shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F303VC/analogin_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
227:7bd0639b8911 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /* mbed Microcontroller Library
mbed_official 157:90e3acc479a2 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 157:90e3acc479a2 3 * All rights reserved.
mbed_official 157:90e3acc479a2 4 *
mbed_official 157:90e3acc479a2 5 * Redistribution and use in source and binary forms, with or without
mbed_official 157:90e3acc479a2 6 * modification, are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 7 *
mbed_official 157:90e3acc479a2 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 9 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 12 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 14 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 15 * without specific prior written permission.
mbed_official 157:90e3acc479a2 16 *
mbed_official 157:90e3acc479a2 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 157:90e3acc479a2 29 #include "analogin_api.h"
mbed_official 157:90e3acc479a2 30 #include "wait_api.h"
mbed_official 157:90e3acc479a2 31
mbed_official 157:90e3acc479a2 32 #if DEVICE_ANALOGIN
mbed_official 157:90e3acc479a2 33
mbed_official 157:90e3acc479a2 34 #include "cmsis.h"
mbed_official 157:90e3acc479a2 35 #include "pinmap.h"
mbed_official 157:90e3acc479a2 36
mbed_official 157:90e3acc479a2 37 static const PinMap PinMap_ADC[] = {
mbed_official 157:90e3acc479a2 38 {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN1
mbed_official 157:90e3acc479a2 39 {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN2
mbed_official 157:90e3acc479a2 40 {PA_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN3
mbed_official 157:90e3acc479a2 41 {PA_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN4
mbed_official 157:90e3acc479a2 42 {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN5
mbed_official 157:90e3acc479a2 43 {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN6
mbed_official 157:90e3acc479a2 44 {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN7
mbed_official 157:90e3acc479a2 45 {PC_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN8
mbed_official 157:90e3acc479a2 46 {PC_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN9
mbed_official 157:90e3acc479a2 47 {PA_6, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN10
mbed_official 157:90e3acc479a2 48 {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN11
mbed_official 157:90e3acc479a2 49 {PB_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN12
mbed_official 157:90e3acc479a2 50 {PB_13, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN13
mbed_official 157:90e3acc479a2 51 {PB_11, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN14
mbed_official 157:90e3acc479a2 52 {PA_7, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN15
mbed_official 157:90e3acc479a2 53 {NC, NC, 0}
mbed_official 157:90e3acc479a2 54 };
mbed_official 157:90e3acc479a2 55
mbed_official 157:90e3acc479a2 56 int adc_inited = 0;
mbed_official 157:90e3acc479a2 57
mbed_official 157:90e3acc479a2 58 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 157:90e3acc479a2 59
mbed_official 157:90e3acc479a2 60 ADC_TypeDef *adc;
mbed_official 157:90e3acc479a2 61 ADC_InitTypeDef ADC_InitStructure;
mbed_official 157:90e3acc479a2 62 ADC_CommonInitTypeDef ADC_CommonInitStructure;
mbed_official 157:90e3acc479a2 63
mbed_official 157:90e3acc479a2 64 // Get the peripheral name from the pin and assign it to the object
mbed_official 157:90e3acc479a2 65 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 227:7bd0639b8911 66 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 157:90e3acc479a2 67
mbed_official 157:90e3acc479a2 68 // Configure GPIO
mbed_official 157:90e3acc479a2 69 pinmap_pinout(pin, PinMap_ADC);
mbed_official 157:90e3acc479a2 70
mbed_official 157:90e3acc479a2 71 // Save pin number for the read function
mbed_official 157:90e3acc479a2 72 obj->pin = pin;
mbed_official 157:90e3acc479a2 73
mbed_official 157:90e3acc479a2 74 // The ADC initialization is done once
mbed_official 157:90e3acc479a2 75 if (adc_inited == 0) {
mbed_official 157:90e3acc479a2 76 adc_inited = 1;
mbed_official 157:90e3acc479a2 77
mbed_official 157:90e3acc479a2 78 // Get ADC registers structure address
mbed_official 157:90e3acc479a2 79 adc = (ADC_TypeDef *)(obj->adc);
mbed_official 157:90e3acc479a2 80
mbed_official 157:90e3acc479a2 81 // Enable ADC clock
mbed_official 157:90e3acc479a2 82 RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div1);
mbed_official 157:90e3acc479a2 83 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12, ENABLE);
mbed_official 157:90e3acc479a2 84
mbed_official 157:90e3acc479a2 85 // Calibration
mbed_official 157:90e3acc479a2 86 ADC_VoltageRegulatorCmd(adc, ENABLE);
mbed_official 157:90e3acc479a2 87 wait_us(10);
mbed_official 157:90e3acc479a2 88 ADC_SelectCalibrationMode(adc, ADC_CalibrationMode_Single);
mbed_official 157:90e3acc479a2 89 ADC_StartCalibration(adc);
mbed_official 157:90e3acc479a2 90 while (ADC_GetCalibrationStatus(adc) != RESET) {}
mbed_official 157:90e3acc479a2 91
mbed_official 157:90e3acc479a2 92 // Configure ADC
mbed_official 157:90e3acc479a2 93 ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
mbed_official 157:90e3acc479a2 94 ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;
mbed_official 157:90e3acc479a2 95 ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
mbed_official 157:90e3acc479a2 96 ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_OneShot;
mbed_official 157:90e3acc479a2 97 ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0;
mbed_official 157:90e3acc479a2 98 ADC_CommonInit(adc, &ADC_CommonInitStructure);
mbed_official 157:90e3acc479a2 99
mbed_official 157:90e3acc479a2 100 ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Disable;
mbed_official 157:90e3acc479a2 101 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
mbed_official 157:90e3acc479a2 102 ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
mbed_official 157:90e3acc479a2 103 ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
mbed_official 157:90e3acc479a2 104 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
mbed_official 157:90e3acc479a2 105 ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
mbed_official 157:90e3acc479a2 106 ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
mbed_official 157:90e3acc479a2 107 ADC_InitStructure.ADC_NbrOfRegChannel = 1;
mbed_official 157:90e3acc479a2 108 ADC_Init(adc, &ADC_InitStructure);
mbed_official 157:90e3acc479a2 109
mbed_official 157:90e3acc479a2 110 // Enable ADC
mbed_official 157:90e3acc479a2 111 ADC_Cmd(adc, ENABLE);
mbed_official 157:90e3acc479a2 112
mbed_official 157:90e3acc479a2 113 while (!ADC_GetFlagStatus(adc, ADC_FLAG_RDY)) {}
mbed_official 157:90e3acc479a2 114 }
mbed_official 157:90e3acc479a2 115 }
mbed_official 157:90e3acc479a2 116
mbed_official 157:90e3acc479a2 117 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 157:90e3acc479a2 118 // Get ADC registers structure address
mbed_official 157:90e3acc479a2 119 ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc);
mbed_official 157:90e3acc479a2 120 uint8_t channel = 0;
mbed_official 157:90e3acc479a2 121
mbed_official 157:90e3acc479a2 122 // Configure ADC channel
mbed_official 157:90e3acc479a2 123 switch (obj->pin) {
mbed_official 157:90e3acc479a2 124 case PA_0:
mbed_official 157:90e3acc479a2 125 channel = ADC_Channel_1;
mbed_official 157:90e3acc479a2 126 break;
mbed_official 157:90e3acc479a2 127 case PA_1:
mbed_official 157:90e3acc479a2 128 channel = ADC_Channel_2;
mbed_official 157:90e3acc479a2 129 break;
mbed_official 157:90e3acc479a2 130 case PA_2:
mbed_official 157:90e3acc479a2 131 channel = ADC_Channel_3;
mbed_official 157:90e3acc479a2 132 break;
mbed_official 157:90e3acc479a2 133 case PA_3:
mbed_official 157:90e3acc479a2 134 channel = ADC_Channel_4;
mbed_official 157:90e3acc479a2 135 break;
mbed_official 157:90e3acc479a2 136 case PA_4:
mbed_official 157:90e3acc479a2 137 channel = ADC_Channel_5;
mbed_official 157:90e3acc479a2 138 break;
mbed_official 157:90e3acc479a2 139 case PC_0:
mbed_official 157:90e3acc479a2 140 channel = ADC_Channel_6;
mbed_official 157:90e3acc479a2 141 break;
mbed_official 157:90e3acc479a2 142 case PC_1:
mbed_official 157:90e3acc479a2 143 channel = ADC_Channel_7;
mbed_official 157:90e3acc479a2 144 break;
mbed_official 157:90e3acc479a2 145 case PC_2:
mbed_official 157:90e3acc479a2 146 channel = ADC_Channel_8;
mbed_official 157:90e3acc479a2 147 break;
mbed_official 157:90e3acc479a2 148 case PC_3:
mbed_official 157:90e3acc479a2 149 channel = ADC_Channel_9;
mbed_official 157:90e3acc479a2 150 break;
mbed_official 157:90e3acc479a2 151 case PA_6:
mbed_official 157:90e3acc479a2 152 channel = ADC_Channel_10;
mbed_official 157:90e3acc479a2 153 break;
mbed_official 157:90e3acc479a2 154 case PB_0:
mbed_official 157:90e3acc479a2 155 channel = ADC_Channel_11;
mbed_official 157:90e3acc479a2 156 break;
mbed_official 157:90e3acc479a2 157 case PB_1:
mbed_official 157:90e3acc479a2 158 channel = ADC_Channel_12;
mbed_official 157:90e3acc479a2 159 break;
mbed_official 157:90e3acc479a2 160 case PB_13:
mbed_official 157:90e3acc479a2 161 channel = ADC_Channel_13;
mbed_official 157:90e3acc479a2 162 break;
mbed_official 157:90e3acc479a2 163 case PB_11:
mbed_official 157:90e3acc479a2 164 channel = ADC_Channel_14;
mbed_official 157:90e3acc479a2 165 break;
mbed_official 157:90e3acc479a2 166 case PA_7:
mbed_official 157:90e3acc479a2 167 channel = ADC_Channel_15;
mbed_official 227:7bd0639b8911 168 break;
mbed_official 157:90e3acc479a2 169 default:
mbed_official 157:90e3acc479a2 170 return 0;
mbed_official 157:90e3acc479a2 171 }
mbed_official 157:90e3acc479a2 172
mbed_official 157:90e3acc479a2 173 ADC_RegularChannelConfig(adc, channel, 1, ADC_SampleTime_7Cycles5);
mbed_official 157:90e3acc479a2 174
mbed_official 157:90e3acc479a2 175 ADC_StartConversion(adc); // Start conversion
mbed_official 157:90e3acc479a2 176
mbed_official 157:90e3acc479a2 177 while (ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion
mbed_official 157:90e3acc479a2 178
mbed_official 157:90e3acc479a2 179 return (ADC_GetConversionValue(adc)); // Get conversion value
mbed_official 157:90e3acc479a2 180 }
mbed_official 157:90e3acc479a2 181
mbed_official 157:90e3acc479a2 182 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 157:90e3acc479a2 183 return (adc_read(obj));
mbed_official 157:90e3acc479a2 184 }
mbed_official 157:90e3acc479a2 185
mbed_official 157:90e3acc479a2 186 float analogin_read(analogin_t *obj) {
mbed_official 157:90e3acc479a2 187 uint16_t value = adc_read(obj);
mbed_official 157:90e3acc479a2 188 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 157:90e3acc479a2 189 }
mbed_official 157:90e3acc479a2 190
mbed_official 157:90e3acc479a2 191 #endif