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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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:

Import librarymbed

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_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