Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/analogin_device.c@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 * Copyright (c) 2016, STMicroelectronics
lypinator 0:bb348c97df44 3 * All rights reserved.
lypinator 0:bb348c97df44 4 *
lypinator 0:bb348c97df44 5 * Redistribution and use in source and binary forms, with or without
lypinator 0:bb348c97df44 6 * modification, are permitted provided that the following conditions are met:
lypinator 0:bb348c97df44 7 *
lypinator 0:bb348c97df44 8 * 1. Redistributions of source code must retain the above copyright notice,
lypinator 0:bb348c97df44 9 * this list of conditions and the following disclaimer.
lypinator 0:bb348c97df44 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
lypinator 0:bb348c97df44 11 * this list of conditions and the following disclaimer in the documentation
lypinator 0:bb348c97df44 12 * and/or other materials provided with the distribution.
lypinator 0:bb348c97df44 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
lypinator 0:bb348c97df44 14 * may be used to endorse or promote products derived from this software
lypinator 0:bb348c97df44 15 * without specific prior written permission.
lypinator 0:bb348c97df44 16 *
lypinator 0:bb348c97df44 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
lypinator 0:bb348c97df44 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
lypinator 0:bb348c97df44 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lypinator 0:bb348c97df44 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
lypinator 0:bb348c97df44 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
lypinator 0:bb348c97df44 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
lypinator 0:bb348c97df44 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lypinator 0:bb348c97df44 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
lypinator 0:bb348c97df44 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
lypinator 0:bb348c97df44 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lypinator 0:bb348c97df44 27 */
lypinator 0:bb348c97df44 28 #include "mbed_assert.h"
lypinator 0:bb348c97df44 29 #include "analogin_api.h"
lypinator 0:bb348c97df44 30
lypinator 0:bb348c97df44 31 #if DEVICE_ANALOGIN
lypinator 0:bb348c97df44 32
lypinator 0:bb348c97df44 33 #include "mbed_wait_api.h"
lypinator 0:bb348c97df44 34 #include "cmsis.h"
lypinator 0:bb348c97df44 35 #include "pinmap.h"
lypinator 0:bb348c97df44 36 #include "mbed_error.h"
lypinator 0:bb348c97df44 37 #include "PeripheralPins.h"
lypinator 0:bb348c97df44 38
lypinator 0:bb348c97df44 39 void analogin_init(analogin_t *obj, PinName pin)
lypinator 0:bb348c97df44 40 {
lypinator 0:bb348c97df44 41 uint32_t function = (uint32_t)NC;
lypinator 0:bb348c97df44 42
lypinator 0:bb348c97df44 43 // ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
lypinator 0:bb348c97df44 44 // are described in PinNames.h and PeripheralPins.c
lypinator 0:bb348c97df44 45 // Pin value must be between 0xF0 and 0xFF
lypinator 0:bb348c97df44 46 if ((pin < 0xF0) || (pin >= 0x100)) {
lypinator 0:bb348c97df44 47 // Normal channels
lypinator 0:bb348c97df44 48 // Get the peripheral name from the pin and assign it to the object
lypinator 0:bb348c97df44 49 obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC);
lypinator 0:bb348c97df44 50 // Get the functions (adc channel) from the pin and assign it to the object
lypinator 0:bb348c97df44 51 function = pinmap_function(pin, PinMap_ADC);
lypinator 0:bb348c97df44 52 // Configure GPIO
lypinator 0:bb348c97df44 53 pinmap_pinout(pin, PinMap_ADC);
lypinator 0:bb348c97df44 54 } else {
lypinator 0:bb348c97df44 55 // Internal channels
lypinator 0:bb348c97df44 56 obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC_Internal);
lypinator 0:bb348c97df44 57 function = pinmap_function(pin, PinMap_ADC_Internal);
lypinator 0:bb348c97df44 58 // No GPIO configuration for internal channels
lypinator 0:bb348c97df44 59 }
lypinator 0:bb348c97df44 60 MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
lypinator 0:bb348c97df44 61 MBED_ASSERT(function != (uint32_t)NC);
lypinator 0:bb348c97df44 62
lypinator 0:bb348c97df44 63 obj->channel = STM_PIN_CHANNEL(function);
lypinator 0:bb348c97df44 64
lypinator 0:bb348c97df44 65 // Save pin number for the read function
lypinator 0:bb348c97df44 66 obj->pin = pin;
lypinator 0:bb348c97df44 67
lypinator 0:bb348c97df44 68 // Configure ADC object structures
lypinator 0:bb348c97df44 69 obj->handle.State = HAL_ADC_STATE_RESET;
lypinator 0:bb348c97df44 70 obj->handle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
lypinator 0:bb348c97df44 71 obj->handle.Init.Resolution = ADC_RESOLUTION_12B;
lypinator 0:bb348c97df44 72 obj->handle.Init.ScanConvMode = DISABLE;
lypinator 0:bb348c97df44 73 obj->handle.Init.ContinuousConvMode = DISABLE;
lypinator 0:bb348c97df44 74 obj->handle.Init.DiscontinuousConvMode = DISABLE;
lypinator 0:bb348c97df44 75 obj->handle.Init.NbrOfDiscConversion = 0;
lypinator 0:bb348c97df44 76 obj->handle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
lypinator 0:bb348c97df44 77 obj->handle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
lypinator 0:bb348c97df44 78 obj->handle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
lypinator 0:bb348c97df44 79 obj->handle.Init.NbrOfConversion = 1;
lypinator 0:bb348c97df44 80 obj->handle.Init.DMAContinuousRequests = DISABLE;
lypinator 0:bb348c97df44 81 obj->handle.Init.EOCSelection = DISABLE;
lypinator 0:bb348c97df44 82
lypinator 0:bb348c97df44 83 #if defined(ADC1)
lypinator 0:bb348c97df44 84 if ((ADCName)obj->handle.Instance == ADC_1) {
lypinator 0:bb348c97df44 85 __HAL_RCC_ADC1_CLK_ENABLE();
lypinator 0:bb348c97df44 86 }
lypinator 0:bb348c97df44 87 #endif
lypinator 0:bb348c97df44 88 #if defined(ADC2)
lypinator 0:bb348c97df44 89 if ((ADCName)obj->handle.Instance == ADC_2) {
lypinator 0:bb348c97df44 90 __HAL_RCC_ADC2_CLK_ENABLE();
lypinator 0:bb348c97df44 91 }
lypinator 0:bb348c97df44 92 #endif
lypinator 0:bb348c97df44 93 #if defined(ADC3)
lypinator 0:bb348c97df44 94 if ((ADCName)obj->handle.Instance == ADC_3) {
lypinator 0:bb348c97df44 95 __HAL_RCC_ADC3_CLK_ENABLE();
lypinator 0:bb348c97df44 96 }
lypinator 0:bb348c97df44 97 #endif
lypinator 0:bb348c97df44 98
lypinator 0:bb348c97df44 99 if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
lypinator 0:bb348c97df44 100 error("Cannot initialize ADC");
lypinator 0:bb348c97df44 101 }
lypinator 0:bb348c97df44 102 }
lypinator 0:bb348c97df44 103
lypinator 0:bb348c97df44 104 uint16_t adc_read(analogin_t *obj)
lypinator 0:bb348c97df44 105 {
lypinator 0:bb348c97df44 106 ADC_ChannelConfTypeDef sConfig = {0};
lypinator 0:bb348c97df44 107
lypinator 0:bb348c97df44 108 // Configure ADC channel
lypinator 0:bb348c97df44 109 sConfig.Rank = 1;
lypinator 0:bb348c97df44 110 sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
lypinator 0:bb348c97df44 111 sConfig.Offset = 0;
lypinator 0:bb348c97df44 112
lypinator 0:bb348c97df44 113 switch (obj->channel) {
lypinator 0:bb348c97df44 114 case 0:
lypinator 0:bb348c97df44 115 sConfig.Channel = ADC_CHANNEL_0;
lypinator 0:bb348c97df44 116 break;
lypinator 0:bb348c97df44 117 case 1:
lypinator 0:bb348c97df44 118 sConfig.Channel = ADC_CHANNEL_1;
lypinator 0:bb348c97df44 119 break;
lypinator 0:bb348c97df44 120 case 2:
lypinator 0:bb348c97df44 121 sConfig.Channel = ADC_CHANNEL_2;
lypinator 0:bb348c97df44 122 break;
lypinator 0:bb348c97df44 123 case 3:
lypinator 0:bb348c97df44 124 sConfig.Channel = ADC_CHANNEL_3;
lypinator 0:bb348c97df44 125 break;
lypinator 0:bb348c97df44 126 case 4:
lypinator 0:bb348c97df44 127 sConfig.Channel = ADC_CHANNEL_4;
lypinator 0:bb348c97df44 128 break;
lypinator 0:bb348c97df44 129 case 5:
lypinator 0:bb348c97df44 130 sConfig.Channel = ADC_CHANNEL_5;
lypinator 0:bb348c97df44 131 break;
lypinator 0:bb348c97df44 132 case 6:
lypinator 0:bb348c97df44 133 sConfig.Channel = ADC_CHANNEL_6;
lypinator 0:bb348c97df44 134 break;
lypinator 0:bb348c97df44 135 case 7:
lypinator 0:bb348c97df44 136 sConfig.Channel = ADC_CHANNEL_7;
lypinator 0:bb348c97df44 137 break;
lypinator 0:bb348c97df44 138 case 8:
lypinator 0:bb348c97df44 139 sConfig.Channel = ADC_CHANNEL_8;
lypinator 0:bb348c97df44 140 break;
lypinator 0:bb348c97df44 141 case 9:
lypinator 0:bb348c97df44 142 sConfig.Channel = ADC_CHANNEL_9;
lypinator 0:bb348c97df44 143 break;
lypinator 0:bb348c97df44 144 case 10:
lypinator 0:bb348c97df44 145 sConfig.Channel = ADC_CHANNEL_10;
lypinator 0:bb348c97df44 146 break;
lypinator 0:bb348c97df44 147 case 11:
lypinator 0:bb348c97df44 148 sConfig.Channel = ADC_CHANNEL_11;
lypinator 0:bb348c97df44 149 break;
lypinator 0:bb348c97df44 150 case 12:
lypinator 0:bb348c97df44 151 sConfig.Channel = ADC_CHANNEL_12;
lypinator 0:bb348c97df44 152 break;
lypinator 0:bb348c97df44 153 case 13:
lypinator 0:bb348c97df44 154 sConfig.Channel = ADC_CHANNEL_13;
lypinator 0:bb348c97df44 155 break;
lypinator 0:bb348c97df44 156 case 14:
lypinator 0:bb348c97df44 157 sConfig.Channel = ADC_CHANNEL_14;
lypinator 0:bb348c97df44 158 break;
lypinator 0:bb348c97df44 159 case 15:
lypinator 0:bb348c97df44 160 sConfig.Channel = ADC_CHANNEL_15;
lypinator 0:bb348c97df44 161 break;
lypinator 0:bb348c97df44 162 case 16:
lypinator 0:bb348c97df44 163 sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
lypinator 0:bb348c97df44 164 sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Minimum ADC sampling time when reading the temperature is 10us
lypinator 0:bb348c97df44 165 break;
lypinator 0:bb348c97df44 166 case 17:
lypinator 0:bb348c97df44 167 sConfig.Channel = ADC_CHANNEL_VREFINT;
lypinator 0:bb348c97df44 168 sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Minimum ADC sampling time when reading the internal reference voltage is 10us
lypinator 0:bb348c97df44 169 break;
lypinator 0:bb348c97df44 170 case 18:
lypinator 0:bb348c97df44 171 sConfig.Channel = ADC_CHANNEL_VBAT;
lypinator 0:bb348c97df44 172 sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Minimum ADC sampling time when reading the VBAT is 5us
lypinator 0:bb348c97df44 173 break;
lypinator 0:bb348c97df44 174 default:
lypinator 0:bb348c97df44 175 return 0;
lypinator 0:bb348c97df44 176 }
lypinator 0:bb348c97df44 177
lypinator 0:bb348c97df44 178 // Measuring VBAT sets the ADC_CCR_VBATE bit in ADC->CCR, and there is not
lypinator 0:bb348c97df44 179 // possibility with the ST HAL driver to clear it. If it isn't cleared,
lypinator 0:bb348c97df44 180 // VBAT remains connected to the ADC channel in preference to temperature,
lypinator 0:bb348c97df44 181 // so VBAT readings are returned in place of temperature.
lypinator 0:bb348c97df44 182 ADC->CCR &= ~(ADC_CCR_VBATE | ADC_CCR_TSVREFE);
lypinator 0:bb348c97df44 183
lypinator 0:bb348c97df44 184 HAL_ADC_ConfigChannel(&obj->handle, &sConfig);
lypinator 0:bb348c97df44 185
lypinator 0:bb348c97df44 186 HAL_ADC_Start(&obj->handle); // Start conversion
lypinator 0:bb348c97df44 187
lypinator 0:bb348c97df44 188 // Wait end of conversion and get value
lypinator 0:bb348c97df44 189 if (HAL_ADC_PollForConversion(&obj->handle, 10) == HAL_OK) {
lypinator 0:bb348c97df44 190 return (uint16_t)HAL_ADC_GetValue(&obj->handle);
lypinator 0:bb348c97df44 191 } else {
lypinator 0:bb348c97df44 192 return 0;
lypinator 0:bb348c97df44 193 }
lypinator 0:bb348c97df44 194 }
lypinator 0:bb348c97df44 195
lypinator 0:bb348c97df44 196 #endif