test / mbed-src

mbed library sources

Dependents:   bare

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/analogin_api.c@125:23cc3068a9e4, 2014-03-19 (annotated)

Committer:
mbed_official
Date:
Wed Mar 19 10:15:22 2014 +0000
Revision:
125:23cc3068a9e4
Synchronized with git revision ace35dfba3748c7cdc102eb38ec6b9e1067c3252



Full URL: https://github.com/mbedmicro/mbed/commit/ace35dfba3748c7cdc102eb38ec6b9e1067c3252/



[NUCLEO_F302R8] Add cmsis and hal files + change F401RE clock to 84MHz

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 125:23cc3068a9e4 1 /* mbed Microcontroller Library
mbed_official 125:23cc3068a9e4 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 125:23cc3068a9e4 3 * All rights reserved.
mbed_official 125:23cc3068a9e4 4 *
mbed_official 125:23cc3068a9e4 5 * Redistribution and use in source and binary forms, with or without
mbed_official 125:23cc3068a9e4 6 * modification, are permitted provided that the following conditions are met:
mbed_official 125:23cc3068a9e4 7 *
mbed_official 125:23cc3068a9e4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 125:23cc3068a9e4 9 * this list of conditions and the following disclaimer.
mbed_official 125:23cc3068a9e4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 125:23cc3068a9e4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 125:23cc3068a9e4 12 * and/or other materials provided with the distribution.
mbed_official 125:23cc3068a9e4 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 125:23cc3068a9e4 14 * may be used to endorse or promote products derived from this software
mbed_official 125:23cc3068a9e4 15 * without specific prior written permission.
mbed_official 125:23cc3068a9e4 16 *
mbed_official 125:23cc3068a9e4 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 125:23cc3068a9e4 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 125:23cc3068a9e4 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 125:23cc3068a9e4 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 125:23cc3068a9e4 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 125:23cc3068a9e4 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 125:23cc3068a9e4 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 125:23cc3068a9e4 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 125:23cc3068a9e4 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 125:23cc3068a9e4 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 125:23cc3068a9e4 27 */
mbed_official 125:23cc3068a9e4 28 #include "analogin_api.h"
mbed_official 125:23cc3068a9e4 29 #include "wait_api.h"
mbed_official 125:23cc3068a9e4 30
mbed_official 125:23cc3068a9e4 31 #if DEVICE_ANALOGIN
mbed_official 125:23cc3068a9e4 32
mbed_official 125:23cc3068a9e4 33 #include "cmsis.h"
mbed_official 125:23cc3068a9e4 34 #include "pinmap.h"
mbed_official 125:23cc3068a9e4 35 #include "error.h"
mbed_official 125:23cc3068a9e4 36
mbed_official 125:23cc3068a9e4 37 static const PinMap PinMap_ADC[] = {
mbed_official 125:23cc3068a9e4 38 {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN1
mbed_official 125:23cc3068a9e4 39 {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN2
mbed_official 125:23cc3068a9e4 40 {PA_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN3
mbed_official 125:23cc3068a9e4 41 {PA_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN4
mbed_official 125:23cc3068a9e4 42 {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN5
mbed_official 125:23cc3068a9e4 43 {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN6
mbed_official 125:23cc3068a9e4 44 {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN7
mbed_official 125:23cc3068a9e4 45 {PC_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN8
mbed_official 125:23cc3068a9e4 46 {PC_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN9
mbed_official 125:23cc3068a9e4 47 {PA_6, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN10
mbed_official 125:23cc3068a9e4 48 {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN11
mbed_official 125:23cc3068a9e4 49 {PB_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN12
mbed_official 125:23cc3068a9e4 50 {PB_13, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN13
mbed_official 125:23cc3068a9e4 51 {PB_11, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN14
mbed_official 125:23cc3068a9e4 52 {PA_7, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN15
mbed_official 125:23cc3068a9e4 53 {NC, NC, 0}
mbed_official 125:23cc3068a9e4 54 };
mbed_official 125:23cc3068a9e4 55
mbed_official 125:23cc3068a9e4 56 int adc_inited = 0;
mbed_official 125:23cc3068a9e4 57
mbed_official 125:23cc3068a9e4 58 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 125:23cc3068a9e4 59
mbed_official 125:23cc3068a9e4 60 ADC_TypeDef *adc;
mbed_official 125:23cc3068a9e4 61 ADC_InitTypeDef ADC_InitStructure;
mbed_official 125:23cc3068a9e4 62 ADC_CommonInitTypeDef ADC_CommonInitStructure;
mbed_official 125:23cc3068a9e4 63
mbed_official 125:23cc3068a9e4 64 // Get the peripheral name from the pin and assign it to the object
mbed_official 125:23cc3068a9e4 65 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 125:23cc3068a9e4 66
mbed_official 125:23cc3068a9e4 67 if (obj->adc == (ADCName)NC) {
mbed_official 125:23cc3068a9e4 68 error("ADC pin mapping failed");
mbed_official 125:23cc3068a9e4 69 }
mbed_official 125:23cc3068a9e4 70
mbed_official 125:23cc3068a9e4 71 // Configure GPIO
mbed_official 125:23cc3068a9e4 72 pinmap_pinout(pin, PinMap_ADC);
mbed_official 125:23cc3068a9e4 73
mbed_official 125:23cc3068a9e4 74 // Save pin number for the read function
mbed_official 125:23cc3068a9e4 75 obj->pin = pin;
mbed_official 125:23cc3068a9e4 76
mbed_official 125:23cc3068a9e4 77 // The ADC initialization is done once
mbed_official 125:23cc3068a9e4 78 if (adc_inited == 0) {
mbed_official 125:23cc3068a9e4 79 adc_inited = 1;
mbed_official 125:23cc3068a9e4 80
mbed_official 125:23cc3068a9e4 81 // Get ADC registers structure address
mbed_official 125:23cc3068a9e4 82 adc = (ADC_TypeDef *)(obj->adc);
mbed_official 125:23cc3068a9e4 83
mbed_official 125:23cc3068a9e4 84 // Enable ADC clock
mbed_official 125:23cc3068a9e4 85 RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div1);
mbed_official 125:23cc3068a9e4 86 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12, ENABLE);
mbed_official 125:23cc3068a9e4 87
mbed_official 125:23cc3068a9e4 88 // Calibration
mbed_official 125:23cc3068a9e4 89 ADC_VoltageRegulatorCmd(adc, ENABLE);
mbed_official 125:23cc3068a9e4 90 wait_us(10);
mbed_official 125:23cc3068a9e4 91 ADC_SelectCalibrationMode(adc, ADC_CalibrationMode_Single);
mbed_official 125:23cc3068a9e4 92 ADC_StartCalibration(adc);
mbed_official 125:23cc3068a9e4 93 while (ADC_GetCalibrationStatus(adc) != RESET ) {}
mbed_official 125:23cc3068a9e4 94
mbed_official 125:23cc3068a9e4 95 // Configure ADC
mbed_official 125:23cc3068a9e4 96 ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
mbed_official 125:23cc3068a9e4 97 ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;
mbed_official 125:23cc3068a9e4 98 ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
mbed_official 125:23cc3068a9e4 99 ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_OneShot;
mbed_official 125:23cc3068a9e4 100 ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0;
mbed_official 125:23cc3068a9e4 101 ADC_CommonInit(adc, &ADC_CommonInitStructure);
mbed_official 125:23cc3068a9e4 102
mbed_official 125:23cc3068a9e4 103 ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Disable;
mbed_official 125:23cc3068a9e4 104 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
mbed_official 125:23cc3068a9e4 105 ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
mbed_official 125:23cc3068a9e4 106 ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
mbed_official 125:23cc3068a9e4 107 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
mbed_official 125:23cc3068a9e4 108 ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
mbed_official 125:23cc3068a9e4 109 ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
mbed_official 125:23cc3068a9e4 110 ADC_InitStructure.ADC_NbrOfRegChannel = 1;
mbed_official 125:23cc3068a9e4 111 ADC_Init(adc, &ADC_InitStructure);
mbed_official 125:23cc3068a9e4 112
mbed_official 125:23cc3068a9e4 113 // Enable ADC
mbed_official 125:23cc3068a9e4 114 ADC_Cmd(adc, ENABLE);
mbed_official 125:23cc3068a9e4 115
mbed_official 125:23cc3068a9e4 116 while(!ADC_GetFlagStatus(adc, ADC_FLAG_RDY)) {}
mbed_official 125:23cc3068a9e4 117 }
mbed_official 125:23cc3068a9e4 118 }
mbed_official 125:23cc3068a9e4 119
mbed_official 125:23cc3068a9e4 120 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 125:23cc3068a9e4 121 // Get ADC registers structure address
mbed_official 125:23cc3068a9e4 122 ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc);
mbed_official 125:23cc3068a9e4 123 uint8_t channel = 0;
mbed_official 125:23cc3068a9e4 124
mbed_official 125:23cc3068a9e4 125 // Configure ADC channel
mbed_official 125:23cc3068a9e4 126 switch (obj->pin) {
mbed_official 125:23cc3068a9e4 127 case PA_0:
mbed_official 125:23cc3068a9e4 128 channel = ADC_Channel_1;
mbed_official 125:23cc3068a9e4 129 break;
mbed_official 125:23cc3068a9e4 130 case PA_1:
mbed_official 125:23cc3068a9e4 131 channel = ADC_Channel_2;
mbed_official 125:23cc3068a9e4 132 break;
mbed_official 125:23cc3068a9e4 133 case PA_2:
mbed_official 125:23cc3068a9e4 134 channel = ADC_Channel_3;
mbed_official 125:23cc3068a9e4 135 break;
mbed_official 125:23cc3068a9e4 136 case PA_3:
mbed_official 125:23cc3068a9e4 137 channel = ADC_Channel_4;
mbed_official 125:23cc3068a9e4 138 break;
mbed_official 125:23cc3068a9e4 139 case PA_4:
mbed_official 125:23cc3068a9e4 140 channel = ADC_Channel_5;
mbed_official 125:23cc3068a9e4 141 break;
mbed_official 125:23cc3068a9e4 142 case PC_0:
mbed_official 125:23cc3068a9e4 143 channel = ADC_Channel_6;
mbed_official 125:23cc3068a9e4 144 break;
mbed_official 125:23cc3068a9e4 145 case PC_1:
mbed_official 125:23cc3068a9e4 146 channel = ADC_Channel_7;
mbed_official 125:23cc3068a9e4 147 break;
mbed_official 125:23cc3068a9e4 148 case PC_2:
mbed_official 125:23cc3068a9e4 149 channel = ADC_Channel_8;
mbed_official 125:23cc3068a9e4 150 break;
mbed_official 125:23cc3068a9e4 151 case PC_3:
mbed_official 125:23cc3068a9e4 152 channel = ADC_Channel_9;
mbed_official 125:23cc3068a9e4 153 break;
mbed_official 125:23cc3068a9e4 154 case PA_6:
mbed_official 125:23cc3068a9e4 155 channel = ADC_Channel_10;
mbed_official 125:23cc3068a9e4 156 break;
mbed_official 125:23cc3068a9e4 157 case PB_0:
mbed_official 125:23cc3068a9e4 158 channel = ADC_Channel_11;
mbed_official 125:23cc3068a9e4 159 break;
mbed_official 125:23cc3068a9e4 160 case PB_1:
mbed_official 125:23cc3068a9e4 161 channel = ADC_Channel_12;
mbed_official 125:23cc3068a9e4 162 break;
mbed_official 125:23cc3068a9e4 163 case PB_13:
mbed_official 125:23cc3068a9e4 164 channel = ADC_Channel_13;
mbed_official 125:23cc3068a9e4 165 break;
mbed_official 125:23cc3068a9e4 166 case PB_11:
mbed_official 125:23cc3068a9e4 167 channel = ADC_Channel_14;
mbed_official 125:23cc3068a9e4 168 break;
mbed_official 125:23cc3068a9e4 169 case PA_7:
mbed_official 125:23cc3068a9e4 170 channel = ADC_Channel_15;
mbed_official 125:23cc3068a9e4 171 break;
mbed_official 125:23cc3068a9e4 172 default:
mbed_official 125:23cc3068a9e4 173 return 0;
mbed_official 125:23cc3068a9e4 174 }
mbed_official 125:23cc3068a9e4 175
mbed_official 125:23cc3068a9e4 176 ADC_RegularChannelConfig(adc, channel, 1, ADC_SampleTime_7Cycles5);
mbed_official 125:23cc3068a9e4 177
mbed_official 125:23cc3068a9e4 178 ADC_StartConversion(adc); // Start conversion
mbed_official 125:23cc3068a9e4 179
mbed_official 125:23cc3068a9e4 180 while(ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion
mbed_official 125:23cc3068a9e4 181
mbed_official 125:23cc3068a9e4 182 return(ADC_GetConversionValue(adc)); // Get conversion value
mbed_official 125:23cc3068a9e4 183 }
mbed_official 125:23cc3068a9e4 184
mbed_official 125:23cc3068a9e4 185 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 125:23cc3068a9e4 186 return(adc_read(obj));
mbed_official 125:23cc3068a9e4 187 }
mbed_official 125:23cc3068a9e4 188
mbed_official 125:23cc3068a9e4 189 float analogin_read(analogin_t *obj) {
mbed_official 125:23cc3068a9e4 190 uint16_t value = adc_read(obj);
mbed_official 125:23cc3068a9e4 191 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 125:23cc3068a9e4 192 }
mbed_official 125:23cc3068a9e4 193
mbed_official 125:23cc3068a9e4 194 #endif