no6.rar_6no.c

#define P_IOA_Data (unsigned int*)0x7000 #define P_IOA_Buffer (unsigned int*)0x7001 #define P_IOA_Dir (unsigned int*)0x7002 #define P_IOA_Attrib (unsigned int*)0x7003 #define P_IOA_Latch (unsigned int*)0x7004 #define P_IOB_Data (unsigned int*)0x7005 #define P_IOB_Buffer (unsigned int*)0x7006 #define P_IOB_Dir (unsigned int*)0x7007 #define P_IOB_Attrib (unsigned int*)0x7008 #define P_Watchdog_Clear (unsigned int*)0x7012 #define P_ADC (unsigned int*)0x7014 #define P_ADC_Ctrl (unsigned int*)0x7015 #define P_ADC_MUX_Ctrl (unsigned int*)0x702B #define P_ADC_MUX_Data (unsigned int*)0x702C unsigned int KeyScan(void); void Delay(void); unsigned int adc(unsigned int channel); int main(void) { unsigned int Key ,kk; *P_IOA_Dir=0x0000; *P_IOA_Attrib=0x00f8; *P_IOA_Data=0x0000; *P_IOB_Dir=0x40ff; *P_IOB_Attrib=0x40ff; *P_IOB_Data=0x4000; kk=4; while(1) { Key = KeyScan(); switch(Key) { case 0x01:kk=4;break; case 0x02:kk=5;break; case 0x04:kk=6;break; default:break; } *P_IOB_Data=adc(kk); *P_Watchdog_Clear = 0x0001; } } unsigned int adc(unsigned int channel) { unsigned int item; unsigned int Key; *P_ADC_Ctrl=0x0001; *P_ADC_MUX_Ctrl=channel; item=*P_ADC_MUX_Data; while(1) { while(!(*P_ADC_MUX_Ctrl & 0x8000)) //判断AD转换是否完成 *P_Watchdog_Clear=0x0001; item=*P_ADC_MUX_Data; item&=0xff00; item>>=8; item|=0x4000; return item; } } unsigned int KeyScan(void) { unsigned int uiData; if((*P_IOA_Data&0x0007) != 0) //非零则表示有键按下 { Delay(); //延时消抖 if((*P_IOA_Data&0x0007) != 0) { uiData = *P_IOA_Data&0x0007; while((*P_IOA_Data&0x0007) != 0)//按下状态 *P_Watchdog_Clear = 1; return uiData; } //两次读数不相等，则置返回值为0 } return 0; //返回键值 } void Delay(void) { unsigned int uiCount; for(uiCount = 0;uiCount <= 3000;uiCount++) { *P_Watchdog_Clear = 0x0001; //清看门狗 } }