teralytic / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed by teralytic

targets/hal/TARGET_WIZNET/TARGET_W7500x/analogin_api.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 *******************************************************************************
bogdanm 0:9b334a45a8ff 3 * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
bogdanm 0:9b334a45a8ff 4 * All rights reserved.
bogdanm 0:9b334a45a8ff 5 *
bogdanm 0:9b334a45a8ff 6 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 7 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 10 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 12 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 13 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 14 * 3. Neither the name of ARM Limited nor the names of its contributors
bogdanm 0:9b334a45a8ff 15 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 16 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 17 *
bogdanm 0:9b334a45a8ff 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 28 *******************************************************************************
bogdanm 0:9b334a45a8ff 29 */
bogdanm 0:9b334a45a8ff 30
bogdanm 0:9b334a45a8ff 31 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 32 #include "analogin_api.h"
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34 #if DEVICE_ANALOGIN
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 #include "wait_api.h"
bogdanm 0:9b334a45a8ff 37 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 38 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 39 #include "W7500x_adc.h"
bogdanm 0:9b334a45a8ff 40 #include "PeripheralPins.h"
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 ADC_TypeDef * AdcHandle;
bogdanm 0:9b334a45a8ff 44
bogdanm 0:9b334a45a8ff 45 static int adc_inited = 0;
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 void analogin_init(analogin_t *obj, PinName pin)
bogdanm 0:9b334a45a8ff 48 {
bogdanm 0:9b334a45a8ff 49 // Get the peripheral name from the pin and assign it to the object
bogdanm 0:9b334a45a8ff 50 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
bogdanm 0:9b334a45a8ff 51
bogdanm 0:9b334a45a8ff 52 MBED_ASSERT(obj->adc != (ADCName)NC);
bogdanm 0:9b334a45a8ff 53
bogdanm 0:9b334a45a8ff 54 // Configure GPIO
bogdanm 0:9b334a45a8ff 55 pinmap_pinout(pin, PinMap_ADC);
bogdanm 0:9b334a45a8ff 56
bogdanm 0:9b334a45a8ff 57 // Save pin number for the read function
bogdanm 0:9b334a45a8ff 58 obj->pin = pin;
bogdanm 0:9b334a45a8ff 59
bogdanm 0:9b334a45a8ff 60 // The ADC initialization is done once
bogdanm 0:9b334a45a8ff 61 if (adc_inited == 0) {
bogdanm 0:9b334a45a8ff 62 adc_inited = 1;
bogdanm 0:9b334a45a8ff 63
bogdanm 0:9b334a45a8ff 64 ADC_Init();
bogdanm 0:9b334a45a8ff 65 }
bogdanm 0:9b334a45a8ff 66 }
bogdanm 0:9b334a45a8ff 67
bogdanm 0:9b334a45a8ff 68 static inline uint16_t adc_read(analogin_t *obj)
bogdanm 0:9b334a45a8ff 69 {
bogdanm 0:9b334a45a8ff 70 ADC_CH adc_ch;
bogdanm 0:9b334a45a8ff 71
bogdanm 0:9b334a45a8ff 72 switch (obj->pin) {
bogdanm 0:9b334a45a8ff 73 case PC_15:
bogdanm 0:9b334a45a8ff 74 adc_ch = ADC_CH0;
bogdanm 0:9b334a45a8ff 75 break;
bogdanm 0:9b334a45a8ff 76 case PC_14:
bogdanm 0:9b334a45a8ff 77 adc_ch = ADC_CH1;
bogdanm 0:9b334a45a8ff 78 break;
bogdanm 0:9b334a45a8ff 79 case PC_13:
bogdanm 0:9b334a45a8ff 80 adc_ch = ADC_CH2;
bogdanm 0:9b334a45a8ff 81 break;
bogdanm 0:9b334a45a8ff 82 case PC_12:
bogdanm 0:9b334a45a8ff 83 adc_ch = ADC_CH3;
bogdanm 0:9b334a45a8ff 84 break;
bogdanm 0:9b334a45a8ff 85 case PC_11:
bogdanm 0:9b334a45a8ff 86 adc_ch = ADC_CH4;
bogdanm 0:9b334a45a8ff 87 break;
bogdanm 0:9b334a45a8ff 88 case PC_10:
bogdanm 0:9b334a45a8ff 89 adc_ch = ADC_CH5;
bogdanm 0:9b334a45a8ff 90 break;
bogdanm 0:9b334a45a8ff 91 default:
bogdanm 0:9b334a45a8ff 92 return 0;
bogdanm 0:9b334a45a8ff 93 }
bogdanm 0:9b334a45a8ff 94
bogdanm 0:9b334a45a8ff 95 ADC_ChannelSelect(adc_ch);
bogdanm 0:9b334a45a8ff 96 ADC_Start();
bogdanm 0:9b334a45a8ff 97
bogdanm 0:9b334a45a8ff 98 // Wait end of conversion and get value
bogdanm 0:9b334a45a8ff 99 while(ADC_IsInterrupt());
bogdanm 0:9b334a45a8ff 100 return ADC_ReadData();
bogdanm 0:9b334a45a8ff 101 }
bogdanm 0:9b334a45a8ff 102
bogdanm 0:9b334a45a8ff 103 uint16_t analogin_read_u16(analogin_t *obj)
bogdanm 0:9b334a45a8ff 104 {
bogdanm 0:9b334a45a8ff 105 uint16_t value = adc_read(obj);
bogdanm 0:9b334a45a8ff 106 // 12-bit to 16-bit conversion
bogdanm 0:9b334a45a8ff 107 return value;
bogdanm 0:9b334a45a8ff 108 }
bogdanm 0:9b334a45a8ff 109
bogdanm 0:9b334a45a8ff 110 float analogin_read(analogin_t *obj)
bogdanm 0:9b334a45a8ff 111 {
bogdanm 0:9b334a45a8ff 112 uint16_t value = adc_read(obj);
bogdanm 0:9b334a45a8ff 113
bogdanm 0:9b334a45a8ff 114 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
bogdanm 0:9b334a45a8ff 115 }
bogdanm 0:9b334a45a8ff 116
bogdanm 0:9b334a45a8ff 117 #endif