From: Frank Stettner Date: Mon, 24 May 2021 11:02:00 +0000 (+0200) Subject: hp-3478a: Fix switching from 4-wire to 2-wire measurement. X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=569165c0e44323ce8a4baf1da4d540e8976e9d33;p=libsigrok.git hp-3478a: Fix switching from 4-wire to 2-wire measurement. The measured quantity flags for the measurement mode can only contain one flag at maximum. Therefore the quantity flags handling can be simplified, which also fixes a bug when switching from 4-wire resistance measurement to 2-wire mode. --- diff --git a/src/hardware/hp-3478a/api.c b/src/hardware/hp-3478a/api.c index 1fd3ff20..0c461bb1 100644 --- a/src/hardware/hp-3478a/api.c +++ b/src/hardware/hp-3478a/api.c @@ -1,7 +1,7 @@ /* * This file is part of the libsigrok project. * - * Copyright (C) 2017 Frank Stettner + * Copyright (C) 2017-2021 Frank Stettner * * 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 @@ -203,7 +203,7 @@ static int config_get(uint32_t key, GVariant **data, if (ret != SR_OK) return ret; arr[0] = g_variant_new_uint32(devc->measurement_mq); - arr[1] = g_variant_new_uint64(devc->measurement_mq_flags); + arr[1] = g_variant_new_uint64(devc->measurement_mq_flag); *data = g_variant_new_tuple(arr, 2); break; case SR_CONF_RANGE: @@ -213,7 +213,7 @@ static int config_get(uint32_t key, GVariant **data, range_str = "Auto"; for (i = 0; i < ARRAY_SIZE(rangeopts); i++) { if (rangeopts[i].mq == devc->measurement_mq && - rangeopts[i].mqflag == devc->measurement_mq_flags && + rangeopts[i].mqflag == devc->measurement_mq_flag && rangeopts[i].range_exp == devc->range_exp) { range_str = rangeopts[i].range_str; break; @@ -265,7 +265,7 @@ static int config_set(uint32_t key, GVariant *data, range_str = g_variant_get_string(data, NULL); for (i = 0; i < ARRAY_SIZE(rangeopts); i++) { if (rangeopts[i].mq == devc->measurement_mq && - rangeopts[i].mqflag == devc->measurement_mq_flags && + rangeopts[i].mqflag == devc->measurement_mq_flag && g_strcmp0(rangeopts[i].range_str, range_str) == 0) { return hp_3478a_set_range(sdi, rangeopts[i].range_exp); } @@ -321,7 +321,7 @@ static int config_list(uint32_t key, GVariant **data, g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY); for (i = 0; i < ARRAY_SIZE(rangeopts); i++) { if (rangeopts[i].mq == devc->measurement_mq && - rangeopts[i].mqflag == devc->measurement_mq_flags) { + rangeopts[i].mqflag == devc->measurement_mq_flag) { g_variant_builder_add(&gvb, "s", rangeopts[i].range_str); } } diff --git a/src/hardware/hp-3478a/protocol.c b/src/hardware/hp-3478a/protocol.c index 7842f2f4..2e9130b0 100644 --- a/src/hardware/hp-3478a/protocol.c +++ b/src/hardware/hp-3478a/protocol.c @@ -1,7 +1,7 @@ /* * This file is part of the libsigrok project. * - * Copyright (C) 2017-2018 Frank Stettner + * Copyright (C) 2017-2021 Frank Stettner * * 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 @@ -69,9 +69,8 @@ SR_PRIV int hp_3478a_set_mq(const struct sr_dev_inst *sdi, enum sr_mq mq, struct sr_scpi_dev_inst *scpi = sdi->conn; struct dev_context *devc = sdi->priv; - /* No need to send command if we're not changing measurement type. */ - if (devc->measurement_mq == mq && - ((devc->measurement_mq_flags & mq_flags) == mq_flags)) + /* No need to send a command if we're not changing the measurement type. */ + if (devc->measurement_mq == mq && devc->measurement_mq_flag == mq_flags) return SR_OK; for (i = 0; i < ARRAY_SIZE(sr_mq_to_cmd_map); i++) { @@ -227,17 +226,17 @@ static int parse_function_byte(struct dev_context *devc, uint8_t function_byte) return SR_ERR_DATA; /* Function + Range */ - devc->measurement_mq_flags = 0; + devc->measurement_mq_flag = 0; devc->acquisition_mq_flags = 0; if ((function_byte & SB1_FUNCTION_BLOCK) == FUNCTION_VDC) { devc->measurement_mq = SR_MQ_VOLTAGE; - devc->measurement_mq_flags |= SR_MQFLAG_DC; + devc->measurement_mq_flag = SR_MQFLAG_DC; devc->acquisition_mq_flags |= SR_MQFLAG_DC; devc->measurement_unit = SR_UNIT_VOLT; parse_range_vdc(devc, function_byte); } else if ((function_byte & SB1_FUNCTION_BLOCK) == FUNCTION_VAC) { devc->measurement_mq = SR_MQ_VOLTAGE; - devc->measurement_mq_flags |= SR_MQFLAG_AC; + devc->measurement_mq_flag = SR_MQFLAG_AC; devc->acquisition_mq_flags |= SR_MQFLAG_AC | SR_MQFLAG_RMS; devc->measurement_unit = SR_UNIT_VOLT; parse_range_vac(devc, function_byte); @@ -247,19 +246,19 @@ static int parse_function_byte(struct dev_context *devc, uint8_t function_byte) parse_range_ohm(devc, function_byte); } else if ((function_byte & SB1_FUNCTION_BLOCK) == FUNCTION_4WR) { devc->measurement_mq = SR_MQ_RESISTANCE; - devc->measurement_mq_flags |= SR_MQFLAG_FOUR_WIRE; + devc->measurement_mq_flag = SR_MQFLAG_FOUR_WIRE; devc->acquisition_mq_flags |= SR_MQFLAG_FOUR_WIRE; devc->measurement_unit = SR_UNIT_OHM; parse_range_ohm(devc, function_byte); } else if ((function_byte & SB1_FUNCTION_BLOCK) == FUNCTION_ADC) { devc->measurement_mq = SR_MQ_CURRENT; - devc->measurement_mq_flags |= SR_MQFLAG_DC; + devc->measurement_mq_flag = SR_MQFLAG_DC; devc->acquisition_mq_flags |= SR_MQFLAG_DC; devc->measurement_unit = SR_UNIT_AMPERE; parse_range_a(devc, function_byte); } else if ((function_byte & SB1_FUNCTION_BLOCK) == FUNCTION_AAC) { devc->measurement_mq = SR_MQ_CURRENT; - devc->measurement_mq_flags |= SR_MQFLAG_AC; + devc->measurement_mq_flag = SR_MQFLAG_AC; devc->acquisition_mq_flags |= SR_MQFLAG_AC | SR_MQFLAG_RMS; devc->measurement_unit = SR_UNIT_AMPERE; parse_range_a(devc, function_byte); diff --git a/src/hardware/hp-3478a/protocol.h b/src/hardware/hp-3478a/protocol.h index 169166c9..a6318f92 100644 --- a/src/hardware/hp-3478a/protocol.h +++ b/src/hardware/hp-3478a/protocol.h @@ -1,7 +1,7 @@ /* * This file is part of the libsigrok project. * - * Copyright (C) 2017 Frank Stettner + * Copyright (C) 2017-2021 Frank Stettner * * 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 @@ -31,7 +31,7 @@ #define SB1_RANGE_BLOCK 0b00011100 #define SB1_DIGITS_BLOCK 0b00000011 -/* Status Byte 1 (Function) */ +/** Status Byte 1 (Function) */ enum sb1_function { FUNCTION_VDC = 0b00100000, FUNCTION_VAC = 0b01000000, @@ -42,7 +42,7 @@ enum sb1_function { FUNCTION_EXR = 0b11100000, }; -/* Status Byte 1 (Range V DC) */ +/** Status Byte 1 (Range V DC) */ enum sb1_range_vdc { RANGE_VDC_30MV = 0b00000100, RANGE_VDC_300MV = 0b00001000, @@ -51,7 +51,7 @@ enum sb1_range_vdc { RANGE_VDC_300V = 0b00010100, }; -/* Status Byte 1 (Range V AC) */ +/** Status Byte 1 (Range V AC) */ enum sb1_range_vac { RANGE_VAC_300MV = 0b00000100, RANGE_VAC_3V = 0b00001000, @@ -59,13 +59,13 @@ enum sb1_range_vac { RANGE_VAC_300V = 0b00010000, }; -/* Status Byte 1 (Range A) */ +/** Status Byte 1 (Range A) */ enum sb1_range_a { RANGE_A_300MA = 0b00000100, RANGE_A_3A = 0b00001000, }; -/* Status Byte 1 (Range Ohm) */ +/** Status Byte 1 (Range Ohm) */ enum sb1_range_ohm { RANGE_OHM_30R = 0b00000100, RANGE_OHM_300R = 0b00001000, @@ -76,14 +76,14 @@ enum sb1_range_ohm { RANGE_OHM_30MR = 0b00011100, }; -/* Status Byte 1 (Digits) */ +/** Status Byte 1 (Digits) */ enum sb1_digits { DIGITS_5_5 = 0b00000001, DIGITS_4_5 = 0b00000010, DIGITS_3_5 = 0b00000011, }; -/* Status Byte 2 */ +/** Status Byte 2 */ enum sb2_status { STATUS_INT_TRIGGER = (1 << 0), STATUS_AUTO_RANGE = (1 << 1), @@ -94,7 +94,7 @@ enum sb2_status { STATUS_EXT_TRIGGER = (1 << 6), }; -/* Status Byte 3 (Serial Poll Mask) */ +/** Status Byte 3 (Serial Poll Mask) */ enum sb3_srq { SRQ_BUS_AVAIL = (1 << 0), SRQ_SYNTAX_ERR = (1 << 2), @@ -104,7 +104,7 @@ enum sb3_srq { SRQ_POWER_ON = (1 << 7), }; -/* Status Byte 4 (Error) */ +/** Status Byte 4 (Error) */ enum sb4_error { ERROR_SELF_TEST = (1 << 0), ERROR_RAM_SELF_TEST = (1 << 1), @@ -114,20 +114,20 @@ enum sb4_error { ERROR_AD_LINK = (1 << 5), }; -/* Channel connector (front terminals or rear terminals. */ +/** Channel connector (front terminals or rear terminals. */ enum terminal_connector { TERMINAL_FRONT, TERMINAL_REAR, }; -/* Possible triggers */ +/** Available triggers */ enum trigger_state { TRIGGER_UNDEFINED, TRIGGER_EXTERNAL, TRIGGER_INTERNAL, }; -/* Possible line frequencies */ +/** Available line frequencies */ enum line_freq { LINE_50HZ, LINE_60HZ, @@ -138,9 +138,15 @@ struct dev_context { double measurement; enum sr_mq measurement_mq; - /** The measurement mq flags only contain flags for AC, DC and 4-wire. */ - enum sr_mqflag measurement_mq_flags; - /** The acquisition mq flags also contain flags for autoranging and RMS. */ + /** + * The measurement mq flag can contain none or one of the + * following flags: AC, DC, or 4-wire. + */ + enum sr_mqflag measurement_mq_flag; + /** + * The acquisition mq flags can contain multiple flags, + * for example autoranging, RMS, etc. + */ enum sr_mqflag acquisition_mq_flags; enum sr_unit measurement_unit; int range_exp;