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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

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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@70:c1fbde68b492, 2014-01-07 (annotated)

Committer:
mbed_official
Date:
Tue Jan 07 11:00:05 2014 +0000
Revision:
70:c1fbde68b492
Parent:
56:99eb381a3269
Child:
167:d5744491c362
Synchronized with git revision 3f438a307904431f2782db3c8fa49946b9fc1d85



Full URL: https://github.com/mbedmicro/mbed/commit/3f438a307904431f2782db3c8fa49946b9fc1d85/



[NUCLEO_F103RB] license text changed + sleep hal updated

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 52:a51c77007319 38 {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 52:a51c77007319 39 {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 52:a51c77007319 40 {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 52:a51c77007319 41 {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 52:a51c77007319 42 {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 52:a51c77007319 43 {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 52:a51c77007319 44 {NC, NC, 0}
mbed_official 52:a51c77007319 45 };
mbed_official 52:a51c77007319 46
mbed_official 52:a51c77007319 47 int adc_inited = 0;
mbed_official 52:a51c77007319 48
mbed_official 52:a51c77007319 49 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 52:a51c77007319 50
mbed_official 52:a51c77007319 51 ADC_TypeDef *adc;
mbed_official 52:a51c77007319 52 ADC_InitTypeDef ADC_InitStructure;
mbed_official 52:a51c77007319 53
mbed_official 52:a51c77007319 54 // Get the peripheral name (ADC_1, ADC_2...) from the pin and assign it to the object
mbed_official 52:a51c77007319 55 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 52:a51c77007319 56
mbed_official 52:a51c77007319 57 if (obj->adc == (ADCName)NC) {
mbed_official 52:a51c77007319 58 error("ADC pin mapping failed");
mbed_official 52:a51c77007319 59 }
mbed_official 52:a51c77007319 60
mbed_official 52:a51c77007319 61 // Configure GPIO
mbed_official 52:a51c77007319 62 pinmap_pinout(pin, PinMap_ADC);
mbed_official 52:a51c77007319 63
mbed_official 52:a51c77007319 64 // Save pin number for the read function
mbed_official 52:a51c77007319 65 obj->pin = pin;
mbed_official 52:a51c77007319 66
mbed_official 52:a51c77007319 67 // The ADC initialization is done once
mbed_official 52:a51c77007319 68 if (adc_inited == 0) {
mbed_official 52:a51c77007319 69 adc_inited = 1;
mbed_official 52:a51c77007319 70
mbed_official 52:a51c77007319 71 // Get ADC registers structure address
mbed_official 52:a51c77007319 72 adc = (ADC_TypeDef *)(obj->adc);
mbed_official 52:a51c77007319 73
mbed_official 52:a51c77007319 74 // Enable ADC clock
mbed_official 52:a51c77007319 75 RCC_ADCCLKConfig(RCC_PCLK2_Div4);
mbed_official 52:a51c77007319 76 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
mbed_official 52:a51c77007319 77
mbed_official 52:a51c77007319 78 // Configure ADC
mbed_official 52:a51c77007319 79 ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
mbed_official 52:a51c77007319 80 ADC_InitStructure.ADC_ScanConvMode = DISABLE;
mbed_official 52:a51c77007319 81 ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
mbed_official 52:a51c77007319 82 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
mbed_official 52:a51c77007319 83 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
mbed_official 52:a51c77007319 84 ADC_InitStructure.ADC_NbrOfChannel = 1;
mbed_official 52:a51c77007319 85 ADC_Init(adc, &ADC_InitStructure);
mbed_official 52:a51c77007319 86
mbed_official 52:a51c77007319 87 // Enable ADC
mbed_official 52:a51c77007319 88 ADC_Cmd(adc, ENABLE);
mbed_official 52:a51c77007319 89
mbed_official 52:a51c77007319 90 // Calibrate ADC
mbed_official 52:a51c77007319 91 ADC_ResetCalibration(adc);
mbed_official 52:a51c77007319 92 while(ADC_GetResetCalibrationStatus(adc));
mbed_official 52:a51c77007319 93 ADC_StartCalibration(adc);
mbed_official 52:a51c77007319 94 while(ADC_GetCalibrationStatus(adc));
mbed_official 52:a51c77007319 95 }
mbed_official 52:a51c77007319 96 }
mbed_official 52:a51c77007319 97
mbed_official 52:a51c77007319 98 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 52:a51c77007319 99 // Get ADC registers structure address
mbed_official 52:a51c77007319 100 ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc);
mbed_official 52:a51c77007319 101
mbed_official 52:a51c77007319 102 // Configure ADC channel
mbed_official 52:a51c77007319 103 switch (obj->pin) {
mbed_official 52:a51c77007319 104 case PA_0:
mbed_official 52:a51c77007319 105 ADC_RegularChannelConfig(adc, ADC_Channel_0, 1, ADC_SampleTime_7Cycles5);
mbed_official 52:a51c77007319 106 break;
mbed_official 52:a51c77007319 107 case PA_1:
mbed_official 52:a51c77007319 108 ADC_RegularChannelConfig(adc, ADC_Channel_1, 1, ADC_SampleTime_7Cycles5);
mbed_official 52:a51c77007319 109 break;
mbed_official 52:a51c77007319 110 case PA_4:
mbed_official 52:a51c77007319 111 ADC_RegularChannelConfig(adc, ADC_Channel_4, 1, ADC_SampleTime_7Cycles5);
mbed_official 52:a51c77007319 112 break;
mbed_official 52:a51c77007319 113 case PB_0:
mbed_official 52:a51c77007319 114 ADC_RegularChannelConfig(adc, ADC_Channel_8, 1, ADC_SampleTime_7Cycles5);
mbed_official 52:a51c77007319 115 break;
mbed_official 52:a51c77007319 116 case PC_1:
mbed_official 52:a51c77007319 117 ADC_RegularChannelConfig(adc, ADC_Channel_11, 1, ADC_SampleTime_7Cycles5);
mbed_official 52:a51c77007319 118 break;
mbed_official 52:a51c77007319 119 case PC_0:
mbed_official 52:a51c77007319 120 ADC_RegularChannelConfig(adc, ADC_Channel_10, 1, ADC_SampleTime_7Cycles5);
mbed_official 52:a51c77007319 121 break;
mbed_official 52:a51c77007319 122 default:
mbed_official 52:a51c77007319 123 return 0;
mbed_official 52:a51c77007319 124 }
mbed_official 52:a51c77007319 125
mbed_official 52:a51c77007319 126 ADC_SoftwareStartConvCmd(adc, ENABLE); // Start conversion
mbed_official 52:a51c77007319 127
mbed_official 52:a51c77007319 128 while(ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion
mbed_official 52:a51c77007319 129
mbed_official 52:a51c77007319 130 return(ADC_GetConversionValue(adc)); // Get conversion value
mbed_official 52:a51c77007319 131 }
mbed_official 52:a51c77007319 132
mbed_official 52:a51c77007319 133 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 52:a51c77007319 134 return(adc_read(obj));
mbed_official 52:a51c77007319 135 }
mbed_official 52:a51c77007319 136
mbed_official 52:a51c77007319 137 float analogin_read(analogin_t *obj) {
mbed_official 52:a51c77007319 138 uint16_t value = adc_read(obj);
mbed_official 52:a51c77007319 139 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 52:a51c77007319 140 }
mbed_official 52:a51c77007319 141
mbed_official 52:a51c77007319 142 #endif