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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_STM32F0/analogin_api.c@630:825f75ca301e, 2015-09-28 (annotated)

Committer:
mbed_official
Date:
Mon Sep 28 10:45:10 2015 +0100
Revision:
630:825f75ca301e
Parent:
469:fc4922e0c183 
Synchronized with git revision 54fbe4144faf309c37205a5d39fa665daa919f10



Full URL: https://github.com/mbedmicro/mbed/commit/54fbe4144faf309c37205a5d39fa665daa919f10/



NUCLEO_F031K6 : Add new target

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 469:fc4922e0c183 1 /* mbed Microcontroller Library
mbed_official 630:825f75ca301e 2 * Copyright (c) 2015, STMicroelectronics
mbed_official 469:fc4922e0c183 3 * All rights reserved.
mbed_official 469:fc4922e0c183 4 *
mbed_official 469:fc4922e0c183 5 * Redistribution and use in source and binary forms, with or without
mbed_official 469:fc4922e0c183 6 * modification, are permitted provided that the following conditions are met:
mbed_official 469:fc4922e0c183 7 *
mbed_official 469:fc4922e0c183 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 469:fc4922e0c183 9 * this list of conditions and the following disclaimer.
mbed_official 469:fc4922e0c183 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 469:fc4922e0c183 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 469:fc4922e0c183 12 * and/or other materials provided with the distribution.
mbed_official 469:fc4922e0c183 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 469:fc4922e0c183 14 * may be used to endorse or promote products derived from this software
mbed_official 469:fc4922e0c183 15 * without specific prior written permission.
mbed_official 469:fc4922e0c183 16 *
mbed_official 469:fc4922e0c183 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 469:fc4922e0c183 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 469:fc4922e0c183 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 469:fc4922e0c183 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 469:fc4922e0c183 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 469:fc4922e0c183 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 469:fc4922e0c183 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 469:fc4922e0c183 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 469:fc4922e0c183 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 469:fc4922e0c183 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 469:fc4922e0c183 27 */
mbed_official 469:fc4922e0c183 28 #include "mbed_assert.h"
mbed_official 469:fc4922e0c183 29 #include "analogin_api.h"
mbed_official 469:fc4922e0c183 30
mbed_official 469:fc4922e0c183 31 #if DEVICE_ANALOGIN
mbed_official 469:fc4922e0c183 32
mbed_official 469:fc4922e0c183 33 #include "wait_api.h"
mbed_official 469:fc4922e0c183 34 #include "cmsis.h"
mbed_official 469:fc4922e0c183 35 #include "pinmap.h"
mbed_official 469:fc4922e0c183 36 #include "PeripheralPins.h"
mbed_official 630:825f75ca301e 37 #include "mbed_error.h"
mbed_official 469:fc4922e0c183 38
mbed_official 469:fc4922e0c183 39 ADC_HandleTypeDef AdcHandle;
mbed_official 469:fc4922e0c183 40
mbed_official 469:fc4922e0c183 41 int adc_inited = 0;
mbed_official 469:fc4922e0c183 42
mbed_official 630:825f75ca301e 43 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 469:fc4922e0c183 44 // Get the peripheral name from the pin and assign it to the object
mbed_official 469:fc4922e0c183 45 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 469:fc4922e0c183 46 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 469:fc4922e0c183 47
mbed_official 469:fc4922e0c183 48 // Configure GPIO
mbed_official 469:fc4922e0c183 49 pinmap_pinout(pin, PinMap_ADC);
mbed_official 469:fc4922e0c183 50
mbed_official 469:fc4922e0c183 51 // Save pin number for the read function
mbed_official 469:fc4922e0c183 52 obj->pin = pin;
mbed_official 469:fc4922e0c183 53
mbed_official 469:fc4922e0c183 54 // The ADC initialization is done once
mbed_official 469:fc4922e0c183 55 if (adc_inited == 0) {
mbed_official 469:fc4922e0c183 56 adc_inited = 1;
mbed_official 469:fc4922e0c183 57
mbed_official 469:fc4922e0c183 58 // Enable ADC clock
mbed_official 469:fc4922e0c183 59 __ADC1_CLK_ENABLE();
mbed_official 469:fc4922e0c183 60
mbed_official 469:fc4922e0c183 61 // Configure ADC
mbed_official 469:fc4922e0c183 62 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 469:fc4922e0c183 63 AdcHandle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
mbed_official 469:fc4922e0c183 64 AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
mbed_official 469:fc4922e0c183 65 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
mbed_official 469:fc4922e0c183 66 AdcHandle.Init.ScanConvMode = DISABLE;
mbed_official 469:fc4922e0c183 67 AdcHandle.Init.EOCSelection = EOC_SINGLE_CONV;
mbed_official 469:fc4922e0c183 68 AdcHandle.Init.LowPowerAutoWait = DISABLE;
mbed_official 469:fc4922e0c183 69 AdcHandle.Init.LowPowerAutoPowerOff = DISABLE;
mbed_official 469:fc4922e0c183 70 AdcHandle.Init.ContinuousConvMode = DISABLE;
mbed_official 469:fc4922e0c183 71 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
mbed_official 469:fc4922e0c183 72 AdcHandle.Init.ExternalTrigConv = ADC_SOFTWARE_START;
mbed_official 469:fc4922e0c183 73 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
mbed_official 469:fc4922e0c183 74 AdcHandle.Init.DMAContinuousRequests = DISABLE;
mbed_official 469:fc4922e0c183 75 AdcHandle.Init.Overrun = OVR_DATA_OVERWRITTEN;
mbed_official 630:825f75ca301e 76 if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
mbed_official 630:825f75ca301e 77 error("Cannot initialize ADC");
mbed_official 630:825f75ca301e 78 }
mbed_official 469:fc4922e0c183 79 // Run the ADC calibration
mbed_official 630:825f75ca301e 80 if (HAL_ADCEx_Calibration_Start(&AdcHandle) != HAL_OK) {
mbed_official 630:825f75ca301e 81 error("Cannot Start ADC_Calibration");
mbed_official 630:825f75ca301e 82 }
mbed_official 469:fc4922e0c183 83 }
mbed_official 469:fc4922e0c183 84 }
mbed_official 469:fc4922e0c183 85
mbed_official 630:825f75ca301e 86 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 469:fc4922e0c183 87 ADC_ChannelConfTypeDef sConfig;
mbed_official 469:fc4922e0c183 88
mbed_official 469:fc4922e0c183 89 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 469:fc4922e0c183 90
mbed_official 469:fc4922e0c183 91 // Configure ADC channel
mbed_official 469:fc4922e0c183 92 sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
mbed_official 469:fc4922e0c183 93 #if defined (TARGET_STM32F091RC)
mbed_official 469:fc4922e0c183 94 sConfig.SamplingTime = ADC_SAMPLETIME_13CYCLES_5;
mbed_official 469:fc4922e0c183 95 #else
mbed_official 469:fc4922e0c183 96 sConfig.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
mbed_official 469:fc4922e0c183 97 #endif
mbed_official 469:fc4922e0c183 98
mbed_official 469:fc4922e0c183 99 switch (obj->pin) {
mbed_official 469:fc4922e0c183 100 case PA_0:
mbed_official 469:fc4922e0c183 101 sConfig.Channel = ADC_CHANNEL_0;
mbed_official 469:fc4922e0c183 102 break;
mbed_official 469:fc4922e0c183 103 case PA_1:
mbed_official 469:fc4922e0c183 104 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 469:fc4922e0c183 105 break;
mbed_official 469:fc4922e0c183 106 case PA_2:
mbed_official 469:fc4922e0c183 107 sConfig.Channel = ADC_CHANNEL_2;
mbed_official 469:fc4922e0c183 108 break;
mbed_official 469:fc4922e0c183 109 case PA_3:
mbed_official 469:fc4922e0c183 110 sConfig.Channel = ADC_CHANNEL_3;
mbed_official 469:fc4922e0c183 111 break;
mbed_official 469:fc4922e0c183 112 case PA_4:
mbed_official 469:fc4922e0c183 113 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 469:fc4922e0c183 114 break;
mbed_official 469:fc4922e0c183 115 case PA_5:
mbed_official 469:fc4922e0c183 116 sConfig.Channel = ADC_CHANNEL_5;
mbed_official 469:fc4922e0c183 117 break;
mbed_official 469:fc4922e0c183 118 case PA_6:
mbed_official 469:fc4922e0c183 119 sConfig.Channel = ADC_CHANNEL_6;
mbed_official 469:fc4922e0c183 120 break;
mbed_official 469:fc4922e0c183 121 case PA_7:
mbed_official 469:fc4922e0c183 122 sConfig.Channel = ADC_CHANNEL_7;
mbed_official 469:fc4922e0c183 123 break;
mbed_official 469:fc4922e0c183 124 case PB_0:
mbed_official 469:fc4922e0c183 125 sConfig.Channel = ADC_CHANNEL_8;
mbed_official 469:fc4922e0c183 126 break;
mbed_official 469:fc4922e0c183 127 case PB_1:
mbed_official 469:fc4922e0c183 128 sConfig.Channel = ADC_CHANNEL_9;
mbed_official 469:fc4922e0c183 129 break;
mbed_official 630:825f75ca301e 130 #if !defined (TARGET_STM32F031K6)
mbed_official 469:fc4922e0c183 131 case PC_0:
mbed_official 469:fc4922e0c183 132 sConfig.Channel = ADC_CHANNEL_10;
mbed_official 469:fc4922e0c183 133 break;
mbed_official 469:fc4922e0c183 134 case PC_1:
mbed_official 469:fc4922e0c183 135 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 469:fc4922e0c183 136 break;
mbed_official 469:fc4922e0c183 137 case PC_2:
mbed_official 469:fc4922e0c183 138 sConfig.Channel = ADC_CHANNEL_12;
mbed_official 469:fc4922e0c183 139 break;
mbed_official 469:fc4922e0c183 140 case PC_3:
mbed_official 469:fc4922e0c183 141 sConfig.Channel = ADC_CHANNEL_13;
mbed_official 469:fc4922e0c183 142 break;
mbed_official 469:fc4922e0c183 143 case PC_4:
mbed_official 469:fc4922e0c183 144 sConfig.Channel = ADC_CHANNEL_14;
mbed_official 469:fc4922e0c183 145 break;
mbed_official 469:fc4922e0c183 146 case PC_5:
mbed_official 469:fc4922e0c183 147 sConfig.Channel = ADC_CHANNEL_15;
mbed_official 469:fc4922e0c183 148 break;
mbed_official 630:825f75ca301e 149 #endif
mbed_official 469:fc4922e0c183 150 default:
mbed_official 469:fc4922e0c183 151 return 0;
mbed_official 469:fc4922e0c183 152 }
mbed_official 469:fc4922e0c183 153
mbed_official 469:fc4922e0c183 154 // Clear all channels as it is not done in HAL_ADC_ConfigChannel()
mbed_official 469:fc4922e0c183 155 AdcHandle.Instance->CHSELR = 0;
mbed_official 469:fc4922e0c183 156
mbed_official 469:fc4922e0c183 157 HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
mbed_official 469:fc4922e0c183 158
mbed_official 469:fc4922e0c183 159 HAL_ADC_Start(&AdcHandle); // Start conversion
mbed_official 469:fc4922e0c183 160
mbed_official 469:fc4922e0c183 161 // Wait end of conversion and get value
mbed_official 469:fc4922e0c183 162 if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
mbed_official 469:fc4922e0c183 163 return (HAL_ADC_GetValue(&AdcHandle));
mbed_official 469:fc4922e0c183 164 } else {
mbed_official 469:fc4922e0c183 165 return 0;
mbed_official 469:fc4922e0c183 166 }
mbed_official 469:fc4922e0c183 167 }
mbed_official 469:fc4922e0c183 168
mbed_official 630:825f75ca301e 169 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 469:fc4922e0c183 170 uint16_t value = adc_read(obj);
mbed_official 469:fc4922e0c183 171 // 12-bit to 16-bit conversion
mbed_official 469:fc4922e0c183 172 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
mbed_official 469:fc4922e0c183 173 return value;
mbed_official 469:fc4922e0c183 174 }
mbed_official 469:fc4922e0c183 175
mbed_official 630:825f75ca301e 176 float analogin_read(analogin_t *obj) {
mbed_official 469:fc4922e0c183 177 uint16_t value = adc_read(obj);
mbed_official 469:fc4922e0c183 178 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 469:fc4922e0c183 179 }
mbed_official 469:fc4922e0c183 180
mbed_official 469:fc4922e0c183 181 #endif