keyboard.c

来自「usoc在北京博创兴业有限公司的实验平台s3c2410上运行。 2. 各实验的全」· C语言 代码 · 共 148 行

/***************************************************************************\
	Copyright (c) 2004-2007 [e-mail], All rights reserved.
	by threewter	2004.4.26
\***************************************************************************/
	

/***************************************************************************\
    #说明: 键盘驱动
	----------------------------------  Bug  --------------------------------------

	----------------------------------  TODO list  --------------------------------------

	----------------------------------修正--------------------------------------
	2004-5-9	创建

\***************************************************************************/


#include "../inc/reg2410.h"
//#include "../inc/zlg7290.h"
#include "../inc/lib.h"
#include "../inc/macro.h"
#include "../inc/isr.h"
#include "../inc/KeyBoard.h"
#include "../inc/iic.h"
#include "../inc/Uart.h"
#include "inc/lcd.h"
#include <stdio.h>
#include <string.h>


#define KBDTYPE_ZLG7290	1
#define KBDTYPE_MCUIIC		2
#define KEYBOARD_TYPE		KBDTYPE_MCUIIC
#define KEY_DOWN			(1ul<<31)

#include "../inc/i2c-tomega8.h"

#define IRQ_KBD		IRQ_IIC
//#define MCU_IICCON		(IICCON_ACKEN |IICCON_CLK512 | IICCON_INTR | IICCON_CLKPRE(0x3))
#define MCU_IICCON		(IICCON_ACKEN  | IICCON_INTR | IICCON_CLKPRE(7))

//static unsigned short KeyBoard_Map[256];
 unsigned short mcukey,tempmcukey,count,down,up;

static void Key_ISR(int vector, void* data)
{  
   
	static int framecnt=0;

	U8 status ,kdata;
	status = rIICSTAT ;
 //printk("enter key_ISR");
	if( (status & IICSTAT_MODE_MSK) != IICSTAT_MODE_SR)
		return;
	//must slave receive mode

	kdata = rIICDS;

	switch(framecnt){
	case 0:
		if(status & IICSTAT_SLAVEADDR){
			//match the own slave address. begin to slave receive data.
			//DPRINTK("key irq: 111\n");
			framecnt++;
		}
		break;
	case 1:
		if(GetI2C_Devtype(kdata) != DTYPE_MKEYB){
			//DPRINTK("key irq: not key farme\n");
			framecnt=0;
		}
		framecnt++;
		break;
	case 2:
		mcukey = kdata;
		if(mcukey&0x80)
		
		{framecnt=0;
		 down=1;
		break;}
		else if((mcukey&0x80)==0)
		  
		  {tempmcukey=mcukey;
		   up=1;
		   count=1;
		 /* Uart_Printf(0,"\nthe isr tempmcukey is %x",tempmcukey);
		  LCD_printf("\nthe isr tempmcukey is %x ",tempmcukey);
		  Uart_Printf(0,"\nthe isr count is %x",count);*/
		  framecnt=0;
		  break;
		  }
		/*else
		tempmcukey=0;
		Uart_Printf(0,"\nthe up tempmcukey is %x",tempmcukey);
		
		framecnt=0;
		break;*/
		
		
	}

	rIICCON &= ~IICCON_INTPEND;
	
}

void Key_init(void)
{
	I2C_control i2c_ctrl;

	IIC_init();
	Set_IIC_mode(MCU_IICCON, NULL);

	//set owner i2c address to mega8
	i2c_ctrl.cmd=CMD_MST_ADDR;
	i2c_ctrl.ctrl=I2COWNER_ADDRESS;
	IIC_Send(MEGA8_I2CADDRESS, (const char*)&i2c_ctrl, sizeof(i2c_ctrl));

	//enable keyboard
	i2c_ctrl.cmd=CMD_CTRL;
	i2c_ctrl.ctrl = CTRL_MKEn;
	IIC_Send(MEGA8_I2CADDRESS, (const char*)&i2c_ctrl, sizeof(i2c_ctrl));

    INTS_OFF();
	SetISR_Interrupt(IRQ_KBD, Key_ISR, NULL);
    INTS_ON();

}


int GetKey()
{extern  unsigned short tempmcukey,count,down,up;
 int scankey=17;
 unsigned char kKeyBoard_Map[]={0,0,10,0,0,7,4,1,0,0,11
								,14,0,8,5,2,0,13,12,0,0
								,9,6,3,16,0,0,0,0,14,0
								,15,0,1,0,0,17,2,0,0,0
								,4,0,6,0,5,0,0,0,7,0
								,9,15,8,0,0,0,0,0,0,0
								,0,0,0
								}; //64,键值映射表
     if((up==1)&&(count==1)){
       up=0;
       count=0;
       scankey=(int)kKeyBoard_Map[tempmcukey];
  }
  return scankey;
}