rtt-f030/components/net/freemodbus/modbus/port/porttimer.c

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/*
* File : porttimer.c
* This file is part of freemodbus in RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-04-04 yi.qiu first version
*/
/* ----------------------- Platform includes --------------------------------*/
#include <rtthread.h>
#include <s3c24x0.h>
#include "port.h"
/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"
/* ----------------------- static functions ---------------------------------*/
static void prvvTIMERExpiredISR( void );
extern rt_uint32_t PCLK;
/* ----------------------- Start implementation -----------------------------*/
BOOL xMBPortTimersInit(USHORT usTim1Timerout50us)
{
/* all are interrupt mode,set Timer 3 MUX 1/4 */
TCFG1 &= 0xffff0fff;
TCFG1 |= 0x00001000;
TCNTB3 = (rt_int32_t)(usTim1Timerout50us*(PCLK/ (4 *16* 20000))) - 1;
/* manual update */
TCON = TCON & (~(0x0f<<16)) | (0x02<<16);
/* install interrupt handler */
rt_hw_interrupt_install(INTTIMER3, prvvTIMERExpiredISR, RT_NULL);
rt_hw_interrupt_umask(INTTIMER3);
/* start timer4, reload */
TCON = TCON & (~(0x0f<<16)) | (0x09<<16);
return TRUE;
}
void vMBPortTimersEnable(void)
{
/* start timer4, reload */
TCON = TCON & (~(0x0f<<16)) | (0x09<<16);
}
void vMBPortTimersDisable(void)
{
TCON = TCON & (~(0x01<<16));
}
static void prvvTIMERExpiredISR( void )
{
(void)pxMBPortCBTimerExpired();
}