Jonathan Piat / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_WIZNET/TARGET_W7500x/analogin_api.c@563:9f26fcd0c9ce, 2015-06-09 (annotated)

Committer:
mbed_official
Date:
Tue Jun 09 15:30:08 2015 +0100
Revision:
563:9f26fcd0c9ce
Parent:
558:0880f51c4036 
Synchronized with git revision a140fc60a6f74003a3d46c4ce8bf8c742148b9fd



Full URL: https://github.com/mbedmicro/mbed/commit/a140fc60a6f74003a3d46c4ce8bf8c742148b9fd/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 558:0880f51c4036 1 /* mbed Microcontroller Library
mbed_official 558:0880f51c4036 2 *******************************************************************************
mbed_official 558:0880f51c4036 3 * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
mbed_official 558:0880f51c4036 4 * All rights reserved.
mbed_official 558:0880f51c4036 5 *
mbed_official 558:0880f51c4036 6 * Redistribution and use in source and binary forms, with or without
mbed_official 558:0880f51c4036 7 * modification, are permitted provided that the following conditions are met:
mbed_official 558:0880f51c4036 8 *
mbed_official 558:0880f51c4036 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 558:0880f51c4036 10 * this list of conditions and the following disclaimer.
mbed_official 558:0880f51c4036 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 558:0880f51c4036 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 558:0880f51c4036 13 * and/or other materials provided with the distribution.
mbed_official 558:0880f51c4036 14 * 3. Neither the name of ARM Limited nor the names of its contributors
mbed_official 558:0880f51c4036 15 * may be used to endorse or promote products derived from this software
mbed_official 558:0880f51c4036 16 * without specific prior written permission.
mbed_official 558:0880f51c4036 17 *
mbed_official 558:0880f51c4036 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 558:0880f51c4036 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 558:0880f51c4036 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 558:0880f51c4036 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 558:0880f51c4036 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 558:0880f51c4036 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 558:0880f51c4036 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 558:0880f51c4036 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 558:0880f51c4036 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 558:0880f51c4036 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 558:0880f51c4036 28 *******************************************************************************
mbed_official 558:0880f51c4036 29 */
mbed_official 558:0880f51c4036 30
mbed_official 558:0880f51c4036 31 #include "mbed_assert.h"
mbed_official 558:0880f51c4036 32 #include "analogin_api.h"
mbed_official 558:0880f51c4036 33
mbed_official 558:0880f51c4036 34 #if DEVICE_ANALOGIN
mbed_official 558:0880f51c4036 35
mbed_official 558:0880f51c4036 36 #include "wait_api.h"
mbed_official 558:0880f51c4036 37 #include "cmsis.h"
mbed_official 558:0880f51c4036 38 #include "pinmap.h"
mbed_official 558:0880f51c4036 39 #include "PeripheralPins.h"
mbed_official 558:0880f51c4036 40
mbed_official 558:0880f51c4036 41
mbed_official 558:0880f51c4036 42 ADC_TypeDef * AdcHandle;
mbed_official 558:0880f51c4036 43
mbed_official 558:0880f51c4036 44 static int adc_inited = 0;
mbed_official 558:0880f51c4036 45
mbed_official 558:0880f51c4036 46 void analogin_init(analogin_t *obj, PinName pin)
mbed_official 558:0880f51c4036 47 {
mbed_official 558:0880f51c4036 48 // Get the peripheral name from the pin and assign it to the object
mbed_official 558:0880f51c4036 49 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 558:0880f51c4036 50
mbed_official 558:0880f51c4036 51 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 558:0880f51c4036 52
mbed_official 558:0880f51c4036 53 // Configure GPIO
mbed_official 558:0880f51c4036 54 pinmap_pinout(pin, PinMap_ADC);
mbed_official 558:0880f51c4036 55
mbed_official 558:0880f51c4036 56 // Save pin number for the read function
mbed_official 558:0880f51c4036 57 obj->pin = pin;
mbed_official 558:0880f51c4036 58
mbed_official 558:0880f51c4036 59 // The ADC initialization is done once
mbed_official 558:0880f51c4036 60 if (adc_inited == 0) {
mbed_official 558:0880f51c4036 61 adc_inited = 1;
mbed_official 558:0880f51c4036 62
mbed_official 558:0880f51c4036 63 ADC_Init();
mbed_official 558:0880f51c4036 64 }
mbed_official 558:0880f51c4036 65 }
mbed_official 558:0880f51c4036 66
mbed_official 558:0880f51c4036 67 static inline uint16_t adc_read(analogin_t *obj)
mbed_official 558:0880f51c4036 68 {
mbed_official 558:0880f51c4036 69 ADC_CH adc_ch;
mbed_official 558:0880f51c4036 70
mbed_official 558:0880f51c4036 71 switch (obj->pin) {
mbed_official 558:0880f51c4036 72 case PC_15:
mbed_official 558:0880f51c4036 73 adc_ch = ADC_CH0;
mbed_official 558:0880f51c4036 74 break;
mbed_official 558:0880f51c4036 75 case PC_14:
mbed_official 558:0880f51c4036 76 adc_ch = ADC_CH1;
mbed_official 558:0880f51c4036 77 break;
mbed_official 558:0880f51c4036 78 case PC_13:
mbed_official 558:0880f51c4036 79 adc_ch = ADC_CH2;
mbed_official 558:0880f51c4036 80 break;
mbed_official 558:0880f51c4036 81 case PC_12:
mbed_official 558:0880f51c4036 82 adc_ch = ADC_CH3;
mbed_official 558:0880f51c4036 83 break;
mbed_official 558:0880f51c4036 84 case PC_11:
mbed_official 558:0880f51c4036 85 adc_ch = ADC_CH4;
mbed_official 558:0880f51c4036 86 break;
mbed_official 558:0880f51c4036 87 case PC_10:
mbed_official 558:0880f51c4036 88 adc_ch = ADC_CH5;
mbed_official 558:0880f51c4036 89 break;
mbed_official 558:0880f51c4036 90 default:
mbed_official 558:0880f51c4036 91 return 0;
mbed_official 558:0880f51c4036 92 }
mbed_official 558:0880f51c4036 93
mbed_official 558:0880f51c4036 94 ADC_ChannelSelect(adc_ch);
mbed_official 558:0880f51c4036 95 ADC_Start();
mbed_official 558:0880f51c4036 96
mbed_official 558:0880f51c4036 97 // Wait end of conversion and get value
mbed_official 558:0880f51c4036 98 while(ADC_IsInterrupt());
mbed_official 558:0880f51c4036 99 return ADC_ReadData();
mbed_official 558:0880f51c4036 100 }
mbed_official 558:0880f51c4036 101
mbed_official 558:0880f51c4036 102 uint16_t analogin_read_u16(analogin_t *obj)
mbed_official 558:0880f51c4036 103 {
mbed_official 558:0880f51c4036 104 uint16_t value = adc_read(obj);
mbed_official 558:0880f51c4036 105 // 12-bit to 16-bit conversion
mbed_official 558:0880f51c4036 106 return value;
mbed_official 558:0880f51c4036 107 }
mbed_official 558:0880f51c4036 108
mbed_official 558:0880f51c4036 109 float analogin_read(analogin_t *obj)
mbed_official 558:0880f51c4036 110 {
mbed_official 558:0880f51c4036 111 uint16_t value = adc_read(obj);
mbed_official 558:0880f51c4036 112
mbed_official 558:0880f51c4036 113 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
mbed_official 558:0880f51c4036 114 }
mbed_official 558:0880f51c4036 115
mbed_official 558:0880f51c4036 116 #endif