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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_DISCO_F334C8/analogin_api.c@381:5460fc57b6e4, 2014-11-03 (annotated)

Committer:
mbed_official
Date:
Mon Nov 03 10:30:07 2014 +0000
Revision:
381:5460fc57b6e4
Synchronized with git revision 02478cd1f27fc7b9643486472635eb515b2bca81



Full URL: https://github.com/mbedmicro/mbed/commit/02478cd1f27fc7b9643486472635eb515b2bca81/



Target: LPC1549 - Fix serial interrupt issues (issue report #616)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 381:5460fc57b6e4 1 /* mbed Microcontroller Library
mbed_official 381:5460fc57b6e4 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 381:5460fc57b6e4 3 * All rights reserved.
mbed_official 381:5460fc57b6e4 4 *
mbed_official 381:5460fc57b6e4 5 * Redistribution and use in source and binary forms, with or without
mbed_official 381:5460fc57b6e4 6 * modification, are permitted provided that the following conditions are met:
mbed_official 381:5460fc57b6e4 7 *
mbed_official 381:5460fc57b6e4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 381:5460fc57b6e4 9 * this list of conditions and the following disclaimer.
mbed_official 381:5460fc57b6e4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 381:5460fc57b6e4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 381:5460fc57b6e4 12 * and/or other materials provided with the distribution.
mbed_official 381:5460fc57b6e4 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 381:5460fc57b6e4 14 * may be used to endorse or promote products derived from this software
mbed_official 381:5460fc57b6e4 15 * without specific prior written permission.
mbed_official 381:5460fc57b6e4 16 *
mbed_official 381:5460fc57b6e4 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 381:5460fc57b6e4 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 381:5460fc57b6e4 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 381:5460fc57b6e4 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 381:5460fc57b6e4 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 381:5460fc57b6e4 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 381:5460fc57b6e4 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 381:5460fc57b6e4 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 381:5460fc57b6e4 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 381:5460fc57b6e4 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 381:5460fc57b6e4 27 */
mbed_official 381:5460fc57b6e4 28 #include "mbed_assert.h"
mbed_official 381:5460fc57b6e4 29 #include "analogin_api.h"
mbed_official 381:5460fc57b6e4 30
mbed_official 381:5460fc57b6e4 31 #if DEVICE_ANALOGIN
mbed_official 381:5460fc57b6e4 32
mbed_official 381:5460fc57b6e4 33 #include "wait_api.h"
mbed_official 381:5460fc57b6e4 34 #include "cmsis.h"
mbed_official 381:5460fc57b6e4 35 #include "pinmap.h"
mbed_official 381:5460fc57b6e4 36
mbed_official 381:5460fc57b6e4 37 static const PinMap PinMap_ADC[] = {
mbed_official 381:5460fc57b6e4 38 {PA_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN1 - ARDUINO
mbed_official 381:5460fc57b6e4 39 {PA_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN2 - ARDUINO
mbed_official 381:5460fc57b6e4 40 {PA_2, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN3
mbed_official 381:5460fc57b6e4 41 {PA_3, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN4
mbed_official 381:5460fc57b6e4 42 {PA_4, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN1 - ARDUINO
mbed_official 381:5460fc57b6e4 43 {PA_5, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN2
mbed_official 381:5460fc57b6e4 44 {PA_6, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN3
mbed_official 381:5460fc57b6e4 45 {PA_7, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN4
mbed_official 381:5460fc57b6e4 46
mbed_official 381:5460fc57b6e4 47 {PB_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN11 - ARDUINO
mbed_official 381:5460fc57b6e4 48 {PB_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN12
mbed_official 381:5460fc57b6e4 49 {PB_2, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN12
mbed_official 381:5460fc57b6e4 50 {PB_12, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN13
mbed_official 381:5460fc57b6e4 51 {PB_13, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN13
mbed_official 381:5460fc57b6e4 52 {PB_14, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN14
mbed_official 381:5460fc57b6e4 53 {PB_15, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN15
mbed_official 381:5460fc57b6e4 54
mbed_official 381:5460fc57b6e4 55 {PC_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN6 - ARDUINO
mbed_official 381:5460fc57b6e4 56 {PC_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN7 - ARDUINO
mbed_official 381:5460fc57b6e4 57 {PC_2, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN8
mbed_official 381:5460fc57b6e4 58 {PC_3, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN9
mbed_official 381:5460fc57b6e4 59 {PC_4, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN5
mbed_official 381:5460fc57b6e4 60 {PC_5, ADC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC2_IN11
mbed_official 381:5460fc57b6e4 61 {NC, NC, 0}
mbed_official 381:5460fc57b6e4 62 };
mbed_official 381:5460fc57b6e4 63
mbed_official 381:5460fc57b6e4 64 ADC_HandleTypeDef AdcHandle;
mbed_official 381:5460fc57b6e4 65
mbed_official 381:5460fc57b6e4 66 int adc_inited = 0;
mbed_official 381:5460fc57b6e4 67
mbed_official 381:5460fc57b6e4 68 void analogin_init(analogin_t *obj, PinName pin)
mbed_official 381:5460fc57b6e4 69 {
mbed_official 381:5460fc57b6e4 70 // Get the peripheral name from the pin and assign it to the object
mbed_official 381:5460fc57b6e4 71 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 381:5460fc57b6e4 72 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 381:5460fc57b6e4 73
mbed_official 381:5460fc57b6e4 74 // Configure GPIO
mbed_official 381:5460fc57b6e4 75 pinmap_pinout(pin, PinMap_ADC);
mbed_official 381:5460fc57b6e4 76
mbed_official 381:5460fc57b6e4 77 // Save pin number for the read function
mbed_official 381:5460fc57b6e4 78 obj->pin = pin;
mbed_official 381:5460fc57b6e4 79
mbed_official 381:5460fc57b6e4 80 // The ADC initialization is done once
mbed_official 381:5460fc57b6e4 81 if (adc_inited == 0) {
mbed_official 381:5460fc57b6e4 82 adc_inited = 1;
mbed_official 381:5460fc57b6e4 83
mbed_official 381:5460fc57b6e4 84 // Enable ADC clock
mbed_official 381:5460fc57b6e4 85 if (obj->adc == ADC_1) __ADC1_CLK_ENABLE();
mbed_official 381:5460fc57b6e4 86 if (obj->adc == ADC_2) __ADC2_CLK_ENABLE();
mbed_official 381:5460fc57b6e4 87
mbed_official 381:5460fc57b6e4 88 // Configure ADC
mbed_official 381:5460fc57b6e4 89 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 381:5460fc57b6e4 90 AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
mbed_official 381:5460fc57b6e4 91 AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
mbed_official 381:5460fc57b6e4 92 AdcHandle.Init.ScanConvMode = DISABLE;
mbed_official 381:5460fc57b6e4 93 AdcHandle.Init.ContinuousConvMode = DISABLE;
mbed_official 381:5460fc57b6e4 94 AdcHandle.Init.DiscontinuousConvMode = DISABLE;
mbed_official 381:5460fc57b6e4 95 AdcHandle.Init.NbrOfDiscConversion = 0;
mbed_official 381:5460fc57b6e4 96 AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
mbed_official 381:5460fc57b6e4 97 AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
mbed_official 381:5460fc57b6e4 98 AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
mbed_official 381:5460fc57b6e4 99 AdcHandle.Init.NbrOfConversion = 1;
mbed_official 381:5460fc57b6e4 100 AdcHandle.Init.DMAContinuousRequests = DISABLE;
mbed_official 381:5460fc57b6e4 101 AdcHandle.Init.EOCSelection = DISABLE;
mbed_official 381:5460fc57b6e4 102 HAL_ADC_Init(&AdcHandle);
mbed_official 381:5460fc57b6e4 103 }
mbed_official 381:5460fc57b6e4 104 }
mbed_official 381:5460fc57b6e4 105
mbed_official 381:5460fc57b6e4 106 static inline uint16_t adc_read(analogin_t *obj)
mbed_official 381:5460fc57b6e4 107 {
mbed_official 381:5460fc57b6e4 108 ADC_ChannelConfTypeDef sConfig;
mbed_official 381:5460fc57b6e4 109
mbed_official 381:5460fc57b6e4 110 AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
mbed_official 381:5460fc57b6e4 111
mbed_official 381:5460fc57b6e4 112 // Configure ADC channel
mbed_official 381:5460fc57b6e4 113 sConfig.Rank = ADC_REGULAR_RANK_1;
mbed_official 381:5460fc57b6e4 114 sConfig.SamplingTime = ADC_SAMPLETIME_19CYCLES_5;
mbed_official 381:5460fc57b6e4 115 sConfig.SingleDiff = ADC_SINGLE_ENDED;
mbed_official 381:5460fc57b6e4 116 sConfig.OffsetNumber = ADC_OFFSET_NONE;
mbed_official 381:5460fc57b6e4 117 sConfig.Offset = 0;
mbed_official 381:5460fc57b6e4 118
mbed_official 381:5460fc57b6e4 119 switch (obj->pin) {
mbed_official 381:5460fc57b6e4 120 case PA_0:
mbed_official 381:5460fc57b6e4 121 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 381:5460fc57b6e4 122 break;
mbed_official 381:5460fc57b6e4 123 case PA_1:
mbed_official 381:5460fc57b6e4 124 sConfig.Channel = ADC_CHANNEL_2;
mbed_official 381:5460fc57b6e4 125 break;
mbed_official 381:5460fc57b6e4 126 case PA_2:
mbed_official 381:5460fc57b6e4 127 sConfig.Channel = ADC_CHANNEL_3;
mbed_official 381:5460fc57b6e4 128 break;
mbed_official 381:5460fc57b6e4 129 case PA_3:
mbed_official 381:5460fc57b6e4 130 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 381:5460fc57b6e4 131 break;
mbed_official 381:5460fc57b6e4 132 case PA_4:
mbed_official 381:5460fc57b6e4 133 sConfig.Channel = ADC_CHANNEL_1;
mbed_official 381:5460fc57b6e4 134 break;
mbed_official 381:5460fc57b6e4 135 case PA_5:
mbed_official 381:5460fc57b6e4 136 sConfig.Channel = ADC_CHANNEL_2;
mbed_official 381:5460fc57b6e4 137 break;
mbed_official 381:5460fc57b6e4 138 case PA_6:
mbed_official 381:5460fc57b6e4 139 sConfig.Channel = ADC_CHANNEL_3;
mbed_official 381:5460fc57b6e4 140 break;
mbed_official 381:5460fc57b6e4 141 case PA_7:
mbed_official 381:5460fc57b6e4 142 sConfig.Channel = ADC_CHANNEL_4;
mbed_official 381:5460fc57b6e4 143 break;
mbed_official 381:5460fc57b6e4 144 case PB_0:
mbed_official 381:5460fc57b6e4 145 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 381:5460fc57b6e4 146 break;
mbed_official 381:5460fc57b6e4 147 case PB_1:
mbed_official 381:5460fc57b6e4 148 sConfig.Channel = ADC_CHANNEL_12;
mbed_official 381:5460fc57b6e4 149 break;
mbed_official 381:5460fc57b6e4 150 case PB_2:
mbed_official 381:5460fc57b6e4 151 sConfig.Channel = ADC_CHANNEL_12;
mbed_official 381:5460fc57b6e4 152 break;
mbed_official 381:5460fc57b6e4 153 case PB_12:
mbed_official 381:5460fc57b6e4 154 sConfig.Channel = ADC_CHANNEL_13;
mbed_official 381:5460fc57b6e4 155 break;
mbed_official 381:5460fc57b6e4 156 case PB_13:
mbed_official 381:5460fc57b6e4 157 sConfig.Channel = ADC_CHANNEL_13;
mbed_official 381:5460fc57b6e4 158 break;
mbed_official 381:5460fc57b6e4 159 case PB_14:
mbed_official 381:5460fc57b6e4 160 sConfig.Channel = ADC_CHANNEL_14;
mbed_official 381:5460fc57b6e4 161 break;
mbed_official 381:5460fc57b6e4 162 case PB_15:
mbed_official 381:5460fc57b6e4 163 sConfig.Channel = ADC_CHANNEL_15;
mbed_official 381:5460fc57b6e4 164 break;
mbed_official 381:5460fc57b6e4 165 case PC_0:
mbed_official 381:5460fc57b6e4 166 sConfig.Channel = ADC_CHANNEL_6;
mbed_official 381:5460fc57b6e4 167 break;
mbed_official 381:5460fc57b6e4 168 case PC_1:
mbed_official 381:5460fc57b6e4 169 sConfig.Channel = ADC_CHANNEL_7;
mbed_official 381:5460fc57b6e4 170 break;
mbed_official 381:5460fc57b6e4 171 case PC_2:
mbed_official 381:5460fc57b6e4 172 sConfig.Channel = ADC_CHANNEL_8;
mbed_official 381:5460fc57b6e4 173 break;
mbed_official 381:5460fc57b6e4 174 case PC_3:
mbed_official 381:5460fc57b6e4 175 sConfig.Channel = ADC_CHANNEL_9;
mbed_official 381:5460fc57b6e4 176 break;
mbed_official 381:5460fc57b6e4 177 case PC_4:
mbed_official 381:5460fc57b6e4 178 sConfig.Channel = ADC_CHANNEL_5;
mbed_official 381:5460fc57b6e4 179 break;
mbed_official 381:5460fc57b6e4 180 case PC_5:
mbed_official 381:5460fc57b6e4 181 sConfig.Channel = ADC_CHANNEL_11;
mbed_official 381:5460fc57b6e4 182 break;
mbed_official 381:5460fc57b6e4 183 default:
mbed_official 381:5460fc57b6e4 184 return 0;
mbed_official 381:5460fc57b6e4 185 }
mbed_official 381:5460fc57b6e4 186
mbed_official 381:5460fc57b6e4 187 HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
mbed_official 381:5460fc57b6e4 188
mbed_official 381:5460fc57b6e4 189 HAL_ADC_Start(&AdcHandle); // Start conversion
mbed_official 381:5460fc57b6e4 190
mbed_official 381:5460fc57b6e4 191 // Wait end of conversion and get value
mbed_official 381:5460fc57b6e4 192 if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
mbed_official 381:5460fc57b6e4 193 return (HAL_ADC_GetValue(&AdcHandle));
mbed_official 381:5460fc57b6e4 194 } else {
mbed_official 381:5460fc57b6e4 195 return 0;
mbed_official 381:5460fc57b6e4 196 }
mbed_official 381:5460fc57b6e4 197 }
mbed_official 381:5460fc57b6e4 198
mbed_official 381:5460fc57b6e4 199 uint16_t analogin_read_u16(analogin_t *obj)
mbed_official 381:5460fc57b6e4 200 {
mbed_official 381:5460fc57b6e4 201 uint16_t value = adc_read(obj);
mbed_official 381:5460fc57b6e4 202 // 12-bit to 16-bit conversion
mbed_official 381:5460fc57b6e4 203 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
mbed_official 381:5460fc57b6e4 204 return value;
mbed_official 381:5460fc57b6e4 205 }
mbed_official 381:5460fc57b6e4 206
mbed_official 381:5460fc57b6e4 207 float analogin_read(analogin_t *obj)
mbed_official 381:5460fc57b6e4 208 {
mbed_official 381:5460fc57b6e4 209 uint16_t value = adc_read(obj);
mbed_official 381:5460fc57b6e4 210 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 381:5460fc57b6e4 211 }
mbed_official 381:5460fc57b6e4 212
mbed_official 381:5460fc57b6e4 213 #endif