Mbed for VNG board
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targets/hal/TARGET_STM/TARGET_DISCO_F429ZI/analogin_api.c@428:4ddf7f7eabbb, 2014-12-08 (annotated)
- Committer:
- mbed_official
- Date:
- Mon Dec 08 07:30:07 2014 +0000
- Revision:
- 428:4ddf7f7eabbb
- Parent:
- 344:ed24f9926218
Synchronized with git revision 3413e21e59b8b0d03c0addac95b1ead87f0b7965
Full URL: https://github.com/mbedmicro/mbed/commit/3413e21e59b8b0d03c0addac95b1ead87f0b7965/
Gitignore - Ignore cscope and vim swap files
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 340:28d1f895c6fe | 1 | /* mbed Microcontroller Library |
mbed_official | 340:28d1f895c6fe | 2 | * Copyright (c) 2014, STMicroelectronics |
mbed_official | 340:28d1f895c6fe | 3 | * All rights reserved. |
mbed_official | 340:28d1f895c6fe | 4 | * |
mbed_official | 340:28d1f895c6fe | 5 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 340:28d1f895c6fe | 6 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 340:28d1f895c6fe | 7 | * |
mbed_official | 340:28d1f895c6fe | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 340:28d1f895c6fe | 9 | * this list of conditions and the following disclaimer. |
mbed_official | 340:28d1f895c6fe | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 340:28d1f895c6fe | 11 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 340:28d1f895c6fe | 12 | * and/or other materials provided with the distribution. |
mbed_official | 340:28d1f895c6fe | 13 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 340:28d1f895c6fe | 14 | * may be used to endorse or promote products derived from this software |
mbed_official | 340:28d1f895c6fe | 15 | * without specific prior written permission. |
mbed_official | 340:28d1f895c6fe | 16 | * |
mbed_official | 340:28d1f895c6fe | 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 340:28d1f895c6fe | 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 340:28d1f895c6fe | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 340:28d1f895c6fe | 20 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 340:28d1f895c6fe | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 340:28d1f895c6fe | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 340:28d1f895c6fe | 23 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 340:28d1f895c6fe | 24 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 340:28d1f895c6fe | 25 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 340:28d1f895c6fe | 26 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 340:28d1f895c6fe | 27 | */ |
mbed_official | 340:28d1f895c6fe | 28 | #include "mbed_assert.h" |
mbed_official | 340:28d1f895c6fe | 29 | #include "analogin_api.h" |
mbed_official | 340:28d1f895c6fe | 30 | |
mbed_official | 340:28d1f895c6fe | 31 | #if DEVICE_ANALOGIN |
mbed_official | 340:28d1f895c6fe | 32 | |
mbed_official | 340:28d1f895c6fe | 33 | #include "wait_api.h" |
mbed_official | 340:28d1f895c6fe | 34 | #include "cmsis.h" |
mbed_official | 340:28d1f895c6fe | 35 | #include "pinmap.h" |
mbed_official | 428:4ddf7f7eabbb | 36 | #include "PeripheralPins.h" |
mbed_official | 340:28d1f895c6fe | 37 | |
mbed_official | 340:28d1f895c6fe | 38 | ADC_HandleTypeDef AdcHandle; |
mbed_official | 340:28d1f895c6fe | 39 | |
mbed_official | 340:28d1f895c6fe | 40 | int adc_inited = 0; |
mbed_official | 340:28d1f895c6fe | 41 | |
mbed_official | 340:28d1f895c6fe | 42 | void analogin_init(analogin_t *obj, PinName pin) |
mbed_official | 340:28d1f895c6fe | 43 | { |
mbed_official | 340:28d1f895c6fe | 44 | // Get the peripheral name from the pin and assign it to the object |
mbed_official | 340:28d1f895c6fe | 45 | obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); |
mbed_official | 340:28d1f895c6fe | 46 | MBED_ASSERT(obj->adc != (ADCName)NC); |
mbed_official | 340:28d1f895c6fe | 47 | |
mbed_official | 340:28d1f895c6fe | 48 | // Configure GPIO |
mbed_official | 340:28d1f895c6fe | 49 | pinmap_pinout(pin, PinMap_ADC); |
mbed_official | 340:28d1f895c6fe | 50 | |
mbed_official | 340:28d1f895c6fe | 51 | // Save pin number for the read function |
mbed_official | 340:28d1f895c6fe | 52 | obj->pin = pin; |
mbed_official | 340:28d1f895c6fe | 53 | |
mbed_official | 340:28d1f895c6fe | 54 | // The ADC initialization is done once |
mbed_official | 340:28d1f895c6fe | 55 | if (adc_inited == 0) { |
mbed_official | 340:28d1f895c6fe | 56 | adc_inited = 1; |
mbed_official | 340:28d1f895c6fe | 57 | |
mbed_official | 340:28d1f895c6fe | 58 | // Enable ADC clock |
mbed_official | 340:28d1f895c6fe | 59 | __ADC1_CLK_ENABLE(); |
mbed_official | 340:28d1f895c6fe | 60 | |
mbed_official | 340:28d1f895c6fe | 61 | // Configure ADC |
mbed_official | 340:28d1f895c6fe | 62 | AdcHandle.Instance = (ADC_TypeDef *)(obj->adc); |
mbed_official | 340:28d1f895c6fe | 63 | AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2; |
mbed_official | 340:28d1f895c6fe | 64 | AdcHandle.Init.Resolution = ADC_RESOLUTION12b; |
mbed_official | 340:28d1f895c6fe | 65 | AdcHandle.Init.ScanConvMode = DISABLE; |
mbed_official | 340:28d1f895c6fe | 66 | AdcHandle.Init.ContinuousConvMode = DISABLE; |
mbed_official | 340:28d1f895c6fe | 67 | AdcHandle.Init.DiscontinuousConvMode = DISABLE; |
mbed_official | 340:28d1f895c6fe | 68 | AdcHandle.Init.NbrOfDiscConversion = 0; |
mbed_official | 340:28d1f895c6fe | 69 | AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; |
mbed_official | 340:28d1f895c6fe | 70 | AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1; |
mbed_official | 340:28d1f895c6fe | 71 | AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT; |
mbed_official | 340:28d1f895c6fe | 72 | AdcHandle.Init.NbrOfConversion = 1; |
mbed_official | 340:28d1f895c6fe | 73 | AdcHandle.Init.DMAContinuousRequests = DISABLE; |
mbed_official | 340:28d1f895c6fe | 74 | AdcHandle.Init.EOCSelection = DISABLE; |
mbed_official | 340:28d1f895c6fe | 75 | HAL_ADC_Init(&AdcHandle); |
mbed_official | 340:28d1f895c6fe | 76 | } |
mbed_official | 340:28d1f895c6fe | 77 | } |
mbed_official | 340:28d1f895c6fe | 78 | |
mbed_official | 340:28d1f895c6fe | 79 | static inline uint16_t adc_read(analogin_t *obj) |
mbed_official | 340:28d1f895c6fe | 80 | { |
mbed_official | 340:28d1f895c6fe | 81 | ADC_ChannelConfTypeDef sConfig; |
mbed_official | 340:28d1f895c6fe | 82 | |
mbed_official | 340:28d1f895c6fe | 83 | AdcHandle.Instance = (ADC_TypeDef *)(obj->adc); |
mbed_official | 340:28d1f895c6fe | 84 | |
mbed_official | 340:28d1f895c6fe | 85 | // Configure ADC channel |
mbed_official | 340:28d1f895c6fe | 86 | sConfig.Rank = 1; |
mbed_official | 340:28d1f895c6fe | 87 | sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES; |
mbed_official | 340:28d1f895c6fe | 88 | sConfig.Offset = 0; |
mbed_official | 340:28d1f895c6fe | 89 | |
mbed_official | 340:28d1f895c6fe | 90 | switch (obj->pin) { |
mbed_official | 340:28d1f895c6fe | 91 | case PA_0: |
mbed_official | 340:28d1f895c6fe | 92 | sConfig.Channel = ADC_CHANNEL_0; |
mbed_official | 340:28d1f895c6fe | 93 | break; |
mbed_official | 340:28d1f895c6fe | 94 | case PA_1: |
mbed_official | 340:28d1f895c6fe | 95 | sConfig.Channel = ADC_CHANNEL_1; |
mbed_official | 340:28d1f895c6fe | 96 | break; |
mbed_official | 340:28d1f895c6fe | 97 | case PA_2: |
mbed_official | 340:28d1f895c6fe | 98 | sConfig.Channel = ADC_CHANNEL_2; |
mbed_official | 340:28d1f895c6fe | 99 | break; |
mbed_official | 340:28d1f895c6fe | 100 | case PA_3: |
mbed_official | 340:28d1f895c6fe | 101 | sConfig.Channel = ADC_CHANNEL_3; |
mbed_official | 340:28d1f895c6fe | 102 | break; |
mbed_official | 340:28d1f895c6fe | 103 | case PA_4: |
mbed_official | 340:28d1f895c6fe | 104 | sConfig.Channel = ADC_CHANNEL_4; |
mbed_official | 340:28d1f895c6fe | 105 | break; |
mbed_official | 340:28d1f895c6fe | 106 | case PA_5: |
mbed_official | 340:28d1f895c6fe | 107 | sConfig.Channel = ADC_CHANNEL_5; |
mbed_official | 340:28d1f895c6fe | 108 | break; |
mbed_official | 340:28d1f895c6fe | 109 | case PA_6: |
mbed_official | 340:28d1f895c6fe | 110 | sConfig.Channel = ADC_CHANNEL_6; |
mbed_official | 340:28d1f895c6fe | 111 | break; |
mbed_official | 340:28d1f895c6fe | 112 | case PA_7: |
mbed_official | 340:28d1f895c6fe | 113 | sConfig.Channel = ADC_CHANNEL_7; |
mbed_official | 340:28d1f895c6fe | 114 | break; |
mbed_official | 340:28d1f895c6fe | 115 | case PB_0: |
mbed_official | 340:28d1f895c6fe | 116 | sConfig.Channel = ADC_CHANNEL_8; |
mbed_official | 340:28d1f895c6fe | 117 | break; |
mbed_official | 340:28d1f895c6fe | 118 | case PB_1: |
mbed_official | 340:28d1f895c6fe | 119 | sConfig.Channel = ADC_CHANNEL_9; |
mbed_official | 340:28d1f895c6fe | 120 | break; |
mbed_official | 340:28d1f895c6fe | 121 | case PC_0: |
mbed_official | 340:28d1f895c6fe | 122 | sConfig.Channel = ADC_CHANNEL_10; |
mbed_official | 340:28d1f895c6fe | 123 | break; |
mbed_official | 340:28d1f895c6fe | 124 | case PC_1: |
mbed_official | 340:28d1f895c6fe | 125 | sConfig.Channel = ADC_CHANNEL_11; |
mbed_official | 340:28d1f895c6fe | 126 | break; |
mbed_official | 340:28d1f895c6fe | 127 | case PC_2: |
mbed_official | 340:28d1f895c6fe | 128 | sConfig.Channel = ADC_CHANNEL_12; |
mbed_official | 340:28d1f895c6fe | 129 | break; |
mbed_official | 340:28d1f895c6fe | 130 | case PC_3: |
mbed_official | 340:28d1f895c6fe | 131 | sConfig.Channel = ADC_CHANNEL_13; |
mbed_official | 340:28d1f895c6fe | 132 | break; |
mbed_official | 340:28d1f895c6fe | 133 | case PC_4: |
mbed_official | 340:28d1f895c6fe | 134 | sConfig.Channel = ADC_CHANNEL_14; |
mbed_official | 340:28d1f895c6fe | 135 | break; |
mbed_official | 340:28d1f895c6fe | 136 | case PC_5: |
mbed_official | 340:28d1f895c6fe | 137 | sConfig.Channel = ADC_CHANNEL_15; |
mbed_official | 340:28d1f895c6fe | 138 | break; |
mbed_official | 340:28d1f895c6fe | 139 | default: |
mbed_official | 340:28d1f895c6fe | 140 | return 0; |
mbed_official | 340:28d1f895c6fe | 141 | } |
mbed_official | 340:28d1f895c6fe | 142 | |
mbed_official | 340:28d1f895c6fe | 143 | HAL_ADC_ConfigChannel(&AdcHandle, &sConfig); |
mbed_official | 340:28d1f895c6fe | 144 | |
mbed_official | 340:28d1f895c6fe | 145 | HAL_ADC_Start(&AdcHandle); // Start conversion |
mbed_official | 340:28d1f895c6fe | 146 | |
mbed_official | 340:28d1f895c6fe | 147 | // Wait end of conversion and get value |
mbed_official | 340:28d1f895c6fe | 148 | if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) { |
mbed_official | 340:28d1f895c6fe | 149 | return (HAL_ADC_GetValue(&AdcHandle)); |
mbed_official | 340:28d1f895c6fe | 150 | } else { |
mbed_official | 340:28d1f895c6fe | 151 | return 0; |
mbed_official | 340:28d1f895c6fe | 152 | } |
mbed_official | 340:28d1f895c6fe | 153 | } |
mbed_official | 340:28d1f895c6fe | 154 | |
mbed_official | 340:28d1f895c6fe | 155 | uint16_t analogin_read_u16(analogin_t *obj) |
mbed_official | 340:28d1f895c6fe | 156 | { |
mbed_official | 340:28d1f895c6fe | 157 | uint16_t value = adc_read(obj); |
mbed_official | 340:28d1f895c6fe | 158 | // 12-bit to 16-bit conversion |
mbed_official | 340:28d1f895c6fe | 159 | value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F); |
mbed_official | 340:28d1f895c6fe | 160 | return value; |
mbed_official | 340:28d1f895c6fe | 161 | } |
mbed_official | 340:28d1f895c6fe | 162 | |
mbed_official | 340:28d1f895c6fe | 163 | float analogin_read(analogin_t *obj) |
mbed_official | 340:28d1f895c6fe | 164 | { |
mbed_official | 340:28d1f895c6fe | 165 | uint16_t value = adc_read(obj); |
mbed_official | 340:28d1f895c6fe | 166 | return (float)value * (1.0f / (float)0xFFF); // 12 bits range |
mbed_official | 340:28d1f895c6fe | 167 | } |
mbed_official | 340:28d1f895c6fe | 168 | |
mbed_official | 340:28d1f895c6fe | 169 | #endif |