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_F401RE/analogin_api.c@87:085cde657901, 2014-02-08 (annotated)

Committer:
mbed_official
Date:
Sat Feb 08 19:45:06 2014 +0000
Revision:
87:085cde657901
Child:
125:23cc3068a9e4
Synchronized with git revision 9272cdeb45ec7e6077641536509413da8fd2ebc2



Full URL: https://github.com/mbedmicro/mbed/commit/9272cdeb45ec7e6077641536509413da8fd2ebc2/



Add NUCLEO_F401RE, improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /* mbed Microcontroller Library
mbed_official 87:085cde657901 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 87:085cde657901 3 * All rights reserved.
mbed_official 87:085cde657901 4 *
mbed_official 87:085cde657901 5 * Redistribution and use in source and binary forms, with or without
mbed_official 87:085cde657901 6 * modification, are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 7 *
mbed_official 87:085cde657901 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 9 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 12 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 14 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 15 * without specific prior written permission.
mbed_official 87:085cde657901 16 *
mbed_official 87:085cde657901 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 27 */
mbed_official 87:085cde657901 28 #include "analogin_api.h"
mbed_official 87:085cde657901 29 #include "wait_api.h"
mbed_official 87:085cde657901 30
mbed_official 87:085cde657901 31 #if DEVICE_ANALOGIN
mbed_official 87:085cde657901 32
mbed_official 87:085cde657901 33 #include "cmsis.h"
mbed_official 87:085cde657901 34 #include "pinmap.h"
mbed_official 87:085cde657901 35 #include "error.h"
mbed_official 87:085cde657901 36 #include "stm32f4xx_hal.h"
mbed_official 87:085cde657901 37
mbed_official 87:085cde657901 38 static const PinMap PinMap_ADC[] = {
mbed_official 87:085cde657901 39 {PA_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN0
mbed_official 87:085cde657901 40 {PA_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN1
mbed_official 87:085cde657901 41 {PA_4, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN4
mbed_official 87:085cde657901 42 {PB_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN8
mbed_official 87:085cde657901 43 {PC_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN11
mbed_official 87:085cde657901 44 {PC_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN10
mbed_official 87:085cde657901 45 {NC, NC, 0}
mbed_official 87:085cde657901 46 };
mbed_official 87:085cde657901 47
mbed_official 87:085cde657901 48 ADC_HandleTypeDef AdcHandle;
mbed_official 87:085cde657901 49
mbed_official 87:085cde657901 50 int adc_inited = 0;
mbed_official 87:085cde657901 51
mbed_official 87:085cde657901 52 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 87:085cde657901 53 // Get the peripheral name (ADC_1, ADC_2...) from the pin and assign it to the object
mbed_official 87:085cde657901 54 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 87:085cde657901 55
mbed_official 87:085cde657901 56 if (obj->adc == (ADCName)NC) {
mbed_official 87:085cde657901 57 error("ADC error: pinout mapping failed.");
mbed_official 87:085cde657901 58 }
mbed_official 87:085cde657901 59
mbed_official 87:085cde657901 60 // Configure GPIO
mbed_official 87:085cde657901 61 pinmap_pinout(pin, PinMap_ADC);
mbed_official 87:085cde657901 62
mbed_official 87:085cde657901 63 // Save pin number for the read function
mbed_official 87:085cde657901 64 obj->pin = pin;
mbed_official 87:085cde657901 65
mbed_official 87:085cde657901 66 // The ADC initialization is done once
mbed_official 87:085cde657901 67 if (adc_inited == 0) {
mbed_official 87:085cde657901 68 adc_inited = 1;
mbed_official 87:085cde657901 69
mbed_official 87:085cde657901 70 // Enable ADC clock
mbed_official 87:085cde657901 71 __ADC1_CLK_ENABLE();
mbed_official 87:085cde657901 72
mbed_official 87:085cde657901 73 // Configure ADC
mbed_official 87:085cde657901 74 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 87:085cde657901 75 AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
mbed_official 87:085cde657901 76 AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
mbed_official 87:085cde657901 77 AdcHandle.Init.ScanConvMode = DISABLE;
mbed_official 87:085cde657901 78 AdcHandle.Init.ContinuousConvMode = DISABLE;
mbed_official 87:085cde657901 79 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
mbed_official 87:085cde657901 80 AdcHandle.Init.NbrOfDiscConversion = 0;
mbed_official 87:085cde657901 81 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
mbed_official 87:085cde657901 82 AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
mbed_official 87:085cde657901 83 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
mbed_official 87:085cde657901 84 AdcHandle.Init.NbrOfConversion = 1;
mbed_official 87:085cde657901 85 AdcHandle.Init.DMAContinuousRequests = DISABLE;
mbed_official 87:085cde657901 86 AdcHandle.Init.EOCSelection = DISABLE;
mbed_official 87:085cde657901 87 HAL_ADC_Init(&AdcHandle);
mbed_official 87:085cde657901 88 }
mbed_official 87:085cde657901 89 }
mbed_official 87:085cde657901 90
mbed_official 87:085cde657901 91 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 87:085cde657901 92 ADC_ChannelConfTypeDef sConfig;
mbed_official 87:085cde657901 93
mbed_official 87:085cde657901 94 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 87:085cde657901 95
mbed_official 87:085cde657901 96 // Configure ADC channel
mbed_official 87:085cde657901 97 sConfig.Rank = 1;
mbed_official 87:085cde657901 98 sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
mbed_official 87:085cde657901 99 sConfig.Offset = 0;
mbed_official 87:085cde657901 100
mbed_official 87:085cde657901 101 switch (obj->pin) {
mbed_official 87:085cde657901 102 case PA_0:
mbed_official 87:085cde657901 103 sConfig.Channel = ADC_CHANNEL_0;
mbed_official 87:085cde657901 104 break;
mbed_official 87:085cde657901 105 case PA_1:
mbed_official 87:085cde657901 106 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 87:085cde657901 107 break;
mbed_official 87:085cde657901 108 case PA_4:
mbed_official 87:085cde657901 109 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 87:085cde657901 110 break;
mbed_official 87:085cde657901 111 case PB_0:
mbed_official 87:085cde657901 112 sConfig.Channel = ADC_CHANNEL_8;
mbed_official 87:085cde657901 113 break;
mbed_official 87:085cde657901 114 case PC_1:
mbed_official 87:085cde657901 115 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 87:085cde657901 116 break;
mbed_official 87:085cde657901 117 case PC_0:
mbed_official 87:085cde657901 118 sConfig.Channel = ADC_CHANNEL_10;
mbed_official 87:085cde657901 119 break;
mbed_official 87:085cde657901 120 default:
mbed_official 87:085cde657901 121 return 0;
mbed_official 87:085cde657901 122 }
mbed_official 87:085cde657901 123
mbed_official 87:085cde657901 124 HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
mbed_official 87:085cde657901 125
mbed_official 87:085cde657901 126 HAL_ADC_Start(&AdcHandle); // Start conversion
mbed_official 87:085cde657901 127
mbed_official 87:085cde657901 128 HAL_ADC_PollForConversion(&AdcHandle, 10); // Wait end of conversion
mbed_official 87:085cde657901 129
mbed_official 87:085cde657901 130 if (HAL_ADC_GetState(&AdcHandle) == HAL_ADC_STATE_EOC_REG)
mbed_official 87:085cde657901 131 {
mbed_official 87:085cde657901 132 return(HAL_ADC_GetValue(&AdcHandle)); // Get conversion value
mbed_official 87:085cde657901 133 }
mbed_official 87:085cde657901 134 else
mbed_official 87:085cde657901 135 {
mbed_official 87:085cde657901 136 return 0;
mbed_official 87:085cde657901 137 }
mbed_official 87:085cde657901 138 }
mbed_official 87:085cde657901 139
mbed_official 87:085cde657901 140 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 87:085cde657901 141 return(adc_read(obj));
mbed_official 87:085cde657901 142 }
mbed_official 87:085cde657901 143
mbed_official 87:085cde657901 144 float analogin_read(analogin_t *obj) {
mbed_official 87:085cde657901 145 uint16_t value = adc_read(obj);
mbed_official 87:085cde657901 146 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 87:085cde657901 147 }
mbed_official 87:085cde657901 148
mbed_official 87:085cde657901 149 #endif