Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32F7/analogin_api.c@153:9398a535854b, 2016-12-22 (annotated)

Committer:
fwndz
Date:
Thu Dec 22 05:12:40 2016 +0000
Revision:
153:9398a535854b
Parent:
150:02e0a0aed4ec 
device target maximize

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2015, STMicroelectronics
<> 149:156823d33999 3 * All rights reserved.
<> 149:156823d33999 4 *
<> 149:156823d33999 5 * Redistribution and use in source and binary forms, with or without
<> 149:156823d33999 6 * modification, are permitted provided that the following conditions are met:
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * 1. Redistributions of source code must retain the above copyright notice,
<> 149:156823d33999 9 * this list of conditions and the following disclaimer.
<> 149:156823d33999 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 149:156823d33999 11 * this list of conditions and the following disclaimer in the documentation
<> 149:156823d33999 12 * and/or other materials provided with the distribution.
<> 149:156823d33999 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 149:156823d33999 14 * may be used to endorse or promote products derived from this software
<> 149:156823d33999 15 * without specific prior written permission.
<> 149:156823d33999 16 *
<> 149:156823d33999 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 149:156823d33999 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 149:156823d33999 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 149:156823d33999 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 149:156823d33999 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 149:156823d33999 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 149:156823d33999 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 149:156823d33999 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 149:156823d33999 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 149:156823d33999 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 149:156823d33999 27 */
<> 149:156823d33999 28 #include "mbed_assert.h"
<> 149:156823d33999 29 #include "analogin_api.h"
<> 149:156823d33999 30
<> 149:156823d33999 31 #if DEVICE_ANALOGIN
<> 149:156823d33999 32
<> 149:156823d33999 33 #include "wait_api.h"
<> 149:156823d33999 34 #include "cmsis.h"
<> 149:156823d33999 35 #include "pinmap.h"
<> 149:156823d33999 36 #include "PeripheralPins.h"
<> 149:156823d33999 37 #include "mbed_error.h"
<> 149:156823d33999 38
<> 149:156823d33999 39 ADC_HandleTypeDef AdcHandle;
<> 149:156823d33999 40
<> 149:156823d33999 41 void analogin_init(analogin_t *obj, PinName pin)
<> 149:156823d33999 42 {
<> 149:156823d33999 43 #if defined(ADC1)
<> 149:156823d33999 44 static int adc1_inited = 0;
<> 149:156823d33999 45 #endif
<> 149:156823d33999 46 #if defined(ADC2)
<> 149:156823d33999 47 static int adc2_inited = 0;
<> 149:156823d33999 48 #endif
<> 149:156823d33999 49 #if defined(ADC3)
<> 149:156823d33999 50 static int adc3_inited = 0;
<> 149:156823d33999 51 #endif
<> 149:156823d33999 52
<> 149:156823d33999 53 // Get the peripheral name from the pin and assign it to the object
<> 149:156823d33999 54 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
<> 149:156823d33999 55 MBED_ASSERT(obj->adc != (ADCName)NC);
<> 149:156823d33999 56
<> 149:156823d33999 57 // Get the functions (adc channel) from the pin and assign it to the object
<> 149:156823d33999 58 uint32_t function = pinmap_function(pin, PinMap_ADC);
<> 149:156823d33999 59 MBED_ASSERT(function != (uint32_t)NC);
<> 149:156823d33999 60 obj->channel = STM_PIN_CHANNEL(function);
<> 149:156823d33999 61
<> 150:02e0a0aed4ec 62 // Configure GPIO excepted for internal channels (Temperature, Vref, Vbat, ...)
<> 150:02e0a0aed4ec 63 // ADC Internal Channels "pins" are described in PinNames.h and must have a value >= 0xF0
<> 150:02e0a0aed4ec 64 if (pin < 0xF0) {
<> 149:156823d33999 65 pinmap_pinout(pin, PinMap_ADC);
<> 149:156823d33999 66 }
<> 149:156823d33999 67
<> 149:156823d33999 68 // Save pin number for the read function
<> 149:156823d33999 69 obj->pin = pin;
<> 149:156823d33999 70
<> 149:156823d33999 71 // Check if ADC is already initialized
<> 149:156823d33999 72 // Enable ADC clock
<> 149:156823d33999 73 #if defined(ADC1)
<> 149:156823d33999 74 if ((obj->adc == ADC_1) && adc1_inited) return;
<> 149:156823d33999 75 if (obj->adc == ADC_1) {
<> 149:156823d33999 76 __HAL_RCC_ADC1_CLK_ENABLE();
<> 149:156823d33999 77 adc1_inited = 1;
<> 149:156823d33999 78 }
<> 149:156823d33999 79 #endif
<> 149:156823d33999 80 #if defined(ADC2)
<> 149:156823d33999 81 if ((obj->adc == ADC_2) && adc2_inited) return;
<> 149:156823d33999 82 if (obj->adc == ADC_2) {
<> 149:156823d33999 83 __HAL_RCC_ADC2_CLK_ENABLE();
<> 149:156823d33999 84 adc2_inited = 1;
<> 149:156823d33999 85 }
<> 149:156823d33999 86 #endif
<> 149:156823d33999 87 #if defined(ADC3)
<> 149:156823d33999 88 if ((obj->adc == ADC_3) && adc3_inited) return;
<> 149:156823d33999 89 if (obj->adc == ADC_3) {
<> 149:156823d33999 90 __HAL_RCC_ADC3_CLK_ENABLE();
<> 149:156823d33999 91 adc3_inited = 1;
<> 149:156823d33999 92 }
<> 149:156823d33999 93 #endif
<> 149:156823d33999 94
<> 149:156823d33999 95 // Configure ADC
<> 149:156823d33999 96 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
<> 149:156823d33999 97 AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV4;
<> 149:156823d33999 98 AdcHandle.Init.Resolution = ADC_RESOLUTION_12B;
<> 149:156823d33999 99 AdcHandle.Init.ScanConvMode = DISABLE;
<> 149:156823d33999 100 AdcHandle.Init.ContinuousConvMode = DISABLE;
<> 149:156823d33999 101 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
<> 149:156823d33999 102 AdcHandle.Init.NbrOfDiscConversion = 0;
<> 149:156823d33999 103 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
<> 149:156823d33999 104 AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
<> 149:156823d33999 105 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
<> 149:156823d33999 106 AdcHandle.Init.NbrOfConversion = 1;
<> 149:156823d33999 107 AdcHandle.Init.DMAContinuousRequests = DISABLE;
<> 149:156823d33999 108 AdcHandle.Init.EOCSelection = DISABLE;
<> 149:156823d33999 109
<> 149:156823d33999 110 if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
<> 149:156823d33999 111 error("Cannot initialize ADC");
<> 149:156823d33999 112 }
<> 149:156823d33999 113 }
<> 149:156823d33999 114
<> 149:156823d33999 115 static inline uint16_t adc_read(analogin_t *obj)
<> 149:156823d33999 116 {
<> 149:156823d33999 117 ADC_ChannelConfTypeDef sConfig = {0};
<> 149:156823d33999 118
<> 149:156823d33999 119 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
<> 149:156823d33999 120
<> 149:156823d33999 121 // Configure ADC channel
<> 149:156823d33999 122 sConfig.Rank = 1;
<> 149:156823d33999 123 sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
<> 149:156823d33999 124 sConfig.Offset = 0;
<> 149:156823d33999 125
<> 149:156823d33999 126 switch (obj->channel) {
<> 149:156823d33999 127 case 0:
<> 149:156823d33999 128 sConfig.Channel = ADC_CHANNEL_0;
<> 149:156823d33999 129 break;
<> 149:156823d33999 130 case 1:
<> 149:156823d33999 131 sConfig.Channel = ADC_CHANNEL_1;
<> 149:156823d33999 132 break;
<> 149:156823d33999 133 case 2:
<> 149:156823d33999 134 sConfig.Channel = ADC_CHANNEL_2;
<> 149:156823d33999 135 break;
<> 149:156823d33999 136 case 3:
<> 149:156823d33999 137 sConfig.Channel = ADC_CHANNEL_3;
<> 149:156823d33999 138 break;
<> 149:156823d33999 139 case 4:
<> 149:156823d33999 140 sConfig.Channel = ADC_CHANNEL_4;
<> 149:156823d33999 141 break;
<> 149:156823d33999 142 case 5:
<> 149:156823d33999 143 sConfig.Channel = ADC_CHANNEL_5;
<> 149:156823d33999 144 break;
<> 149:156823d33999 145 case 6:
<> 149:156823d33999 146 sConfig.Channel = ADC_CHANNEL_6;
<> 149:156823d33999 147 break;
<> 149:156823d33999 148 case 7:
<> 149:156823d33999 149 sConfig.Channel = ADC_CHANNEL_7;
<> 149:156823d33999 150 break;
<> 149:156823d33999 151 case 8:
<> 149:156823d33999 152 sConfig.Channel = ADC_CHANNEL_8;
<> 149:156823d33999 153 break;
<> 149:156823d33999 154 case 9:
<> 149:156823d33999 155 sConfig.Channel = ADC_CHANNEL_9;
<> 149:156823d33999 156 break;
<> 149:156823d33999 157 case 10:
<> 149:156823d33999 158 sConfig.Channel = ADC_CHANNEL_10;
<> 149:156823d33999 159 break;
<> 149:156823d33999 160 case 11:
<> 149:156823d33999 161 sConfig.Channel = ADC_CHANNEL_11;
<> 149:156823d33999 162 break;
<> 149:156823d33999 163 case 12:
<> 149:156823d33999 164 sConfig.Channel = ADC_CHANNEL_12;
<> 149:156823d33999 165 break;
<> 149:156823d33999 166 case 13:
<> 149:156823d33999 167 sConfig.Channel = ADC_CHANNEL_13;
<> 149:156823d33999 168 break;
<> 149:156823d33999 169 case 14:
<> 149:156823d33999 170 sConfig.Channel = ADC_CHANNEL_14;
<> 149:156823d33999 171 break;
<> 149:156823d33999 172 case 15:
<> 149:156823d33999 173 sConfig.Channel = ADC_CHANNEL_15;
<> 149:156823d33999 174 break;
<> 149:156823d33999 175 case 16:
<> 149:156823d33999 176 sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
<> 149:156823d33999 177 break;
<> 149:156823d33999 178 case 17:
<> 149:156823d33999 179 sConfig.Channel = ADC_CHANNEL_VREFINT;
<> 149:156823d33999 180 break;
<> 149:156823d33999 181 case 18:
<> 149:156823d33999 182 sConfig.Channel = ADC_CHANNEL_VBAT;
<> 149:156823d33999 183 break;
<> 149:156823d33999 184 default:
<> 149:156823d33999 185 return 0;
<> 149:156823d33999 186 }
<> 149:156823d33999 187
<> 149:156823d33999 188 if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK) {
<> 149:156823d33999 189 error("Cannot configure ADC channel");
<> 149:156823d33999 190 }
<> 149:156823d33999 191
<> 149:156823d33999 192 HAL_ADC_Start(&AdcHandle); // Start conversion
<> 149:156823d33999 193
<> 149:156823d33999 194 // Wait end of conversion and get value
<> 149:156823d33999 195 HAL_ADC_PollForConversion(&AdcHandle, 10);
<> 149:156823d33999 196 if (HAL_ADC_GetState(&AdcHandle) & HAL_ADC_STATE_EOC_REG) {
<> 149:156823d33999 197 return (HAL_ADC_GetValue(&AdcHandle));
<> 149:156823d33999 198 } else {
<> 149:156823d33999 199 return 0;
<> 149:156823d33999 200 }
<> 149:156823d33999 201 }
<> 149:156823d33999 202
<> 149:156823d33999 203 uint16_t analogin_read_u16(analogin_t *obj)
<> 149:156823d33999 204 {
<> 149:156823d33999 205 uint16_t value = adc_read(obj);
<> 149:156823d33999 206 // 12-bit to 16-bit conversion
<> 149:156823d33999 207 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
<> 149:156823d33999 208 return value;
<> 149:156823d33999 209 }
<> 149:156823d33999 210
<> 149:156823d33999 211 float analogin_read(analogin_t *obj)
<> 149:156823d33999 212 {
<> 149:156823d33999 213 uint16_t value = adc_read(obj);
<> 149:156823d33999 214 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
<> 149:156823d33999 215 }
<> 149:156823d33999 216
<> 149:156823d33999 217 #endif