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targets/hal/TARGET_RENESAS/TARGET_VK_RZ_A1H/analogin_api.c@148:4802eb17e82b, 2016-10-17 (annotated)
- Committer:
- rodriguise
- Date:
- Mon Oct 17 18:47:01 2016 +0000
- Revision:
- 148:4802eb17e82b
- Parent:
- 119:3921aeca8633
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Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 119:3921aeca8633 | 1 | /* mbed Microcontroller Library |
mbed_official | 119:3921aeca8633 | 2 | * Copyright (c) 2006-2013 ARM Limited |
mbed_official | 119:3921aeca8633 | 3 | * |
mbed_official | 119:3921aeca8633 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 119:3921aeca8633 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 119:3921aeca8633 | 6 | * You may obtain a copy of the License at |
mbed_official | 119:3921aeca8633 | 7 | * |
mbed_official | 119:3921aeca8633 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 119:3921aeca8633 | 9 | * |
mbed_official | 119:3921aeca8633 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 119:3921aeca8633 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 119:3921aeca8633 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 119:3921aeca8633 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 119:3921aeca8633 | 14 | * limitations under the License. |
mbed_official | 119:3921aeca8633 | 15 | */ |
mbed_official | 119:3921aeca8633 | 16 | #include "mbed_assert.h" |
mbed_official | 119:3921aeca8633 | 17 | #include "analogin_api.h" |
mbed_official | 119:3921aeca8633 | 18 | |
mbed_official | 119:3921aeca8633 | 19 | #include "cmsis.h" |
mbed_official | 119:3921aeca8633 | 20 | #include "pinmap.h" |
mbed_official | 119:3921aeca8633 | 21 | |
mbed_official | 119:3921aeca8633 | 22 | #include "adc_iodefine.h" |
mbed_official | 119:3921aeca8633 | 23 | #include "cpg_iodefine.h" |
mbed_official | 119:3921aeca8633 | 24 | |
mbed_official | 119:3921aeca8633 | 25 | #define ANALOGIN_MEDIAN_FILTER 0 |
mbed_official | 119:3921aeca8633 | 26 | |
mbed_official | 119:3921aeca8633 | 27 | #ifdef MAX_PERI |
mbed_official | 119:3921aeca8633 | 28 | static const PinMap PinMap_ADC[] = { |
mbed_official | 119:3921aeca8633 | 29 | {P1_8, AN0, 1}, |
mbed_official | 119:3921aeca8633 | 30 | {P1_9, AN1, 1}, |
mbed_official | 119:3921aeca8633 | 31 | {P1_10, AN2, 1}, |
mbed_official | 119:3921aeca8633 | 32 | {P1_11, AN3, 1}, |
mbed_official | 119:3921aeca8633 | 33 | {P1_12, AN4, 1}, |
mbed_official | 119:3921aeca8633 | 34 | {P1_13, AN5, 1}, |
mbed_official | 119:3921aeca8633 | 35 | {P1_14, AN6, 1}, |
mbed_official | 119:3921aeca8633 | 36 | {P1_15, AN7, 1}, |
mbed_official | 119:3921aeca8633 | 37 | {NC, NC, 0} |
mbed_official | 119:3921aeca8633 | 38 | }; |
mbed_official | 119:3921aeca8633 | 39 | #else |
mbed_official | 119:3921aeca8633 | 40 | static const PinMap PinMap_ADC[] = { |
mbed_official | 119:3921aeca8633 | 41 | {P1_8, AN0, 1}, |
mbed_official | 119:3921aeca8633 | 42 | {P1_9, AN1, 1}, |
mbed_official | 119:3921aeca8633 | 43 | {P1_10, AN2, 1}, |
mbed_official | 119:3921aeca8633 | 44 | {P1_11, AN3, 1}, |
mbed_official | 119:3921aeca8633 | 45 | {P1_12, AN4, 1}, |
mbed_official | 119:3921aeca8633 | 46 | {P1_13, AN5, 1}, |
mbed_official | 119:3921aeca8633 | 47 | {P1_15, AN7, 1}, |
mbed_official | 119:3921aeca8633 | 48 | {NC, NC, 0} |
mbed_official | 119:3921aeca8633 | 49 | }; |
mbed_official | 119:3921aeca8633 | 50 | #endif |
mbed_official | 119:3921aeca8633 | 51 | |
mbed_official | 119:3921aeca8633 | 52 | static volatile uint16_t *ADCDR[] = { |
mbed_official | 119:3921aeca8633 | 53 | &ADCADDRA, |
mbed_official | 119:3921aeca8633 | 54 | &ADCADDRB, |
mbed_official | 119:3921aeca8633 | 55 | &ADCADDRC, |
mbed_official | 119:3921aeca8633 | 56 | &ADCADDRD, |
mbed_official | 119:3921aeca8633 | 57 | &ADCADDRE, |
mbed_official | 119:3921aeca8633 | 58 | &ADCADDRF, |
mbed_official | 119:3921aeca8633 | 59 | &ADCADDRG, |
mbed_official | 119:3921aeca8633 | 60 | &ADCADDRH, |
mbed_official | 119:3921aeca8633 | 61 | }; |
mbed_official | 119:3921aeca8633 | 62 | |
mbed_official | 119:3921aeca8633 | 63 | void analogin_init(analogin_t *obj, PinName pin) { |
mbed_official | 119:3921aeca8633 | 64 | obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); |
mbed_official | 119:3921aeca8633 | 65 | MBED_ASSERT(obj->adc != (ADCName)NC); |
mbed_official | 119:3921aeca8633 | 66 | |
mbed_official | 119:3921aeca8633 | 67 | CPGSTBCR3 &= ~(1 << 1); |
mbed_official | 119:3921aeca8633 | 68 | CPGSTBCR6 &= ~(1 << 7); |
mbed_official | 119:3921aeca8633 | 69 | |
mbed_official | 119:3921aeca8633 | 70 | // 15: ADF 14: ADIE 13: ADST, [12:9] TRGS..0 |
mbed_official | 119:3921aeca8633 | 71 | // [8:6] CKS 010 :: 340tclk |
mbed_official | 119:3921aeca8633 | 72 | // [5:3] MDS 000 :: single mode |
mbed_official | 119:3921aeca8633 | 73 | // [2:0] CH 000 :: AN0 |
mbed_official | 119:3921aeca8633 | 74 | ADCADCSR = 0x0080; |
mbed_official | 119:3921aeca8633 | 75 | |
mbed_official | 119:3921aeca8633 | 76 | pinmap_pinout(pin, PinMap_ADC); |
mbed_official | 119:3921aeca8633 | 77 | } |
mbed_official | 119:3921aeca8633 | 78 | |
mbed_official | 119:3921aeca8633 | 79 | static inline uint32_t adc_read(analogin_t *obj) { |
mbed_official | 119:3921aeca8633 | 80 | volatile uint16_t data; |
mbed_official | 119:3921aeca8633 | 81 | |
mbed_official | 119:3921aeca8633 | 82 | // Select the appropriate channel and start conversion |
mbed_official | 119:3921aeca8633 | 83 | ADCADCSR &= 0xfff8; |
mbed_official | 119:3921aeca8633 | 84 | ADCADCSR |= (1 << 13 | (obj->adc & 0x7)); |
mbed_official | 119:3921aeca8633 | 85 | |
mbed_official | 119:3921aeca8633 | 86 | // Wait end of conversion |
mbed_official | 119:3921aeca8633 | 87 | do { |
mbed_official | 119:3921aeca8633 | 88 | data = ADCADCSR; |
mbed_official | 119:3921aeca8633 | 89 | } while (((data & (1 << 15)) == 0) || ((data & (1 << 13)) != 0)); |
mbed_official | 119:3921aeca8633 | 90 | |
mbed_official | 119:3921aeca8633 | 91 | // clear flag |
mbed_official | 119:3921aeca8633 | 92 | ADCADCSR &= ~(1 << 15); |
mbed_official | 119:3921aeca8633 | 93 | |
mbed_official | 119:3921aeca8633 | 94 | return ((*(ADCDR[obj->adc])) >> 4) & 0x0FFF; // 12 bits range |
mbed_official | 119:3921aeca8633 | 95 | } |
mbed_official | 119:3921aeca8633 | 96 | |
mbed_official | 119:3921aeca8633 | 97 | #if ANALOGIN_MEDIAN_FILTER |
mbed_official | 119:3921aeca8633 | 98 | static inline void order(uint32_t *a, uint32_t *b) { |
mbed_official | 119:3921aeca8633 | 99 | if (*a > *b) { |
mbed_official | 119:3921aeca8633 | 100 | uint32_t t = *a; |
mbed_official | 119:3921aeca8633 | 101 | *a = *b; |
mbed_official | 119:3921aeca8633 | 102 | *b = t; |
mbed_official | 119:3921aeca8633 | 103 | } |
mbed_official | 119:3921aeca8633 | 104 | } |
mbed_official | 119:3921aeca8633 | 105 | #endif |
mbed_official | 119:3921aeca8633 | 106 | |
mbed_official | 119:3921aeca8633 | 107 | static inline uint32_t adc_read_u32(analogin_t *obj) { |
mbed_official | 119:3921aeca8633 | 108 | uint32_t value; |
mbed_official | 119:3921aeca8633 | 109 | #if ANALOGIN_MEDIAN_FILTER |
mbed_official | 119:3921aeca8633 | 110 | uint32_t v1 = adc_read(obj); |
mbed_official | 119:3921aeca8633 | 111 | uint32_t v2 = adc_read(obj); |
mbed_official | 119:3921aeca8633 | 112 | uint32_t v3 = adc_read(obj); |
mbed_official | 119:3921aeca8633 | 113 | order(&v1, &v2); |
mbed_official | 119:3921aeca8633 | 114 | order(&v2, &v3); |
mbed_official | 119:3921aeca8633 | 115 | order(&v1, &v2); |
mbed_official | 119:3921aeca8633 | 116 | value = v2; |
mbed_official | 119:3921aeca8633 | 117 | #else |
mbed_official | 119:3921aeca8633 | 118 | value = adc_read(obj); |
mbed_official | 119:3921aeca8633 | 119 | #endif |
mbed_official | 119:3921aeca8633 | 120 | return value; |
mbed_official | 119:3921aeca8633 | 121 | } |
mbed_official | 119:3921aeca8633 | 122 | |
mbed_official | 119:3921aeca8633 | 123 | uint16_t analogin_read_u16(analogin_t *obj) { |
mbed_official | 119:3921aeca8633 | 124 | uint32_t value = adc_read_u32(obj); |
mbed_official | 119:3921aeca8633 | 125 | |
mbed_official | 119:3921aeca8633 | 126 | return (value << 4) | ((value >> 8) & 0x000F); // 12-bit to 16-bit conversion |
mbed_official | 119:3921aeca8633 | 127 | } |
mbed_official | 119:3921aeca8633 | 128 | |
mbed_official | 119:3921aeca8633 | 129 | float analogin_read(analogin_t *obj) { |
mbed_official | 119:3921aeca8633 | 130 | uint32_t value = adc_read_u32(obj); |
mbed_official | 119:3921aeca8633 | 131 | |
mbed_official | 119:3921aeca8633 | 132 | return (float)value * (1.0f / (float)0x0FFF); // 12 bits range |
mbed_official | 119:3921aeca8633 | 133 | } |