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mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F7/analogin_api.c@582:a89625bcd809, 2015-07-06 (annotated)

Committer:
mbed_official
Date:
Mon Jul 06 09:00:34 2015 +0100
Revision:
582:a89625bcd809
Parent:
573:ad23fe03a082 
Synchronized with git revision 45004fb61e4af8f74f4e916318df5207fcf6076d



Full URL: https://github.com/mbedmicro/mbed/commit/45004fb61e4af8f74f4e916318df5207fcf6076d/



DISCO_F746NG - Fix several issues

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 573:ad23fe03a082 1 /* mbed Microcontroller Library
mbed_official 573:ad23fe03a082 2 * Copyright (c) 2015, STMicroelectronics
mbed_official 573:ad23fe03a082 3 * All rights reserved.
mbed_official 573:ad23fe03a082 4 *
mbed_official 573:ad23fe03a082 5 * Redistribution and use in source and binary forms, with or without
mbed_official 573:ad23fe03a082 6 * modification, are permitted provided that the following conditions are met:
mbed_official 573:ad23fe03a082 7 *
mbed_official 573:ad23fe03a082 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 573:ad23fe03a082 9 * this list of conditions and the following disclaimer.
mbed_official 573:ad23fe03a082 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 573:ad23fe03a082 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 573:ad23fe03a082 12 * and/or other materials provided with the distribution.
mbed_official 573:ad23fe03a082 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 573:ad23fe03a082 14 * may be used to endorse or promote products derived from this software
mbed_official 573:ad23fe03a082 15 * without specific prior written permission.
mbed_official 573:ad23fe03a082 16 *
mbed_official 573:ad23fe03a082 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 573:ad23fe03a082 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 573:ad23fe03a082 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 573:ad23fe03a082 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 573:ad23fe03a082 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 573:ad23fe03a082 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 573:ad23fe03a082 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 573:ad23fe03a082 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 573:ad23fe03a082 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 573:ad23fe03a082 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 573:ad23fe03a082 27 */
mbed_official 573:ad23fe03a082 28 #include "mbed_assert.h"
mbed_official 573:ad23fe03a082 29 #include "analogin_api.h"
mbed_official 573:ad23fe03a082 30
mbed_official 573:ad23fe03a082 31 #if DEVICE_ANALOGIN
mbed_official 573:ad23fe03a082 32
mbed_official 573:ad23fe03a082 33 #include "wait_api.h"
mbed_official 573:ad23fe03a082 34 #include "cmsis.h"
mbed_official 573:ad23fe03a082 35 #include "pinmap.h"
mbed_official 573:ad23fe03a082 36 #include "PeripheralPins.h"
mbed_official 582:a89625bcd809 37 #include "mbed_error.h"
mbed_official 573:ad23fe03a082 38
mbed_official 573:ad23fe03a082 39 ADC_HandleTypeDef AdcHandle;
mbed_official 573:ad23fe03a082 40
mbed_official 573:ad23fe03a082 41 void analogin_init(analogin_t *obj, PinName pin)
mbed_official 573:ad23fe03a082 42 {
mbed_official 582:a89625bcd809 43 #if defined(ADC1)
mbed_official 582:a89625bcd809 44 static int adc1_inited = 0;
mbed_official 582:a89625bcd809 45 #endif
mbed_official 582:a89625bcd809 46 #if defined(ADC2)
mbed_official 582:a89625bcd809 47 static int adc2_inited = 0;
mbed_official 582:a89625bcd809 48 #endif
mbed_official 582:a89625bcd809 49 #if defined(ADC3)
mbed_official 582:a89625bcd809 50 static int adc3_inited = 0;
mbed_official 582:a89625bcd809 51 #endif
mbed_official 582:a89625bcd809 52
mbed_official 573:ad23fe03a082 53 // Get the peripheral name from the pin and assign it to the object
mbed_official 573:ad23fe03a082 54 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 573:ad23fe03a082 55 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 573:ad23fe03a082 56
mbed_official 573:ad23fe03a082 57 // Get the functions (adc channel) from the pin and assign it to the object
mbed_official 573:ad23fe03a082 58 uint32_t function = pinmap_function(pin, PinMap_ADC);
mbed_official 573:ad23fe03a082 59 MBED_ASSERT(function != (uint32_t)NC);
mbed_official 573:ad23fe03a082 60 obj->channel = STM_PIN_CHANNEL(function);
mbed_official 573:ad23fe03a082 61
mbed_official 573:ad23fe03a082 62 // Configure GPIO
mbed_official 573:ad23fe03a082 63 pinmap_pinout(pin, PinMap_ADC);
mbed_official 573:ad23fe03a082 64
mbed_official 573:ad23fe03a082 65 // Save pin number for the read function
mbed_official 573:ad23fe03a082 66 obj->pin = pin;
mbed_official 573:ad23fe03a082 67
mbed_official 582:a89625bcd809 68 // Check if ADC is already initialized
mbed_official 582:a89625bcd809 69 // Enable ADC clock
mbed_official 582:a89625bcd809 70 #if defined(ADC1)
mbed_official 582:a89625bcd809 71 if ((obj->adc == ADC_1) && adc1_inited) return;
mbed_official 582:a89625bcd809 72 if (obj->adc == ADC_1) {
mbed_official 582:a89625bcd809 73 __HAL_RCC_ADC1_CLK_ENABLE();
mbed_official 582:a89625bcd809 74 adc1_inited = 1;
mbed_official 582:a89625bcd809 75 }
mbed_official 582:a89625bcd809 76 #endif
mbed_official 582:a89625bcd809 77 #if defined(ADC2)
mbed_official 582:a89625bcd809 78 if ((obj->adc == ADC_2) && adc2_inited) return;
mbed_official 582:a89625bcd809 79 if (obj->adc == ADC_2) {
mbed_official 582:a89625bcd809 80 __HAL_RCC_ADC2_CLK_ENABLE();
mbed_official 582:a89625bcd809 81 adc2_inited = 1;
mbed_official 582:a89625bcd809 82 }
mbed_official 582:a89625bcd809 83 #endif
mbed_official 582:a89625bcd809 84 #if defined(ADC3)
mbed_official 582:a89625bcd809 85 if ((obj->adc == ADC_3) && adc3_inited) return;
mbed_official 582:a89625bcd809 86 if (obj->adc == ADC_3) {
mbed_official 582:a89625bcd809 87 __HAL_RCC_ADC3_CLK_ENABLE();
mbed_official 582:a89625bcd809 88 adc3_inited = 1;
mbed_official 582:a89625bcd809 89 }
mbed_official 582:a89625bcd809 90 #endif
mbed_official 573:ad23fe03a082 91
mbed_official 582:a89625bcd809 92 // Configure ADC
mbed_official 582:a89625bcd809 93 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 582:a89625bcd809 94 AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV4;
mbed_official 582:a89625bcd809 95 AdcHandle.Init.Resolution = ADC_RESOLUTION_12B;
mbed_official 582:a89625bcd809 96 AdcHandle.Init.ScanConvMode = DISABLE;
mbed_official 582:a89625bcd809 97 AdcHandle.Init.ContinuousConvMode = DISABLE;
mbed_official 582:a89625bcd809 98 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
mbed_official 582:a89625bcd809 99 AdcHandle.Init.NbrOfDiscConversion = 0;
mbed_official 582:a89625bcd809 100 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
mbed_official 582:a89625bcd809 101 AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
mbed_official 582:a89625bcd809 102 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
mbed_official 582:a89625bcd809 103 AdcHandle.Init.NbrOfConversion = 1;
mbed_official 582:a89625bcd809 104 AdcHandle.Init.DMAContinuousRequests = DISABLE;
mbed_official 582:a89625bcd809 105 AdcHandle.Init.EOCSelection = DISABLE;
mbed_official 582:a89625bcd809 106
mbed_official 582:a89625bcd809 107 if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
mbed_official 582:a89625bcd809 108 error("Cannot initialize ADC");
mbed_official 573:ad23fe03a082 109 }
mbed_official 573:ad23fe03a082 110 }
mbed_official 573:ad23fe03a082 111
mbed_official 573:ad23fe03a082 112 static inline uint16_t adc_read(analogin_t *obj)
mbed_official 573:ad23fe03a082 113 {
mbed_official 582:a89625bcd809 114 ADC_ChannelConfTypeDef sConfig = {0};
mbed_official 573:ad23fe03a082 115
mbed_official 573:ad23fe03a082 116 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 573:ad23fe03a082 117
mbed_official 573:ad23fe03a082 118 // Configure ADC channel
mbed_official 573:ad23fe03a082 119 sConfig.Rank = 1;
mbed_official 582:a89625bcd809 120 sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
mbed_official 573:ad23fe03a082 121 sConfig.Offset = 0;
mbed_official 573:ad23fe03a082 122
mbed_official 573:ad23fe03a082 123 switch (obj->channel) {
mbed_official 573:ad23fe03a082 124 case 0:
mbed_official 573:ad23fe03a082 125 sConfig.Channel = ADC_CHANNEL_0;
mbed_official 573:ad23fe03a082 126 break;
mbed_official 573:ad23fe03a082 127 case 1:
mbed_official 573:ad23fe03a082 128 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 573:ad23fe03a082 129 break;
mbed_official 573:ad23fe03a082 130 case 2:
mbed_official 573:ad23fe03a082 131 sConfig.Channel = ADC_CHANNEL_2;
mbed_official 573:ad23fe03a082 132 break;
mbed_official 573:ad23fe03a082 133 case 3:
mbed_official 573:ad23fe03a082 134 sConfig.Channel = ADC_CHANNEL_3;
mbed_official 573:ad23fe03a082 135 break;
mbed_official 573:ad23fe03a082 136 case 4:
mbed_official 573:ad23fe03a082 137 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 573:ad23fe03a082 138 break;
mbed_official 573:ad23fe03a082 139 case 5:
mbed_official 573:ad23fe03a082 140 sConfig.Channel = ADC_CHANNEL_5;
mbed_official 573:ad23fe03a082 141 break;
mbed_official 573:ad23fe03a082 142 case 6:
mbed_official 573:ad23fe03a082 143 sConfig.Channel = ADC_CHANNEL_6;
mbed_official 573:ad23fe03a082 144 break;
mbed_official 573:ad23fe03a082 145 case 7:
mbed_official 573:ad23fe03a082 146 sConfig.Channel = ADC_CHANNEL_7;
mbed_official 573:ad23fe03a082 147 break;
mbed_official 573:ad23fe03a082 148 case 8:
mbed_official 573:ad23fe03a082 149 sConfig.Channel = ADC_CHANNEL_8;
mbed_official 573:ad23fe03a082 150 break;
mbed_official 573:ad23fe03a082 151 case 9:
mbed_official 573:ad23fe03a082 152 sConfig.Channel = ADC_CHANNEL_9;
mbed_official 573:ad23fe03a082 153 break;
mbed_official 573:ad23fe03a082 154 case 10:
mbed_official 573:ad23fe03a082 155 sConfig.Channel = ADC_CHANNEL_10;
mbed_official 573:ad23fe03a082 156 break;
mbed_official 573:ad23fe03a082 157 case 11:
mbed_official 573:ad23fe03a082 158 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 573:ad23fe03a082 159 break;
mbed_official 573:ad23fe03a082 160 case 12:
mbed_official 573:ad23fe03a082 161 sConfig.Channel = ADC_CHANNEL_12;
mbed_official 573:ad23fe03a082 162 break;
mbed_official 573:ad23fe03a082 163 case 13:
mbed_official 573:ad23fe03a082 164 sConfig.Channel = ADC_CHANNEL_13;
mbed_official 573:ad23fe03a082 165 break;
mbed_official 573:ad23fe03a082 166 case 14:
mbed_official 573:ad23fe03a082 167 sConfig.Channel = ADC_CHANNEL_14;
mbed_official 573:ad23fe03a082 168 break;
mbed_official 573:ad23fe03a082 169 case 15:
mbed_official 573:ad23fe03a082 170 sConfig.Channel = ADC_CHANNEL_15;
mbed_official 573:ad23fe03a082 171 break;
mbed_official 582:a89625bcd809 172 case 16:
mbed_official 582:a89625bcd809 173 sConfig.Channel = ADC_CHANNEL_16;
mbed_official 582:a89625bcd809 174 break;
mbed_official 582:a89625bcd809 175 case 17:
mbed_official 582:a89625bcd809 176 sConfig.Channel = ADC_CHANNEL_17;
mbed_official 582:a89625bcd809 177 break;
mbed_official 582:a89625bcd809 178 case 18:
mbed_official 582:a89625bcd809 179 sConfig.Channel = ADC_CHANNEL_18;
mbed_official 582:a89625bcd809 180 break;
mbed_official 573:ad23fe03a082 181 default:
mbed_official 573:ad23fe03a082 182 return 0;
mbed_official 573:ad23fe03a082 183 }
mbed_official 573:ad23fe03a082 184
mbed_official 582:a89625bcd809 185 if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK) {
mbed_official 582:a89625bcd809 186 error("Cannot configure ADC channel");
mbed_official 582:a89625bcd809 187 }
mbed_official 573:ad23fe03a082 188
mbed_official 573:ad23fe03a082 189 HAL_ADC_Start(&AdcHandle); // Start conversion
mbed_official 573:ad23fe03a082 190
mbed_official 573:ad23fe03a082 191 // Wait end of conversion and get value
mbed_official 582:a89625bcd809 192 HAL_ADC_PollForConversion(&AdcHandle, 10);
mbed_official 582:a89625bcd809 193 if (HAL_ADC_GetState(&AdcHandle) == HAL_ADC_STATE_EOC_REG) {
mbed_official 573:ad23fe03a082 194 return (HAL_ADC_GetValue(&AdcHandle));
mbed_official 573:ad23fe03a082 195 } else {
mbed_official 573:ad23fe03a082 196 return 0;
mbed_official 573:ad23fe03a082 197 }
mbed_official 573:ad23fe03a082 198 }
mbed_official 573:ad23fe03a082 199
mbed_official 573:ad23fe03a082 200 uint16_t analogin_read_u16(analogin_t *obj)
mbed_official 573:ad23fe03a082 201 {
mbed_official 573:ad23fe03a082 202 uint16_t value = adc_read(obj);
mbed_official 573:ad23fe03a082 203 // 12-bit to 16-bit conversion
mbed_official 573:ad23fe03a082 204 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
mbed_official 573:ad23fe03a082 205 return value;
mbed_official 573:ad23fe03a082 206 }
mbed_official 573:ad23fe03a082 207
mbed_official 573:ad23fe03a082 208 float analogin_read(analogin_t *obj)
mbed_official 573:ad23fe03a082 209 {
mbed_official 573:ad23fe03a082 210 uint16_t value = adc_read(obj);
mbed_official 573:ad23fe03a082 211 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 573:ad23fe03a082 212 }
mbed_official 573:ad23fe03a082 213
mbed_official 573:ad23fe03a082 214 #endif