本程序是利用T0来控制显示。效果不错的。
Proteus仿真截图：
Atmel Studio6.2编译通过截图：
程序：- /*
- * GccApplication23.c
- *
- * Created: 2014-10-21 21:47:38
- * Author: Administrator
- */
- #define F_CPU 4000000UL
- #include <avr/io.h>
- #include <avr/interrupt.h>
- #include <stdint.h>
- const uint8_t SEG_CODE[] = { 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf};
- const uint8_t Table_OF_Digits[][8] = {
- {0,9,10,1,2,10,2,5},{ 2,1,10,5,7,10,3,9 }
- };
- uint8_t i= 0,j=0;
- uint16_t keep_Time = 0;
- int main(void)
- {
- DDRC = 0xFF;PORTC = 0x00;
- DDRD = 0xFF;PORTD = 0x00;
- TCCR0 = 0x03;
- TCNT0 = 0x03;
- TCNT0 = 256-F_CPU/64.0 * 0.004;
- TIMSK = 0x01;
- sei();
- while(1);
-
- }
- ISR(TIMER0_OVF_vect)
- {
- TCNT0 = 256 - F_CPU/64.0 * 0.004;
- PORTC = 0xFF;
- PORTC = SEG_CODE[Table_OF_Digits[i][j]];
- PORTD = _BV(j);
-
- j = (j+1) % 8;
- if(++keep_Time != 350)return;
- keep_Time = 0;
- i= (i+ 1) % 2;
-
- }
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