serial.c

一步 移植ucosii for c51,ucosii for 51多任务实时操作系统

#include "uCOS_II.H"
#include "serial.h"

SerialBuffer pc_send;
/*--------------------------------------------------------------*/
/* ucOS-II的中断服务程序示例                                    */
/*--------------------------------------------------------------*/
void SerialISR(void) interrupt 4
{
#if OS_CRITICAL_METHOD == 3         // Allocate storage for CPU status register 
    OS_CPU_SR  cpu_sr;
#endif 

    OSIntEnter();					// Must be called first at every hardware interrupt entry point 
    OS_ENTER_CRITICAL();
    if(TI)
	{
	  TI=0;
      pc_send.ptr++;
      if (pc_send.ptr < pc_send.count)
        SBUF=pc_send.buffer[pc_send.ptr];
	}
	else if(RI)
	{
	    RI=0;
//处理输入字符
	}
    OS_EXIT_CRITICAL();

   	OSIntExit();			// Must be called finally at every hardware interupt exit point 
}

//串口初始化  0xfd=19200,0xfa=9600,0xf4=4800,0xe8=2400,0xd0=1200
void SerialInit(void)
{   
    TMOD |= 0x20;   //定时器0：模式1(16位定时器)，仅受TR0控制；定时器1：波特率发生器
    TH1   = 0xFD;  //晶振11.0592, 波特率 9600
    ET1   = 0;
    TR1   = 1;	   //start timer1
    SCON  = 0x50;
    ES	  = 1;

    //设置串口收发的初始值
    pc_send.ptr=0;
    pc_send.count=0;
}

void SendStr(unsigned char* buffer,int count)  OS_REENTRANT
{
  if (count > 0)
  {
     pc_send.buffer=buffer;
	 pc_send.count=count;
	 pc_send.ptr=0;
     SBUF=buffer[0];
	 while (pc_send.ptr < pc_send.count);  //wait until all char send
  }
}