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_NUCLEO_F103RB/analogin_api.c@167:d5744491c362, 2014-04-23 (annotated)

Committer:
mbed_official
Date:
Wed Apr 23 11:00:08 2014 +0100
Revision:
167:d5744491c362
Parent:
70:c1fbde68b492
Child:
174:8bb9f3a33240
Synchronized with git revision 6cf73e2e267b625c71cbf586a1d74e7e4972a369



Full URL: https://github.com/mbedmicro/mbed/commit/6cf73e2e267b625c71cbf586a1d74e7e4972a369/



[NUCLEO_F030R8/F302R8] Move back SetSysClock() call in SystemInit()

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:a51c77007319 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 3 * All rights reserved.
mbed_official 52:a51c77007319 4 *
mbed_official 70:c1fbde68b492 5 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 6 * modification, are permitted provided that the following conditions are met:
mbed_official 52:a51c77007319 7 *
mbed_official 70:c1fbde68b492 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 9 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 12 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 14 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 15 * without specific prior written permission.
mbed_official 52:a51c77007319 16 *
mbed_official 70:c1fbde68b492 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 52:a51c77007319 27 */
mbed_official 52:a51c77007319 28 #include "analogin_api.h"
mbed_official 52:a51c77007319 29 #include "wait_api.h"
mbed_official 52:a51c77007319 30
mbed_official 52:a51c77007319 31 #if DEVICE_ANALOGIN
mbed_official 52:a51c77007319 32
mbed_official 52:a51c77007319 33 #include "cmsis.h"
mbed_official 52:a51c77007319 34 #include "pinmap.h"
mbed_official 52:a51c77007319 35 #include "error.h"
mbed_official 52:a51c77007319 36
mbed_official 52:a51c77007319 37 static const PinMap PinMap_ADC[] = {
mbed_official 167:d5744491c362 38 {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN0
mbed_official 167:d5744491c362 39 {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN1
mbed_official 167:d5744491c362 40 {PA_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN2
mbed_official 167:d5744491c362 41 {PA_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN3
mbed_official 167:d5744491c362 42 {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN4
mbed_official 167:d5744491c362 43 {PA_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN5
mbed_official 167:d5744491c362 44 {PA_6, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN6
mbed_official 167:d5744491c362 45 {PA_7, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN7
mbed_official 167:d5744491c362 46 {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN8
mbed_official 167:d5744491c362 47 {PB_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN9
mbed_official 167:d5744491c362 48 {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN10
mbed_official 167:d5744491c362 49 {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN11
mbed_official 167:d5744491c362 50 {PC_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN12
mbed_official 167:d5744491c362 51 {PC_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN13
mbed_official 167:d5744491c362 52 {PC_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN14
mbed_official 167:d5744491c362 53 {PC_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)}, // ADC12_IN15
mbed_official 52:a51c77007319 54 {NC, NC, 0}
mbed_official 52:a51c77007319 55 };
mbed_official 52:a51c77007319 56
mbed_official 52:a51c77007319 57 int adc_inited = 0;
mbed_official 52:a51c77007319 58
mbed_official 52:a51c77007319 59 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 52:a51c77007319 60
mbed_official 52:a51c77007319 61 ADC_TypeDef *adc;
mbed_official 52:a51c77007319 62 ADC_InitTypeDef ADC_InitStructure;
mbed_official 52:a51c77007319 63
mbed_official 167:d5744491c362 64 // Get the peripheral name from the pin and assign it to the object
mbed_official 52:a51c77007319 65 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 52:a51c77007319 66
mbed_official 52:a51c77007319 67 if (obj->adc == (ADCName)NC) {
mbed_official 52:a51c77007319 68 error("ADC pin mapping failed");
mbed_official 52:a51c77007319 69 }
mbed_official 52:a51c77007319 70
mbed_official 52:a51c77007319 71 // Configure GPIO
mbed_official 52:a51c77007319 72 pinmap_pinout(pin, PinMap_ADC);
mbed_official 52:a51c77007319 73
mbed_official 52:a51c77007319 74 // Save pin number for the read function
mbed_official 52:a51c77007319 75 obj->pin = pin;
mbed_official 52:a51c77007319 76
mbed_official 52:a51c77007319 77 // The ADC initialization is done once
mbed_official 52:a51c77007319 78 if (adc_inited == 0) {
mbed_official 52:a51c77007319 79 adc_inited = 1;
mbed_official 52:a51c77007319 80
mbed_official 52:a51c77007319 81 // Get ADC registers structure address
mbed_official 52:a51c77007319 82 adc = (ADC_TypeDef *)(obj->adc);
mbed_official 52:a51c77007319 83
mbed_official 167:d5744491c362 84 // Enable ADC clock (14 MHz maximum)
mbed_official 167:d5744491c362 85 // PCLK2 = 64 MHz --> ADC clock = 64/6 = 10.666 MHz
mbed_official 167:d5744491c362 86 RCC_ADCCLKConfig(RCC_PCLK2_Div6);
mbed_official 52:a51c77007319 87 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
mbed_official 52:a51c77007319 88
mbed_official 52:a51c77007319 89 // Configure ADC
mbed_official 167:d5744491c362 90 ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
mbed_official 167:d5744491c362 91 ADC_InitStructure.ADC_ScanConvMode = DISABLE;
mbed_official 52:a51c77007319 92 ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
mbed_official 167:d5744491c362 93 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
mbed_official 167:d5744491c362 94 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
mbed_official 167:d5744491c362 95 ADC_InitStructure.ADC_NbrOfChannel = 1;
mbed_official 52:a51c77007319 96 ADC_Init(adc, &ADC_InitStructure);
mbed_official 52:a51c77007319 97
mbed_official 52:a51c77007319 98 // Enable ADC
mbed_official 52:a51c77007319 99 ADC_Cmd(adc, ENABLE);
mbed_official 52:a51c77007319 100
mbed_official 52:a51c77007319 101 // Calibrate ADC
mbed_official 52:a51c77007319 102 ADC_ResetCalibration(adc);
mbed_official 52:a51c77007319 103 while(ADC_GetResetCalibrationStatus(adc));
mbed_official 52:a51c77007319 104 ADC_StartCalibration(adc);
mbed_official 52:a51c77007319 105 while(ADC_GetCalibrationStatus(adc));
mbed_official 52:a51c77007319 106 }
mbed_official 52:a51c77007319 107 }
mbed_official 52:a51c77007319 108
mbed_official 52:a51c77007319 109 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 52:a51c77007319 110 // Get ADC registers structure address
mbed_official 52:a51c77007319 111 ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc);
mbed_official 167:d5744491c362 112 int channel = 0;
mbed_official 52:a51c77007319 113
mbed_official 52:a51c77007319 114 // Configure ADC channel
mbed_official 52:a51c77007319 115 switch (obj->pin) {
mbed_official 52:a51c77007319 116 case PA_0:
mbed_official 167:d5744491c362 117 channel = 0;
mbed_official 52:a51c77007319 118 break;
mbed_official 52:a51c77007319 119 case PA_1:
mbed_official 167:d5744491c362 120 channel = 1;
mbed_official 52:a51c77007319 121 break;
mbed_official 167:d5744491c362 122 case PA_2:
mbed_official 167:d5744491c362 123 channel = 2;
mbed_official 167:d5744491c362 124 break;
mbed_official 167:d5744491c362 125 case PA_3:
mbed_official 167:d5744491c362 126 channel = 3;
mbed_official 167:d5744491c362 127 break;
mbed_official 52:a51c77007319 128 case PA_4:
mbed_official 167:d5744491c362 129 channel = 4;
mbed_official 167:d5744491c362 130 break;
mbed_official 167:d5744491c362 131 case PA_5:
mbed_official 167:d5744491c362 132 channel = 5;
mbed_official 52:a51c77007319 133 break;
mbed_official 167:d5744491c362 134 case PA_6:
mbed_official 167:d5744491c362 135 channel = 6;
mbed_official 167:d5744491c362 136 break;
mbed_official 167:d5744491c362 137 case PA_7:
mbed_official 167:d5744491c362 138 channel = 7;
mbed_official 167:d5744491c362 139 break;
mbed_official 52:a51c77007319 140 case PB_0:
mbed_official 167:d5744491c362 141 channel = 8;
mbed_official 167:d5744491c362 142 break;
mbed_official 167:d5744491c362 143 case PB_1:
mbed_official 167:d5744491c362 144 channel = 9;
mbed_official 167:d5744491c362 145 break;
mbed_official 167:d5744491c362 146 case PC_0:
mbed_official 167:d5744491c362 147 channel = 10;
mbed_official 52:a51c77007319 148 break;
mbed_official 52:a51c77007319 149 case PC_1:
mbed_official 167:d5744491c362 150 channel = 11;
mbed_official 167:d5744491c362 151 break;
mbed_official 167:d5744491c362 152 case PC_2:
mbed_official 167:d5744491c362 153 channel = 12;
mbed_official 52:a51c77007319 154 break;
mbed_official 167:d5744491c362 155 case PC_3:
mbed_official 167:d5744491c362 156 channel = 13;
mbed_official 52:a51c77007319 157 break;
mbed_official 167:d5744491c362 158 case PC_4:
mbed_official 167:d5744491c362 159 channel = 14;
mbed_official 167:d5744491c362 160 break;
mbed_official 167:d5744491c362 161 case PC_5:
mbed_official 167:d5744491c362 162 channel = 15;
mbed_official 167:d5744491c362 163 break;
mbed_official 52:a51c77007319 164 default:
mbed_official 52:a51c77007319 165 return 0;
mbed_official 52:a51c77007319 166 }
mbed_official 52:a51c77007319 167
mbed_official 167:d5744491c362 168 ADC_RegularChannelConfig(adc, channel, 1, ADC_SampleTime_7Cycles5);
mbed_official 167:d5744491c362 169
mbed_official 52:a51c77007319 170 ADC_SoftwareStartConvCmd(adc, ENABLE); // Start conversion
mbed_official 52:a51c77007319 171
mbed_official 52:a51c77007319 172 while(ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion
mbed_official 52:a51c77007319 173
mbed_official 52:a51c77007319 174 return(ADC_GetConversionValue(adc)); // Get conversion value
mbed_official 52:a51c77007319 175 }
mbed_official 52:a51c77007319 176
mbed_official 52:a51c77007319 177 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 52:a51c77007319 178 return(adc_read(obj));
mbed_official 52:a51c77007319 179 }
mbed_official 52:a51c77007319 180
mbed_official 52:a51c77007319 181 float analogin_read(analogin_t *obj) {
mbed_official 52:a51c77007319 182 uint16_t value = adc_read(obj);
mbed_official 52:a51c77007319 183 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 52:a51c77007319 184 }
mbed_official 52:a51c77007319 185
mbed_official 52:a51c77007319 186 #endif