128 lines
4.6 KiB
C
128 lines
4.6 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <math.h>
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#include "common-hal/microcontroller/Processor.h"
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#include "py/runtime.h"
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#include "supervisor/shared/translate.h"
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#include "stm32f4xx_hal.h"
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#define STM32_UUID ((uint32_t *)0x1FFF7A10)
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//Factory calibration locations
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#define ADC_CAL_ADDRESS (0x1fff7a2a)
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#define ADC_CAL1 ((uint16_t*)(ADC_CAL_ADDRESS + 2))
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#define ADC_CAL2 ((uint16_t*)(ADC_CAL_ADDRESS + 4))
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#define VREFIN_CAL ((uint16_t *)ADC_CAL_ADDRESS)
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// correction factor for reference value
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STATIC volatile float adc_refcor = 1.0f;
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STATIC void set_adc_params(ADC_HandleTypeDef *AdcHandle) {
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AdcHandle->Instance = ADC1;
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AdcHandle->Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
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AdcHandle->Init.Resolution = ADC_RESOLUTION_12B;
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AdcHandle->Init.ScanConvMode = DISABLE;
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AdcHandle->Init.ContinuousConvMode = DISABLE;
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AdcHandle->Init.DiscontinuousConvMode = DISABLE;
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AdcHandle->Init.NbrOfDiscConversion = 0;
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AdcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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AdcHandle->Init.ExternalTrigConv = ADC_SOFTWARE_START;
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AdcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
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AdcHandle->Init.NbrOfConversion = 1;
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AdcHandle->Init.DMAContinuousRequests = DISABLE;
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AdcHandle->Init.EOCSelection = ADC_EOC_SINGLE_CONV;
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}
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float common_hal_mcu_processor_get_temperature(void) {
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__HAL_RCC_ADC1_CLK_ENABLE();
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//HAL Implementation
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ADC_HandleTypeDef AdcHandle;
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ADC_ChannelConfTypeDef sConfig;
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set_adc_params(&AdcHandle);
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HAL_ADC_Init(&AdcHandle);
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ADC->CCR |= ADC_CCR_TSVREFE;
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ADC->CCR &= ~ADC_CCR_VBATE; // If this somehow got turned on, it'll return bad values.
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sConfig.Channel = ADC_CHANNEL_TEMPSENSOR; //either 16 or 18, depending on chip
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sConfig.Rank = 1;
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Temp sensor likes 10us minimum
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HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
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HAL_ADC_Start(&AdcHandle);
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if (HAL_ADC_PollForConversion(&AdcHandle,1) != HAL_OK) {
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mp_raise_RuntimeError(translate("Temperature read timed out"));
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}
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uint32_t value = (uint32_t)HAL_ADC_GetValue(&AdcHandle);
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HAL_ADC_Stop(&AdcHandle);
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//There's no F4 specific appnote for this but it works the same as the L1 in AN3964
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float core_temp_avg_slope = (*ADC_CAL2 - *ADC_CAL1) / 80.0;
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return (((float)value * adc_refcor - *ADC_CAL1) / core_temp_avg_slope) + 30.0f;
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}
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float common_hal_mcu_processor_get_voltage(void) {
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__HAL_RCC_ADC1_CLK_ENABLE();
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//HAL Implementation
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ADC_HandleTypeDef AdcHandle;
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ADC_ChannelConfTypeDef sConfig;
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set_adc_params(&AdcHandle);
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HAL_ADC_Init(&AdcHandle);
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ADC->CCR |= ADC_CCR_TSVREFE;
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sConfig.Channel = ADC_CHANNEL_VREFINT;
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sConfig.Rank = 1;
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
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HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
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HAL_ADC_Start(&AdcHandle);
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if (HAL_ADC_PollForConversion(&AdcHandle,1) != HAL_OK) {
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mp_raise_RuntimeError(translate("Voltage read timed out"));
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}
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uint32_t value = (uint32_t)HAL_ADC_GetValue(&AdcHandle);
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HAL_ADC_Stop(&AdcHandle);
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//This value could be used to actively correct ADC values.
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adc_refcor = ((float)(*VREFIN_CAL)) / ((float)value);
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return adc_refcor * 3.3f;
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}
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uint32_t common_hal_mcu_processor_get_frequency(void) {
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return SystemCoreClock;
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}
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void common_hal_mcu_processor_get_uid(uint8_t raw_id[]) {
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for (int i=0; i<3; i++) {
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((uint32_t*) raw_id)[i] = STM32_UUID[i];
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}
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}
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