main.c

基于s3c44b0x的ps2接口驱动程序

/****************************************************************************
 * file name	: main.c
 * By 			: hugang, [e-mail]
****************************************************************************/

#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "../inc/option.h"
#include "../inc/44b.h"
#include "../inc/44blib.h"
#include "../inc/def.h"
#include "../ps2/ps2.h"

volatile char which_int=0;
unsigned int SERIAL_BAUD = 57600;

__irq void EInt4567Isr(void)
{
    which_int = rEXTINTPND;
    rEXTINTPND = 0xf;							//clear EXTINTPND reg.		
    rI_ISPC |= BIT_EINT4567;					//clear pending_bit

	ps2_interrupt();
}

/****************************************************************************
【功能说明】中断初始化
****************************************************************************/
void Isr_Init(void)
{
    rINTCON = 0x1;								//中断控制寄存器设置
    rINTMOD=0x0;	  							// All=IRQ mode
 
    pISR_EINT4567= (unsigned) EInt4567Isr;
    rPCONG = (rPCONG&(~(0xf<<12))) | (0xc<<12);
    rPUPG |= 0x3f;
 	rEXTINT = (rEXTINT&(~(0x7<<28))) | (0x2<<28);
 
    rINTMSK=~(BIT_GLOBAL | BIT_EINT4567);		//中断有效
}


/****************************************************************************
【功能说明】系统主函数
****************************************************************************/
void Main(void)
{	
	unsigned int ps2ack;

    rSYSCFG=SYSCFG_8KB;		//使用8K字节的指令缓存
	rNCACHBE0=((unsigned int)(Non_Cache_End>>12)<<16)|(Non_Cache_Start>>12); 
    //在上面的数据区域不使用高速缓存

	Port_Init();		//IO端口功能、方向设定
	Led_Disp();		//LED来回闪烁显示 
	ChangePllValue(56,2,1);		//修改系统主频为8倍频
	Uart_Init(0,SERIAL_BAUD);		//异步串行口初始化，设置波特率为115200
	Delay(0);
	Isr_Init();		//中断初始化

	ps2_command(0xff);
	ps2_waitack(1, &ps2ack);
	if((ps2ack&0xff)==0xfa)
		Uart_Printf("PS2 reset ok\n");
	else
		Uart_Printf("PS2 reset error\n");
	ps2_command(0xf2);
	ps2_waitack(3, &ps2ack);
	if((ps2ack&0xffff)==0xab83)
		Uart_Printf("Find PS2 Keyboard\n");
	else
		Uart_Printf("Unkonwn PS2 device id : %x\n", ps2ack);

	while(1)
	{
		ps2_buffer_check();	
	}
}
//***************************************************************************