added prescaler for 16 bit pwm in LPC1347 target
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Diff: targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c
- Revision:
- 144:ef7eb2e8f9f7
- Parent:
- 77:78ca4485fc41
diff -r 423e1876dc07 -r ef7eb2e8f9f7 targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c --- a/targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c Tue Aug 02 14:07:36 2016 +0000 +++ b/targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/analogin_api.c Fri Sep 02 15:07:44 2016 +0100 @@ -1,120 +1,120 @@ -/* 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, AN4, 1}, - {P1_13, AN5, 1}, - {P1_14, AN6, 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 -} +/* 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, AN4, 1}, + {P1_13, AN5, 1}, + {P1_14, AN6, 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 +}