gprs.c

u-us/os2系统

#include"../ucos-ii/includes.h"      
#include "string.h"

#define RdURXH2()	(*(volatile unsigned char *)0x50008024)
#define WrUTXH2(ch)	(*(volatile unsigned char *)0x50008020)=(unsigned char)(ch)
#define RdUTRSTAT2()  (*(volatile unsigned char *)0x50008010)

#define OSULCON2	(*(volatile unsigned char *)0x50008000)   //line control register
#define OSUCON2	    (*(volatile unsigned char *)0x50008004)   //control register
#define OSUFCON2	(*(volatile unsigned char *)0x50008008)  //FIFIO mode
#define OSUMCON2	(*(volatile unsigned char *)0x5000800c)  // 流量 control 
#define OSUBRDIV2	(*(volatile unsigned int  *)0x50008028)  //baud rate

#define GPHCON      (*(volatile unsigned int *)0x56000070)
#define GPHUP       (*(volatile unsigned int *)0x56000078)


//extern void OSInitUart();
//int  InitUart();

//void irq_RevUart2(int vector, int ndev);

void irq_RevUart2(int vector, int ndev)          //serial 2  中断处理函数
{	
	int flag;
    U8 c;
    
	flag = RdUTRSTAT2();
	
	while (flag&0x1)   //receive buffer register 
	{
		c=RdURXH2();// read the char from Uart2;
		
		flag = RdUTRSTAT2();
		//WrUTXH0(c);   
		draw_charline(c,0xf800);		     
	 }
	
}



int  InitUart(void)    //
{
    OSULCON2 = 0x00000003;      // Normal mode operation;No parity;one stop bit;8-bits;
	OSUCON2  = 0x00000085;	    // interrupt request or polling mode;
								// Rx Time Out Enable;Rx Error Status Interrupt disable;Normal transmit;
	OSUFCON2 = 0x00000001;	    // FIFO Enble;transmit trigger level:8-byte;receive trigger level:4-byte;
	
	OSUMCON2 = 0x00000000;	    // 'H'level;
	OSUBRDIV2= 0x00000149;	    // Baud rate division value:26; 	
  
/***************************************************************************/ 
   
 //GPHUP = GPHUP&0xffffff3f;
 GPHUP = 0xffffff3f;   //使能GPH6和GPH7 对应位为0
 GPHCON = 0xaaa;  //设置GPH6和GPH7的功能选择
   	
   	SetISR_Interrupt(IRQ_RXD2, (Interrupt_func_t)irq_RevUart2,(void *) 2);   //开启串口2接收中断
	
	return 0;
}