mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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