keyboard.c

博创2410的实验代码

#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,up,count;

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)//如果不为IIC从接收模式返回
		return;
	//must slave receive mode

	kdata = rIICDS;  //获得键盘号

	switch(framecnt){
	case 0:                                                //第一次按下
		if(status & IICSTAT_SLAVEADDR){  //判断和IIC从地址是否匹配
			//match the own slave address. begin to slave receive data.
			//DPRINTK("key irq: 111\n");  
			framecnt++;        //如果匹配，连击计数加1
		}
		break;
	case 1:
		if(GetI2C_Devtype(kdata) != DTYPE_MKEYB){//如果不是键盘扫描，则连击计数清0
			//DPRINTK("key irq: not key farme\n");
			framecnt=0;
		}
		framecnt++;   //如果是键盘扫描，连击计数加1
		break;
	case 2:
		mcukey = kdata;
		if(mcukey&0x80) //键盘按下
		
		{framecnt=0;
		break;}
		else if(!(mcukey&0x80)){  //键盘抬起
		up=1;        //键盘抬起计数
		count=1;   //键盘按下计数
		tempmcukey=mcukey;  //获得键盘号
		//Uart_Printf(0,"\nmcukey is %x",mcukey);
		//LCD_printf("the key is %x ",mcukey);
		}
		framecnt=0;   //连击计数清0
		break; 
		
		
	}

	rIICCON &= ~IICCON_INTPEND;//禁止TX/RX中断
	
}

void Key_init(void)
{
	I2C_control i2c_ctrl;

	IIC_init();  //IIC初始化
	Set_IIC_mode(MCU_IICCON, NULL);//设置IIC控制寄存器，参看手册

	//set owner i2c address to mega8
	i2c_ctrl.cmd=CMD_MST_ADDR;      //主机地址设置命令
	i2c_ctrl.ctrl=I2COWNER_ADDRESS;  //ATmega8 本机地址
	IIC_Send(MEGA8_I2CADDRESS, (const char*)&i2c_ctrl, sizeof(i2c_ctrl));//设置ATMEGA8主机地址

	//enable keyboard
	i2c_ctrl.cmd=CMD_CTRL;  //控制命令
	i2c_ctrl.ctrl = CTRL_MKEn;   //键盘打开命令
	IIC_Send(MEGA8_I2CADDRESS, (const char*)&i2c_ctrl, sizeof(i2c_ctrl));//扫描键盘开启

    INTS_OFF();//中断关闭
	SetISR_Interrupt(IRQ_KBD, Key_ISR, NULL);  //安装IIC中断服务程序为KEY_ISR()
    INTS_ON();//中断打开

}

void Key_init_restor(void)
{
	IIC_init();    //IIC初始化
	Set_IIC_mode(MCU_IICCON, NULL);//设置IIC控制寄存器

}

unsigned char GetKey()
{
 unsigned char scankey;
	unsigned char KeyBoard_Map[]={0,0,0x9e,0,0,0xe0,0x66,0x60,0,0,0x8e
								,14,0,0xfe,0xb6,0xda,0xfc,0x1c,0x6e,0,0
								,0xf6,0xbe,0xf2,0x3e,0,0,0,0,0xce,0
								,0x7c,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							
  while(1){								
     if((up==1)&&(count==1)){   //判断是否键盘按下一次
       up=0;
       count=0;
       scankey=KeyBoard_Map[tempmcukey];  //获得键盘映射值
       break;
     }
     else continue;
     }
  return scankey;//返回键盘映射值
}