demo_6_4__.c

AVR单片机嵌入式系统原理与应用实践例码

/*********************************************
File name           : demo_6_4.c
Chip type           : ATmega16
Program type        : Application
Clock frequency     : 4.000000 MHz
Memory model        : Small
External SRAM size  : 0
Data Stack size     : 256
*********************************************/

#include <mega16.h>
	#ifndef __SLEEP_DEFINED__
	#define __SLEEP_DEFINED__
	.EQU __se_bit=0x40
	.EQU __sm_mask=0xB0
	.EQU __sm_powerdown=0x20
	.EQU __sm_powersave=0x30
	.EQU __sm_standby=0xA0
	.EQU __sm_ext_standby=0xB0
	.EQU __sm_adc_noise_red=0x10
	.SET power_ctrl_reg=mcucr
	#endif
#include <delay.h>

flash unsigned char led_7[16]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,
                      0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};
bit point_on = 0;
void main(void)
{
	unsigned char i;

	PORTA=0xFF;
	DDRA=0xFF;

	while (1)
    {
		for (i=0;i<=15;i++)
		{
			PORTA = led_7[i];
			if (point_on) PORTA |= 0x80;
			delay_ms(1000);
		}
		point_on = ~point_on;
    }
}