Umar Naeem / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by Umar Naeem

targets/TARGET_WIZNET/TARGET_W7500x/analogin_api.c@165:2dd56e6daeec, 2017-05-23 (annotated)

Committer:
ranaumarnaeem
Date:
Tue May 23 12:54:50 2017 +0000
Revision:
165:2dd56e6daeec
Parent:
160:d5399cc887bb 
jhjg

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 *******************************************************************************
<> 144:ef7eb2e8f9f7 3 * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
<> 144:ef7eb2e8f9f7 4 * All rights reserved.
<> 144:ef7eb2e8f9f7 5 *
<> 144:ef7eb2e8f9f7 6 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 7 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 10 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 12 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 13 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 14 * 3. Neither the name of ARM Limited nor the names of its contributors
<> 144:ef7eb2e8f9f7 15 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 16 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 17 *
<> 144:ef7eb2e8f9f7 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 28 *******************************************************************************
<> 144:ef7eb2e8f9f7 29 */
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 32 #include "analogin_api.h"
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 #if DEVICE_ANALOGIN
<> 144:ef7eb2e8f9f7 35
<> 160:d5399cc887bb 36 #include "mbed_wait_api.h"
<> 144:ef7eb2e8f9f7 37 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 38 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 39 #include "W7500x_adc.h"
<> 144:ef7eb2e8f9f7 40 #include "PeripheralPins.h"
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 ADC_TypeDef * AdcHandle;
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 static int adc_inited = 0;
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 void analogin_init(analogin_t *obj, PinName pin)
<> 144:ef7eb2e8f9f7 48 {
<> 144:ef7eb2e8f9f7 49 // Get the peripheral name from the pin and assign it to the object
<> 144:ef7eb2e8f9f7 50 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 MBED_ASSERT(obj->adc != (ADCName)NC);
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 // Configure GPIO
<> 144:ef7eb2e8f9f7 55 pinmap_pinout(pin, PinMap_ADC);
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 // Save pin number for the read function
<> 144:ef7eb2e8f9f7 58 obj->pin = pin;
<> 144:ef7eb2e8f9f7 59
<> 144:ef7eb2e8f9f7 60 // The ADC initialization is done once
<> 144:ef7eb2e8f9f7 61 if (adc_inited == 0) {
<> 144:ef7eb2e8f9f7 62 adc_inited = 1;
<> 144:ef7eb2e8f9f7 63
<> 144:ef7eb2e8f9f7 64 ADC_Init();
<> 144:ef7eb2e8f9f7 65 }
<> 144:ef7eb2e8f9f7 66 }
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 static inline uint16_t adc_read(analogin_t *obj)
<> 144:ef7eb2e8f9f7 69 {
<> 144:ef7eb2e8f9f7 70 ADC_CH adc_ch;
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 switch (obj->pin) {
<> 144:ef7eb2e8f9f7 73 case PC_15:
<> 144:ef7eb2e8f9f7 74 adc_ch = ADC_CH0;
<> 144:ef7eb2e8f9f7 75 break;
<> 144:ef7eb2e8f9f7 76 case PC_14:
<> 144:ef7eb2e8f9f7 77 adc_ch = ADC_CH1;
<> 144:ef7eb2e8f9f7 78 break;
<> 144:ef7eb2e8f9f7 79 case PC_13:
<> 144:ef7eb2e8f9f7 80 adc_ch = ADC_CH2;
<> 144:ef7eb2e8f9f7 81 break;
<> 144:ef7eb2e8f9f7 82 case PC_12:
<> 144:ef7eb2e8f9f7 83 adc_ch = ADC_CH3;
<> 144:ef7eb2e8f9f7 84 break;
<> 144:ef7eb2e8f9f7 85 case PC_11:
<> 144:ef7eb2e8f9f7 86 adc_ch = ADC_CH4;
<> 144:ef7eb2e8f9f7 87 break;
<> 144:ef7eb2e8f9f7 88 case PC_10:
<> 144:ef7eb2e8f9f7 89 adc_ch = ADC_CH5;
<> 144:ef7eb2e8f9f7 90 break;
<> 144:ef7eb2e8f9f7 91 default:
<> 144:ef7eb2e8f9f7 92 return 0;
<> 144:ef7eb2e8f9f7 93 }
<> 144:ef7eb2e8f9f7 94
<> 144:ef7eb2e8f9f7 95 ADC_ChannelSelect(adc_ch);
<> 144:ef7eb2e8f9f7 96 ADC_Start();
<> 144:ef7eb2e8f9f7 97
<> 144:ef7eb2e8f9f7 98 // Wait end of conversion and get value
<> 144:ef7eb2e8f9f7 99 while(ADC_IsInterrupt());
<> 144:ef7eb2e8f9f7 100 return ADC_ReadData();
<> 144:ef7eb2e8f9f7 101 }
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 uint16_t analogin_read_u16(analogin_t *obj)
<> 144:ef7eb2e8f9f7 104 {
<> 144:ef7eb2e8f9f7 105 uint16_t value = adc_read(obj);
<> 144:ef7eb2e8f9f7 106 // 12-bit to 16-bit conversion
<> 144:ef7eb2e8f9f7 107 return value;
<> 144:ef7eb2e8f9f7 108 }
<> 144:ef7eb2e8f9f7 109
<> 144:ef7eb2e8f9f7 110 float analogin_read(analogin_t *obj)
<> 144:ef7eb2e8f9f7 111 {
<> 144:ef7eb2e8f9f7 112 uint16_t value = adc_read(obj);
<> 144:ef7eb2e8f9f7 113
<> 144:ef7eb2e8f9f7 114 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
<> 144:ef7eb2e8f9f7 115 }
<> 144:ef7eb2e8f9f7 116
<> 144:ef7eb2e8f9f7 117 #endif