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/*該程序?qū)崿F(xiàn)的功能是在小鍵盤按鍵，在LED上顯示所按的鍵的數(shù)值*/
#include <stdio.h>
#include "hardware.h"
#include "zlg7289.h"
#define SDIO_CTRLIO 0X4 //PF2
#define SDIOOUT() (PDATF&=(~SDIO_CTRLIO));
#define SDIOIN() (PDATF|=SDIO_CTRLIO);
unsigned char keymap[]={ 7,4,1,0,10,0,0,0,8,5,
2,17,11,0,0,0,9,6,3,16,
12,13,0,0,14,0,15,0,0,0,
0,0,0,0,0, 0,0,0,0,0,
0,0,0,0,0, 0,0,0,0,0,
0,0,0,0,0, 0,0,0,0,0,
0,0,0,0
}; //鍵盤映射表
void sendsiodata(unsigned char data)
{
I_ISPC=0x10; //中斷掛起清零寄存器清除未響應(yīng)中斷請求([4] INT_SIO = 1 為清除)
SIODAT=data; //給SIO數(shù)據(jù)寄存器賦值
SIOCON|=(0x1<<3); //SIO控制寄存器澹([3] = 1 為 SIO開始)
while(!(INTPND&0x10)); //中斷掛起寄存器([4] INT_SIO = 1 為請求)
I_ISPC=0x10;
}
unsigned char readsiodata()
{
SDIOIN(); //端口F控制寄存器的PF2設(shè)置成Input
sendsiodata(0);
SDIOOUT(); //端口F控制寄存器的PF2設(shè)置成Output
return SIODAT; //返回SIO數(shù)據(jù)寄存器的值
}
char getkey()
{
char key,mykey;
INTMSK|=(0X1<<26);
while(PDATG&0x10);
ZLG7289_ENABLE();
sendsiodata(ZLG7289_CMD_RDKEY);
mykey=readsiodata(); //mykey的值為該鍵在鍵盤影射表中的位子
ZLG7289_DISABLE();
INTMSK&=(~0X1<<26);
key=keymap[mykey]; //查表得出該鍵的值
printf("mykey is %d\nreturn key is %d\n",mykey,key);
return key;
}
static void Delay(int t) //延時函數(shù)
{
int i;
for(;t>0;t--)
for(i=0;i<400;i++);
}
int led_showdata(unsigned int a)
{
int i=0;
INTMSK|=(0X1<<26);
ZLG7289_ENABLE();
sendsiodata(ZLG7289_CMD_RST); //發(fā)送鍵盤的絕對值到SIODAT
Delay(20);
a%=100000000; //為了避免a的值超出8 位數(shù)，如果超出8 位則將超出部分舍去
//利用ZLG7289 將a 顯示到LED上
for(i=0;i<8 && a !=0 ;i++)
{
sendsiodata(ZLG7289_CMD_DATA1|i);
sendsiodata(a%10);
a/=10;
Delay(10);
}
for(;i<8;i++)
{
sendsiodata(ZLG7289_CMD_DATA0|i);
sendsiodata(0xf);
Delay(10);
}
ZLG7289_DISABLE();
INTMSK&=(~0X1<<26);
return 0;
}
int main()
{
printf("inputEnterExit!\n");
while( (i = getkey()) != 15) //當(dāng)小鍵盤按到回車鍵時退出，其他情況則將鍵盤值顯示到LED上
{
led_showdata(i);
Delay(2000);
}
return 0;
}

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