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targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogin_api.c@445:9a3ffe6cfa19, 2015-01-14 (annotated)
- Committer:
- moirans2
- Date:
- Wed Jan 14 20:53:08 2015 +0000
- Revision:
- 445:9a3ffe6cfa19
- Parent:
- 414:4ec4c5b614b0
internal clock stm32L051
Who changed what in which revision?
User | Revision | Line number | New 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 |