tmr2.c

来自「This Program uses the 2131 dev board s p」· C语言 代码 · 共 29 行

//-----------------------------------------------------------------------------
//  File:    tmr2.c
//  Contents:  ISR for timer2, used to write characters to the lcd
//            EZUSB FX LCDIO firmware
//  Copyright (c) 2001 Cypress Semiconductor All rights reserved
//-----------------------------------------------------------------------------
#include "ezusb.h"
#include "ezregs.h"
#include "Fx.h"

extern BOOL tmr_kd;

void tmr2_isr( void ) interrupt 5 using 1
{ // fires every Xmsec ( where X=10, in this example )...
  static BYTE loopcnt = 0x00;
  
  if( loopcnt++ > 3 )
  { // 10msec * 3 = 30msec event timer
    TR2 = 0;                    // ...stop timer2 ticking
    loopcnt = 0x00;             // (re)start forground timer event
  }
  else
  {
    
  }
  
  TF2 = 0;          // T2CON.7 must be cleared by software
}