000 Ohm */
+ devc->mq = SR_MQ_RESISTANCE;
+ devc->unit = SR_UNIT_OHM;
+ break;
+ case 0x09: /* 01001 F */
+ devc->mq = SR_MQ_CAPACITANCE;
+ devc->unit = SR_UNIT_FARAD;
+ devc->scale *= 0.1;
+ break;
+ case 0x0a: /* 01010 dB */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_DECIBEL_VOLT;
+ devc->mqflags |= SR_MQFLAG_AC;
+ break;
+ case 0x0b: /* 01011 Hz U ACDC */
+ case 0x0c: /* 01100 Hz U AC */
+ devc->mq = SR_MQ_FREQUENCY;
+ devc->unit = SR_UNIT_HERTZ;
+ devc->mqflags |= SR_MQFLAG_AC;
+ if (ctmv <= 0x0b)
+ devc->mqflags |= SR_MQFLAG_DC;
+ break;
+ case 0x0d: /* 01101 W on power, mA range (29S only) */
+ case 0x0e: /* 01110 W on power, A range (29S only) */
+ /* TODO: Differences between Send Mode and bidir protocol here */
+ devc->mq = SR_MQ_POWER;
+ devc->unit = SR_UNIT_WATT;
+ break;
+ case 0x0f: /* 01111 Diode */
+ case 0x10: /* 10000 Diode with buzzer (actually cont. with voltage) */
+ devc->unit = SR_UNIT_VOLT;
+ if (ctmv == 0x0f) {
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->mqflags |= SR_MQFLAG_DIODE;
+ devc->scale *= 0.1;
+ } else {
+ devc->mq = SR_MQ_CONTINUITY;
+ devc->scale *= 0.00001;
+ }
+ devc->unit = SR_UNIT_VOLT;
+ break;
+ case 0x11: /* 10001 Ohm with buzzer */
+ devc->mq = SR_MQ_CONTINUITY;
+ devc->unit = SR_UNIT_OHM;
+ devc->scale1000 = -1;
+ break;
+ case 0x12: /* 10010 Temperature */
+ devc->mq = SR_MQ_TEMPERATURE;
+ devc->unit = SR_UNIT_CELSIUS;
+ /* This can be Fahrenheit. That is detected by range=4 later. */
+ break;
+ /* 0x13 10011, 0x14 10100 unsed */
+ case 0x15: /* 10101 Press (29S only) */
+ /* TODO: What does that mean? Possibly phase shift?
+ Then we need a unit/flag for it. */
+ devc->mq = SR_MQ_GAIN;
+ devc->unit = SR_UNIT_PERCENTAGE;
+ break;
+ case 0x16: /* 10110 Pulse W (29S only) */
+ /* TODO: Own unit and flag for this! */
+ devc->mq = SR_MQ_POWER;
+ devc->unit = SR_UNIT_WATT;
+ break;
+ case 0x17: /* 10111 TRMS V on mains (29S only) */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_VOLT;
+ devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_RMS);
+ devc->vmains_29S = TRUE;
+ break;
+ case 0x18: /* 11000 Counter (zero crossings of a signal) */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_UNITLESS;
+ break;
+ case 0x19: /* 11001 Events U ACDC */
+ case 0x1a: /* 11010 Events U AC */
+ /* TODO: No unit or flags for this yet! */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_UNITLESS;
+ devc->mqflags |= SR_MQFLAG_AC;
+ if (ctmv <= 0x19)
+ devc->mqflags |= SR_MQFLAG_DC;
+ break;
+ case 0x1b: /* 11011 pulse on mains (29S only) */
+ /* TODO: No unit or flags for this yet! */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_UNITLESS;
+ devc->mqflags |= SR_MQFLAG_AC;
+ break;
+ case 0x1c: /* 11100 dropout on mains (29S only) */
+ /* TODO: No unit or flags for this yet! */
+ devc->mq = SR_MQ_VOLTAGE;
+ devc->unit = SR_UNIT_UNITLESS;
+ devc->mqflags |= SR_MQFLAG_AC;
+ break;
+ default:
+ sr_err("decode_ctmv_2x(%d, ...): Unknown ctmv!");
+ break;
+ }
+}
+
+/**
+ * Decode range/sign/acdc byte special chars, Metrahit 2x.
+ *
+ * @param[in] rs Rance/sign byte.
+ */
+static void decode_rs_2x(uint8_t rs, struct dev_context *devc)
+{
+ int range;
+
+ /* Sign */
+ if (((devc->scale > 0) && (rs & 0x08)) ||
+ ((devc->scale < 0) && !(rs & 0x08)))
+ devc->scale *= -1.0;
+
+ /* Range */
+ range = rs & 0x07;
+ switch (devc->mq) {
+ case SR_MQ_VOLTAGE:
+ if (devc->unit == SR_UNIT_DECIBEL_VOLT)
+ devc->scale *= pow(10.0, -3);
+ else if (devc->vmains_29S)
+ devc->scale *= pow(10.0, range - 2);
+ else if(devc->mqflags & SR_MQFLAG_AC)
+ devc->scale *= pow(10.0, range - 6);
+ else /* "Undocumented feature": Between AC and DC
+ scaling differs by 1. */
+ devc->scale *= pow(10.0, range - 5);
+ break;
+ case SR_MQ_CURRENT:
+ if (devc->scale1000 == -1)
+ devc->scale *= pow(10.0, range - 5);
+ else
+ devc->scale *= pow(10.0, range - 4);
+ break;
+ case SR_MQ_RESISTANCE:
+ devc->scale *= pow(10.0, range - 3);
+ break;
+ case SR_MQ_FREQUENCY:
+ devc->scale *= pow(10.0, range - 3);
+ break;
+ case SR_MQ_TEMPERATURE:
+ if (range == 4) /* Indicator for °F */
+ devc->unit = SR_UNIT_FAHRENHEIT;
+ devc->scale *= pow(10.0, - 2);
+ break;
+ case SR_MQ_CAPACITANCE:
+ devc->scale *= pow(10.0, range - 13);
+ break;
+ /* TODO: 29S Mains measurements. */
+ }
+}
+
+/**
+ * Decode special chars (Metrahit 2x).
+ *
+ * @param[in] spc Special characters 1 and 2 (s1 | (s2 << 4)).
+ */
+static void decode_spc_2x(uint8_t spc, struct dev_context *devc)
+{
+ /* xxxxxxx1 Fuse */
+
+ /* xxxxxx1x Low battery */
+
+ /* xxxxx1xx BEEP */
+
+ /* xxxx1xxx ZERO */
+
+ /* xxx1xxxx DATA */
+ setmqf(devc, SR_MQFLAG_HOLD, spc & 0x10);
+
+ /* x11xxxxx unused */
+ /* 1xxxxxxx MAN */
+ setmqf(devc, SR_MQFLAG_AUTORANGE, !(spc & 0x80));
+}
+
+/** Clean range and sign. */
+static void clean_rs_v(struct dev_context *devc)
+{
+ devc->value = 0.0;
+ devc->scale = 1.0;
+}
+
+/** Clean current type, measured variable, range and sign. */
+static void clean_ctmv_rs_v(struct dev_context *devc)
+{
+ devc->mq = 0;
+ devc->unit = 0;
+ devc->mqflags = 0;
+ devc->scale1000 = 0;
+ devc->vmains_29S = FALSE;
+ clean_rs_v(devc);
+}
+
+/** Send prepared value. */
+static void send_value(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_analog analog;
+ struct sr_datafeed_packet packet;
+
+ devc = sdi->priv;
+
+ memset(&analog, 0, sizeof(analog));
+ analog.probes = sdi->probes;
+ analog.num_samples = 1;
+ analog.mq = devc->mq;
+ analog.unit = devc->unit;
+ analog.mqflags = devc->mqflags;
+ analog.data = &devc->value;
+
+ memset(&packet, 0, sizeof(packet));
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(devc->cb_data, &packet);
+
+ devc->num_samples++;
+}
+
+/** Process 6-byte data message, Metrahit 1x/2x. */
+static void process_msg_dta_6(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ int cnt;
+ uint8_t dgt;
+
+ devc = sdi->priv;
+ clean_rs_v(devc);
+
+ /* Byte 0, range and sign */
+ if (devc->model <= METRAHIT_16X)
+ decode_rs_16(bc(devc->buf[0]), devc);
+ else if (devc->model < METRAHIT_2X)
+ decode_rs_18(bc(devc->buf[0]), devc);
+ else
+ decode_rs_2x(bc(devc->buf[0]), devc);
+
+ /* Bytes 1-5, digits (ls first). */
+ for (cnt = 0; cnt < 5; cnt++) {
+ dgt = bc(devc->buf[1 + cnt]);
+ if (dgt >= 10) {
+ /* 10 Overload; on model <= 16X also 11 possible. */
+ devc->value = NAN;
+ devc->scale = 1.0;
+ break;
+ }
+ devc->value += pow(10.0, cnt) * dgt;
+ }
+ sr_spew("process_msg_dta_6() value=%f scale=%f scalet=%d",
+ devc->value, devc->scale, devc->scale1000);
+ if (devc->value != NAN)
+ devc->value *= devc->scale * pow(1000.0, devc->scale1000);
+
+ /* Create and send packet. */
+ send_value(sdi);
+}
+
+/** Process 5-byte info message, Metrahit 1x/2x. */
+static void process_msg_inf_5(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ enum model model;
+
+ devc = sdi->priv;
+
+ clean_ctmv_rs_v(devc);
+
+ /* Process byte 0 */
+ model = gmc_decode_model_sm(bc(devc->buf[0]));
+ if (model != devc->model) {
+ sr_warn("Model mismatch in data: Detected %s, now %s",
+ gmc_model_str(devc->model), gmc_model_str(model));
+ }
+
+ /* Process bytes 1-4 */
+ if (devc->model <= METRAHIT_16X) {
+ decode_ctmv_16(bc(devc->buf[1]), devc);
+ decode_spc_16(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
+ decode_rs_16(bc(devc->buf[4]), devc);
+ } else if (devc->model <= METRAHIT_18S) {
+ decode_ctmv_18(bc(devc->buf[1]), devc);
+ decode_spc_18(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
+ decode_rs_18(bc(devc->buf[4]), devc);
+ } else { /* Must be Metrahit 2x */
+ decode_ctmv_2x(bc(devc->buf[1]), devc);
+ decode_spc_2x(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
+ decode_rs_2x(bc(devc->buf[4]), devc);
+ }
+}
+
+/** Process 10-byte info/data message, Metrahit 15+. */
+static void process_msg_inf_10(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ int cnt;
+ uint8_t dgt;
+
+ devc = sdi->priv;
+
+ process_msg_inf_5(sdi);
+
+ /* Now decode numbers */
+ for (cnt = 0; cnt < 5; cnt++) {
+ dgt = bc(devc->buf[5 + cnt]);
+ if (dgt >= 10) { /* Overload */
+ devc->value = NAN;
+ devc->scale = 1.0;
+ break;
+ }
+ devc->value += pow(10.0, cnt) * dgt;
+ }
+ sr_spew("process_msg_inf_10() value=%f scale=%f scalet=%d",
+ devc->value, devc->scale, devc->scale1000);
+
+ if (devc->value != NAN)
+ devc->value *= devc->scale * pow(1000.0, devc->scale1000);
+
+ /* Create and send packet. */
+ send_value(sdi);
+}
+
+/** Decode send interval (Metrahit 2x only). */
+static const char *decode_send_interval(uint8_t si)
+{
+ switch (si) {
+ case 0x00:
+ return "0.05";
+ case 0x01:
+ return "0.1";
+ case 0x02:
+ return "0.2";
+ case 0x03:
+ return "0.5";
+ case 0x04:
+ return "00:01";
+ case 0x05:
+ return "00:02";
+ case 0x06:
+ return "00:05";
+ case 0x07:
+ return "00:10";
+ case 0x08:
+ return "00:20";
+ case 0x09:
+ return "00:30";
+ case 0x0a:
+ return "01:00";
+ case 0x0b:
+ return "02:00";
+ case 0x0c:
+ return "05:00";
+ case 0x0d:
+ return "10:00";
+ case 0x0e:
+ return "----";
+ case 0x0f:
+ return "data";
+ default:
+ return "Unknown value";
+ }
+}
+
+/** Process 13-byte info/data message, Metrahit 2x. */
+static void process_msg_inf_13(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ enum model model;
+ int cnt;
+ uint8_t dgt;
+
+ devc = sdi->priv;
+
+ clean_ctmv_rs_v(devc);
+
+ /* Byte 0, model. */
+ model = gmc_decode_model_sm(bc(devc->buf[0]));
+ if (model != devc->model) {
+ sr_warn("Model mismatch in data: Detected %s, now %s",
+ gmc_model_str(devc->model), gmc_model_str(model));
+ }
+
+ /* Bytes 1-4, 11. */
+ decode_ctmv_2x(bc(devc->buf[1]) | (bc(devc->buf[11]) << 4), devc);
+ decode_spc_2x(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
+ decode_rs_2x(bc(devc->buf[4]), devc);
+
+ /* Bytes 5-10, digits (ls first). */
+ for (cnt = 0; cnt < 6; cnt++) {
+ dgt = bc(devc->buf[5 + cnt]);
+ if (dgt == 10) { /* Overload */
+ devc->value = NAN;
+ devc->scale = 1.0;
+ break;
+ }
+ devc->value += pow(10.0, cnt) * dgt;
+ }
+ sr_spew("process_msg_inf_13() value=%f scale=%f scale1000=%d mq=%d "
+ "unit=%d mqflags=0x%02llx", devc->value, devc->scale,
+ devc->scale1000, devc->mq, devc->unit, devc->mqflags);
+ if (devc->value != NAN)
+ devc->value *= devc->scale * pow(1000.0, devc->scale1000);
+
+ /* Byte 12, Send Interval */
+ sr_spew("Send interval: %s", decode_send_interval(bc(devc->buf[12])));
+
+ /* Create and send packet. */
+ send_value(sdi);
+}
+
SR_PRIV int gmc_mh_1x_2x_receive_data(int fd, int revents, void *cb_data)
{
- const struct sr_dev_inst *sdi;
+ struct sr_dev_inst *sdi;
struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ uint8_t buf, msgt;
+ int len;
+ gdouble elapsed_s;
(void)fd;
if (!(devc = sdi->priv))
return TRUE;
- if (revents == G_IO_IN) {
- /* TODO */
+ serial = sdi->conn;
+
+ if (revents == G_IO_IN) { /* Serial data arrived. */
+ while (GMC_BUFSIZE - devc->buflen - 1 > 0) {
+ len = serial_read(serial, devc->buf + devc->buflen, 1);
+ if (len < 1)
+ break;
+ buf = *(devc->buf + devc->buflen);
+ sr_spew("read 0x%02x/%d/%d", buf, buf, buf & MSGC_MASK);
+ devc->buflen += len;
+ if (!devc->settings_ok) {
+ /*
+ * If no device type/settings record processed
+ * yet, wait for one.
+ */
+ if ((devc->buf[0] & MSGID_MASK) != MSGID_INF) {
+ devc->buflen = 0;
+ continue;
+ }
+ devc->settings_ok = TRUE;
+ }
+
+ msgt = devc->buf[0] & MSGID_MASK;
+ switch (msgt) {
+ case MSGID_INF:
+ if (devc->buflen == 13) {
+ process_msg_inf_13(sdi);
+ devc->buflen = 0;
+ continue;
+ } else if ((devc->buflen == 10) &&
+ (devc->model <= METRAHIT_18S)) {
+ process_msg_inf_10(sdi);
+ devc->buflen = 0;
+ continue;
+ }
+ else if ((devc->buflen >= 5) &&
+ (devc->buf[devc->buflen - 1] &
+ MSGID_MASK) != MSGID_DATA) {
+ /*
+ * Char just received is beginning
+ * of next message.
+ */
+ process_msg_inf_5(sdi);
+ devc->buf[0] =
+ devc->buf[devc->buflen - 1];
+ devc->buflen = 1;
+ continue;
+ }
+ break;
+ case MSGID_DTA:
+ case MSGID_D10:
+ if (devc->buflen == 6) {
+ process_msg_dta_6(sdi);
+ devc->buflen = 0;
+ }
+ break;
+ case MSGID_DATA:
+ sr_err("Comm error, unexpected data byte!");
+ devc->buflen = 0;
+ break;
+ }
+ }
+ }
+
+ /* If number of samples or time limit reached, stop aquisition. */
+ if (devc->limit_samples && (devc->num_samples >= devc->limit_samples))
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+
+ if (devc->limit_msec) {
+ elapsed_s = g_timer_elapsed(devc->elapsed_msec, NULL);
+ if ((elapsed_s * 1000) >= devc->limit_msec)
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
}
return TRUE;
}
+
+/** Decode model in "send mode". */
+SR_PRIV int gmc_decode_model_sm(uint8_t mcode)
+{
+ if (mcode > 0xf) {
+ sr_err("decode_model(%d): Model code 0..15 expected!", mcode);
+ return METRAHIT_NONE;
+ }
+
+ switch(mcode) {
+ case 0x04: /* 0100b */
+ return METRAHIT_12S;
+ case 0x08: /* 1000b */
+ return METRAHIT_13S14A;
+ case 0x09: /* 1001b */
+ return METRAHIT_14S;
+ case 0x0A: /* 1010b */
+ return METRAHIT_15S;
+ case 0x0B: /* 1011b */
+ return METRAHIT_16S;
+ case 0x06: /* 0110b (undocumented by GMC!) */
+ return METRAHIT_16I;
+ case 0x0D: /* 1101b */
+ return METRAHIT_18S;
+ case 0x02: /* 0010b */
+ return METRAHIT_22SM;
+ case 0x03: /* 0011b */
+ return METRAHIT_23S;
+ case 0x0f: /* 1111b */
+ return METRAHIT_24S;
+ case 0x05: /* 0101b */
+ return METRAHIT_25SM;
+ case 0x01: /* 0001b */
+ return METRAHIT_26S;
+ case 0x0c: /* 1100b */
+ return METRAHIT_28S;
+ case 0x0e: /* 1110b */
+ return METRAHIT_29S;
+ default:
+ sr_err("Unknown model code %d!", mcode);
+ return METRAHIT_NONE;
+ }
+}
+
+/**
+ * Decode model in bidirectional mode.
+ *
+ * @param[in] mcode Model code.
+ *
+ * @return Model code.
+ */
+SR_PRIV int gmc_decode_model_bidi(uint8_t mcode)
+{
+ switch (mcode) {
+ case 2:
+ return METRAHIT_22SM;
+ case 3:
+ return METRAHIT_23S;
+ case 4:
+ return METRAHIT_24S;
+ case 5:
+ return METRAHIT_25SM;
+ case 1:
+ return METRAHIT_26S;
+ case 12:
+ return METRAHIT_28S;
+ case 14:
+ return METRAHIT_29S;
+ default:
+ sr_err("Unknown model code %d!", mcode);
+ return METRAHIT_NONE;
+ }
+}
+
+SR_PRIV const char *gmc_model_str(enum model mcode)
+{
+ switch (mcode) {
+ case METRAHIT_NONE:
+ return "-uninitialized model variable-";
+ case METRAHIT_12S:
+ return "METRAHit 12S";
+ case METRAHIT_13S14A:
+ return "METRAHit 13S/14A";
+ case METRAHIT_14S:
+ return "METRAHit 14S";
+ case METRAHIT_15S:
+ return "METRAHit 15S";
+ case METRAHIT_16S:
+ return "METRAHit 16S";
+ case METRAHIT_16I:
+ return "METRAHit 16I";
+ case METRAHIT_18S:
+ return "METRAHit 18S";
+ case METRAHIT_22SM:
+ return "METRAHit 22S/M";
+ case METRAHIT_23S:
+ return "METRAHit 23S";
+ case METRAHIT_24S:
+ return "METRAHit 24S";
+ case METRAHIT_25SM:
+ return "METRAHit 25S/M";
+ case METRAHIT_26S:
+ return "METRAHit 26S";
+ case METRAHIT_28S:
+ return "METRAHit 28S";
+ case METRAHIT_29S:
+ return "METRAHit 29S";
+ default:
+ return "Unknown model code";
+ }
+}
projects / libsigrok.git / blobdiff