added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c@77:78ca4485fc41, 2016-02-29 (annotated)
- Committer:
- mbed_official
- Date:
- Mon Feb 29 11:45:10 2016 +0000
- Revision:
- 77:78ca4485fc41
- Parent:
- 0:9b334a45a8ff
- Child:
- 144:ef7eb2e8f9f7
Synchronized with git revision 01648b2a3b7e3eeb28eb927a5c65edaa3a9d49fc
Full URL: https://github.com/mbedmicro/mbed/commit/01648b2a3b7e3eeb28eb927a5c65edaa3a9d49fc/
[Renesas RZ/A1H] Fix analogin peripheral names
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* mbed Microcontroller Library |
bogdanm | 0:9b334a45a8ff | 2 | * Copyright (c) 2006-2013 ARM Limited |
bogdanm | 0:9b334a45a8ff | 3 | * |
bogdanm | 0:9b334a45a8ff | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
bogdanm | 0:9b334a45a8ff | 5 | * you may not use this file except in compliance with the License. |
bogdanm | 0:9b334a45a8ff | 6 | * You may obtain a copy of the License at |
bogdanm | 0:9b334a45a8ff | 7 | * |
bogdanm | 0:9b334a45a8ff | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
bogdanm | 0:9b334a45a8ff | 9 | * |
bogdanm | 0:9b334a45a8ff | 10 | * Unless required by applicable law or agreed to in writing, software |
bogdanm | 0:9b334a45a8ff | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
bogdanm | 0:9b334a45a8ff | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
bogdanm | 0:9b334a45a8ff | 13 | * See the License for the specific language governing permissions and |
bogdanm | 0:9b334a45a8ff | 14 | * limitations under the License. |
bogdanm | 0:9b334a45a8ff | 15 | */ |
bogdanm | 0:9b334a45a8ff | 16 | #include "mbed_assert.h" |
bogdanm | 0:9b334a45a8ff | 17 | #include "analogin_api.h" |
bogdanm | 0:9b334a45a8ff | 18 | |
bogdanm | 0:9b334a45a8ff | 19 | #include "cmsis.h" |
bogdanm | 0:9b334a45a8ff | 20 | #include "pinmap.h" |
bogdanm | 0:9b334a45a8ff | 21 | |
bogdanm | 0:9b334a45a8ff | 22 | #include "adc_iodefine.h" |
bogdanm | 0:9b334a45a8ff | 23 | #include "cpg_iodefine.h" |
bogdanm | 0:9b334a45a8ff | 24 | |
bogdanm | 0:9b334a45a8ff | 25 | #define ANALOGIN_MEDIAN_FILTER 0 |
bogdanm | 0:9b334a45a8ff | 26 | |
bogdanm | 0:9b334a45a8ff | 27 | static const PinMap PinMap_ADC[] = { |
bogdanm | 0:9b334a45a8ff | 28 | {P1_8, AN0, 1}, |
bogdanm | 0:9b334a45a8ff | 29 | {P1_9, AN1, 1}, |
bogdanm | 0:9b334a45a8ff | 30 | {P1_10, AN2, 1}, |
bogdanm | 0:9b334a45a8ff | 31 | {P1_11, AN3, 1}, |
mbed_official | 77:78ca4485fc41 | 32 | {P1_12, AN4, 1}, |
bogdanm | 0:9b334a45a8ff | 33 | {P1_13, AN5, 1}, |
mbed_official | 77:78ca4485fc41 | 34 | {P1_14, AN6, 1}, |
bogdanm | 0:9b334a45a8ff | 35 | {P1_15, AN7, 1}, |
bogdanm | 0:9b334a45a8ff | 36 | {NC, NC, 0} |
bogdanm | 0:9b334a45a8ff | 37 | }; |
bogdanm | 0:9b334a45a8ff | 38 | |
bogdanm | 0:9b334a45a8ff | 39 | static volatile uint16_t *ADCDR[] = { |
bogdanm | 0:9b334a45a8ff | 40 | &ADCADDRA, |
bogdanm | 0:9b334a45a8ff | 41 | &ADCADDRB, |
bogdanm | 0:9b334a45a8ff | 42 | &ADCADDRC, |
bogdanm | 0:9b334a45a8ff | 43 | &ADCADDRD, |
bogdanm | 0:9b334a45a8ff | 44 | &ADCADDRE, |
bogdanm | 0:9b334a45a8ff | 45 | &ADCADDRF, |
bogdanm | 0:9b334a45a8ff | 46 | &ADCADDRG, |
bogdanm | 0:9b334a45a8ff | 47 | &ADCADDRH, |
bogdanm | 0:9b334a45a8ff | 48 | }; |
bogdanm | 0:9b334a45a8ff | 49 | |
bogdanm | 0:9b334a45a8ff | 50 | void analogin_init(analogin_t *obj, PinName pin) { |
bogdanm | 0:9b334a45a8ff | 51 | obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); |
bogdanm | 0:9b334a45a8ff | 52 | MBED_ASSERT(obj->adc != (ADCName)NC); |
bogdanm | 0:9b334a45a8ff | 53 | |
bogdanm | 0:9b334a45a8ff | 54 | CPGSTBCR3 &= ~(1 << 1); |
bogdanm | 0:9b334a45a8ff | 55 | CPGSTBCR6 &= ~(1 << 7); |
bogdanm | 0:9b334a45a8ff | 56 | |
bogdanm | 0:9b334a45a8ff | 57 | // 15: ADF 14: ADIE 13: ADST, [12:9] TRGS..0 |
bogdanm | 0:9b334a45a8ff | 58 | // [8:6] CKS 010 :: 340tclk |
bogdanm | 0:9b334a45a8ff | 59 | // [5:3] MDS 000 :: single mode |
bogdanm | 0:9b334a45a8ff | 60 | // [2:0] CH 000 :: AN0 |
bogdanm | 0:9b334a45a8ff | 61 | ADCADCSR = 0x0080; |
bogdanm | 0:9b334a45a8ff | 62 | |
bogdanm | 0:9b334a45a8ff | 63 | pinmap_pinout(pin, PinMap_ADC); |
bogdanm | 0:9b334a45a8ff | 64 | } |
bogdanm | 0:9b334a45a8ff | 65 | |
bogdanm | 0:9b334a45a8ff | 66 | static inline uint32_t adc_read(analogin_t *obj) { |
bogdanm | 0:9b334a45a8ff | 67 | volatile uint16_t data; |
bogdanm | 0:9b334a45a8ff | 68 | |
bogdanm | 0:9b334a45a8ff | 69 | // Select the appropriate channel and start conversion |
bogdanm | 0:9b334a45a8ff | 70 | ADCADCSR &= 0xfff8; |
bogdanm | 0:9b334a45a8ff | 71 | ADCADCSR |= (1 << 13 | (obj->adc & 0x7)); |
bogdanm | 0:9b334a45a8ff | 72 | |
bogdanm | 0:9b334a45a8ff | 73 | // Wait end of conversion |
bogdanm | 0:9b334a45a8ff | 74 | do { |
bogdanm | 0:9b334a45a8ff | 75 | data = ADCADCSR; |
bogdanm | 0:9b334a45a8ff | 76 | } while (((data & (1 << 15)) == 0) || ((data & (1 << 13)) != 0)); |
bogdanm | 0:9b334a45a8ff | 77 | |
bogdanm | 0:9b334a45a8ff | 78 | // clear flag |
bogdanm | 0:9b334a45a8ff | 79 | ADCADCSR &= ~(1 << 15); |
bogdanm | 0:9b334a45a8ff | 80 | |
bogdanm | 0:9b334a45a8ff | 81 | return ((*(ADCDR[obj->adc])) >> 4) & 0x0FFF; // 12 bits range |
bogdanm | 0:9b334a45a8ff | 82 | } |
bogdanm | 0:9b334a45a8ff | 83 | |
bogdanm | 0:9b334a45a8ff | 84 | #if ANALOGIN_MEDIAN_FILTER |
bogdanm | 0:9b334a45a8ff | 85 | static inline void order(uint32_t *a, uint32_t *b) { |
bogdanm | 0:9b334a45a8ff | 86 | if (*a > *b) { |
bogdanm | 0:9b334a45a8ff | 87 | uint32_t t = *a; |
bogdanm | 0:9b334a45a8ff | 88 | *a = *b; |
bogdanm | 0:9b334a45a8ff | 89 | *b = t; |
bogdanm | 0:9b334a45a8ff | 90 | } |
bogdanm | 0:9b334a45a8ff | 91 | } |
bogdanm | 0:9b334a45a8ff | 92 | #endif |
bogdanm | 0:9b334a45a8ff | 93 | |
bogdanm | 0:9b334a45a8ff | 94 | static inline uint32_t adc_read_u32(analogin_t *obj) { |
bogdanm | 0:9b334a45a8ff | 95 | uint32_t value; |
bogdanm | 0:9b334a45a8ff | 96 | #if ANALOGIN_MEDIAN_FILTER |
bogdanm | 0:9b334a45a8ff | 97 | uint32_t v1 = adc_read(obj); |
bogdanm | 0:9b334a45a8ff | 98 | uint32_t v2 = adc_read(obj); |
bogdanm | 0:9b334a45a8ff | 99 | uint32_t v3 = adc_read(obj); |
bogdanm | 0:9b334a45a8ff | 100 | order(&v1, &v2); |
bogdanm | 0:9b334a45a8ff | 101 | order(&v2, &v3); |
bogdanm | 0:9b334a45a8ff | 102 | order(&v1, &v2); |
bogdanm | 0:9b334a45a8ff | 103 | value = v2; |
bogdanm | 0:9b334a45a8ff | 104 | #else |
bogdanm | 0:9b334a45a8ff | 105 | value = adc_read(obj); |
bogdanm | 0:9b334a45a8ff | 106 | #endif |
bogdanm | 0:9b334a45a8ff | 107 | return value; |
bogdanm | 0:9b334a45a8ff | 108 | } |
bogdanm | 0:9b334a45a8ff | 109 | |
bogdanm | 0:9b334a45a8ff | 110 | uint16_t analogin_read_u16(analogin_t *obj) { |
bogdanm | 0:9b334a45a8ff | 111 | uint32_t value = adc_read_u32(obj); |
bogdanm | 0:9b334a45a8ff | 112 | |
bogdanm | 0:9b334a45a8ff | 113 | return (value << 4) | ((value >> 8) & 0x000F); // 12-bit to 16-bit conversion |
bogdanm | 0:9b334a45a8ff | 114 | } |
bogdanm | 0:9b334a45a8ff | 115 | |
bogdanm | 0:9b334a45a8ff | 116 | float analogin_read(analogin_t *obj) { |
bogdanm | 0:9b334a45a8ff | 117 | uint32_t value = adc_read_u32(obj); |
bogdanm | 0:9b334a45a8ff | 118 | |
bogdanm | 0:9b334a45a8ff | 119 | return (float)value * (1.0f / (float)0x0FFF); // 12 bits range |
bogdanm | 0:9b334a45a8ff | 120 | } |