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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c@621:9c82b0f79f3d, 2015-09-11 (annotated)

Committer:
mbed_official
Date:
Fri Sep 11 09:30:09 2015 +0100
Revision:
621:9c82b0f79f3d
Parent:
460:3bcf9be0332c 
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538



Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/



ignore target files not supported by the yotta module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 390:35c2c1cf29cd 1 /* mbed Microcontroller Library
mbed_official 390:35c2c1cf29cd 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 390:35c2c1cf29cd 3 *
mbed_official 390:35c2c1cf29cd 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 390:35c2c1cf29cd 5 * you may not use this file except in compliance with the License.
mbed_official 390:35c2c1cf29cd 6 * You may obtain a copy of the License at
mbed_official 390:35c2c1cf29cd 7 *
mbed_official 390:35c2c1cf29cd 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 390:35c2c1cf29cd 9 *
mbed_official 390:35c2c1cf29cd 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 390:35c2c1cf29cd 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 390:35c2c1cf29cd 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 390:35c2c1cf29cd 13 * See the License for the specific language governing permissions and
mbed_official 390:35c2c1cf29cd 14 * limitations under the License.
mbed_official 390:35c2c1cf29cd 15 */
mbed_official 390:35c2c1cf29cd 16 #include "mbed_assert.h"
mbed_official 390:35c2c1cf29cd 17 #include "analogin_api.h"
mbed_official 390:35c2c1cf29cd 18
mbed_official 390:35c2c1cf29cd 19 #include "cmsis.h"
mbed_official 390:35c2c1cf29cd 20 #include "pinmap.h"
mbed_official 390:35c2c1cf29cd 21
mbed_official 390:35c2c1cf29cd 22 #include "adc_iodefine.h"
mbed_official 390:35c2c1cf29cd 23 #include "cpg_iodefine.h"
mbed_official 390:35c2c1cf29cd 24
mbed_official 460:3bcf9be0332c 25 #define ANALOGIN_MEDIAN_FILTER 0
mbed_official 390:35c2c1cf29cd 26
mbed_official 390:35c2c1cf29cd 27 static const PinMap PinMap_ADC[] = {
mbed_official 390:35c2c1cf29cd 28 {P1_8, AN0, 1},
mbed_official 390:35c2c1cf29cd 29 {P1_9, AN1, 1},
mbed_official 390:35c2c1cf29cd 30 {P1_10, AN2, 1},
mbed_official 390:35c2c1cf29cd 31 {P1_11, AN3, 1},
mbed_official 460:3bcf9be0332c 32 {P1_12, AN3, 1},
mbed_official 390:35c2c1cf29cd 33 {P1_13, AN5, 1},
mbed_official 460:3bcf9be0332c 34 {P1_14, AN5, 1},
mbed_official 390:35c2c1cf29cd 35 {P1_15, AN7, 1},
mbed_official 460:3bcf9be0332c 36 {NC, NC, 0}
mbed_official 390:35c2c1cf29cd 37 };
mbed_official 390:35c2c1cf29cd 38
mbed_official 390:35c2c1cf29cd 39 static volatile uint16_t *ADCDR[] = {
mbed_official 390:35c2c1cf29cd 40 &ADCADDRA,
mbed_official 390:35c2c1cf29cd 41 &ADCADDRB,
mbed_official 390:35c2c1cf29cd 42 &ADCADDRC,
mbed_official 390:35c2c1cf29cd 43 &ADCADDRD,
mbed_official 390:35c2c1cf29cd 44 &ADCADDRE,
mbed_official 390:35c2c1cf29cd 45 &ADCADDRF,
mbed_official 390:35c2c1cf29cd 46 &ADCADDRG,
mbed_official 390:35c2c1cf29cd 47 &ADCADDRH,
mbed_official 390:35c2c1cf29cd 48 };
mbed_official 390:35c2c1cf29cd 49
mbed_official 390:35c2c1cf29cd 50 void analogin_init(analogin_t *obj, PinName pin) {
mbed_official 390:35c2c1cf29cd 51 obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
mbed_official 390:35c2c1cf29cd 52 MBED_ASSERT(obj->adc != (ADCName)NC);
mbed_official 460:3bcf9be0332c 53
mbed_official 390:35c2c1cf29cd 54 CPGSTBCR3 &= ~(1 << 1);
mbed_official 390:35c2c1cf29cd 55 CPGSTBCR6 &= ~(1 << 7);
mbed_official 390:35c2c1cf29cd 56
mbed_official 460:3bcf9be0332c 57 // 15: ADF 14: ADIE 13: ADST, [12:9] TRGS..0
mbed_official 460:3bcf9be0332c 58 // [8:6] CKS 010 :: 340tclk
mbed_official 460:3bcf9be0332c 59 // [5:3] MDS 000 :: single mode
mbed_official 460:3bcf9be0332c 60 // [2:0] CH 000 :: AN0
mbed_official 460:3bcf9be0332c 61 ADCADCSR = 0x0080;
mbed_official 409:a95c696104d3 62
mbed_official 460:3bcf9be0332c 63 pinmap_pinout(pin, PinMap_ADC);
mbed_official 390:35c2c1cf29cd 64 }
mbed_official 390:35c2c1cf29cd 65
mbed_official 390:35c2c1cf29cd 66 static inline uint32_t adc_read(analogin_t *obj) {
mbed_official 460:3bcf9be0332c 67 volatile uint16_t data;
mbed_official 460:3bcf9be0332c 68
mbed_official 390:35c2c1cf29cd 69 // Select the appropriate channel and start conversion
mbed_official 409:a95c696104d3 70 ADCADCSR &= 0xfff8;
mbed_official 460:3bcf9be0332c 71 ADCADCSR |= (1 << 13 | (obj->adc & 0x7));
mbed_official 460:3bcf9be0332c 72
mbed_official 460:3bcf9be0332c 73 // Wait end of conversion
mbed_official 460:3bcf9be0332c 74 do {
mbed_official 460:3bcf9be0332c 75 data = ADCADCSR;
mbed_official 460:3bcf9be0332c 76 } while (((data & (1 << 15)) == 0) || ((data & (1 << 13)) != 0));
mbed_official 460:3bcf9be0332c 77
mbed_official 390:35c2c1cf29cd 78 // clear flag
mbed_official 390:35c2c1cf29cd 79 ADCADCSR &= ~(1 << 15);
mbed_official 460:3bcf9be0332c 80
mbed_official 460:3bcf9be0332c 81 return ((*(ADCDR[obj->adc])) >> 4) & 0x0FFF; // 12 bits range
mbed_official 390:35c2c1cf29cd 82 }
mbed_official 390:35c2c1cf29cd 83
mbed_official 460:3bcf9be0332c 84 #if ANALOGIN_MEDIAN_FILTER
mbed_official 390:35c2c1cf29cd 85 static inline void order(uint32_t *a, uint32_t *b) {
mbed_official 390:35c2c1cf29cd 86 if (*a > *b) {
mbed_official 390:35c2c1cf29cd 87 uint32_t t = *a;
mbed_official 390:35c2c1cf29cd 88 *a = *b;
mbed_official 390:35c2c1cf29cd 89 *b = t;
mbed_official 390:35c2c1cf29cd 90 }
mbed_official 390:35c2c1cf29cd 91 }
mbed_official 460:3bcf9be0332c 92 #endif
mbed_official 390:35c2c1cf29cd 93
mbed_official 390:35c2c1cf29cd 94 static inline uint32_t adc_read_u32(analogin_t *obj) {
mbed_official 390:35c2c1cf29cd 95 uint32_t value;
mbed_official 390:35c2c1cf29cd 96 #if ANALOGIN_MEDIAN_FILTER
mbed_official 390:35c2c1cf29cd 97 uint32_t v1 = adc_read(obj);
mbed_official 390:35c2c1cf29cd 98 uint32_t v2 = adc_read(obj);
mbed_official 390:35c2c1cf29cd 99 uint32_t v3 = adc_read(obj);
mbed_official 390:35c2c1cf29cd 100 order(&v1, &v2);
mbed_official 390:35c2c1cf29cd 101 order(&v2, &v3);
mbed_official 390:35c2c1cf29cd 102 order(&v1, &v2);
mbed_official 390:35c2c1cf29cd 103 value = v2;
mbed_official 390:35c2c1cf29cd 104 #else
mbed_official 390:35c2c1cf29cd 105 value = adc_read(obj);
mbed_official 390:35c2c1cf29cd 106 #endif
mbed_official 390:35c2c1cf29cd 107 return value;
mbed_official 390:35c2c1cf29cd 108 }
mbed_official 390:35c2c1cf29cd 109
mbed_official 390:35c2c1cf29cd 110 uint16_t analogin_read_u16(analogin_t *obj) {
mbed_official 390:35c2c1cf29cd 111 uint32_t value = adc_read_u32(obj);
mbed_official 460:3bcf9be0332c 112
mbed_official 460:3bcf9be0332c 113 return (value << 4) | ((value >> 8) & 0x000F); // 12-bit to 16-bit conversion
mbed_official 390:35c2c1cf29cd 114 }
mbed_official 390:35c2c1cf29cd 115
mbed_official 390:35c2c1cf29cd 116 float analogin_read(analogin_t *obj) {
mbed_official 390:35c2c1cf29cd 117 uint32_t value = adc_read_u32(obj);
mbed_official 460:3bcf9be0332c 118
mbed_official 460:3bcf9be0332c 119 return (float)value * (1.0f / (float)0x0FFF); // 12 bits range
mbed_official 390:35c2c1cf29cd 120 }