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_F030R8/analogin_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
227:7bd0639b8911
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 3 * All rights reserved.
mbed_official 76:aeb1df146756 4 *
mbed_official 76:aeb1df146756 5 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 6 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 7 *
mbed_official 76:aeb1df146756 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 9 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 12 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 14 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 15 * without specific prior written permission.
mbed_official 76:aeb1df146756 16 *
mbed_official 76:aeb1df146756 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 76:aeb1df146756 29 #include "analogin_api.h"
mbed_official 76:aeb1df146756 30
mbed_official 76:aeb1df146756 31 #if DEVICE_ANALOGIN
mbed_official 76:aeb1df146756 32
mbed_official 76:aeb1df146756 33 #include "cmsis.h"
mbed_official 76:aeb1df146756 34 #include "pinmap.h"
mbed_official 250:a49055e7a707 35 #include "mbed_error.h"
mbed_official 166:cb4253f91ada 36 #include "wait_api.h"
mbed_official 76:aeb1df146756 37
mbed_official 76:aeb1df146756 38 static const PinMap PinMap_ADC[] = {
mbed_official 76:aeb1df146756 39 {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN0
mbed_official 76:aeb1df146756 40 {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN1
mbed_official 171:3d240fda1f07 41 {PA_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN2
mbed_official 171:3d240fda1f07 42 {PA_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN3
mbed_official 76:aeb1df146756 43 {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN4
mbed_official 171:3d240fda1f07 44 {PA_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN5
mbed_official 171:3d240fda1f07 45 {PA_6, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN6
mbed_official 171:3d240fda1f07 46 {PA_7, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN7
mbed_official 76:aeb1df146756 47 {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN8
mbed_official 171:3d240fda1f07 48 {PB_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN9
mbed_official 171:3d240fda1f07 49 {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN10
mbed_official 76:aeb1df146756 50 {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN11
mbed_official 171:3d240fda1f07 51 {PC_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN12
mbed_official 171:3d240fda1f07 52 {PC_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN13
mbed_official 171:3d240fda1f07 53 {PC_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN14
mbed_official 171:3d240fda1f07 54 {PC_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN15
mbed_official 76:aeb1df146756 55 {NC, NC, 0}
mbed_official 76:aeb1df146756 56 };
mbed_official 76:aeb1df146756 57
mbed_official 76:aeb1df146756 58 int adc_inited = 0;
mbed_official 76:aeb1df146756 59
mbed_official 76:aeb1df146756 60 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 216:577900467c9e 61
mbed_official 76:aeb1df146756 62 ADC_TypeDef *adc;
mbed_official 76:aeb1df146756 63 ADC_InitTypeDef ADC_InitStructure;
mbed_official 216:577900467c9e 64
mbed_official 76:aeb1df146756 65 // Get the peripheral name (ADC_1, ADC_2...) from the pin and assign it to the object
mbed_official 76:aeb1df146756 66 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 227:7bd0639b8911 67 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 76:aeb1df146756 68
mbed_official 76:aeb1df146756 69 // Configure GPIO
mbed_official 76:aeb1df146756 70 pinmap_pinout(pin, PinMap_ADC);
mbed_official 76:aeb1df146756 71
mbed_official 76:aeb1df146756 72 // Save pin number for the read function
mbed_official 76:aeb1df146756 73 obj->pin = pin;
mbed_official 76:aeb1df146756 74
mbed_official 76:aeb1df146756 75 // The ADC initialization is done once
mbed_official 76:aeb1df146756 76 if (adc_inited == 0) {
mbed_official 76:aeb1df146756 77 adc_inited = 1;
mbed_official 76:aeb1df146756 78
mbed_official 76:aeb1df146756 79 // Get ADC registers structure address
mbed_official 76:aeb1df146756 80 adc = (ADC_TypeDef *)(obj->adc);
mbed_official 216:577900467c9e 81
mbed_official 76:aeb1df146756 82 // Enable ADC clock
mbed_official 76:aeb1df146756 83 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
mbed_official 216:577900467c9e 84
mbed_official 76:aeb1df146756 85 // Configure ADC
mbed_official 76:aeb1df146756 86 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
mbed_official 216:577900467c9e 87 ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
mbed_official 76:aeb1df146756 88 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
mbed_official 76:aeb1df146756 89 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_TRGO;
mbed_official 76:aeb1df146756 90 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
mbed_official 76:aeb1df146756 91 ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
mbed_official 76:aeb1df146756 92 ADC_Init(adc, &ADC_InitStructure);
mbed_official 76:aeb1df146756 93
mbed_official 76:aeb1df146756 94 // Calibrate ADC
mbed_official 76:aeb1df146756 95 ADC_GetCalibrationFactor(adc);
mbed_official 76:aeb1df146756 96
mbed_official 76:aeb1df146756 97 // Enable ADC
mbed_official 76:aeb1df146756 98 ADC_Cmd(adc, ENABLE);
mbed_official 76:aeb1df146756 99 }
mbed_official 76:aeb1df146756 100 }
mbed_official 76:aeb1df146756 101
mbed_official 76:aeb1df146756 102 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 216:577900467c9e 103 // Get ADC registers structure address
mbed_official 216:577900467c9e 104 ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc);
mbed_official 216:577900467c9e 105
mbed_official 216:577900467c9e 106 adc->CHSELR = 0; // Clear all channels first
mbed_official 76:aeb1df146756 107
mbed_official 216:577900467c9e 108 // Configure ADC channel
mbed_official 216:577900467c9e 109 switch (obj->pin) {
mbed_official 216:577900467c9e 110 case PA_0:
mbed_official 216:577900467c9e 111 ADC_ChannelConfig(adc, ADC_Channel_0, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 112 break;
mbed_official 216:577900467c9e 113 case PA_1:
mbed_official 216:577900467c9e 114 ADC_ChannelConfig(adc, ADC_Channel_1, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 115 break;
mbed_official 216:577900467c9e 116 case PA_2:
mbed_official 216:577900467c9e 117 ADC_ChannelConfig(adc, ADC_Channel_2, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 118 break;
mbed_official 216:577900467c9e 119 case PA_3:
mbed_official 216:577900467c9e 120 ADC_ChannelConfig(adc, ADC_Channel_3, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 121 break;
mbed_official 216:577900467c9e 122 case PA_4:
mbed_official 216:577900467c9e 123 ADC_ChannelConfig(adc, ADC_Channel_4, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 124 break;
mbed_official 216:577900467c9e 125 case PA_5:
mbed_official 216:577900467c9e 126 ADC_ChannelConfig(adc, ADC_Channel_5, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 127 break;
mbed_official 216:577900467c9e 128 case PA_6:
mbed_official 216:577900467c9e 129 ADC_ChannelConfig(adc, ADC_Channel_6, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 130 break;
mbed_official 216:577900467c9e 131 case PA_7:
mbed_official 216:577900467c9e 132 ADC_ChannelConfig(adc, ADC_Channel_7, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 133 break;
mbed_official 216:577900467c9e 134 case PB_0:
mbed_official 216:577900467c9e 135 ADC_ChannelConfig(adc, ADC_Channel_8, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 136 break;
mbed_official 216:577900467c9e 137 case PB_1:
mbed_official 216:577900467c9e 138 ADC_ChannelConfig(adc, ADC_Channel_9, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 139 break;
mbed_official 216:577900467c9e 140 case PC_0:
mbed_official 216:577900467c9e 141 ADC_ChannelConfig(adc, ADC_Channel_10, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 142 break;
mbed_official 216:577900467c9e 143 case PC_1:
mbed_official 216:577900467c9e 144 ADC_ChannelConfig(adc, ADC_Channel_11, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 145 break;
mbed_official 216:577900467c9e 146 case PC_2:
mbed_official 216:577900467c9e 147 ADC_ChannelConfig(adc, ADC_Channel_12, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 148 break;
mbed_official 216:577900467c9e 149 case PC_3:
mbed_official 216:577900467c9e 150 ADC_ChannelConfig(adc, ADC_Channel_13, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 151 break;
mbed_official 216:577900467c9e 152 case PC_4:
mbed_official 216:577900467c9e 153 ADC_ChannelConfig(adc, ADC_Channel_14, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 154 break;
mbed_official 216:577900467c9e 155 case PC_5:
mbed_official 216:577900467c9e 156 ADC_ChannelConfig(adc, ADC_Channel_15, ADC_SampleTime_7_5Cycles);
mbed_official 216:577900467c9e 157 break;
mbed_official 216:577900467c9e 158 default:
mbed_official 216:577900467c9e 159 return 0;
mbed_official 216:577900467c9e 160 }
mbed_official 77:b5886236e6f0 161
mbed_official 216:577900467c9e 162 while (!ADC_GetFlagStatus(adc, ADC_FLAG_ADRDY)); // Wait ADC ready
mbed_official 216:577900467c9e 163
mbed_official 216:577900467c9e 164 ADC_StartOfConversion(adc); // Start conversion
mbed_official 216:577900467c9e 165
mbed_official 216:577900467c9e 166 while (ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion
mbed_official 216:577900467c9e 167
mbed_official 216:577900467c9e 168 return (ADC_GetConversionValue(adc)); // Get conversion value
mbed_official 76:aeb1df146756 169 }
mbed_official 76:aeb1df146756 170
mbed_official 76:aeb1df146756 171 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 216:577900467c9e 172 return (adc_read(obj));
mbed_official 76:aeb1df146756 173 }
mbed_official 76:aeb1df146756 174
mbed_official 76:aeb1df146756 175 float analogin_read(analogin_t *obj) {
mbed_official 216:577900467c9e 176 uint16_t value = adc_read(obj);
mbed_official 216:577900467c9e 177 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 76:aeb1df146756 178 }
mbed_official 76:aeb1df146756 179
mbed_official 76:aeb1df146756 180 #endif