mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_STM/TARGET_STM32H7/analogin_device.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 189:f392fc9709a3 1 /* mbed Microcontroller Library
AnnaBridge 189:f392fc9709a3 2 * Copyright (c) 2015, STMicroelectronics
AnnaBridge 189:f392fc9709a3 3 * All rights reserved.
AnnaBridge 189:f392fc9709a3 4 *
AnnaBridge 189:f392fc9709a3 5 * Redistribution and use in source and binary forms, with or without
AnnaBridge 189:f392fc9709a3 6 * modification, are permitted provided that the following conditions are met:
AnnaBridge 189:f392fc9709a3 7 *
AnnaBridge 189:f392fc9709a3 8 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 189:f392fc9709a3 9 * this list of conditions and the following disclaimer.
AnnaBridge 189:f392fc9709a3 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 189:f392fc9709a3 11 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 189:f392fc9709a3 12 * and/or other materials provided with the distribution.
AnnaBridge 189:f392fc9709a3 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 189:f392fc9709a3 14 * may be used to endorse or promote products derived from this software
AnnaBridge 189:f392fc9709a3 15 * without specific prior written permission.
AnnaBridge 189:f392fc9709a3 16 *
AnnaBridge 189:f392fc9709a3 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 189:f392fc9709a3 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 189:f392fc9709a3 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 189:f392fc9709a3 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 189:f392fc9709a3 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 189:f392fc9709a3 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 189:f392fc9709a3 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 189:f392fc9709a3 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 189:f392fc9709a3 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 189:f392fc9709a3 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 189:f392fc9709a3 27 */
AnnaBridge 189:f392fc9709a3 28 #include "mbed_assert.h"
AnnaBridge 189:f392fc9709a3 29 #include "analogin_api.h"
AnnaBridge 189:f392fc9709a3 30
AnnaBridge 189:f392fc9709a3 31 #if DEVICE_ANALOGIN
AnnaBridge 189:f392fc9709a3 32
AnnaBridge 189:f392fc9709a3 33 #include "mbed_wait_api.h"
AnnaBridge 189:f392fc9709a3 34 #include "cmsis.h"
AnnaBridge 189:f392fc9709a3 35 #include "pinmap.h"
AnnaBridge 189:f392fc9709a3 36 #include "mbed_error.h"
AnnaBridge 189:f392fc9709a3 37 #include "PeripheralPins.h"
AnnaBridge 189:f392fc9709a3 38
AnnaBridge 189:f392fc9709a3 39 void analogin_init(analogin_t *obj, PinName pin)
AnnaBridge 189:f392fc9709a3 40 {
AnnaBridge 189:f392fc9709a3 41 uint32_t function = (uint32_t)NC;
AnnaBridge 189:f392fc9709a3 42
AnnaBridge 189:f392fc9709a3 43 // ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
AnnaBridge 189:f392fc9709a3 44 // are described in PinNames.h and PeripheralPins.c
AnnaBridge 189:f392fc9709a3 45 // Pin value must be between 0xF0 and 0xFF
AnnaBridge 189:f392fc9709a3 46 if ((pin < 0xF0) || (pin >= 0x100)) {
AnnaBridge 189:f392fc9709a3 47 // Normal channels
AnnaBridge 189:f392fc9709a3 48 // Get the peripheral name from the pin and assign it to the object
AnnaBridge 189:f392fc9709a3 49 obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC);
AnnaBridge 189:f392fc9709a3 50 // Get the functions (adc channel) from the pin and assign it to the object
AnnaBridge 189:f392fc9709a3 51 function = pinmap_function(pin, PinMap_ADC);
AnnaBridge 189:f392fc9709a3 52 // Configure GPIO
AnnaBridge 189:f392fc9709a3 53 pinmap_pinout(pin, PinMap_ADC);
AnnaBridge 189:f392fc9709a3 54 } else {
AnnaBridge 189:f392fc9709a3 55 // Internal channels
AnnaBridge 189:f392fc9709a3 56 obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC_Internal);
AnnaBridge 189:f392fc9709a3 57 function = pinmap_function(pin, PinMap_ADC_Internal);
AnnaBridge 189:f392fc9709a3 58 // No GPIO configuration for internal channels
AnnaBridge 189:f392fc9709a3 59 }
AnnaBridge 189:f392fc9709a3 60 MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
AnnaBridge 189:f392fc9709a3 61 MBED_ASSERT(function != (uint32_t)NC);
AnnaBridge 189:f392fc9709a3 62
AnnaBridge 189:f392fc9709a3 63 obj->channel = STM_PIN_CHANNEL(function);
AnnaBridge 189:f392fc9709a3 64 obj->differential = STM_PIN_INVERTED(function);
AnnaBridge 189:f392fc9709a3 65
AnnaBridge 189:f392fc9709a3 66 // Save pin number for the read function
AnnaBridge 189:f392fc9709a3 67 obj->pin = pin;
AnnaBridge 189:f392fc9709a3 68
AnnaBridge 189:f392fc9709a3 69 // Configure ADC object structures
AnnaBridge 189:f392fc9709a3 70 obj->handle.State = HAL_ADC_STATE_RESET;
AnnaBridge 189:f392fc9709a3 71 obj->handle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
AnnaBridge 189:f392fc9709a3 72 obj->handle.Init.Resolution = ADC_RESOLUTION_16B;
AnnaBridge 189:f392fc9709a3 73 obj->handle.Init.ScanConvMode = DISABLE;
AnnaBridge 189:f392fc9709a3 74 obj->handle.Init.ContinuousConvMode = DISABLE;
AnnaBridge 189:f392fc9709a3 75 obj->handle.Init.DiscontinuousConvMode = DISABLE;
AnnaBridge 189:f392fc9709a3 76 obj->handle.Init.NbrOfDiscConversion = 0;
AnnaBridge 189:f392fc9709a3 77 obj->handle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
AnnaBridge 189:f392fc9709a3 78 obj->handle.Init.ExternalTrigConv = ADC_EXTERNALTRIG_T1_CC1;
AnnaBridge 189:f392fc9709a3 79 obj->handle.Init.LeftBitShift = 0;
AnnaBridge 189:f392fc9709a3 80 obj->handle.Init.NbrOfConversion = 1;
AnnaBridge 189:f392fc9709a3 81 obj->handle.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;
AnnaBridge 189:f392fc9709a3 82 obj->handle.Init.EOCSelection = DISABLE;
AnnaBridge 189:f392fc9709a3 83 obj->handle.Init.LowPowerAutoWait = DISABLE;
AnnaBridge 189:f392fc9709a3 84 obj->handle.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
AnnaBridge 189:f392fc9709a3 85 obj->handle.Init.OversamplingMode = DISABLE;
AnnaBridge 189:f392fc9709a3 86
AnnaBridge 189:f392fc9709a3 87 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
AnnaBridge 189:f392fc9709a3 88 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_ADC;
AnnaBridge 189:f392fc9709a3 89 PeriphClkInitStruct.AdcClockSelection = RCC_ADCCLKSOURCE_CLKP;
AnnaBridge 189:f392fc9709a3 90 PeriphClkInitStruct.PLL2.PLL2P = 4;
AnnaBridge 189:f392fc9709a3 91 HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
AnnaBridge 189:f392fc9709a3 92 __HAL_RCC_ADC_CONFIG(RCC_ADCCLKSOURCE_CLKP);
AnnaBridge 189:f392fc9709a3 93
AnnaBridge 189:f392fc9709a3 94 #if defined(ADC1)
AnnaBridge 189:f392fc9709a3 95 if ((ADCName)obj->handle.Instance == ADC_1) {
AnnaBridge 189:f392fc9709a3 96 __HAL_RCC_ADC12_CLK_ENABLE();
AnnaBridge 189:f392fc9709a3 97 }
AnnaBridge 189:f392fc9709a3 98 #endif
AnnaBridge 189:f392fc9709a3 99 #if defined(ADC2)
AnnaBridge 189:f392fc9709a3 100 if ((ADCName)obj->handle.Instance == ADC_2) {
AnnaBridge 189:f392fc9709a3 101 __HAL_RCC_ADC12_CLK_ENABLE();
AnnaBridge 189:f392fc9709a3 102 }
AnnaBridge 189:f392fc9709a3 103 #endif
AnnaBridge 189:f392fc9709a3 104 #if defined(ADC3)
AnnaBridge 189:f392fc9709a3 105 if ((ADCName)obj->handle.Instance == ADC_3) {
AnnaBridge 189:f392fc9709a3 106 __HAL_RCC_ADC3_CLK_ENABLE();
AnnaBridge 189:f392fc9709a3 107 }
AnnaBridge 189:f392fc9709a3 108 #endif
AnnaBridge 189:f392fc9709a3 109
AnnaBridge 189:f392fc9709a3 110 if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
AnnaBridge 189:f392fc9709a3 111 error("Cannot initialize ADC");
AnnaBridge 189:f392fc9709a3 112 }
AnnaBridge 189:f392fc9709a3 113
AnnaBridge 189:f392fc9709a3 114 // Calibration
AnnaBridge 189:f392fc9709a3 115 if (obj->differential) {
AnnaBridge 189:f392fc9709a3 116 HAL_ADCEx_Calibration_Start(&obj->handle, ADC_CALIB_OFFSET, ADC_DIFFERENTIAL_ENDED);
AnnaBridge 189:f392fc9709a3 117 } else {
AnnaBridge 189:f392fc9709a3 118 HAL_ADCEx_Calibration_Start(&obj->handle, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED);
AnnaBridge 189:f392fc9709a3 119 }
AnnaBridge 189:f392fc9709a3 120 }
AnnaBridge 189:f392fc9709a3 121
AnnaBridge 189:f392fc9709a3 122 uint16_t adc_read(analogin_t *obj)
AnnaBridge 189:f392fc9709a3 123 {
AnnaBridge 189:f392fc9709a3 124 ADC_ChannelConfTypeDef sConfig = {0};
AnnaBridge 189:f392fc9709a3 125
AnnaBridge 189:f392fc9709a3 126 // Configure ADC channel
AnnaBridge 189:f392fc9709a3 127 sConfig.Rank = ADC_REGULAR_RANK_1;
AnnaBridge 189:f392fc9709a3 128 sConfig.SamplingTime = ADC_SAMPLETIME_64CYCLES_5;
AnnaBridge 189:f392fc9709a3 129 sConfig.Offset = 0;
AnnaBridge 189:f392fc9709a3 130 if (obj->differential) {
AnnaBridge 189:f392fc9709a3 131 sConfig.SingleDiff = ADC_DIFFERENTIAL_ENDED;
AnnaBridge 189:f392fc9709a3 132 } else {
AnnaBridge 189:f392fc9709a3 133 sConfig.SingleDiff = ADC_SINGLE_ENDED;
AnnaBridge 189:f392fc9709a3 134 }
AnnaBridge 189:f392fc9709a3 135 sConfig.OffsetNumber = ADC_OFFSET_NONE;
AnnaBridge 189:f392fc9709a3 136 sConfig.OffsetRightShift = DISABLE;
AnnaBridge 189:f392fc9709a3 137 sConfig.OffsetSignedSaturation = DISABLE;
AnnaBridge 189:f392fc9709a3 138
AnnaBridge 189:f392fc9709a3 139 switch (obj->channel) {
AnnaBridge 189:f392fc9709a3 140 case 0:
AnnaBridge 189:f392fc9709a3 141 sConfig.Channel = ADC_CHANNEL_0;
AnnaBridge 189:f392fc9709a3 142 break;
AnnaBridge 189:f392fc9709a3 143 case 1:
AnnaBridge 189:f392fc9709a3 144 sConfig.Channel = ADC_CHANNEL_1;
AnnaBridge 189:f392fc9709a3 145 break;
AnnaBridge 189:f392fc9709a3 146 case 2:
AnnaBridge 189:f392fc9709a3 147 sConfig.Channel = ADC_CHANNEL_2;
AnnaBridge 189:f392fc9709a3 148 break;
AnnaBridge 189:f392fc9709a3 149 case 3:
AnnaBridge 189:f392fc9709a3 150 sConfig.Channel = ADC_CHANNEL_3;
AnnaBridge 189:f392fc9709a3 151 break;
AnnaBridge 189:f392fc9709a3 152 case 4:
AnnaBridge 189:f392fc9709a3 153 sConfig.Channel = ADC_CHANNEL_4;
AnnaBridge 189:f392fc9709a3 154 break;
AnnaBridge 189:f392fc9709a3 155 case 5:
AnnaBridge 189:f392fc9709a3 156 sConfig.Channel = ADC_CHANNEL_5;
AnnaBridge 189:f392fc9709a3 157 break;
AnnaBridge 189:f392fc9709a3 158 case 6:
AnnaBridge 189:f392fc9709a3 159 sConfig.Channel = ADC_CHANNEL_6;
AnnaBridge 189:f392fc9709a3 160 break;
AnnaBridge 189:f392fc9709a3 161 case 7:
AnnaBridge 189:f392fc9709a3 162 sConfig.Channel = ADC_CHANNEL_7;
AnnaBridge 189:f392fc9709a3 163 break;
AnnaBridge 189:f392fc9709a3 164 case 8:
AnnaBridge 189:f392fc9709a3 165 sConfig.Channel = ADC_CHANNEL_8;
AnnaBridge 189:f392fc9709a3 166 break;
AnnaBridge 189:f392fc9709a3 167 case 9:
AnnaBridge 189:f392fc9709a3 168 sConfig.Channel = ADC_CHANNEL_9;
AnnaBridge 189:f392fc9709a3 169 break;
AnnaBridge 189:f392fc9709a3 170 case 10:
AnnaBridge 189:f392fc9709a3 171 sConfig.Channel = ADC_CHANNEL_10;
AnnaBridge 189:f392fc9709a3 172 break;
AnnaBridge 189:f392fc9709a3 173 case 11:
AnnaBridge 189:f392fc9709a3 174 sConfig.Channel = ADC_CHANNEL_11;
AnnaBridge 189:f392fc9709a3 175 break;
AnnaBridge 189:f392fc9709a3 176 case 12:
AnnaBridge 189:f392fc9709a3 177 sConfig.Channel = ADC_CHANNEL_12;
AnnaBridge 189:f392fc9709a3 178 break;
AnnaBridge 189:f392fc9709a3 179 case 13:
AnnaBridge 189:f392fc9709a3 180 sConfig.Channel = ADC_CHANNEL_13;
AnnaBridge 189:f392fc9709a3 181 break;
AnnaBridge 189:f392fc9709a3 182 case 14:
AnnaBridge 189:f392fc9709a3 183 sConfig.Channel = ADC_CHANNEL_14;
AnnaBridge 189:f392fc9709a3 184 break;
AnnaBridge 189:f392fc9709a3 185 case 15:
AnnaBridge 189:f392fc9709a3 186 sConfig.Channel = ADC_CHANNEL_15;
AnnaBridge 189:f392fc9709a3 187 break;
AnnaBridge 189:f392fc9709a3 188 case 16:
AnnaBridge 189:f392fc9709a3 189 sConfig.Channel = ADC_CHANNEL_16;
AnnaBridge 189:f392fc9709a3 190 break;
AnnaBridge 189:f392fc9709a3 191 case 17:
AnnaBridge 189:f392fc9709a3 192 sConfig.Channel = ADC_CHANNEL_17;
AnnaBridge 189:f392fc9709a3 193 break;
AnnaBridge 189:f392fc9709a3 194 case 18:
AnnaBridge 189:f392fc9709a3 195 sConfig.Channel = ADC_CHANNEL_18;
AnnaBridge 189:f392fc9709a3 196 break;
AnnaBridge 189:f392fc9709a3 197 case 19:
AnnaBridge 189:f392fc9709a3 198 sConfig.Channel = ADC_CHANNEL_19;
AnnaBridge 189:f392fc9709a3 199 break;
AnnaBridge 189:f392fc9709a3 200 default:
AnnaBridge 189:f392fc9709a3 201 return 0;
AnnaBridge 189:f392fc9709a3 202 }
AnnaBridge 189:f392fc9709a3 203
AnnaBridge 189:f392fc9709a3 204 HAL_ADC_ConfigChannel(&obj->handle, &sConfig);
AnnaBridge 189:f392fc9709a3 205
AnnaBridge 189:f392fc9709a3 206 HAL_ADC_Start(&obj->handle); // Start conversion
AnnaBridge 189:f392fc9709a3 207
AnnaBridge 189:f392fc9709a3 208 // Wait end of conversion and get value
AnnaBridge 189:f392fc9709a3 209 if (HAL_ADC_PollForConversion(&obj->handle, 10) == HAL_OK) {
AnnaBridge 189:f392fc9709a3 210 return (uint16_t)HAL_ADC_GetValue(&obj->handle);
AnnaBridge 189:f392fc9709a3 211 } else {
AnnaBridge 189:f392fc9709a3 212 return 0;
AnnaBridge 189:f392fc9709a3 213 }
AnnaBridge 189:f392fc9709a3 214 }
AnnaBridge 189:f392fc9709a3 215
AnnaBridge 189:f392fc9709a3 216 #endif