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targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogin_api.c@291:bdc8a81aee9a, 2014-08-20 (annotated)

Committer:
mbed_official
Date:
Wed Aug 20 17:00:07 2014 +0100
Revision:
291:bdc8a81aee9a
Parent:
227:7bd0639b8911
Child:
298:7557d401dbc3
Synchronized with git revision c73b091a6e275d3b142b08dc40dec547d80499cf



Full URL: https://github.com/mbedmicro/mbed/commit/c73b091a6e275d3b142b08dc40dec547d80499cf/



[NUCLEO_L053R8] Fix bug and improvement of AnalogIn

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 181:a4cbdfbbd2f4 36
mbed_official 181:a4cbdfbbd2f4 37 static const PinMap PinMap_ADC[] = {
mbed_official 181:a4cbdfbbd2f4 38 {PA_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN0
mbed_official 181:a4cbdfbbd2f4 39 {PA_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN1
mbed_official 181:a4cbdfbbd2f4 40 {PA_2, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN2
mbed_official 181:a4cbdfbbd2f4 41 {PA_3, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN3
mbed_official 181:a4cbdfbbd2f4 42 {PA_4, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN4
mbed_official 181:a4cbdfbbd2f4 43 {PA_5, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN5
mbed_official 181:a4cbdfbbd2f4 44 {PA_6, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN6
mbed_official 181:a4cbdfbbd2f4 45 {PA_7, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN7
mbed_official 181:a4cbdfbbd2f4 46 {PB_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN8
mbed_official 181:a4cbdfbbd2f4 47 {PB_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN9
mbed_official 181:a4cbdfbbd2f4 48 {PC_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN10
mbed_official 181:a4cbdfbbd2f4 49 {PC_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN11
mbed_official 181:a4cbdfbbd2f4 50 {PC_2, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN12
mbed_official 181:a4cbdfbbd2f4 51 {PC_3, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN13
mbed_official 181:a4cbdfbbd2f4 52 {PC_4, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN14
mbed_official 181:a4cbdfbbd2f4 53 {PC_5, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN15
mbed_official 181:a4cbdfbbd2f4 54 {NC, NC, 0}
mbed_official 181:a4cbdfbbd2f4 55 };
mbed_official 181:a4cbdfbbd2f4 56
mbed_official 181:a4cbdfbbd2f4 57 ADC_HandleTypeDef AdcHandle;
mbed_official 181:a4cbdfbbd2f4 58
mbed_official 181:a4cbdfbbd2f4 59 int adc_inited = 0;
mbed_official 181:a4cbdfbbd2f4 60
mbed_official 181:a4cbdfbbd2f4 61 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 181:a4cbdfbbd2f4 62 // Get the peripheral name from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 63 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 227:7bd0639b8911 64 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 181:a4cbdfbbd2f4 65
mbed_official 181:a4cbdfbbd2f4 66 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 67 pinmap_pinout(pin, PinMap_ADC);
mbed_official 181:a4cbdfbbd2f4 68
mbed_official 181:a4cbdfbbd2f4 69 // Save pin number for the read function
mbed_official 181:a4cbdfbbd2f4 70 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 71
mbed_official 181:a4cbdfbbd2f4 72 // The ADC initialization is done once
mbed_official 181:a4cbdfbbd2f4 73 if (adc_inited == 0) {
mbed_official 181:a4cbdfbbd2f4 74 adc_inited = 1;
mbed_official 181:a4cbdfbbd2f4 75
mbed_official 291:bdc8a81aee9a 76 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 291:bdc8a81aee9a 77
mbed_official 181:a4cbdfbbd2f4 78 // Enable ADC clock
mbed_official 181:a4cbdfbbd2f4 79 __ADC1_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 80
mbed_official 181:a4cbdfbbd2f4 81 // Configure ADC
mbed_official 181:a4cbdfbbd2f4 82 AdcHandle.Init.OversamplingMode = DISABLE;
mbed_official 181:a4cbdfbbd2f4 83 AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2; // ADCCLK = 8 MHz (HSI 16 MHz / 2)
mbed_official 181:a4cbdfbbd2f4 84 AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
mbed_official 291:bdc8a81aee9a 85 AdcHandle.Init.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
mbed_official 181:a4cbdfbbd2f4 86 AdcHandle.Init.ScanDirection = ADC_SCAN_DIRECTION_UPWARD;
mbed_official 181:a4cbdfbbd2f4 87 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
mbed_official 181:a4cbdfbbd2f4 88 AdcHandle.Init.ContinuousConvMode = DISABLE;
mbed_official 181:a4cbdfbbd2f4 89 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
mbed_official 181:a4cbdfbbd2f4 90 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
mbed_official 181:a4cbdfbbd2f4 91 AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIG0_T6_TRGO; // Not used here
mbed_official 181:a4cbdfbbd2f4 92 AdcHandle.Init.DMAContinuousRequests = DISABLE;
mbed_official 181:a4cbdfbbd2f4 93 AdcHandle.Init.EOCSelection = EOC_SINGLE_CONV;
mbed_official 181:a4cbdfbbd2f4 94 AdcHandle.Init.Overrun = OVR_DATA_PRESERVED;
mbed_official 181:a4cbdfbbd2f4 95 AdcHandle.Init.LowPowerAutoWait = ENABLE;
mbed_official 181:a4cbdfbbd2f4 96 AdcHandle.Init.LowPowerFrequencyMode = DISABLE; // To be enabled only if ADC clock < 2.8 MHz
mbed_official 291:bdc8a81aee9a 97 AdcHandle.Init.LowPowerAutoOff = DISABLE;
mbed_official 181:a4cbdfbbd2f4 98 HAL_ADC_Init(&AdcHandle);
mbed_official 291:bdc8a81aee9a 99
mbed_official 291:bdc8a81aee9a 100 // Calibration
mbed_official 291:bdc8a81aee9a 101 HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_SINGLE_ENDED);
mbed_official 291:bdc8a81aee9a 102
mbed_official 291:bdc8a81aee9a 103 __HAL_ADC_ENABLE(&AdcHandle);
mbed_official 181:a4cbdfbbd2f4 104 }
mbed_official 181:a4cbdfbbd2f4 105 }
mbed_official 181:a4cbdfbbd2f4 106
mbed_official 181:a4cbdfbbd2f4 107 static inline uint16_t adc_read(analogin_t *obj) {
mbed_official 181:a4cbdfbbd2f4 108 ADC_ChannelConfTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 109
mbed_official 181:a4cbdfbbd2f4 110 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 181:a4cbdfbbd2f4 111
mbed_official 181:a4cbdfbbd2f4 112 // Configure ADC channel
mbed_official 181:a4cbdfbbd2f4 113 switch (obj->pin) {
mbed_official 181:a4cbdfbbd2f4 114 case PA_0:
mbed_official 181:a4cbdfbbd2f4 115 sConfig.Channel = ADC_CHANNEL_0;
mbed_official 181:a4cbdfbbd2f4 116 break;
mbed_official 181:a4cbdfbbd2f4 117 case PA_1:
mbed_official 181:a4cbdfbbd2f4 118 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 181:a4cbdfbbd2f4 119 break;
mbed_official 181:a4cbdfbbd2f4 120 case PA_2:
mbed_official 181:a4cbdfbbd2f4 121 sConfig.Channel = ADC_CHANNEL_2;
mbed_official 181:a4cbdfbbd2f4 122 break;
mbed_official 181:a4cbdfbbd2f4 123 case PA_3:
mbed_official 181:a4cbdfbbd2f4 124 sConfig.Channel = ADC_CHANNEL_3;
mbed_official 181:a4cbdfbbd2f4 125 break;
mbed_official 181:a4cbdfbbd2f4 126 case PA_4:
mbed_official 181:a4cbdfbbd2f4 127 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 181:a4cbdfbbd2f4 128 break;
mbed_official 181:a4cbdfbbd2f4 129 case PA_5:
mbed_official 181:a4cbdfbbd2f4 130 sConfig.Channel = ADC_CHANNEL_5;
mbed_official 181:a4cbdfbbd2f4 131 break;
mbed_official 181:a4cbdfbbd2f4 132 case PA_6:
mbed_official 181:a4cbdfbbd2f4 133 sConfig.Channel = ADC_CHANNEL_6;
mbed_official 181:a4cbdfbbd2f4 134 break;
mbed_official 181:a4cbdfbbd2f4 135 case PA_7:
mbed_official 181:a4cbdfbbd2f4 136 sConfig.Channel = ADC_CHANNEL_7;
mbed_official 181:a4cbdfbbd2f4 137 break;
mbed_official 181:a4cbdfbbd2f4 138 case PB_0:
mbed_official 181:a4cbdfbbd2f4 139 sConfig.Channel = ADC_CHANNEL_8;
mbed_official 181:a4cbdfbbd2f4 140 break;
mbed_official 181:a4cbdfbbd2f4 141 case PB_1:
mbed_official 181:a4cbdfbbd2f4 142 sConfig.Channel = ADC_CHANNEL_9;
mbed_official 181:a4cbdfbbd2f4 143 break;
mbed_official 181:a4cbdfbbd2f4 144 case PC_0:
mbed_official 181:a4cbdfbbd2f4 145 sConfig.Channel = ADC_CHANNEL_10;
mbed_official 181:a4cbdfbbd2f4 146 break;
mbed_official 181:a4cbdfbbd2f4 147 case PC_1:
mbed_official 181:a4cbdfbbd2f4 148 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 181:a4cbdfbbd2f4 149 break;
mbed_official 181:a4cbdfbbd2f4 150 case PC_2:
mbed_official 181:a4cbdfbbd2f4 151 sConfig.Channel = ADC_CHANNEL_12;
mbed_official 181:a4cbdfbbd2f4 152 break;
mbed_official 181:a4cbdfbbd2f4 153 case PC_3:
mbed_official 181:a4cbdfbbd2f4 154 sConfig.Channel = ADC_CHANNEL_13;
mbed_official 181:a4cbdfbbd2f4 155 break;
mbed_official 181:a4cbdfbbd2f4 156 case PC_4:
mbed_official 181:a4cbdfbbd2f4 157 sConfig.Channel = ADC_CHANNEL_14;
mbed_official 181:a4cbdfbbd2f4 158 break;
mbed_official 181:a4cbdfbbd2f4 159 case PC_5:
mbed_official 181:a4cbdfbbd2f4 160 sConfig.Channel = ADC_CHANNEL_15;
mbed_official 181:a4cbdfbbd2f4 161 break;
mbed_official 181:a4cbdfbbd2f4 162 default:
mbed_official 181:a4cbdfbbd2f4 163 return 0;
mbed_official 181:a4cbdfbbd2f4 164 }
mbed_official 181:a4cbdfbbd2f4 165
mbed_official 181:a4cbdfbbd2f4 166 ADC1->CHSELR = 0; // [TODO] Workaround. To be removed after Cube driver is corrected.
mbed_official 181:a4cbdfbbd2f4 167 HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
mbed_official 181:a4cbdfbbd2f4 168
mbed_official 181:a4cbdfbbd2f4 169 HAL_ADC_Start(&AdcHandle); // Start conversion
mbed_official 181:a4cbdfbbd2f4 170
mbed_official 181:a4cbdfbbd2f4 171 // Wait end of conversion and get value
mbed_official 181:a4cbdfbbd2f4 172 if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
mbed_official 181:a4cbdfbbd2f4 173 return (HAL_ADC_GetValue(&AdcHandle));
mbed_official 181:a4cbdfbbd2f4 174 } else {
mbed_official 181:a4cbdfbbd2f4 175 return 0;
mbed_official 181:a4cbdfbbd2f4 176 }
mbed_official 181:a4cbdfbbd2f4 177 }
mbed_official 181:a4cbdfbbd2f4 178
mbed_official 181:a4cbdfbbd2f4 179 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 181:a4cbdfbbd2f4 180 return (adc_read(obj));
mbed_official 181:a4cbdfbbd2f4 181 }
mbed_official 181:a4cbdfbbd2f4 182
mbed_official 181:a4cbdfbbd2f4 183 float analogin_read(analogin_t *obj) {
mbed_official 181:a4cbdfbbd2f4 184 uint16_t value = adc_read(obj);
mbed_official 181:a4cbdfbbd2f4 185 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 181:a4cbdfbbd2f4 186 }
mbed_official 181:a4cbdfbbd2f4 187
mbed_official 181:a4cbdfbbd2f4 188 #endif