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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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_DISCO_F100RB/analogin_api.c@268:402bcc0c870b, 2014-07-29 (annotated)

Committer:
mbed_official
Date:
Tue Jul 29 19:00:07 2014 +0100
Revision:
268:402bcc0c870b
Parent:
227:7bd0639b8911
Child:
497:d54623194236
Synchronized with git revision 490d1a6606b3138f165c5edf2f2370ca616587c0



Full URL: https://github.com/mbedmicro/mbed/commit/490d1a6606b3138f165c5edf2f2370ca616587c0/



[LPC1114] Sleep fix + some device.h settings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 126:549ba18ddd81 1 /* mbed Microcontroller Library
mbed_official 126:549ba18ddd81 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 126:549ba18ddd81 3 * All rights reserved.
mbed_official 126:549ba18ddd81 4 *
mbed_official 126:549ba18ddd81 5 * Redistribution and use in source and binary forms, with or without
mbed_official 126:549ba18ddd81 6 * modification, are permitted provided that the following conditions are met:
mbed_official 126:549ba18ddd81 7 *
mbed_official 126:549ba18ddd81 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 126:549ba18ddd81 9 * this list of conditions and the following disclaimer.
mbed_official 126:549ba18ddd81 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 126:549ba18ddd81 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 126:549ba18ddd81 12 * and/or other materials provided with the distribution.
mbed_official 126:549ba18ddd81 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 126:549ba18ddd81 14 * may be used to endorse or promote products derived from this software
mbed_official 126:549ba18ddd81 15 * without specific prior written permission.
mbed_official 126:549ba18ddd81 16 *
mbed_official 126:549ba18ddd81 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 126:549ba18ddd81 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 126:549ba18ddd81 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 126:549ba18ddd81 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 126:549ba18ddd81 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 126:549ba18ddd81 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 126:549ba18ddd81 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 126:549ba18ddd81 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 126:549ba18ddd81 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 126:549ba18ddd81 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 126:549ba18ddd81 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 126:549ba18ddd81 29 #include "analogin_api.h"
mbed_official 126:549ba18ddd81 30 #include "wait_api.h"
mbed_official 126:549ba18ddd81 31
mbed_official 126:549ba18ddd81 32 #if DEVICE_ANALOGIN
mbed_official 126:549ba18ddd81 33
mbed_official 126:549ba18ddd81 34 #include "cmsis.h"
mbed_official 126:549ba18ddd81 35 #include "pinmap.h"
mbed_official 126:549ba18ddd81 36
mbed_official 126:549ba18ddd81 37 static const PinMap PinMap_ADC[] = {
mbed_official 126:549ba18ddd81 38 {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 126:549ba18ddd81 39 {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 126:549ba18ddd81 40 {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 126:549ba18ddd81 41 {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 126:549ba18ddd81 42 {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 126:549ba18ddd81 43 {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AIN, 0)},
mbed_official 126:549ba18ddd81 44 {NC, NC, 0}
mbed_official 126:549ba18ddd81 45 };
mbed_official 126:549ba18ddd81 46
mbed_official 126:549ba18ddd81 47 int adc_inited = 0;
mbed_official 126:549ba18ddd81 48
mbed_official 126:549ba18ddd81 49 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 126:549ba18ddd81 50
mbed_official 126:549ba18ddd81 51 ADC_TypeDef *adc;
mbed_official 126:549ba18ddd81 52 ADC_InitTypeDef ADC_InitStructure;
mbed_official 126:549ba18ddd81 53
mbed_official 126:549ba18ddd81 54 // Get the peripheral name (ADC_1, ADC_2...) from the pin and assign it to the object
mbed_official 126:549ba18ddd81 55 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 227:7bd0639b8911 56 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 126:549ba18ddd81 57
mbed_official 126:549ba18ddd81 58 // Configure GPIO
mbed_official 126:549ba18ddd81 59 pinmap_pinout(pin, PinMap_ADC);
mbed_official 126:549ba18ddd81 60
mbed_official 126:549ba18ddd81 61 // Save pin number for the read function
mbed_official 126:549ba18ddd81 62 obj->pin = pin;
mbed_official 126:549ba18ddd81 63
mbed_official 126:549ba18ddd81 64 // The ADC initialization is done once
mbed_official 126:549ba18ddd81 65 if (adc_inited == 0) {
mbed_official 126:549ba18ddd81 66 adc_inited = 1;
mbed_official 126:549ba18ddd81 67
mbed_official 126:549ba18ddd81 68 // Get ADC registers structure address
mbed_official 126:549ba18ddd81 69 adc = (ADC_TypeDef *)(obj->adc);
mbed_official 126:549ba18ddd81 70
mbed_official 126:549ba18ddd81 71 // Enable ADC clock
mbed_official 126:549ba18ddd81 72 RCC_ADCCLKConfig(RCC_PCLK2_Div4);
mbed_official 126:549ba18ddd81 73 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
mbed_official 126:549ba18ddd81 74
mbed_official 126:549ba18ddd81 75 // Configure ADC
mbed_official 126:549ba18ddd81 76 ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
mbed_official 126:549ba18ddd81 77 ADC_InitStructure.ADC_ScanConvMode = DISABLE;
mbed_official 126:549ba18ddd81 78 ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
mbed_official 126:549ba18ddd81 79 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
mbed_official 126:549ba18ddd81 80 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
mbed_official 126:549ba18ddd81 81 ADC_InitStructure.ADC_NbrOfChannel = 1;
mbed_official 126:549ba18ddd81 82 ADC_Init(adc, &ADC_InitStructure);
mbed_official 126:549ba18ddd81 83
mbed_official 126:549ba18ddd81 84 // Enable ADC
mbed_official 126:549ba18ddd81 85 ADC_Cmd(adc, ENABLE);
mbed_official 126:549ba18ddd81 86
mbed_official 126:549ba18ddd81 87 // Calibrate ADC
mbed_official 126:549ba18ddd81 88 ADC_ResetCalibration(adc);
mbed_official 126:549ba18ddd81 89 while(ADC_GetResetCalibrationStatus(adc));
mbed_official 126:549ba18ddd81 90 ADC_StartCalibration(adc);
mbed_official 227:7bd0639b8911 91 while(ADC_GetCalibrationStatus(adc));
mbed_official 126:549ba18ddd81 92 }
mbed_official 126:549ba18ddd81 93 }
mbed_official 126:549ba18ddd81 94
mbed_official 126:549ba18ddd81 95 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 126:549ba18ddd81 96 // Get ADC registers structure address
mbed_official 126:549ba18ddd81 97 ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc);
mbed_official 126:549ba18ddd81 98
mbed_official 126:549ba18ddd81 99 // Configure ADC channel
mbed_official 126:549ba18ddd81 100 switch (obj->pin) {
mbed_official 126:549ba18ddd81 101 case PA_0:
mbed_official 126:549ba18ddd81 102 ADC_RegularChannelConfig(adc, ADC_Channel_0, 1, ADC_SampleTime_7Cycles5);
mbed_official 126:549ba18ddd81 103 break;
mbed_official 126:549ba18ddd81 104 case PA_1:
mbed_official 126:549ba18ddd81 105 ADC_RegularChannelConfig(adc, ADC_Channel_1, 1, ADC_SampleTime_7Cycles5);
mbed_official 126:549ba18ddd81 106 break;
mbed_official 126:549ba18ddd81 107 case PA_4:
mbed_official 126:549ba18ddd81 108 ADC_RegularChannelConfig(adc, ADC_Channel_4, 1, ADC_SampleTime_7Cycles5);
mbed_official 126:549ba18ddd81 109 break;
mbed_official 126:549ba18ddd81 110 case PB_0:
mbed_official 126:549ba18ddd81 111 ADC_RegularChannelConfig(adc, ADC_Channel_8, 1, ADC_SampleTime_7Cycles5);
mbed_official 126:549ba18ddd81 112 break;
mbed_official 126:549ba18ddd81 113 case PC_1:
mbed_official 126:549ba18ddd81 114 ADC_RegularChannelConfig(adc, ADC_Channel_11, 1, ADC_SampleTime_7Cycles5);
mbed_official 126:549ba18ddd81 115 break;
mbed_official 126:549ba18ddd81 116 case PC_0:
mbed_official 126:549ba18ddd81 117 ADC_RegularChannelConfig(adc, ADC_Channel_10, 1, ADC_SampleTime_7Cycles5);
mbed_official 126:549ba18ddd81 118 break;
mbed_official 126:549ba18ddd81 119 default:
mbed_official 126:549ba18ddd81 120 return 0;
mbed_official 126:549ba18ddd81 121 }
mbed_official 126:549ba18ddd81 122
mbed_official 126:549ba18ddd81 123 ADC_SoftwareStartConvCmd(adc, ENABLE); // Start conversion
mbed_official 126:549ba18ddd81 124
mbed_official 126:549ba18ddd81 125 while(ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion
mbed_official 126:549ba18ddd81 126
mbed_official 126:549ba18ddd81 127 return(ADC_GetConversionValue(adc)); // Get conversion value
mbed_official 126:549ba18ddd81 128 }
mbed_official 126:549ba18ddd81 129
mbed_official 126:549ba18ddd81 130 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 126:549ba18ddd81 131 return(adc_read(obj));
mbed_official 126:549ba18ddd81 132 }
mbed_official 126:549ba18ddd81 133
mbed_official 126:549ba18ddd81 134 float analogin_read(analogin_t *obj) {
mbed_official 126:549ba18ddd81 135 uint16_t value = adc_read(obj);
mbed_official 126:549ba18ddd81 136 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 126:549ba18ddd81 137 }
mbed_official 126:549ba18ddd81 138
mbed_official 126:549ba18ddd81 139 #endif