Sigve Sebastian Farstad / mbed-src

mbed w/ spi bug fig

Dependents:   display-puck

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F051R8/analogin_api.c@240:9a7c54113eaf, 2014-06-26 (annotated)

Committer:
mbed_official
Date:
Thu Jun 26 09:45:08 2014 +0100
Revision:
240:9a7c54113eaf
Parent:
227:7bd0639b8911 
Synchronized with git revision 288cce7281f1f4bd5ab515fff36cdf6090bc4480



Full URL: https://github.com/mbedmicro/mbed/commit/288cce7281f1f4bd5ab515fff36cdf6090bc4480/



[DISCO-F051R8] Updated with F030R8 recent changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 130:1dec54e4aec3 1 /* mbed Microcontroller Library
mbed_official 130:1dec54e4aec3 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 130:1dec54e4aec3 3 * All rights reserved.
mbed_official 130:1dec54e4aec3 4 *
mbed_official 130:1dec54e4aec3 5 * Redistribution and use in source and binary forms, with or without
mbed_official 130:1dec54e4aec3 6 * modification, are permitted provided that the following conditions are met:
mbed_official 130:1dec54e4aec3 7 *
mbed_official 130:1dec54e4aec3 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 130:1dec54e4aec3 9 * this list of conditions and the following disclaimer.
mbed_official 130:1dec54e4aec3 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 130:1dec54e4aec3 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 130:1dec54e4aec3 12 * and/or other materials provided with the distribution.
mbed_official 130:1dec54e4aec3 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 130:1dec54e4aec3 14 * may be used to endorse or promote products derived from this software
mbed_official 130:1dec54e4aec3 15 * without specific prior written permission.
mbed_official 130:1dec54e4aec3 16 *
mbed_official 130:1dec54e4aec3 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 130:1dec54e4aec3 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 130:1dec54e4aec3 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 130:1dec54e4aec3 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 130:1dec54e4aec3 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 130:1dec54e4aec3 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 130:1dec54e4aec3 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 130:1dec54e4aec3 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 130:1dec54e4aec3 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 130:1dec54e4aec3 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 130:1dec54e4aec3 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 130:1dec54e4aec3 29 #include "analogin_api.h"
mbed_official 130:1dec54e4aec3 30
mbed_official 130:1dec54e4aec3 31 #if DEVICE_ANALOGIN
mbed_official 130:1dec54e4aec3 32
mbed_official 130:1dec54e4aec3 33 #include "cmsis.h"
mbed_official 130:1dec54e4aec3 34 #include "pinmap.h"
mbed_official 240:9a7c54113eaf 35 #include "error.h"
mbed_official 240:9a7c54113eaf 36 #include "wait_api.h"
mbed_official 130:1dec54e4aec3 37
mbed_official 130:1dec54e4aec3 38 static const PinMap PinMap_ADC[] = {
mbed_official 130:1dec54e4aec3 39 {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN0
mbed_official 130:1dec54e4aec3 40 {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN1
mbed_official 240:9a7c54113eaf 41 {PA_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN2
mbed_official 240:9a7c54113eaf 42 {PA_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN3
mbed_official 130:1dec54e4aec3 43 {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN4
mbed_official 240:9a7c54113eaf 44 {PA_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN5
mbed_official 240:9a7c54113eaf 45 {PA_6, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN6
mbed_official 240:9a7c54113eaf 46 {PA_7, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN7
mbed_official 130:1dec54e4aec3 47 {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN8
mbed_official 240:9a7c54113eaf 48 {PB_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN9
mbed_official 240:9a7c54113eaf 49 {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN10
mbed_official 130:1dec54e4aec3 50 {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN11
mbed_official 240:9a7c54113eaf 51 {PC_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN12
mbed_official 240:9a7c54113eaf 52 {PC_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN13
mbed_official 240:9a7c54113eaf 53 {PC_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN14
mbed_official 240:9a7c54113eaf 54 {PC_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN15
mbed_official 130:1dec54e4aec3 55 {NC, NC, 0}
mbed_official 130:1dec54e4aec3 56 };
mbed_official 130:1dec54e4aec3 57
mbed_official 130:1dec54e4aec3 58 int adc_inited = 0;
mbed_official 130:1dec54e4aec3 59
mbed_official 130:1dec54e4aec3 60 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 130:1dec54e4aec3 61
mbed_official 130:1dec54e4aec3 62 ADC_TypeDef *adc;
mbed_official 130:1dec54e4aec3 63 ADC_InitTypeDef ADC_InitStructure;
mbed_official 130:1dec54e4aec3 64
mbed_official 130:1dec54e4aec3 65 // Get the peripheral name (ADC_1, ADC_2...) from the pin and assign it to the object
mbed_official 130:1dec54e4aec3 66 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 227:7bd0639b8911 67 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 130:1dec54e4aec3 68
mbed_official 130:1dec54e4aec3 69 // Configure GPIO
mbed_official 130:1dec54e4aec3 70 pinmap_pinout(pin, PinMap_ADC);
mbed_official 130:1dec54e4aec3 71
mbed_official 130:1dec54e4aec3 72 // Save pin number for the read function
mbed_official 130:1dec54e4aec3 73 obj->pin = pin;
mbed_official 130:1dec54e4aec3 74
mbed_official 130:1dec54e4aec3 75 // The ADC initialization is done once
mbed_official 130:1dec54e4aec3 76 if (adc_inited == 0) {
mbed_official 130:1dec54e4aec3 77 adc_inited = 1;
mbed_official 130:1dec54e4aec3 78
mbed_official 130:1dec54e4aec3 79 // Get ADC registers structure address
mbed_official 130:1dec54e4aec3 80 adc = (ADC_TypeDef *)(obj->adc);
mbed_official 130:1dec54e4aec3 81
mbed_official 130:1dec54e4aec3 82 // Enable ADC clock
mbed_official 130:1dec54e4aec3 83 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
mbed_official 130:1dec54e4aec3 84
mbed_official 130:1dec54e4aec3 85 // Configure ADC
mbed_official 130:1dec54e4aec3 86 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
mbed_official 227:7bd0639b8911 87 ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
mbed_official 130:1dec54e4aec3 88 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
mbed_official 130:1dec54e4aec3 89 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_TRGO;
mbed_official 130:1dec54e4aec3 90 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
mbed_official 130:1dec54e4aec3 91 ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
mbed_official 130:1dec54e4aec3 92 ADC_Init(adc, &ADC_InitStructure);
mbed_official 130:1dec54e4aec3 93
mbed_official 130:1dec54e4aec3 94 // Calibrate ADC
mbed_official 130:1dec54e4aec3 95 ADC_GetCalibrationFactor(adc);
mbed_official 130:1dec54e4aec3 96
mbed_official 130:1dec54e4aec3 97 // Enable ADC
mbed_official 130:1dec54e4aec3 98 ADC_Cmd(adc, ENABLE);
mbed_official 130:1dec54e4aec3 99 }
mbed_official 130:1dec54e4aec3 100 }
mbed_official 130:1dec54e4aec3 101
mbed_official 130:1dec54e4aec3 102 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 130:1dec54e4aec3 103 // Get ADC registers structure address
mbed_official 130:1dec54e4aec3 104 ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc);
mbed_official 130:1dec54e4aec3 105
mbed_official 130:1dec54e4aec3 106 adc->CHSELR = 0; // Clear all channels first
mbed_official 130:1dec54e4aec3 107
mbed_official 130:1dec54e4aec3 108 // Configure ADC channel
mbed_official 130:1dec54e4aec3 109 switch (obj->pin) {
mbed_official 130:1dec54e4aec3 110 case PA_0:
mbed_official 130:1dec54e4aec3 111 ADC_ChannelConfig(adc, ADC_Channel_0, ADC_SampleTime_7_5Cycles);
mbed_official 130:1dec54e4aec3 112 break;
mbed_official 130:1dec54e4aec3 113 case PA_1:
mbed_official 130:1dec54e4aec3 114 ADC_ChannelConfig(adc, ADC_Channel_1, ADC_SampleTime_7_5Cycles);
mbed_official 130:1dec54e4aec3 115 break;
mbed_official 240:9a7c54113eaf 116 case PA_2:
mbed_official 240:9a7c54113eaf 117 ADC_ChannelConfig(adc, ADC_Channel_2, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 118 break;
mbed_official 240:9a7c54113eaf 119 case PA_3:
mbed_official 240:9a7c54113eaf 120 ADC_ChannelConfig(adc, ADC_Channel_3, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 121 break;
mbed_official 130:1dec54e4aec3 122 case PA_4:
mbed_official 130:1dec54e4aec3 123 ADC_ChannelConfig(adc, ADC_Channel_4, ADC_SampleTime_7_5Cycles);
mbed_official 130:1dec54e4aec3 124 break;
mbed_official 240:9a7c54113eaf 125 case PA_5:
mbed_official 240:9a7c54113eaf 126 ADC_ChannelConfig(adc, ADC_Channel_5, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 127 break;
mbed_official 240:9a7c54113eaf 128 case PA_6:
mbed_official 240:9a7c54113eaf 129 ADC_ChannelConfig(adc, ADC_Channel_6, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 130 break;
mbed_official 240:9a7c54113eaf 131 case PA_7:
mbed_official 240:9a7c54113eaf 132 ADC_ChannelConfig(adc, ADC_Channel_7, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 133 break;
mbed_official 130:1dec54e4aec3 134 case PB_0:
mbed_official 130:1dec54e4aec3 135 ADC_ChannelConfig(adc, ADC_Channel_8, ADC_SampleTime_7_5Cycles);
mbed_official 130:1dec54e4aec3 136 break;
mbed_official 240:9a7c54113eaf 137 case PB_1:
mbed_official 240:9a7c54113eaf 138 ADC_ChannelConfig(adc, ADC_Channel_9, ADC_SampleTime_7_5Cycles);
mbed_official 130:1dec54e4aec3 139 break;
mbed_official 130:1dec54e4aec3 140 case PC_0:
mbed_official 130:1dec54e4aec3 141 ADC_ChannelConfig(adc, ADC_Channel_10, ADC_SampleTime_7_5Cycles);
mbed_official 130:1dec54e4aec3 142 break;
mbed_official 240:9a7c54113eaf 143 case PC_1:
mbed_official 240:9a7c54113eaf 144 ADC_ChannelConfig(adc, ADC_Channel_11, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 145 break;
mbed_official 240:9a7c54113eaf 146 case PC_2:
mbed_official 240:9a7c54113eaf 147 ADC_ChannelConfig(adc, ADC_Channel_12, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 148 break;
mbed_official 240:9a7c54113eaf 149 case PC_3:
mbed_official 240:9a7c54113eaf 150 ADC_ChannelConfig(adc, ADC_Channel_13, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 151 break;
mbed_official 240:9a7c54113eaf 152 case PC_4:
mbed_official 240:9a7c54113eaf 153 ADC_ChannelConfig(adc, ADC_Channel_14, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 154 break;
mbed_official 240:9a7c54113eaf 155 case PC_5:
mbed_official 240:9a7c54113eaf 156 ADC_ChannelConfig(adc, ADC_Channel_15, ADC_SampleTime_7_5Cycles);
mbed_official 240:9a7c54113eaf 157 break;
mbed_official 130:1dec54e4aec3 158 default:
mbed_official 130:1dec54e4aec3 159 return 0;
mbed_official 130:1dec54e4aec3 160 }
mbed_official 130:1dec54e4aec3 161
mbed_official 240:9a7c54113eaf 162 while (!ADC_GetFlagStatus(adc, ADC_FLAG_ADRDY)); // Wait ADC ready
mbed_official 130:1dec54e4aec3 163
mbed_official 130:1dec54e4aec3 164 ADC_StartOfConversion(adc); // Start conversion
mbed_official 130:1dec54e4aec3 165
mbed_official 240:9a7c54113eaf 166 while (ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion
mbed_official 130:1dec54e4aec3 167
mbed_official 240:9a7c54113eaf 168 return (ADC_GetConversionValue(adc)); // Get conversion value
mbed_official 130:1dec54e4aec3 169 }
mbed_official 130:1dec54e4aec3 170
mbed_official 130:1dec54e4aec3 171 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 240:9a7c54113eaf 172 return (adc_read(obj));
mbed_official 130:1dec54e4aec3 173 }
mbed_official 130:1dec54e4aec3 174
mbed_official 130:1dec54e4aec3 175 float analogin_read(analogin_t *obj) {
mbed_official 130:1dec54e4aec3 176 uint16_t value = adc_read(obj);
mbed_official 130:1dec54e4aec3 177 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 130:1dec54e4aec3 178 }
mbed_official 130:1dec54e4aec3 179
mbed_official 130:1dec54e4aec3 180 #endif