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Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_WIZNET/TARGET_W7500x/analogin_api.c@1:f30bdcd2b33b, 2017-02-27 (annotated)

Committer:
jacobjohnson
Date:
Mon Feb 27 17:45:05 2017 +0000
Revision:
1:f30bdcd2b33b
Parent:
0:098463de4c5d 
changed the inputscale from 1 to 7 in analogin_api.c.  This will need to be changed later, and accessed from the main level, but for now this allows the  adc to read a value from 0 to 3.7V, instead of just up to 1V.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 *******************************************************************************
group-onsemi 0:098463de4c5d 3 * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
group-onsemi 0:098463de4c5d 4 * All rights reserved.
group-onsemi 0:098463de4c5d 5 *
group-onsemi 0:098463de4c5d 6 * Redistribution and use in source and binary forms, with or without
group-onsemi 0:098463de4c5d 7 * modification, are permitted provided that the following conditions are met:
group-onsemi 0:098463de4c5d 8 *
group-onsemi 0:098463de4c5d 9 * 1. Redistributions of source code must retain the above copyright notice,
group-onsemi 0:098463de4c5d 10 * this list of conditions and the following disclaimer.
group-onsemi 0:098463de4c5d 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
group-onsemi 0:098463de4c5d 12 * this list of conditions and the following disclaimer in the documentation
group-onsemi 0:098463de4c5d 13 * and/or other materials provided with the distribution.
group-onsemi 0:098463de4c5d 14 * 3. Neither the name of ARM Limited nor the names of its contributors
group-onsemi 0:098463de4c5d 15 * may be used to endorse or promote products derived from this software
group-onsemi 0:098463de4c5d 16 * without specific prior written permission.
group-onsemi 0:098463de4c5d 17 *
group-onsemi 0:098463de4c5d 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
group-onsemi 0:098463de4c5d 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
group-onsemi 0:098463de4c5d 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
group-onsemi 0:098463de4c5d 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
group-onsemi 0:098463de4c5d 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
group-onsemi 0:098463de4c5d 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
group-onsemi 0:098463de4c5d 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
group-onsemi 0:098463de4c5d 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
group-onsemi 0:098463de4c5d 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
group-onsemi 0:098463de4c5d 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
group-onsemi 0:098463de4c5d 28 *******************************************************************************
group-onsemi 0:098463de4c5d 29 */
group-onsemi 0:098463de4c5d 30
group-onsemi 0:098463de4c5d 31 #include "mbed_assert.h"
group-onsemi 0:098463de4c5d 32 #include "analogin_api.h"
group-onsemi 0:098463de4c5d 33
group-onsemi 0:098463de4c5d 34 #if DEVICE_ANALOGIN
group-onsemi 0:098463de4c5d 35
group-onsemi 0:098463de4c5d 36 #include "wait_api.h"
group-onsemi 0:098463de4c5d 37 #include "cmsis.h"
group-onsemi 0:098463de4c5d 38 #include "pinmap.h"
group-onsemi 0:098463de4c5d 39 #include "W7500x_adc.h"
group-onsemi 0:098463de4c5d 40 #include "PeripheralPins.h"
group-onsemi 0:098463de4c5d 41
group-onsemi 0:098463de4c5d 42
group-onsemi 0:098463de4c5d 43 ADC_TypeDef * AdcHandle;
group-onsemi 0:098463de4c5d 44
group-onsemi 0:098463de4c5d 45 static int adc_inited = 0;
group-onsemi 0:098463de4c5d 46
group-onsemi 0:098463de4c5d 47 void analogin_init(analogin_t *obj, PinName pin)
group-onsemi 0:098463de4c5d 48 {
group-onsemi 0:098463de4c5d 49 // Get the peripheral name from the pin and assign it to the object
group-onsemi 0:098463de4c5d 50 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
group-onsemi 0:098463de4c5d 51
group-onsemi 0:098463de4c5d 52 MBED_ASSERT(obj->adc != (ADCName)NC);
group-onsemi 0:098463de4c5d 53
group-onsemi 0:098463de4c5d 54 // Configure GPIO
group-onsemi 0:098463de4c5d 55 pinmap_pinout(pin, PinMap_ADC);
group-onsemi 0:098463de4c5d 56
group-onsemi 0:098463de4c5d 57 // Save pin number for the read function
group-onsemi 0:098463de4c5d 58 obj->pin = pin;
group-onsemi 0:098463de4c5d 59
group-onsemi 0:098463de4c5d 60 // The ADC initialization is done once
group-onsemi 0:098463de4c5d 61 if (adc_inited == 0) {
group-onsemi 0:098463de4c5d 62 adc_inited = 1;
group-onsemi 0:098463de4c5d 63
group-onsemi 0:098463de4c5d 64 ADC_Init();
group-onsemi 0:098463de4c5d 65 }
group-onsemi 0:098463de4c5d 66 }
group-onsemi 0:098463de4c5d 67
group-onsemi 0:098463de4c5d 68 static inline uint16_t adc_read(analogin_t *obj)
group-onsemi 0:098463de4c5d 69 {
group-onsemi 0:098463de4c5d 70 ADC_CH adc_ch;
group-onsemi 0:098463de4c5d 71
group-onsemi 0:098463de4c5d 72 switch (obj->pin) {
group-onsemi 0:098463de4c5d 73 case PC_15:
group-onsemi 0:098463de4c5d 74 adc_ch = ADC_CH0;
group-onsemi 0:098463de4c5d 75 break;
group-onsemi 0:098463de4c5d 76 case PC_14:
group-onsemi 0:098463de4c5d 77 adc_ch = ADC_CH1;
group-onsemi 0:098463de4c5d 78 break;
group-onsemi 0:098463de4c5d 79 case PC_13:
group-onsemi 0:098463de4c5d 80 adc_ch = ADC_CH2;
group-onsemi 0:098463de4c5d 81 break;
group-onsemi 0:098463de4c5d 82 case PC_12:
group-onsemi 0:098463de4c5d 83 adc_ch = ADC_CH3;
group-onsemi 0:098463de4c5d 84 break;
group-onsemi 0:098463de4c5d 85 case PC_11:
group-onsemi 0:098463de4c5d 86 adc_ch = ADC_CH4;
group-onsemi 0:098463de4c5d 87 break;
group-onsemi 0:098463de4c5d 88 case PC_10:
group-onsemi 0:098463de4c5d 89 adc_ch = ADC_CH5;
group-onsemi 0:098463de4c5d 90 break;
group-onsemi 0:098463de4c5d 91 default:
group-onsemi 0:098463de4c5d 92 return 0;
group-onsemi 0:098463de4c5d 93 }
group-onsemi 0:098463de4c5d 94
group-onsemi 0:098463de4c5d 95 ADC_ChannelSelect(adc_ch);
group-onsemi 0:098463de4c5d 96 ADC_Start();
group-onsemi 0:098463de4c5d 97
group-onsemi 0:098463de4c5d 98 // Wait end of conversion and get value
group-onsemi 0:098463de4c5d 99 while(ADC_IsInterrupt());
group-onsemi 0:098463de4c5d 100 return ADC_ReadData();
group-onsemi 0:098463de4c5d 101 }
group-onsemi 0:098463de4c5d 102
group-onsemi 0:098463de4c5d 103 uint16_t analogin_read_u16(analogin_t *obj)
group-onsemi 0:098463de4c5d 104 {
group-onsemi 0:098463de4c5d 105 uint16_t value = adc_read(obj);
group-onsemi 0:098463de4c5d 106 // 12-bit to 16-bit conversion
group-onsemi 0:098463de4c5d 107 return value;
group-onsemi 0:098463de4c5d 108 }
group-onsemi 0:098463de4c5d 109
group-onsemi 0:098463de4c5d 110 float analogin_read(analogin_t *obj)
group-onsemi 0:098463de4c5d 111 {
group-onsemi 0:098463de4c5d 112 uint16_t value = adc_read(obj);
group-onsemi 0:098463de4c5d 113
group-onsemi 0:098463de4c5d 114 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
group-onsemi 0:098463de4c5d 115 }
group-onsemi 0:098463de4c5d 116
group-onsemi 0:098463de4c5d 117 #endif