Cortex Challenge Team / mbed-src

mbed library sources for small microcontrollers such as STM32F050F6P6 (with 4 kB RAM)

Dependents:   STM32F031_blink_LED_1

Fork of mbed-src by mbed official

targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c@460:3bcf9be0332c, 2015-02-02 (annotated)

Committer:
mbed_official
Date:
Mon Feb 02 11:30:07 2015 +0000
Revision:
460:3bcf9be0332c
Parent:
409:a95c696104d3 
Synchronized with git revision c53fab9e3c2bcc48a6431a4222a43197c18a8c7b



Full URL: https://github.com/mbedmicro/mbed/commit/c53fab9e3c2bcc48a6431a4222a43197c18a8c7b/



RZ_A1H - Add some function and fix some bugs.

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 }