mirror of https://github.com/ARMmbed/mbed-os.git
282 lines
9.7 KiB
C
282 lines
9.7 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2015, STMicroelectronics
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "mbed_assert.h"
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#include "analogin_api.h"
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#if DEVICE_ANALOGIN
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#include "mbed_wait_api.h"
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#include "cmsis.h"
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#include "pinmap.h"
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#include "mbed_error.h"
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#include "PeripheralPins.h"
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void analogin_init(analogin_t *obj, PinName pin)
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{
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uint32_t function = (uint32_t)NC;
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// ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
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// are described in PinNames.h and PeripheralPins.c
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// Pin value must be between 0xF0 and 0xFF
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if ((pin < 0xF0) || (pin >= ALT0)) {
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// Normal channels
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// Get the peripheral name from the pin and assign it to the object
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obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC);
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// Get the functions (adc channel) from the pin and assign it to the object
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function = pinmap_function(pin, PinMap_ADC);
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// Configure GPIO
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pinmap_pinout(pin, PinMap_ADC);
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} else {
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// Internal channels
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obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC_Internal);
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function = pinmap_function(pin, PinMap_ADC_Internal);
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// No GPIO configuration for internal channels
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}
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MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
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MBED_ASSERT(function != (uint32_t)NC);
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#if defined(ALTC)
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if (pin == PA_0C) {
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HAL_SYSCFG_AnalogSwitchConfig(SYSCFG_SWITCH_PA0, SYSCFG_SWITCH_PA0_OPEN);
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}
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if (pin == PA_1C) {
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HAL_SYSCFG_AnalogSwitchConfig(SYSCFG_SWITCH_PA1, SYSCFG_SWITCH_PA1_OPEN);
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}
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if (pin == PC_2C) {
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HAL_SYSCFG_AnalogSwitchConfig(SYSCFG_SWITCH_PC2, SYSCFG_SWITCH_PC2_OPEN);
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}
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if (pin == PC_3C) {
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HAL_SYSCFG_AnalogSwitchConfig(SYSCFG_SWITCH_PC3, SYSCFG_SWITCH_PC3_OPEN);
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}
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#endif /* ALTC */
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obj->channel = STM_PIN_CHANNEL(function);
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obj->differential = STM_PIN_INVERTED(function);
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// Save pin number for the read function
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obj->pin = pin;
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// Configure ADC object structures
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obj->handle.State = HAL_ADC_STATE_RESET;
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obj->handle.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4;
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obj->handle.Init.Resolution = ADC_RESOLUTION_16B;
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obj->handle.Init.ScanConvMode = ADC_SCAN_DISABLE;
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obj->handle.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
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obj->handle.Init.LowPowerAutoWait = DISABLE;
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obj->handle.Init.ContinuousConvMode = DISABLE;
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obj->handle.Init.NbrOfConversion = 1;
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obj->handle.Init.DiscontinuousConvMode = DISABLE;
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obj->handle.Init.NbrOfDiscConversion = 0;
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obj->handle.Init.ExternalTrigConv = ADC_SOFTWARE_START;
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obj->handle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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obj->handle.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;
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obj->handle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
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obj->handle.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;
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obj->handle.Init.OversamplingMode = DISABLE;
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#if defined(DUAL_CORE)
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while (LL_HSEM_1StepLock(HSEM, CFG_HW_RCC_SEMID)) {
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}
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#endif /* DUAL_CORE */
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RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
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PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_ADC;
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PeriphClkInitStruct.PLL2.PLL2M = 4;
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PeriphClkInitStruct.PLL2.PLL2N = 240;
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PeriphClkInitStruct.PLL2.PLL2P = 2;
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PeriphClkInitStruct.PLL2.PLL2Q = 2;
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PeriphClkInitStruct.PLL2.PLL2R = 2;
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PeriphClkInitStruct.PLL2.PLL2RGE = RCC_PLL2VCIRANGE_1;
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PeriphClkInitStruct.PLL2.PLL2VCOSEL = RCC_PLL2VCOWIDE;
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PeriphClkInitStruct.PLL2.PLL2FRACN = 0;
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PeriphClkInitStruct.AdcClockSelection = RCC_ADCCLKSOURCE_PLL2;
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if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
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error("analogin_init HAL_RCCEx_PeriphCLKConfig");
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}
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#if defined(DUAL_CORE)
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LL_HSEM_ReleaseLock(HSEM, CFG_HW_RCC_SEMID, HSEM_CR_COREID_CURRENT);
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#endif /* DUAL_CORE */
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#if defined(ADC1)
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if ((ADCName)obj->handle.Instance == ADC_1) {
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__HAL_RCC_ADC12_CLK_ENABLE();
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}
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#endif
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#if defined(ADC2)
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if ((ADCName)obj->handle.Instance == ADC_2) {
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__HAL_RCC_ADC12_CLK_ENABLE();
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}
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#endif
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#if defined(ADC3)
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if ((ADCName)obj->handle.Instance == ADC_3) {
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__HAL_RCC_ADC3_CLK_ENABLE();
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}
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#endif
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if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
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error("analogin_init HAL_ADC_Init");
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}
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if ((ADCName)obj->handle.Instance == ADC_1) {
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ADC_MultiModeTypeDef multimode = {0};
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multimode.Mode = ADC_MODE_INDEPENDENT;
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if (HAL_ADCEx_MultiModeConfigChannel(&obj->handle, &multimode) != HAL_OK) {
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error("HAL_ADCEx_MultiModeConfigChannel HAL_ADC_Init");
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}
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}
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// Calibration
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if (obj->differential) {
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HAL_ADCEx_Calibration_Start(&obj->handle, ADC_CALIB_OFFSET, ADC_DIFFERENTIAL_ENDED);
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} else {
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HAL_ADCEx_Calibration_Start(&obj->handle, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED);
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}
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}
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uint16_t adc_read(analogin_t *obj)
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{
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ADC_ChannelConfTypeDef sConfig = {0};
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// Configure ADC channel
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sConfig.Rank = ADC_REGULAR_RANK_1;
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sConfig.SamplingTime = ADC_SAMPLETIME_64CYCLES_5;
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sConfig.Offset = 0;
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if (obj->differential) {
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sConfig.SingleDiff = ADC_DIFFERENTIAL_ENDED;
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} else {
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sConfig.SingleDiff = ADC_SINGLE_ENDED;
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}
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sConfig.OffsetNumber = ADC_OFFSET_NONE;
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sConfig.OffsetRightShift = DISABLE;
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sConfig.OffsetSignedSaturation = DISABLE;
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switch (obj->channel) {
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case 0:
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sConfig.Channel = ADC_CHANNEL_0;
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break;
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case 1:
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sConfig.Channel = ADC_CHANNEL_1;
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break;
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case 2:
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sConfig.Channel = ADC_CHANNEL_2;
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break;
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case 3:
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sConfig.Channel = ADC_CHANNEL_3;
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break;
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case 4:
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sConfig.Channel = ADC_CHANNEL_4;
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break;
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case 5:
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sConfig.Channel = ADC_CHANNEL_5;
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break;
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case 6:
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sConfig.Channel = ADC_CHANNEL_6;
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break;
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case 7:
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sConfig.Channel = ADC_CHANNEL_7;
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break;
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case 8:
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sConfig.Channel = ADC_CHANNEL_8;
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break;
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case 9:
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sConfig.Channel = ADC_CHANNEL_9;
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break;
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case 10:
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sConfig.Channel = ADC_CHANNEL_10;
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break;
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case 11:
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sConfig.Channel = ADC_CHANNEL_11;
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break;
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case 12:
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sConfig.Channel = ADC_CHANNEL_12;
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break;
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case 13:
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sConfig.Channel = ADC_CHANNEL_13;
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break;
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case 14:
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sConfig.Channel = ADC_CHANNEL_14;
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break;
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case 15:
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sConfig.Channel = ADC_CHANNEL_15;
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break;
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case 16:
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sConfig.Channel = ADC_CHANNEL_16;
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break;
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case 17:
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sConfig.Channel = ADC_CHANNEL_17;
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if ((ADCName)obj->handle.Instance == ADC_3) {
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sConfig.Channel = ADC_CHANNEL_VBAT;
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sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5;
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}
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break;
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case 18:
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sConfig.Channel = ADC_CHANNEL_18;
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if ((ADCName)obj->handle.Instance == ADC_3) {
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sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
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sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5;
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}
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break;
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case 19:
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sConfig.Channel = ADC_CHANNEL_19;
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if ((ADCName)obj->handle.Instance == ADC_3) {
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sConfig.Channel = ADC_CHANNEL_VREFINT;
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sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5;
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}
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break;
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default:
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return 0;
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}
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if (HAL_ADC_ConfigChannel(&obj->handle, &sConfig) != HAL_OK) {
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error("HAL_ADC_ConfigChannel issue");
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}
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if (HAL_ADC_Start(&obj->handle) != HAL_OK) {
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error("HAL_ADC_Start issue");
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}
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// Wait end of conversion and get value
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uint16_t adcValue = 0;
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if (HAL_ADC_PollForConversion(&obj->handle, 10) == HAL_OK) {
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adcValue = (uint16_t)HAL_ADC_GetValue(&obj->handle);
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}
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LL_ADC_SetCommonPathInternalCh(__LL_ADC_COMMON_INSTANCE((&obj->handle)->Instance), LL_ADC_PATH_INTERNAL_NONE);
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return adcValue;
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}
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const PinMap *analogin_pinmap()
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{
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return PinMap_ADC;
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}
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#endif
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