mbed-os/targets/TARGET_WIZNET/TARGET_W7500x/us_ticker.c

137 lines
3.9 KiB
C

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