mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-24 03:33:08 +00:00
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
|
|
Unitemp - Universal temperature reader
|
|
Copyright (C) 2022-2023 Victor Nikitchuk (https://github.com/quen0n)
|
|
|
|
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 <https://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "MAX31855.h"
|
|
|
|
const SensorType MAX31855 = {
|
|
.typename = "MAX31855",
|
|
.altname = "MAX31855 (Thermocouple)",
|
|
.interface = &SPI,
|
|
.datatype = UT_TEMPERATURE,
|
|
.pollingInterval = 500,
|
|
.allocator = unitemp_MAX31855_alloc,
|
|
.mem_releaser = unitemp_MAX31855_free,
|
|
.initializer = unitemp_MAX31855_init,
|
|
.deinitializer = unitemp_MAX31855_deinit,
|
|
.updater = unitemp_MAX31855_update};
|
|
|
|
bool unitemp_MAX31855_alloc(Sensor* sensor, char* args) {
|
|
UNUSED(sensor);
|
|
UNUSED(args);
|
|
return true;
|
|
}
|
|
|
|
bool unitemp_MAX31855_free(Sensor* sensor) {
|
|
UNUSED(sensor);
|
|
return true;
|
|
}
|
|
|
|
bool unitemp_MAX31855_init(Sensor* sensor) {
|
|
SPISensor* instance = sensor->instance;
|
|
furi_hal_spi_bus_handle_init(instance->spi);
|
|
UNUSED(instance);
|
|
return true;
|
|
}
|
|
|
|
bool unitemp_MAX31855_deinit(Sensor* sensor) {
|
|
UNUSED(sensor);
|
|
return true;
|
|
}
|
|
|
|
UnitempStatus unitemp_MAX31855_update(Sensor* sensor) {
|
|
SPISensor* instance = sensor->instance;
|
|
|
|
furi_hal_spi_acquire(instance->spi);
|
|
furi_hal_gpio_write(instance->CS_pin->pin, false);
|
|
|
|
uint8_t buff[4] = {0};
|
|
|
|
furi_hal_spi_bus_rx(instance->spi, buff, 4, 0xFF);
|
|
furi_hal_spi_release(instance->spi);
|
|
|
|
uint32_t raw = (buff[0] << 24) | (buff[1] << 16) | (buff[2] << 8) | buff[3];
|
|
|
|
if(raw == 0xFFFFFFFF || raw == 0) return UT_SENSORSTATUS_TIMEOUT;
|
|
|
|
//Определение состояния термопары
|
|
uint8_t state = raw & 0b111;
|
|
//Обрыв
|
|
if(state == 0x01) {
|
|
UNITEMP_DEBUG("%s has thermocouple open circuit", sensor->name);
|
|
return UT_SENSORSTATUS_ERROR;
|
|
}
|
|
//Короткое замыкание к земле
|
|
if(state == 0x02) {
|
|
UNITEMP_DEBUG("%s has thermocouple short to GND", sensor->name);
|
|
return UT_SENSORSTATUS_ERROR;
|
|
}
|
|
//Короткое замыкание к питанию
|
|
if(state == 0x04) {
|
|
UNITEMP_DEBUG("%s has thermocouple short to VCC", sensor->name);
|
|
return UT_SENSORSTATUS_ERROR;
|
|
}
|
|
|
|
raw = (raw >> 16) & 0xFFFC;
|
|
|
|
sensor->temp = (int16_t)(raw) / 16.0f;
|
|
|
|
return UT_SENSORSTATUS_OK;
|
|
}
|