mbed library sources
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Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/analogin_api.c
- Revision:
- 429:cc5da43e7bf6
- Parent:
- 428:4ddf7f7eabbb
- Child:
- 430:d406b7919023
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/analogin_api.c Mon Dec 08 07:30:07 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,169 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2014, STMicroelectronics - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * 3. Neither the name of STMicroelectronics nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ -#include "mbed_assert.h" -#include "analogin_api.h" - -#if DEVICE_ANALOGIN - -#include "wait_api.h" -#include "cmsis.h" -#include "pinmap.h" -#include "PeripheralPins.h" - -ADC_HandleTypeDef AdcHandle; - -int adc_inited = 0; - -void analogin_init(analogin_t *obj, PinName pin) -{ - // Get the peripheral name from the pin and assign it to the object - obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); - MBED_ASSERT(obj->adc != (ADCName)NC); - - // Configure GPIO - pinmap_pinout(pin, PinMap_ADC); - - // Save pin number for the read function - obj->pin = pin; - - // The ADC initialization is done once - if (adc_inited == 0) { - adc_inited = 1; - - // Enable ADC clock - __ADC1_CLK_ENABLE(); - - // Configure ADC - AdcHandle.Instance = (ADC_TypeDef *)(obj->adc); - AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2; - AdcHandle.Init.Resolution = ADC_RESOLUTION12b; - 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_EXTERNALTRIGCONV_T1_CC1; - AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT; - AdcHandle.Init.NbrOfConversion = 1; - AdcHandle.Init.DMAContinuousRequests = DISABLE; - AdcHandle.Init.EOCSelection = DISABLE; - HAL_ADC_Init(&AdcHandle); - } -} - -static inline uint16_t adc_read(analogin_t *obj) -{ - ADC_ChannelConfTypeDef sConfig; - - AdcHandle.Instance = (ADC_TypeDef *)(obj->adc); - - // Configure ADC channel - sConfig.Rank = 1; - sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES; - sConfig.Offset = 0; - - switch (obj->pin) { - case PA_0: - sConfig.Channel = ADC_CHANNEL_0; - break; - case PA_1: - sConfig.Channel = ADC_CHANNEL_1; - break; - case PA_2: - sConfig.Channel = ADC_CHANNEL_2; - break; - case PA_3: - sConfig.Channel = ADC_CHANNEL_3; - break; - case PA_4: - sConfig.Channel = ADC_CHANNEL_4; - break; - case PA_5: - sConfig.Channel = ADC_CHANNEL_5; - break; - case PA_6: - sConfig.Channel = ADC_CHANNEL_6; - break; - case PA_7: - sConfig.Channel = ADC_CHANNEL_7; - break; - case PB_0: - sConfig.Channel = ADC_CHANNEL_8; - break; - case PB_1: - sConfig.Channel = ADC_CHANNEL_9; - break; - case PC_0: - sConfig.Channel = ADC_CHANNEL_10; - break; - case PC_1: - sConfig.Channel = ADC_CHANNEL_11; - break; - case PC_2: - sConfig.Channel = ADC_CHANNEL_12; - break; - case PC_3: - sConfig.Channel = ADC_CHANNEL_13; - break; - case PC_4: - sConfig.Channel = ADC_CHANNEL_14; - break; - case PC_5: - sConfig.Channel = ADC_CHANNEL_15; - break; - default: - return 0; - } - - HAL_ADC_ConfigChannel(&AdcHandle, &sConfig); - - HAL_ADC_Start(&AdcHandle); // Start conversion - - // Wait end of conversion and get value - if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) { - return (HAL_ADC_GetValue(&AdcHandle)); - } else { - return 0; - } -} - -uint16_t analogin_read_u16(analogin_t *obj) -{ - uint16_t value = adc_read(obj); - // 12-bit to 16-bit conversion - value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F); - return value; -} - -float analogin_read(analogin_t *obj) -{ - uint16_t value = adc_read(obj); - return (float)value * (1.0f / (float)0xFFF); // 12 bits range -} - -#endif