mirror of https://github.com/ARMmbed/mbed-os.git
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/* mbed Microcontroller Library
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*******************************************************************************
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* Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of ARM Limited nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************
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*/
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#include <stddef.h>
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#include "us_ticker_api.h"
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#include "PeripheralNames.h"
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#include "system_W7500x.h"
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#include "W7500x_dualtimer.h"
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#include "W7500x_pwm.h"
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#define TIMER_0 DUALTIMER0_0
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#define TIMER_1 PWM_CH1
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#define TIMER_IRQn DUALTIMER0_IRQn
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static PWM_TimerModeInitTypeDef TimerInitType;
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static DUALTIMER_InitTypDef TimerHandler;
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static int us_ticker_inited = 0;
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#ifdef __cplusplus
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extern "C"{
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#endif
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void DUALTIMER0_Handler(void)
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{
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if(DUALTIMER_GetIntStatus(DUALTIMER0_0))
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{
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DUALTIMER_IntClear(DUALTIMER0_0);
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us_ticker_irq_handler();
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}
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}
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#ifdef __cplusplus
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}
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#endif
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void us_ticker_init(void)
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{
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if (us_ticker_inited) return;
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us_ticker_inited = 1;
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SystemCoreClockUpdate();
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TimerInitType.PWM_CHn_PR = (GetSystemClock() / 1000000) -1;
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TimerInitType.PWM_CHn_LR = 0xFFFFFFFF;
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TimerInitType.PWM_CHn_PDMR = 1;
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PWM_TimerModeInit(TIMER_1, &TimerInitType);
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PWM_CHn_Start(TIMER_1);
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}
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uint32_t us_ticker_read()
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{
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if (!us_ticker_inited) us_ticker_init();
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return (TIMER_1->TCR);
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}
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void us_ticker_set_interrupt(timestamp_t timestamp)
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{
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int32_t dev = 0;
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if (!us_ticker_inited)
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{
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us_ticker_init();
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}
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dev = (int32_t)(timestamp - us_ticker_read());
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dev = dev * ((GetSystemClock() / 1000000) / 16);
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if(dev <= 0)
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{
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us_ticker_irq_handler();
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return;
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}
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DUALTIMER_ClockEnable(TIMER_0);
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DUALTIMER_Stop(TIMER_0);
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TimerHandler.TimerControl_Mode = DUALTIMER_TimerControl_Periodic;
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TimerHandler.TimerControl_OneShot = DUALTIMER_TimerControl_OneShot;
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TimerHandler.TimerControl_Pre = DUALTIMER_TimerControl_Pre_16;
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TimerHandler.TimerControl_Size = DUALTIMER_TimerControl_Size_32;
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TimerHandler.TimerLoad = (uint32_t)dev;
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DUALTIMER_Init(TIMER_0, &TimerHandler);
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DUALTIMER_IntConfig(TIMER_0, ENABLE);
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NVIC_EnableIRQ(TIMER_IRQn);
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DUALTIMER_Start(TIMER_0);
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}
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void us_ticker_disable_interrupt(void)
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{
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NVIC_DisableIRQ(TIMER_IRQn);
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DUALTIMER_IntConfig(TIMER_0, DISABLE);
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}
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void us_ticker_clear_interrupt(void)
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{
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DUALTIMER_IntClear(TIMER_0);
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}
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