mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-19 09:13:11 +00:00
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
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/*
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Unitemp - Universal temperature reader
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Copyright (C) 2022-2023 Victor Nikitchuk (https://github.com/quen0n)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "MAX31855.h"
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const SensorType MAX31855 = {
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.typename = "MAX31855",
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.altname = "MAX31855 (Thermocouple)",
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.interface = &SPI,
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.datatype = UT_TEMPERATURE,
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.pollingInterval = 500,
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.allocator = unitemp_MAX31855_alloc,
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.mem_releaser = unitemp_MAX31855_free,
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.initializer = unitemp_MAX31855_init,
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.deinitializer = unitemp_MAX31855_deinit,
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.updater = unitemp_MAX31855_update};
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bool unitemp_MAX31855_alloc(Sensor* sensor, char* args) {
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UNUSED(sensor);
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UNUSED(args);
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return true;
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}
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bool unitemp_MAX31855_free(Sensor* sensor) {
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UNUSED(sensor);
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return true;
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}
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bool unitemp_MAX31855_init(Sensor* sensor) {
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SPISensor* instance = sensor->instance;
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furi_hal_spi_bus_handle_init(instance->spi);
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UNUSED(instance);
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return true;
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}
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bool unitemp_MAX31855_deinit(Sensor* sensor) {
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UNUSED(sensor);
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return true;
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}
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UnitempStatus unitemp_MAX31855_update(Sensor* sensor) {
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SPISensor* instance = sensor->instance;
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furi_hal_spi_acquire(instance->spi);
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furi_hal_gpio_write(instance->CS_pin->pin, false);
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uint8_t buff[4] = {0};
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furi_hal_spi_bus_rx(instance->spi, buff, 4, 0xFF);
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furi_hal_spi_release(instance->spi);
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uint32_t raw = (buff[0] << 24) | (buff[1] << 16) | (buff[2] << 8) | buff[3];
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if(raw == 0xFFFFFFFF || raw == 0) return UT_SENSORSTATUS_TIMEOUT;
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//Определение состояния термопары
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uint8_t state = raw & 0b111;
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//Обрыв
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if(state == 0x01) {
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UNITEMP_DEBUG("%s has thermocouple open circuit", sensor->name);
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return UT_SENSORSTATUS_ERROR;
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}
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//Короткое замыкание к земле
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if(state == 0x02) {
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UNITEMP_DEBUG("%s has thermocouple short to GND", sensor->name);
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return UT_SENSORSTATUS_ERROR;
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}
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//Короткое замыкание к питанию
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if(state == 0x04) {
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UNITEMP_DEBUG("%s has thermocouple short to VCC", sensor->name);
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return UT_SENSORSTATUS_ERROR;
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}
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raw = (raw >> 16) & 0xFFFC;
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sensor->temp = (int16_t)(raw) / 16.0f;
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return UT_SENSORSTATUS_OK;
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}
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