circuitpython/ports/stm/common-hal/microcontroller/Processor.c

148 lines
5.0 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <math.h>
#include "py/runtime.h"
#include "common-hal/microcontroller/Processor.h"
#include "shared-bindings/microcontroller/ResetReason.h"
#include "supervisor/shared/translate.h"
#include STM32_HAL_H
#if CPY_STM32F4
#define STM32_UUID ((uint32_t *)0x1FFF7A10)
//Factory calibration locations
#define ADC_CAL_ADDRESS (0x1fff7a2a)
#define ADC_CAL1 ((uint16_t*)(ADC_CAL_ADDRESS + 2))
#define ADC_CAL2 ((uint16_t*)(ADC_CAL_ADDRESS + 4))
#define VREFIN_CAL ((uint16_t *)ADC_CAL_ADDRESS)
// correction factor for reference value
STATIC volatile float adc_refcor = 1.0f;
STATIC void set_adc_params(ADC_HandleTypeDef *AdcHandle) {
AdcHandle->Instance = ADC1;
AdcHandle->Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
AdcHandle->Init.Resolution = ADC_RESOLUTION_12B;
AdcHandle->Init.ScanConvMode = DISABLE;
AdcHandle->Init.ContinuousConvMode = DISABLE;
AdcHandle->Init.DiscontinuousConvMode = DISABLE;
AdcHandle->Init.NbrOfDiscConversion = 0;
AdcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
AdcHandle->Init.ExternalTrigConv = ADC_SOFTWARE_START;
AdcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
AdcHandle->Init.NbrOfConversion = 1;
AdcHandle->Init.DMAContinuousRequests = DISABLE;
AdcHandle->Init.EOCSelection = ADC_EOC_SINGLE_CONV;
}
#endif
float common_hal_mcu_processor_get_temperature(void) {
#if CPY_STM32F4
__HAL_RCC_ADC1_CLK_ENABLE();
//HAL Implementation
ADC_HandleTypeDef AdcHandle;
ADC_ChannelConfTypeDef sConfig;
set_adc_params(&AdcHandle);
HAL_ADC_Init(&AdcHandle);
ADC->CCR |= ADC_CCR_TSVREFE;
ADC->CCR &= ~ADC_CCR_VBATE; // If this somehow got turned on, it'll return bad values.
sConfig.Channel = ADC_CHANNEL_TEMPSENSOR; //either 16 or 18, depending on chip
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Temp sensor likes 10us minimum
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
HAL_ADC_Start(&AdcHandle);
if (HAL_ADC_PollForConversion(&AdcHandle,1) != HAL_OK) {
mp_raise_RuntimeError(translate("Temperature read timed out"));
}
uint32_t value = (uint32_t)HAL_ADC_GetValue(&AdcHandle);
HAL_ADC_Stop(&AdcHandle);
//There's no F4 specific appnote for this but it works the same as the L1 in AN3964
float core_temp_avg_slope = (*ADC_CAL2 - *ADC_CAL1) / 80.0;
return (((float)value * adc_refcor - *ADC_CAL1) / core_temp_avg_slope) + 30.0f;
#else
return false;
#endif
}
float common_hal_mcu_processor_get_voltage(void) {
#if CPY_STM32F4
__HAL_RCC_ADC1_CLK_ENABLE();
//HAL Implementation
ADC_HandleTypeDef AdcHandle;
ADC_ChannelConfTypeDef sConfig;
set_adc_params(&AdcHandle);
HAL_ADC_Init(&AdcHandle);
ADC->CCR |= ADC_CCR_TSVREFE;
sConfig.Channel = ADC_CHANNEL_VREFINT;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
HAL_ADC_Start(&AdcHandle);
if (HAL_ADC_PollForConversion(&AdcHandle,1) != HAL_OK) {
mp_raise_RuntimeError(translate("Voltage read timed out"));
}
uint32_t value = (uint32_t)HAL_ADC_GetValue(&AdcHandle);
HAL_ADC_Stop(&AdcHandle);
//This value could be used to actively correct ADC values.
adc_refcor = ((float)(*VREFIN_CAL)) / ((float)value);
return adc_refcor * 3.3f;
#else
return false;
#endif
}
uint32_t common_hal_mcu_processor_get_frequency(void) {
return SystemCoreClock;
}
void common_hal_mcu_processor_get_uid(uint8_t raw_id[]) {
#if CPY_STM32F4
for (int i=0; i<3; i++) {
((uint32_t*) raw_id)[i] = STM32_UUID[i];
}
#endif
}
mcu_reset_reason_t common_hal_mcu_processor_get_reset_reason(void) {
return RESET_REASON_UNKNOWN;
}