atmega.rar_AVR Studio_atmega16 winavr_avr studio atmega_avr stud

#include <avr/io.h> #include <avr/delay.h> #include <avr/interrupt.h> void Uart_Init(void); unsigned char Getchar(void); void Putchar(unsigned char c); unsigned char Read_Key(void); void Disp(void); unsigned char KeyNumber; unsigned char string[8]={10,10,10,10,10,10,10,10}; unsigned char Disp_Buff[11] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00}; int main(void) { TIMSK |= (1 << TOIE0); TCCR0 |= (1 <<CS02); TCNT0 = 50; sei(); DDRA=0xff; DDRB=0xff; KeyNumber=0xff; unsigned char i=0xff,t; Uart_Init(); while(1) { // Disp(); i=Read_Key(); if(i==0)continue; if(i==2) { for(t=0;t<8;t++)string[t]=10; } //清除 if(i==3) { for(t=0;t<8;t++)Putchar(string[t]); } //发送 if(i==1) { for(t=0;t<7;t++)string[t]=string[t+1]; string[7]=KeyNumber; } } } void Uart_Init(void) { UCSRB = 0x00; //disable while setting baud rate UCSRA = 0x00; //Bit1为1则倍速发送 UCSRC = 0x86; UBRRL = 0x33; //波特率：9600 Bps UBRRH = 0x00; //误差率：0.156% UCSRB = 0x18; } unsigned char Getchar(void) { while(!(UCSRA& (1<<RXC))); return UDR; } void Putchar(unsigned char c) { while (!(UCSRA&(1<<UDRE))); UDR=c; } unsigned char Read_Key(void) { unsigned char i,j; DDRC = 0xf0; //设置PD高四位为输出口，低四位为输入口 PORTC = 0x00; // 初始运行输出全为0 if((PINC & 0x0f) == 0x0f) return 0; // 判断有无按键动作，没有，返回0 else { _delay_ms(1); //按键消抖 if((PINC & 0x0f) == 0x0f) return 0; //再次判断是否有按键动作 else { for(i = 4;i < 8;i++) //逐行输出0 { PORTC = ~(1 << i) | 0x0f; //第i行输出0 for(j = 0;j < 4;j++) { if((PINC & (1 << j)) == 0) //逐列检测 KeyNumber = (i - 4) * 3 + j+1; if(KeyNumber==11)KeyNumber=0; //计算键值 } } DDRC = 0xf0; //设置PD高四位为输出口，低四位为输入口 PORTC = 0x00; while((PINC & 0x0f) != 0x0f);//等待按键完成 if(KeyNumber==10)return 2; //按键为“*” if(KeyNumber==12)return 3; //按键为“#” return 1; } } } void Disp(void) { unsigned char i; for(i=0;i<8;i++) { PORTA=~(1<<i); PORTB=Disp_Buff[string[i]]; _delay_ms(1); } PORTA=0xff; } ISR(TIMER0_OVF_vect ) { TCNT0 = 50; Disp(); }