/* mbed Microcontroller Library * SPDX-License-Identifier: BSD-3-Clause ****************************************************************************** * * Copyright (c) 2015-2021 STMicroelectronics. * All rights reserved. * * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** */ #include "mbed_assert.h" #include "analogin_api.h" #if DEVICE_ANALOGIN #include "mbed_wait_api.h" #include "cmsis.h" #include "pinmap.h" #include "mbed_error.h" #include "PeripheralPins.h" #if STATIC_PINMAP_READY #define ANALOGIN_INIT_DIRECT analogin_init_direct void analogin_init_direct(analogin_t *obj, const PinMap *pinmap) #else #define ANALOGIN_INIT_DIRECT _analogin_init_direct static void _analogin_init_direct(analogin_t *obj, const PinMap *pinmap) #endif { uint32_t function = (uint32_t)pinmap->function; // Get the peripheral name from the pin and assign it to the object obj->handle.Instance = (ADC_TypeDef *)pinmap->peripheral; // ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...) // are described in PinNames.h and PeripheralPins.c // Pin value must be between 0xF0 and 0xFF if ((pinmap->pin < 0xF0) || (pinmap->pin >= 0x100)) { // Configure GPIO pin_function(pinmap->pin, pinmap->function); pin_mode(pinmap->pin, PullNone); } else { // Internal channels // No GPIO configuration for internal channels } MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC); MBED_ASSERT(function != (uint32_t)NC); obj->channel = STM_PIN_CHANNEL(function); // Save pin number for the read function obj->pin = pinmap->pin; if (obj->handle.Instance == ADC1) { __HAL_RCC_ADC1_CLK_ENABLE(); } else if (obj->handle.Instance == ADC4) { __HAL_RCC_ADC4_CLK_ENABLE(); } else { error("ADC instance error\n"); } RCC_PeriphCLKInitTypeDef PeriphClkInit = {0}; PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADCDAC; PeriphClkInit.AdcDacClockSelection = RCC_ADCDACCLKSOURCE_HSI; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) { error("HAL_RCCEx_PeriphCLKConfig\n"); } // Configure ADC object structures obj->handle.State = HAL_ADC_STATE_RESET; obj->handle.DMA_Handle = NULL; obj->handle.Lock = HAL_UNLOCKED; obj->handle.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4; obj->handle.Init.Resolution = ADC_RESOLUTION_12B; obj->handle.Init.DataAlign = ADC_DATAALIGN_RIGHT; obj->handle.Init.ScanConvMode = ADC_SCAN_DISABLE; obj->handle.Init.EOCSelection = ADC_EOC_SINGLE_CONV; obj->handle.Init.LowPowerAutoWait = DISABLE; obj->handle.Init.LowPowerAutoPowerOff = ADC_LOW_POWER_NONE; obj->handle.Init.ContinuousConvMode = DISABLE; obj->handle.Init.NbrOfConversion = 1; obj->handle.Init.DiscontinuousConvMode = DISABLE; obj->handle.Init.DMAContinuousRequests = DISABLE; obj->handle.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH; obj->handle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN; obj->handle.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE; obj->handle.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR; obj->handle.Init.OversamplingMode = DISABLE; obj->handle.Init.GainCompensation = 0; obj->handle.Init.ExternalTrigConv = ADC_SOFTWARE_START; obj->handle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; obj->handle.Init.VrefProtection = ADC_VREF_PPROT_NONE; if (HAL_ADC_Init(&obj->handle) != HAL_OK) { error("Cannot initialize ADC\n"); } if (HAL_ADCEx_Calibration_Start(&obj->handle, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED) != HAL_OK) { error("HAL_ADCEx_Calibration_Start\n"); } } void analogin_init(analogin_t *obj, PinName pin) { int peripheral; int function; if ((pin < 0xF0) || (pin >= 0x100)) { peripheral = (int)pinmap_peripheral(pin, PinMap_ADC); function = (int)pinmap_find_function(pin, PinMap_ADC); } else { peripheral = (int)pinmap_peripheral(pin, PinMap_ADC_Internal); function = (int)pinmap_find_function(pin, PinMap_ADC_Internal); } const PinMap static_pinmap = {pin, peripheral, function}; ANALOGIN_INIT_DIRECT(obj, &static_pinmap); } uint16_t adc_read(analogin_t *obj) { ADC_ChannelConfTypeDef sConfig = {0}; // Configure ADC channel if (obj->handle.Instance == ADC1) { sConfig.Rank = ADC_REGULAR_RANK_1; sConfig.SamplingTime = ADC_SAMPLETIME_36CYCLES; } else if (obj->handle.Instance == ADC4) { sConfig.Rank = ADC4_REGULAR_RANK_1; sConfig.SamplingTime = ADC4_SAMPLETIME_12CYCLES_5; } sConfig.SingleDiff = ADC_SINGLE_ENDED; sConfig.OffsetNumber = ADC_OFFSET_NONE; sConfig.Offset = 0; sConfig.OffsetRightShift = DISABLE; sConfig.OffsetSignedSaturation = DISABLE; switch (obj->channel) { case 0: sConfig.Channel = ADC_CHANNEL_VREFINT; sConfig.SamplingTime = ADC_SAMPLETIME_391CYCLES_5; break; case 1: sConfig.Channel = ADC_CHANNEL_1; break; case 2: sConfig.Channel = ADC_CHANNEL_2; break; case 3: sConfig.Channel = ADC_CHANNEL_3; break; case 4: sConfig.Channel = ADC_CHANNEL_4; break; case 5: sConfig.Channel = ADC_CHANNEL_5; break; case 6: sConfig.Channel = ADC_CHANNEL_6; break; case 7: sConfig.Channel = ADC_CHANNEL_7; break; case 8: sConfig.Channel = ADC_CHANNEL_8; break; case 9: sConfig.Channel = ADC_CHANNEL_9; break; case 10: sConfig.Channel = ADC_CHANNEL_10; break; case 11: sConfig.Channel = ADC_CHANNEL_11; break; case 12: sConfig.Channel = ADC_CHANNEL_12; break; case 13: sConfig.Channel = ADC_CHANNEL_13; break; case 14: sConfig.Channel = ADC_CHANNEL_14; break; case 15: sConfig.Channel = ADC_CHANNEL_15; break; case 16: sConfig.Channel = ADC_CHANNEL_16; break; case 17: sConfig.Channel = ADC_CHANNEL_17; break; case 18: sConfig.Channel = ADC_CHANNEL_VBAT; sConfig.SamplingTime = ADC_SAMPLETIME_814CYCLES; break; case 19: sConfig.Channel = ADC_CHANNEL_TEMPSENSOR; sConfig.SamplingTime = ADC_SAMPLETIME_391CYCLES_5; break; default: error("ADC channel not expected\n"); } if (HAL_ADC_ConfigChannel(&obj->handle, &sConfig) != HAL_OK) { error("HAL_ADC_ConfigChannel\n"); } if (HAL_ADC_Start(&obj->handle) != HAL_OK) { error("HAL_ADC_Start\n"); } // Wait end of conversion and get value uint16_t adcValue = 0; if (HAL_ADC_PollForConversion(&obj->handle, 10) != HAL_OK) { error("HAL_ADC_PollForConversion error 0x%x\n", obj->handle.State); } else { adcValue = (uint16_t)HAL_ADC_GetValue(&obj->handle); } if (HAL_ADC_Stop(&obj->handle) != HAL_OK) { error("HAL_ADC_Stop\n"); } LL_ADC_SetCommonPathInternalCh(__LL_ADC_COMMON_INSTANCE((&obj->handle)->Instance), LL_ADC_PATH_INTERNAL_NONE); return adcValue; } const PinMap *analogin_pinmap() { return PinMap_ADC; } #endif