GPIO_DIG.rar_GPIO_DIG_dig

#include <LPC213X.H> #define Hang 16 #define Lie 20 #define SDI_BIT (6) #define SRCLK_BIT (4) #define RCLK_BIT (19) #define G_BIT (18) #define HC595_SDI (1 << SDI_BIT) #define HC595_SRCLK (1 << SRCLK_BIT) #define HC595_RCLK (1 << RCLK_BIT) #define HC595_G (1 << G_BIT) unsigned char const LEDSEG[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x00}; //共阴数码管段码， unsigned char const LEDDEG[]={0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F};//共阴数码管位选 unsigned char Display_Buffer[] = {1,2,3,4,5,6,7,8};//显示缓存 void Send_Two_byte(unsigned int Data); void Delay_us(unsigned long int temp); int keyscan(void); void HardwareInit(void); int main (void) { unsigned char i; unsigned char KyNum = 0; HardwareInit(); while (1) { KyNum = keyscan(); if( (KyNum >= 0) & ( KyNum < 16 )) { Display_Buffer[0]=KyNum/10; Display_Buffer[1]=KyNum%10; } for(i=0;i<2;i++) { Send_Two_byte((LEDDEG[i]<< 8)+LEDSEG[Display_Buffer[i]]); Delay_us(1000); } } } void HardwareInit(void) { IO0DIR |= HC595_SDI; IO0DIR |= HC595_SRCLK; IO0DIR |= HC595_RCLK; IO0DIR |= HC595_G; IO1DIR |= ( 0xf0 << 16 ); //8 9 10 11脚输入 , 12 13 14 15脚输出 } void Send_Two_byte(unsigned int Data) { long i; IO0CLR = (IO0CLR & ~(1 << G_BIT))|(1 << G_BIT); for(i=0;i<16;i++) { if((Data & (1 << 15)) == (1 << 15)) IO0SET = (1 << SDI_BIT); else IO0CLR = (1 << SDI_BIT); Delay_us(1); IO0SET = (1 << SRCLK_BIT); Delay_us(1); IO0CLR = (1 << SRCLK_BIT); Delay_us(1); Data <<= 1; } IO0SET = (1 << RCLK_BIT); Delay_us(1); IO0CLR = (1 << RCLK_BIT); //IO0SET = (1 << G_BIT); //屏蔽此句数码管的亮度最亮 } void Delay_us(unsigned long int temp) { temp = temp*10; while(temp > 0) { temp--; } } int keyscan(void) { unsigned char H_code[4]={0x0e,0x0d,0x0b,0x07}; unsigned long int input=0; unsigned char i; //行 unsigned char j; //列 IO1CLR |= 0x0f<<Lie; // 设置管脚连接GPIO Delay_us(1000); input = ((IO1PIN & ( 0x0f<<Hang ))>>Hang); for( i=0 ; i<4 ;i++ ) { if( H_code[i] == input )break; if(i>=3)return -1; } for( j=0 ; j<4 ; j++ ) { IO1SET |= H_code[j]<<Lie; input = ((IO1PIN & ( 0x0f<<Hang ))>>Hang); if( input == H_code[i] ) { IO1CLR |= 0x0f<<Lie; // 设置管脚连接GPIO while( (IO1PIN & ( 0x0f<<Hang )) != 0x0f0000 ); //等待按键松开 return (4*i+(3-j)); } IO1CLR |= (0xff<<Hang); Delay_us(500); } return -1; }