mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/analogin_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)
- Committer:
- shaoziyang
- Date:
- Sat Sep 13 14:25:46 2014 +0000
- Revision:
- 323:9e901b0a5aa1
- Parent:
- 309:8f72041da6ba
test with CLOCK_SETUP = 0
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 76:aeb1df146756 | 1 | /* mbed Microcontroller Library |
mbed_official | 76:aeb1df146756 | 2 | * Copyright (c) 2014, STMicroelectronics |
mbed_official | 76:aeb1df146756 | 3 | * All rights reserved. |
mbed_official | 76:aeb1df146756 | 4 | * |
mbed_official | 76:aeb1df146756 | 5 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 76:aeb1df146756 | 6 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 76:aeb1df146756 | 7 | * |
mbed_official | 76:aeb1df146756 | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 76:aeb1df146756 | 9 | * this list of conditions and the following disclaimer. |
mbed_official | 76:aeb1df146756 | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 76:aeb1df146756 | 11 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 76:aeb1df146756 | 12 | * and/or other materials provided with the distribution. |
mbed_official | 76:aeb1df146756 | 13 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 76:aeb1df146756 | 14 | * may be used to endorse or promote products derived from this software |
mbed_official | 76:aeb1df146756 | 15 | * without specific prior written permission. |
mbed_official | 76:aeb1df146756 | 16 | * |
mbed_official | 76:aeb1df146756 | 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 76:aeb1df146756 | 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 76:aeb1df146756 | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 76:aeb1df146756 | 20 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 76:aeb1df146756 | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 76:aeb1df146756 | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 76:aeb1df146756 | 23 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 76:aeb1df146756 | 24 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 76:aeb1df146756 | 25 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 76:aeb1df146756 | 26 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 76:aeb1df146756 | 27 | */ |
mbed_official | 227:7bd0639b8911 | 28 | #include "mbed_assert.h" |
mbed_official | 76:aeb1df146756 | 29 | #include "analogin_api.h" |
mbed_official | 76:aeb1df146756 | 30 | |
mbed_official | 76:aeb1df146756 | 31 | #if DEVICE_ANALOGIN |
mbed_official | 76:aeb1df146756 | 32 | |
mbed_official | 76:aeb1df146756 | 33 | #include "cmsis.h" |
mbed_official | 76:aeb1df146756 | 34 | #include "pinmap.h" |
mbed_official | 174:8bb9f3a33240 | 35 | #include "wait_api.h" |
mbed_official | 76:aeb1df146756 | 36 | |
mbed_official | 76:aeb1df146756 | 37 | static const PinMap PinMap_ADC[] = { |
mbed_official | 129:0182c99221bc | 38 | {PA_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN0 |
mbed_official | 129:0182c99221bc | 39 | {PA_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN1 |
mbed_official | 129:0182c99221bc | 40 | {PA_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN2 |
mbed_official | 129:0182c99221bc | 41 | {PA_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN3 |
mbed_official | 129:0182c99221bc | 42 | {PA_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN4 |
mbed_official | 129:0182c99221bc | 43 | {PA_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN5 |
mbed_official | 129:0182c99221bc | 44 | {PA_6, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN6 |
mbed_official | 129:0182c99221bc | 45 | {PA_7, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN7 |
mbed_official | 129:0182c99221bc | 46 | {PB_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN8 |
mbed_official | 129:0182c99221bc | 47 | {PB_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN9 |
mbed_official | 129:0182c99221bc | 48 | {PB_12, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN18 |
mbed_official | 129:0182c99221bc | 49 | {PB_13, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN19 |
mbed_official | 129:0182c99221bc | 50 | {PB_14, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN20 |
mbed_official | 129:0182c99221bc | 51 | {PB_15, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN21 |
mbed_official | 129:0182c99221bc | 52 | {PC_0, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN10 |
mbed_official | 129:0182c99221bc | 53 | {PC_1, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN11 |
mbed_official | 129:0182c99221bc | 54 | {PC_2, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN12 |
mbed_official | 129:0182c99221bc | 55 | {PC_3, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN13 |
mbed_official | 129:0182c99221bc | 56 | {PC_4, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN14 |
mbed_official | 129:0182c99221bc | 57 | {PC_5, ADC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // ADC_IN15 |
mbed_official | 129:0182c99221bc | 58 | {NC, NC, 0} |
mbed_official | 76:aeb1df146756 | 59 | }; |
mbed_official | 76:aeb1df146756 | 60 | |
mbed_official | 76:aeb1df146756 | 61 | int adc_inited = 0; |
mbed_official | 76:aeb1df146756 | 62 | |
mbed_official | 76:aeb1df146756 | 63 | void analogin_init(analogin_t *obj, PinName pin) { |
mbed_official | 129:0182c99221bc | 64 | ADC_TypeDef *adc; |
mbed_official | 76:aeb1df146756 | 65 | ADC_InitTypeDef ADC_InitStructure; |
mbed_official | 174:8bb9f3a33240 | 66 | |
mbed_official | 129:0182c99221bc | 67 | // Get the peripheral name from the pin and assign it to the object |
mbed_official | 76:aeb1df146756 | 68 | obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); |
mbed_official | 227:7bd0639b8911 | 69 | MBED_ASSERT(obj->adc != (ADCName)NC); |
mbed_official | 76:aeb1df146756 | 70 | |
mbed_official | 76:aeb1df146756 | 71 | // Configure GPIO |
mbed_official | 76:aeb1df146756 | 72 | pinmap_pinout(pin, PinMap_ADC); |
mbed_official | 76:aeb1df146756 | 73 | |
mbed_official | 76:aeb1df146756 | 74 | // Save pin number for the read function |
mbed_official | 76:aeb1df146756 | 75 | obj->pin = pin; |
mbed_official | 76:aeb1df146756 | 76 | |
mbed_official | 76:aeb1df146756 | 77 | // The ADC initialization is done once |
mbed_official | 76:aeb1df146756 | 78 | if (adc_inited == 0) { |
mbed_official | 76:aeb1df146756 | 79 | adc_inited = 1; |
mbed_official | 76:aeb1df146756 | 80 | |
mbed_official | 76:aeb1df146756 | 81 | // Get ADC registers structure address |
mbed_official | 76:aeb1df146756 | 82 | adc = (ADC_TypeDef *)(obj->adc); |
mbed_official | 174:8bb9f3a33240 | 83 | |
mbed_official | 309:8f72041da6ba | 84 | // Enable the HSI |
mbed_official | 309:8f72041da6ba | 85 | RCC_HSICmd(ENABLE); |
mbed_official | 309:8f72041da6ba | 86 | // Wait until HSI oscillator is ready |
mbed_official | 309:8f72041da6ba | 87 | while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET) {} |
mbed_official | 309:8f72041da6ba | 88 | |
mbed_official | 76:aeb1df146756 | 89 | // Enable ADC clock |
mbed_official | 76:aeb1df146756 | 90 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); |
mbed_official | 174:8bb9f3a33240 | 91 | |
mbed_official | 76:aeb1df146756 | 92 | // Configure ADC |
mbed_official | 76:aeb1df146756 | 93 | ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; |
mbed_official | 76:aeb1df146756 | 94 | ADC_InitStructure.ADC_ScanConvMode = DISABLE; |
mbed_official | 76:aeb1df146756 | 95 | ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; |
mbed_official | 76:aeb1df146756 | 96 | ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; |
mbed_official | 76:aeb1df146756 | 97 | ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2; |
mbed_official | 76:aeb1df146756 | 98 | ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; |
mbed_official | 76:aeb1df146756 | 99 | ADC_InitStructure.ADC_NbrOfConversion = 1; |
mbed_official | 76:aeb1df146756 | 100 | ADC_Init(adc, &ADC_InitStructure); |
mbed_official | 76:aeb1df146756 | 101 | |
mbed_official | 76:aeb1df146756 | 102 | // Enable ADC |
mbed_official | 76:aeb1df146756 | 103 | ADC_Cmd(adc, ENABLE); |
mbed_official | 76:aeb1df146756 | 104 | } |
mbed_official | 76:aeb1df146756 | 105 | } |
mbed_official | 76:aeb1df146756 | 106 | |
mbed_official | 76:aeb1df146756 | 107 | static inline uint16_t adc_read(analogin_t *obj) { |
mbed_official | 174:8bb9f3a33240 | 108 | // Get ADC registers structure address |
mbed_official | 174:8bb9f3a33240 | 109 | ADC_TypeDef *adc = (ADC_TypeDef *)(obj->adc); |
mbed_official | 174:8bb9f3a33240 | 110 | uint8_t channel = 0; |
mbed_official | 76:aeb1df146756 | 111 | |
mbed_official | 174:8bb9f3a33240 | 112 | // Configure ADC channel |
mbed_official | 174:8bb9f3a33240 | 113 | switch (obj->pin) { |
mbed_official | 174:8bb9f3a33240 | 114 | case PA_0: |
mbed_official | 174:8bb9f3a33240 | 115 | channel = ADC_Channel_0; |
mbed_official | 174:8bb9f3a33240 | 116 | break; |
mbed_official | 174:8bb9f3a33240 | 117 | case PA_1: |
mbed_official | 174:8bb9f3a33240 | 118 | channel = ADC_Channel_1; |
mbed_official | 174:8bb9f3a33240 | 119 | break; |
mbed_official | 174:8bb9f3a33240 | 120 | case PA_2: |
mbed_official | 174:8bb9f3a33240 | 121 | channel = ADC_Channel_2; |
mbed_official | 174:8bb9f3a33240 | 122 | break; |
mbed_official | 174:8bb9f3a33240 | 123 | case PA_3: |
mbed_official | 174:8bb9f3a33240 | 124 | channel = ADC_Channel_3; |
mbed_official | 174:8bb9f3a33240 | 125 | break; |
mbed_official | 174:8bb9f3a33240 | 126 | case PA_4: |
mbed_official | 174:8bb9f3a33240 | 127 | channel = ADC_Channel_4; |
mbed_official | 174:8bb9f3a33240 | 128 | break; |
mbed_official | 174:8bb9f3a33240 | 129 | case PA_5: |
mbed_official | 174:8bb9f3a33240 | 130 | channel = ADC_Channel_5; |
mbed_official | 174:8bb9f3a33240 | 131 | break; |
mbed_official | 174:8bb9f3a33240 | 132 | case PA_6: |
mbed_official | 174:8bb9f3a33240 | 133 | channel = ADC_Channel_6; |
mbed_official | 174:8bb9f3a33240 | 134 | break; |
mbed_official | 174:8bb9f3a33240 | 135 | case PA_7: |
mbed_official | 174:8bb9f3a33240 | 136 | channel = ADC_Channel_7; |
mbed_official | 174:8bb9f3a33240 | 137 | break; |
mbed_official | 174:8bb9f3a33240 | 138 | case PB_0: |
mbed_official | 174:8bb9f3a33240 | 139 | channel = ADC_Channel_8; |
mbed_official | 174:8bb9f3a33240 | 140 | break; |
mbed_official | 174:8bb9f3a33240 | 141 | case PB_1: |
mbed_official | 174:8bb9f3a33240 | 142 | channel = ADC_Channel_9; |
mbed_official | 174:8bb9f3a33240 | 143 | break; |
mbed_official | 174:8bb9f3a33240 | 144 | case PB_12: |
mbed_official | 174:8bb9f3a33240 | 145 | channel = ADC_Channel_18; |
mbed_official | 174:8bb9f3a33240 | 146 | break; |
mbed_official | 174:8bb9f3a33240 | 147 | case PB_13: |
mbed_official | 174:8bb9f3a33240 | 148 | channel = ADC_Channel_19; |
mbed_official | 174:8bb9f3a33240 | 149 | break; |
mbed_official | 174:8bb9f3a33240 | 150 | case PB_14: |
mbed_official | 174:8bb9f3a33240 | 151 | channel = ADC_Channel_20; |
mbed_official | 174:8bb9f3a33240 | 152 | break; |
mbed_official | 174:8bb9f3a33240 | 153 | case PB_15: |
mbed_official | 174:8bb9f3a33240 | 154 | channel = ADC_Channel_21; |
mbed_official | 174:8bb9f3a33240 | 155 | break; |
mbed_official | 174:8bb9f3a33240 | 156 | case PC_0: |
mbed_official | 174:8bb9f3a33240 | 157 | channel = ADC_Channel_10; |
mbed_official | 174:8bb9f3a33240 | 158 | break; |
mbed_official | 174:8bb9f3a33240 | 159 | case PC_1: |
mbed_official | 174:8bb9f3a33240 | 160 | channel = ADC_Channel_11; |
mbed_official | 174:8bb9f3a33240 | 161 | break; |
mbed_official | 174:8bb9f3a33240 | 162 | case PC_2: |
mbed_official | 174:8bb9f3a33240 | 163 | channel = ADC_Channel_12; |
mbed_official | 174:8bb9f3a33240 | 164 | break; |
mbed_official | 174:8bb9f3a33240 | 165 | case PC_3: |
mbed_official | 174:8bb9f3a33240 | 166 | channel = ADC_Channel_13; |
mbed_official | 174:8bb9f3a33240 | 167 | break; |
mbed_official | 174:8bb9f3a33240 | 168 | case PC_4: |
mbed_official | 174:8bb9f3a33240 | 169 | channel = ADC_Channel_14; |
mbed_official | 174:8bb9f3a33240 | 170 | break; |
mbed_official | 174:8bb9f3a33240 | 171 | case PC_5: |
mbed_official | 174:8bb9f3a33240 | 172 | channel = ADC_Channel_15; |
mbed_official | 174:8bb9f3a33240 | 173 | break; |
mbed_official | 174:8bb9f3a33240 | 174 | default: |
mbed_official | 174:8bb9f3a33240 | 175 | return 0; |
mbed_official | 174:8bb9f3a33240 | 176 | } |
mbed_official | 174:8bb9f3a33240 | 177 | |
mbed_official | 174:8bb9f3a33240 | 178 | ADC_RegularChannelConfig(adc, channel, 1, ADC_SampleTime_4Cycles); |
mbed_official | 174:8bb9f3a33240 | 179 | |
mbed_official | 174:8bb9f3a33240 | 180 | ADC_SoftwareStartConv(adc); // Start conversion |
mbed_official | 174:8bb9f3a33240 | 181 | |
mbed_official | 174:8bb9f3a33240 | 182 | while (ADC_GetFlagStatus(adc, ADC_FLAG_EOC) == RESET); // Wait end of conversion |
mbed_official | 174:8bb9f3a33240 | 183 | |
mbed_official | 174:8bb9f3a33240 | 184 | return (ADC_GetConversionValue(adc)); // Get conversion value |
mbed_official | 76:aeb1df146756 | 185 | } |
mbed_official | 76:aeb1df146756 | 186 | |
mbed_official | 76:aeb1df146756 | 187 | uint16_t analogin_read_u16(analogin_t *obj) { |
mbed_official | 298:7557d401dbc3 | 188 | uint16_t value = adc_read(obj); |
mbed_official | 298:7557d401dbc3 | 189 | // 12-bit to 16-bit conversion |
mbed_official | 298:7557d401dbc3 | 190 | value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F); |
mbed_official | 298:7557d401dbc3 | 191 | return value; |
mbed_official | 76:aeb1df146756 | 192 | } |
mbed_official | 76:aeb1df146756 | 193 | |
mbed_official | 76:aeb1df146756 | 194 | float analogin_read(analogin_t *obj) { |
mbed_official | 174:8bb9f3a33240 | 195 | uint16_t value = adc_read(obj); |
mbed_official | 174:8bb9f3a33240 | 196 | return (float)value * (1.0f / (float)0xFFF); // 12 bits range |
mbed_official | 76:aeb1df146756 | 197 | } |
mbed_official | 76:aeb1df146756 | 198 | |
mbed_official | 76:aeb1df146756 | 199 | #endif |