reflow-oven-control-sw/stm-firmware/include/reflow-controller/safety/safety-adc.h

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/* Reflow Oven Controller
*
* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware 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 the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __SAFETY_ADC_H__
#define __SAFETY_ADC_H__
#include <stdint.h>
#include <stdbool.h>
#define SAFETY_ADC_VREF_MVOLT (2500.0f)
#define SAFETY_ADC_VREF_TOL_MVOLT (100.0f)
#define SAFETY_ADC_TEMP_LOW_LIM (0.0f)
#define SAFETY_ADC_TEMP_HIGH_LIM (65.0f)
enum safety_adc_meas_channel {SAFETY_ADC_MEAS_VREF, SAFETY_ADC_MEAS_TEMP};
enum safety_adc_check_result {
SAFETY_ADC_CHECK_OK = 0UL,
SAFETY_ADC_CHECK_VREF_LOW = (1U<<0),
SAFETY_ADC_CHECK_VREF_HIGH = (1U<<1),
SAFETY_ADC_CHECK_TEMP_LOW = (1U<<2),
SAFETY_ADC_CHECK_TEMP_HIGH = (1U<<3),
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SAFETY_ADC_INTERNAL_ERROR = (1U<<4),
};
extern enum safety_adc_check_result global_safety_adc_status;
enum safety_adc_check_result safety_adc_get_errors();
void safety_adc_clear_errors(void);
void safety_adc_init();
void safety_adc_deinit();
void safety_adc_trigger_meas(enum safety_adc_meas_channel measurement);
/**
* @brief Poll ADC result.
* @param results adc results
* @return 1 if measurement successful, 0 if not ready, -1 if ADC aborted or not started
*/
int safety_adc_poll_result(uint16_t *adc_result);
enum safety_adc_check_result safety_adc_check_results(uint16_t vref_result, uint16_t temp_result,
float *vref_calculated, float *temp_calculated);
enum safety_adc_check_result handle_safety_adc();
float safety_adc_get_temp();
float safety_adc_get_vref();
#endif /* __SAFETY_ADC_H__ */