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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_STM32F3/analogin_api.c@621:9c82b0f79f3d, 2015-09-11 (annotated)

Committer:
mbed_official
Date:
Fri Sep 11 09:30:09 2015 +0100
Revision:
621:9c82b0f79f3d
Parent:
544:1af5f1c39e80 
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538



Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/



ignore target files not supported by the yotta module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 544:1af5f1c39e80 1 /* mbed Microcontroller Library
mbed_official 544:1af5f1c39e80 2 * Copyright (c) 2015, STMicroelectronics
mbed_official 544:1af5f1c39e80 3 * All rights reserved.
mbed_official 544:1af5f1c39e80 4 *
mbed_official 544:1af5f1c39e80 5 * Redistribution and use in source and binary forms, with or without
mbed_official 544:1af5f1c39e80 6 * modification, are permitted provided that the following conditions are met:
mbed_official 544:1af5f1c39e80 7 *
mbed_official 544:1af5f1c39e80 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 544:1af5f1c39e80 9 * this list of conditions and the following disclaimer.
mbed_official 544:1af5f1c39e80 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 544:1af5f1c39e80 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 544:1af5f1c39e80 12 * and/or other materials provided with the distribution.
mbed_official 544:1af5f1c39e80 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 544:1af5f1c39e80 14 * may be used to endorse or promote products derived from this software
mbed_official 544:1af5f1c39e80 15 * without specific prior written permission.
mbed_official 544:1af5f1c39e80 16 *
mbed_official 544:1af5f1c39e80 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 544:1af5f1c39e80 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 544:1af5f1c39e80 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 544:1af5f1c39e80 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 544:1af5f1c39e80 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 544:1af5f1c39e80 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 544:1af5f1c39e80 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 544:1af5f1c39e80 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 544:1af5f1c39e80 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 544:1af5f1c39e80 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 544:1af5f1c39e80 27 */
mbed_official 544:1af5f1c39e80 28 #include "mbed_assert.h"
mbed_official 544:1af5f1c39e80 29 #include "analogin_api.h"
mbed_official 544:1af5f1c39e80 30
mbed_official 544:1af5f1c39e80 31 #if DEVICE_ANALOGIN
mbed_official 544:1af5f1c39e80 32
mbed_official 544:1af5f1c39e80 33 #include "wait_api.h"
mbed_official 544:1af5f1c39e80 34 #include "cmsis.h"
mbed_official 544:1af5f1c39e80 35 #include "pinmap.h"
mbed_official 544:1af5f1c39e80 36 #include "mbed_error.h"
mbed_official 544:1af5f1c39e80 37 #include "PeripheralPins.h"
mbed_official 544:1af5f1c39e80 38
mbed_official 544:1af5f1c39e80 39 ADC_HandleTypeDef AdcHandle;
mbed_official 544:1af5f1c39e80 40
mbed_official 544:1af5f1c39e80 41 void analogin_init(analogin_t *obj, PinName pin)
mbed_official 544:1af5f1c39e80 42 {
mbed_official 544:1af5f1c39e80 43 #if defined(ADC1)
mbed_official 544:1af5f1c39e80 44 static int adc1_inited = 0;
mbed_official 544:1af5f1c39e80 45 #endif
mbed_official 544:1af5f1c39e80 46 #if defined(ADC2)
mbed_official 544:1af5f1c39e80 47 static int adc2_inited = 0;
mbed_official 544:1af5f1c39e80 48 #endif
mbed_official 544:1af5f1c39e80 49 #if defined(ADC3)
mbed_official 544:1af5f1c39e80 50 static int adc3_inited = 0;
mbed_official 544:1af5f1c39e80 51 #endif
mbed_official 544:1af5f1c39e80 52 #if defined(ADC4)
mbed_official 544:1af5f1c39e80 53 static int adc4_inited = 0;
mbed_official 544:1af5f1c39e80 54 #endif
mbed_official 544:1af5f1c39e80 55
mbed_official 544:1af5f1c39e80 56 // Get the peripheral name from the pin and assign it to the object
mbed_official 544:1af5f1c39e80 57 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 544:1af5f1c39e80 58 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 544:1af5f1c39e80 59
mbed_official 544:1af5f1c39e80 60 // Get the pin function and assign the used channel to the object
mbed_official 544:1af5f1c39e80 61 uint32_t function = pinmap_function(pin, PinMap_ADC);
mbed_official 544:1af5f1c39e80 62 MBED_ASSERT(function != (uint32_t)NC);
mbed_official 544:1af5f1c39e80 63 obj->channel = STM_PIN_CHANNEL(function);
mbed_official 544:1af5f1c39e80 64
mbed_official 544:1af5f1c39e80 65 // Configure GPIO
mbed_official 544:1af5f1c39e80 66 pinmap_pinout(pin, PinMap_ADC);
mbed_official 544:1af5f1c39e80 67
mbed_official 544:1af5f1c39e80 68 // Save pin number for the read function
mbed_official 544:1af5f1c39e80 69 obj->pin = pin;
mbed_official 544:1af5f1c39e80 70
mbed_official 544:1af5f1c39e80 71 // Check if ADC is already initialized
mbed_official 544:1af5f1c39e80 72 // Enable ADC clock
mbed_official 544:1af5f1c39e80 73 #if defined(ADC1)
mbed_official 544:1af5f1c39e80 74 if ((obj->adc == ADC_1) && adc1_inited) return;
mbed_official 544:1af5f1c39e80 75 if (obj->adc == ADC_1) {
mbed_official 544:1af5f1c39e80 76 __ADC1_CLK_ENABLE();
mbed_official 544:1af5f1c39e80 77 adc1_inited = 1;
mbed_official 544:1af5f1c39e80 78 }
mbed_official 544:1af5f1c39e80 79 #endif
mbed_official 544:1af5f1c39e80 80 #if defined(ADC2)
mbed_official 544:1af5f1c39e80 81 if ((obj->adc == ADC_2) && adc2_inited) return;
mbed_official 544:1af5f1c39e80 82 if (obj->adc == ADC_2) {
mbed_official 544:1af5f1c39e80 83 __ADC2_CLK_ENABLE();
mbed_official 544:1af5f1c39e80 84 adc2_inited = 1;
mbed_official 544:1af5f1c39e80 85 }
mbed_official 544:1af5f1c39e80 86 #endif
mbed_official 544:1af5f1c39e80 87 #if defined(ADC3)
mbed_official 544:1af5f1c39e80 88 if ((obj->adc == ADC_3) && adc3_inited) return;
mbed_official 544:1af5f1c39e80 89 if (obj->adc == ADC_3) {
mbed_official 544:1af5f1c39e80 90 __ADC34_CLK_ENABLE();
mbed_official 544:1af5f1c39e80 91 adc3_inited = 1;
mbed_official 544:1af5f1c39e80 92 }
mbed_official 544:1af5f1c39e80 93 #endif
mbed_official 544:1af5f1c39e80 94 #if defined(ADC4)
mbed_official 544:1af5f1c39e80 95 if ((obj->adc == ADC_4) && adc4_inited) return;
mbed_official 544:1af5f1c39e80 96 if (obj->adc == ADC_4) {
mbed_official 544:1af5f1c39e80 97 __ADC34_CLK_ENABLE();
mbed_official 544:1af5f1c39e80 98 adc4_inited = 1;
mbed_official 544:1af5f1c39e80 99 }
mbed_official 544:1af5f1c39e80 100 #endif
mbed_official 544:1af5f1c39e80 101
mbed_official 544:1af5f1c39e80 102 // Configure ADC
mbed_official 544:1af5f1c39e80 103 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 544:1af5f1c39e80 104 AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
mbed_official 544:1af5f1c39e80 105 AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
mbed_official 544:1af5f1c39e80 106 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
mbed_official 544:1af5f1c39e80 107 AdcHandle.Init.ScanConvMode = DISABLE;
mbed_official 544:1af5f1c39e80 108 AdcHandle.Init.EOCSelection = EOC_SINGLE_CONV;
mbed_official 544:1af5f1c39e80 109 AdcHandle.Init.LowPowerAutoWait = DISABLE;
mbed_official 544:1af5f1c39e80 110 AdcHandle.Init.ContinuousConvMode = DISABLE;
mbed_official 544:1af5f1c39e80 111 AdcHandle.Init.NbrOfConversion = 1;
mbed_official 544:1af5f1c39e80 112 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
mbed_official 544:1af5f1c39e80 113 AdcHandle.Init.NbrOfDiscConversion = 0;
mbed_official 544:1af5f1c39e80 114 AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
mbed_official 544:1af5f1c39e80 115 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
mbed_official 544:1af5f1c39e80 116 AdcHandle.Init.DMAContinuousRequests = DISABLE;
mbed_official 544:1af5f1c39e80 117 AdcHandle.Init.Overrun = OVR_DATA_OVERWRITTEN;
mbed_official 544:1af5f1c39e80 118
mbed_official 544:1af5f1c39e80 119 if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
mbed_official 544:1af5f1c39e80 120 error("Cannot initialize ADC");
mbed_official 544:1af5f1c39e80 121 }
mbed_official 544:1af5f1c39e80 122 }
mbed_official 544:1af5f1c39e80 123
mbed_official 544:1af5f1c39e80 124 static inline uint16_t adc_read(analogin_t *obj)
mbed_official 544:1af5f1c39e80 125 {
mbed_official 544:1af5f1c39e80 126 ADC_ChannelConfTypeDef sConfig = {0};
mbed_official 544:1af5f1c39e80 127
mbed_official 544:1af5f1c39e80 128 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 544:1af5f1c39e80 129
mbed_official 544:1af5f1c39e80 130 // Configure ADC channel
mbed_official 544:1af5f1c39e80 131 sConfig.Rank = ADC_REGULAR_RANK_1;
mbed_official 544:1af5f1c39e80 132 sConfig.SamplingTime = ADC_SAMPLETIME_19CYCLES_5;
mbed_official 544:1af5f1c39e80 133 sConfig.SingleDiff = ADC_SINGLE_ENDED;
mbed_official 544:1af5f1c39e80 134 sConfig.OffsetNumber = ADC_OFFSET_NONE;
mbed_official 544:1af5f1c39e80 135 sConfig.Offset = 0;
mbed_official 544:1af5f1c39e80 136
mbed_official 544:1af5f1c39e80 137 switch (obj->channel) {
mbed_official 544:1af5f1c39e80 138 case 1:
mbed_official 544:1af5f1c39e80 139 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 544:1af5f1c39e80 140 break;
mbed_official 544:1af5f1c39e80 141 case 2:
mbed_official 544:1af5f1c39e80 142 sConfig.Channel = ADC_CHANNEL_2;
mbed_official 544:1af5f1c39e80 143 break;
mbed_official 544:1af5f1c39e80 144 case 3:
mbed_official 544:1af5f1c39e80 145 sConfig.Channel = ADC_CHANNEL_3;
mbed_official 544:1af5f1c39e80 146 break;
mbed_official 544:1af5f1c39e80 147 case 4:
mbed_official 544:1af5f1c39e80 148 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 544:1af5f1c39e80 149 break;
mbed_official 544:1af5f1c39e80 150 case 5:
mbed_official 544:1af5f1c39e80 151 sConfig.Channel = ADC_CHANNEL_5;
mbed_official 544:1af5f1c39e80 152 break;
mbed_official 544:1af5f1c39e80 153 case 6:
mbed_official 544:1af5f1c39e80 154 sConfig.Channel = ADC_CHANNEL_6;
mbed_official 544:1af5f1c39e80 155 break;
mbed_official 544:1af5f1c39e80 156 case 7:
mbed_official 544:1af5f1c39e80 157 sConfig.Channel = ADC_CHANNEL_7;
mbed_official 544:1af5f1c39e80 158 break;
mbed_official 544:1af5f1c39e80 159 case 8:
mbed_official 544:1af5f1c39e80 160 sConfig.Channel = ADC_CHANNEL_8;
mbed_official 544:1af5f1c39e80 161 break;
mbed_official 544:1af5f1c39e80 162 case 9:
mbed_official 544:1af5f1c39e80 163 sConfig.Channel = ADC_CHANNEL_9;
mbed_official 544:1af5f1c39e80 164 break;
mbed_official 544:1af5f1c39e80 165 case 10:
mbed_official 544:1af5f1c39e80 166 sConfig.Channel = ADC_CHANNEL_10;
mbed_official 544:1af5f1c39e80 167 break;
mbed_official 544:1af5f1c39e80 168 case 11:
mbed_official 544:1af5f1c39e80 169 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 544:1af5f1c39e80 170 break;
mbed_official 544:1af5f1c39e80 171 case 12:
mbed_official 544:1af5f1c39e80 172 sConfig.Channel = ADC_CHANNEL_12;
mbed_official 544:1af5f1c39e80 173 break;
mbed_official 544:1af5f1c39e80 174 case 13:
mbed_official 544:1af5f1c39e80 175 sConfig.Channel = ADC_CHANNEL_13;
mbed_official 544:1af5f1c39e80 176 break;
mbed_official 544:1af5f1c39e80 177 case 14:
mbed_official 544:1af5f1c39e80 178 sConfig.Channel = ADC_CHANNEL_14;
mbed_official 544:1af5f1c39e80 179 break;
mbed_official 544:1af5f1c39e80 180 case 15:
mbed_official 544:1af5f1c39e80 181 sConfig.Channel = ADC_CHANNEL_15;
mbed_official 544:1af5f1c39e80 182 break;
mbed_official 544:1af5f1c39e80 183 case 16:
mbed_official 544:1af5f1c39e80 184 sConfig.Channel = ADC_CHANNEL_16;
mbed_official 544:1af5f1c39e80 185 break;
mbed_official 544:1af5f1c39e80 186 case 17:
mbed_official 544:1af5f1c39e80 187 sConfig.Channel = ADC_CHANNEL_17;
mbed_official 544:1af5f1c39e80 188 break;
mbed_official 544:1af5f1c39e80 189 case 18:
mbed_official 544:1af5f1c39e80 190 sConfig.Channel = ADC_CHANNEL_18;
mbed_official 544:1af5f1c39e80 191 break;
mbed_official 544:1af5f1c39e80 192 default:
mbed_official 544:1af5f1c39e80 193 return 0;
mbed_official 544:1af5f1c39e80 194 }
mbed_official 544:1af5f1c39e80 195
mbed_official 544:1af5f1c39e80 196 HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
mbed_official 544:1af5f1c39e80 197
mbed_official 544:1af5f1c39e80 198 HAL_ADC_Start(&AdcHandle); // Start conversion
mbed_official 544:1af5f1c39e80 199
mbed_official 544:1af5f1c39e80 200 // Wait end of conversion and get value
mbed_official 544:1af5f1c39e80 201 if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
mbed_official 544:1af5f1c39e80 202 return (HAL_ADC_GetValue(&AdcHandle));
mbed_official 544:1af5f1c39e80 203 } else {
mbed_official 544:1af5f1c39e80 204 return 0;
mbed_official 544:1af5f1c39e80 205 }
mbed_official 544:1af5f1c39e80 206 }
mbed_official 544:1af5f1c39e80 207
mbed_official 544:1af5f1c39e80 208 uint16_t analogin_read_u16(analogin_t *obj)
mbed_official 544:1af5f1c39e80 209 {
mbed_official 544:1af5f1c39e80 210 uint16_t value = adc_read(obj);
mbed_official 544:1af5f1c39e80 211 // 12-bit to 16-bit conversion
mbed_official 544:1af5f1c39e80 212 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
mbed_official 544:1af5f1c39e80 213 return value;
mbed_official 544:1af5f1c39e80 214 }
mbed_official 544:1af5f1c39e80 215
mbed_official 544:1af5f1c39e80 216 float analogin_read(analogin_t *obj)
mbed_official 544:1af5f1c39e80 217 {
mbed_official 544:1af5f1c39e80 218 uint16_t value = adc_read(obj);
mbed_official 544:1af5f1c39e80 219 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 544:1af5f1c39e80 220 }
mbed_official 544:1af5f1c39e80 221
mbed_official 544:1af5f1c39e80 222 #endif