Mouse code for the MacroRat
mbed-dev/targets/TARGET_RENESAS/TARGET_VK_RZ_A1H/analogin_api.c
- Committer:
- sahilmgandhi
- Date:
- 2017-05-14
- Revision:
- 18:6a4db94011d3
File content as of revision 18:6a4db94011d3:
/* 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 #ifdef MAX_PERI static const PinMap PinMap_ADC[] = { {P1_8, AN0, 1}, {P1_9, AN1, 1}, {P1_10, AN2, 1}, {P1_11, AN3, 1}, {P1_12, AN4, 1}, {P1_13, AN5, 1}, {P1_14, AN6, 1}, {P1_15, AN7, 1}, {NC, NC, 0} }; #else static const PinMap PinMap_ADC[] = { {P1_8, AN0, 1}, {P1_9, AN1, 1}, {P1_10, AN2, 1}, {P1_11, AN3, 1}, {P1_12, AN4, 1}, {P1_13, AN5, 1}, {P1_15, AN7, 1}, {NC, NC, 0} }; #endif 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 }