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Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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:
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targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c
- Committer:
- mbed_official
- Date:
- 2015-09-11
- Revision:
- 621:9c82b0f79f3d
- Parent:
- 460:3bcf9be0332c
File content as of revision 621:9c82b0f79f3d:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed_assert.h" #include "analogin_api.h" #include "cmsis.h" #include "pinmap.h" #include "adc_iodefine.h" #include "cpg_iodefine.h" #define ANALOGIN_MEDIAN_FILTER 0 static const PinMap PinMap_ADC[] = { {P1_8, AN0, 1}, {P1_9, AN1, 1}, {P1_10, AN2, 1}, {P1_11, AN3, 1}, {P1_12, AN3, 1}, {P1_13, AN5, 1}, {P1_14, AN5, 1}, {P1_15, AN7, 1}, {NC, NC, 0} }; static volatile uint16_t *ADCDR[] = { &ADCADDRA, &ADCADDRB, &ADCADDRC, &ADCADDRD, &ADCADDRE, &ADCADDRF, &ADCADDRG, &ADCADDRH, }; void analogin_init(analogin_t *obj, PinName pin) { obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC); MBED_ASSERT(obj->adc != (ADCName)NC); CPGSTBCR3 &= ~(1 << 1); CPGSTBCR6 &= ~(1 << 7); // 15: ADF 14: ADIE 13: ADST, [12:9] TRGS..0 // [8:6] CKS 010 :: 340tclk // [5:3] MDS 000 :: single mode // [2:0] CH 000 :: AN0 ADCADCSR = 0x0080; pinmap_pinout(pin, PinMap_ADC); } static inline uint32_t adc_read(analogin_t *obj) { volatile uint16_t data; // Select the appropriate channel and start conversion ADCADCSR &= 0xfff8; ADCADCSR |= (1 << 13 | (obj->adc & 0x7)); // Wait end of conversion do { data = ADCADCSR; } while (((data & (1 << 15)) == 0) || ((data & (1 << 13)) != 0)); // clear flag ADCADCSR &= ~(1 << 15); return ((*(ADCDR[obj->adc])) >> 4) & 0x0FFF; // 12 bits range } #if ANALOGIN_MEDIAN_FILTER static inline void order(uint32_t *a, uint32_t *b) { if (*a > *b) { uint32_t t = *a; *a = *b; *b = t; } } #endif static inline uint32_t adc_read_u32(analogin_t *obj) { uint32_t value; #if ANALOGIN_MEDIAN_FILTER uint32_t v1 = adc_read(obj); uint32_t v2 = adc_read(obj); uint32_t v3 = adc_read(obj); order(&v1, &v2); order(&v2, &v3); order(&v1, &v2); value = v2; #else value = adc_read(obj); #endif return value; } uint16_t analogin_read_u16(analogin_t *obj) { uint32_t value = adc_read_u32(obj); return (value << 4) | ((value >> 8) & 0x000F); // 12-bit to 16-bit conversion } float analogin_read(analogin_t *obj) { uint32_t value = adc_read_u32(obj); return (float)value * (1.0f / (float)0x0FFF); // 12 bits range }