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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_NUCLEO_L053R8/analogin_api.c@414:4ec4c5b614b0, 2014-11-25 (annotated)

Committer:
mbed_official
Date:
Tue Nov 25 07:15:09 2014 +0000
Revision:
414:4ec4c5b614b0
Parent:
402:09075a3b15e3
Child:
489:119543c9f674
Synchronized with git revision fbc74e874ac089c6cb05add312fb5422be628886



Full URL: https://github.com/mbedmicro/mbed/commit/fbc74e874ac089c6cb05add312fb5422be628886/



Targets: NUCLEOs - Add PeripheralPins files for all nucleo targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 3 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 4 *
mbed_official 181:a4cbdfbbd2f4 5 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 6 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 7 *
mbed_official 181:a4cbdfbbd2f4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 9 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 12 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 14 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 15 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 16 *
mbed_official 181:a4cbdfbbd2f4 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 181:a4cbdfbbd2f4 29 #include "analogin_api.h"
mbed_official 181:a4cbdfbbd2f4 30
mbed_official 181:a4cbdfbbd2f4 31 #if DEVICE_ANALOGIN
mbed_official 181:a4cbdfbbd2f4 32
mbed_official 181:a4cbdfbbd2f4 33 #include "wait_api.h"
mbed_official 181:a4cbdfbbd2f4 34 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 35 #include "pinmap.h"
mbed_official 414:4ec4c5b614b0 36 #include "PeripheralPins.h"
mbed_official 181:a4cbdfbbd2f4 37
mbed_official 181:a4cbdfbbd2f4 38 ADC_HandleTypeDef AdcHandle;
mbed_official 181:a4cbdfbbd2f4 39
mbed_official 181:a4cbdfbbd2f4 40 int adc_inited = 0;
mbed_official 181:a4cbdfbbd2f4 41
mbed_official 402:09075a3b15e3 42 void analogin_init(analogin_t *obj, PinName pin)
mbed_official 402:09075a3b15e3 43 {
mbed_official 181:a4cbdfbbd2f4 44 // Get the peripheral name from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 45 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 227:7bd0639b8911 46 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 181:a4cbdfbbd2f4 47
mbed_official 181:a4cbdfbbd2f4 48 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 49 pinmap_pinout(pin, PinMap_ADC);
mbed_official 181:a4cbdfbbd2f4 50
mbed_official 181:a4cbdfbbd2f4 51 // Save pin number for the read function
mbed_official 181:a4cbdfbbd2f4 52 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 53
mbed_official 181:a4cbdfbbd2f4 54 // The ADC initialization is done once
mbed_official 181:a4cbdfbbd2f4 55 if (adc_inited == 0) {
mbed_official 181:a4cbdfbbd2f4 56 adc_inited = 1;
mbed_official 181:a4cbdfbbd2f4 57
mbed_official 291:bdc8a81aee9a 58 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 291:bdc8a81aee9a 59
mbed_official 181:a4cbdfbbd2f4 60 // Enable ADC clock
mbed_official 181:a4cbdfbbd2f4 61 __ADC1_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 62
mbed_official 181:a4cbdfbbd2f4 63 // Configure ADC
mbed_official 181:a4cbdfbbd2f4 64 AdcHandle.Init.OversamplingMode = DISABLE;
mbed_official 334:c5736b48acaf 65 AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1;
mbed_official 181:a4cbdfbbd2f4 66 AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
mbed_official 334:c5736b48acaf 67 AdcHandle.Init.SamplingTime = ADC_SAMPLETIME_41CYCLES_5;
mbed_official 181:a4cbdfbbd2f4 68 AdcHandle.Init.ScanDirection = ADC_SCAN_DIRECTION_UPWARD;
mbed_official 181:a4cbdfbbd2f4 69 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
mbed_official 181:a4cbdfbbd2f4 70 AdcHandle.Init.ContinuousConvMode = DISABLE;
mbed_official 181:a4cbdfbbd2f4 71 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
mbed_official 181:a4cbdfbbd2f4 72 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 73 AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIG0_T6_TRGO; // Not used here
mbed_official 181:a4cbdfbbd2f4 74 AdcHandle.Init.DMAContinuousRequests = DISABLE;
mbed_official 181:a4cbdfbbd2f4 75 AdcHandle.Init.EOCSelection = EOC_SINGLE_CONV;
mbed_official 334:c5736b48acaf 76 AdcHandle.Init.Overrun = OVR_DATA_OVERWRITTEN;
mbed_official 181:a4cbdfbbd2f4 77 AdcHandle.Init.LowPowerAutoWait = ENABLE;
mbed_official 181:a4cbdfbbd2f4 78 AdcHandle.Init.LowPowerFrequencyMode = DISABLE; // To be enabled only if ADC clock < 2.8 MHz
mbed_official 291:bdc8a81aee9a 79 AdcHandle.Init.LowPowerAutoOff = DISABLE;
mbed_official 181:a4cbdfbbd2f4 80 HAL_ADC_Init(&AdcHandle);
mbed_official 402:09075a3b15e3 81
mbed_official 291:bdc8a81aee9a 82 // Calibration
mbed_official 291:bdc8a81aee9a 83 HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_SINGLE_ENDED);
mbed_official 402:09075a3b15e3 84
mbed_official 291:bdc8a81aee9a 85 __HAL_ADC_ENABLE(&AdcHandle);
mbed_official 181:a4cbdfbbd2f4 86 }
mbed_official 181:a4cbdfbbd2f4 87 }
mbed_official 181:a4cbdfbbd2f4 88
mbed_official 402:09075a3b15e3 89 static inline uint16_t adc_read(analogin_t *obj)
mbed_official 402:09075a3b15e3 90 {
mbed_official 181:a4cbdfbbd2f4 91 ADC_ChannelConfTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 92
mbed_official 181:a4cbdfbbd2f4 93 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 181:a4cbdfbbd2f4 94
mbed_official 181:a4cbdfbbd2f4 95 // Configure ADC channel
mbed_official 181:a4cbdfbbd2f4 96 switch (obj->pin) {
mbed_official 181:a4cbdfbbd2f4 97 case PA_0:
mbed_official 181:a4cbdfbbd2f4 98 sConfig.Channel = ADC_CHANNEL_0;
mbed_official 181:a4cbdfbbd2f4 99 break;
mbed_official 181:a4cbdfbbd2f4 100 case PA_1:
mbed_official 181:a4cbdfbbd2f4 101 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 181:a4cbdfbbd2f4 102 break;
mbed_official 181:a4cbdfbbd2f4 103 case PA_2:
mbed_official 181:a4cbdfbbd2f4 104 sConfig.Channel = ADC_CHANNEL_2;
mbed_official 181:a4cbdfbbd2f4 105 break;
mbed_official 181:a4cbdfbbd2f4 106 case PA_3:
mbed_official 181:a4cbdfbbd2f4 107 sConfig.Channel = ADC_CHANNEL_3;
mbed_official 181:a4cbdfbbd2f4 108 break;
mbed_official 181:a4cbdfbbd2f4 109 case PA_4:
mbed_official 181:a4cbdfbbd2f4 110 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 181:a4cbdfbbd2f4 111 break;
mbed_official 181:a4cbdfbbd2f4 112 case PA_5:
mbed_official 181:a4cbdfbbd2f4 113 sConfig.Channel = ADC_CHANNEL_5;
mbed_official 181:a4cbdfbbd2f4 114 break;
mbed_official 181:a4cbdfbbd2f4 115 case PA_6:
mbed_official 181:a4cbdfbbd2f4 116 sConfig.Channel = ADC_CHANNEL_6;
mbed_official 181:a4cbdfbbd2f4 117 break;
mbed_official 181:a4cbdfbbd2f4 118 case PA_7:
mbed_official 181:a4cbdfbbd2f4 119 sConfig.Channel = ADC_CHANNEL_7;
mbed_official 181:a4cbdfbbd2f4 120 break;
mbed_official 181:a4cbdfbbd2f4 121 case PB_0:
mbed_official 181:a4cbdfbbd2f4 122 sConfig.Channel = ADC_CHANNEL_8;
mbed_official 181:a4cbdfbbd2f4 123 break;
mbed_official 181:a4cbdfbbd2f4 124 case PB_1:
mbed_official 181:a4cbdfbbd2f4 125 sConfig.Channel = ADC_CHANNEL_9;
mbed_official 181:a4cbdfbbd2f4 126 break;
mbed_official 181:a4cbdfbbd2f4 127 case PC_0:
mbed_official 181:a4cbdfbbd2f4 128 sConfig.Channel = ADC_CHANNEL_10;
mbed_official 181:a4cbdfbbd2f4 129 break;
mbed_official 181:a4cbdfbbd2f4 130 case PC_1:
mbed_official 181:a4cbdfbbd2f4 131 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 181:a4cbdfbbd2f4 132 break;
mbed_official 181:a4cbdfbbd2f4 133 case PC_2:
mbed_official 181:a4cbdfbbd2f4 134 sConfig.Channel = ADC_CHANNEL_12;
mbed_official 181:a4cbdfbbd2f4 135 break;
mbed_official 181:a4cbdfbbd2f4 136 case PC_3:
mbed_official 181:a4cbdfbbd2f4 137 sConfig.Channel = ADC_CHANNEL_13;
mbed_official 181:a4cbdfbbd2f4 138 break;
mbed_official 181:a4cbdfbbd2f4 139 case PC_4:
mbed_official 181:a4cbdfbbd2f4 140 sConfig.Channel = ADC_CHANNEL_14;
mbed_official 181:a4cbdfbbd2f4 141 break;
mbed_official 181:a4cbdfbbd2f4 142 case PC_5:
mbed_official 181:a4cbdfbbd2f4 143 sConfig.Channel = ADC_CHANNEL_15;
mbed_official 181:a4cbdfbbd2f4 144 break;
mbed_official 181:a4cbdfbbd2f4 145 default:
mbed_official 181:a4cbdfbbd2f4 146 return 0;
mbed_official 181:a4cbdfbbd2f4 147 }
mbed_official 181:a4cbdfbbd2f4 148
mbed_official 181:a4cbdfbbd2f4 149 ADC1->CHSELR = 0; // [TODO] Workaround. To be removed after Cube driver is corrected.
mbed_official 181:a4cbdfbbd2f4 150 HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
mbed_official 181:a4cbdfbbd2f4 151
mbed_official 181:a4cbdfbbd2f4 152 HAL_ADC_Start(&AdcHandle); // Start conversion
mbed_official 181:a4cbdfbbd2f4 153
mbed_official 181:a4cbdfbbd2f4 154 // Wait end of conversion and get value
mbed_official 181:a4cbdfbbd2f4 155 if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
mbed_official 181:a4cbdfbbd2f4 156 return (HAL_ADC_GetValue(&AdcHandle));
mbed_official 181:a4cbdfbbd2f4 157 } else {
mbed_official 181:a4cbdfbbd2f4 158 return 0;
mbed_official 181:a4cbdfbbd2f4 159 }
mbed_official 181:a4cbdfbbd2f4 160 }
mbed_official 181:a4cbdfbbd2f4 161
mbed_official 402:09075a3b15e3 162 uint16_t analogin_read_u16(analogin_t *obj)
mbed_official 402:09075a3b15e3 163 {
mbed_official 298:7557d401dbc3 164 uint16_t value = adc_read(obj);
mbed_official 298:7557d401dbc3 165 // 12-bit to 16-bit conversion
mbed_official 298:7557d401dbc3 166 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
mbed_official 298:7557d401dbc3 167 return value;
mbed_official 181:a4cbdfbbd2f4 168 }
mbed_official 181:a4cbdfbbd2f4 169
mbed_official 402:09075a3b15e3 170 float analogin_read(analogin_t *obj)
mbed_official 402:09075a3b15e3 171 {
mbed_official 181:a4cbdfbbd2f4 172 uint16_t value = adc_read(obj);
mbed_official 181:a4cbdfbbd2f4 173 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 181:a4cbdfbbd2f4 174 }
mbed_official 181:a4cbdfbbd2f4 175
mbed_official 181:a4cbdfbbd2f4 176 #endif