65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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* File : porttimer.c
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* This file is part of freemodbus in RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-04-04 yi.qiu first version
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*/
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/* ----------------------- Platform includes --------------------------------*/
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#include <rtthread.h>
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#include <s3c24x0.h>
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#include "port.h"
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/* ----------------------- Modbus includes ----------------------------------*/
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#include "mb.h"
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#include "mbport.h"
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/* ----------------------- static functions ---------------------------------*/
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static void prvvTIMERExpiredISR( void );
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extern rt_uint32_t PCLK;
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/* ----------------------- Start implementation -----------------------------*/
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BOOL xMBPortTimersInit(USHORT usTim1Timerout50us)
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{
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/* all are interrupt mode,set Timer 3 MUX 1/4 */
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TCFG1 &= 0xffff0fff;
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TCFG1 |= 0x00001000;
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TCNTB3 = (rt_int32_t)(usTim1Timerout50us*(PCLK/ (4 *16* 1000))) - 1;
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/* manual update */
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TCON = TCON & (~(0x0f<<16)) | (0x02<<16);
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/* install interrupt handler */
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rt_hw_interrupt_install(INTTIMER3, prvvTIMERExpiredISR, RT_NULL);
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rt_hw_interrupt_umask(INTTIMER3);
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/* start timer3, reload */
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TCON = TCON & (~(0x0f<<16)) | (0x09<<16);
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return TRUE;
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}
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void vMBPortTimersEnable(void)
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{
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/* start timer4, reload */
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TCON = TCON & (~(0x0f<<16)) | (0x09<<16);
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}
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void vMBPortTimersDisable(void)
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{
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TCON = TCON & (~(0x01<<16));
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}
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static void prvvTIMERExpiredISR( void )
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{
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(void)pxMBPortCBTimerExpired();
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}
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