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/*****************************************************
Chip type : ATmega8
Program type : Application
AVR Core Clock frequency: 8,000000 MHz
Memory model : Small
External RAM size : 0
Data Stack size : 256
*****************************************************/
#include <mega8.h>
// Alphanumeric LCD functions
#include <lcd.h>
#ifndef RXB8
#define RXB8 1
#endif
#ifndef TXB8
#define TXB8 0
#endif
#ifndef UPE
#define UPE 2
#endif
#ifndef DOR
#define DOR 3
#endif
#ifndef FE
#define FE 4
#endif
#ifndef UDRE
#define UDRE 5
#endif
#ifndef RXC
#define RXC 7
#endif
#define FRAMING_ERROR (1<<FE)
#define PARITY_ERROR (1<<UPE)
#define DATA_OVERRUN (1<<DOR)
#define DATA_REGISTER_EMPTY (1<<UDRE)
#define RX_COMPLETE (1<<RXC)
// USART Receiver buffer
#define RX_BUFFER_SIZE 8
char rx_buffer[RX_BUFFER_SIZE];
#if RX_BUFFER_SIZE <= 256
unsigned char rx_wr_index,rx_rd_index,rx_counter;
#else
unsigned int rx_wr_index,rx_rd_index,rx_counter;
#endif
// This flag is set on USART Receiver buffer overflow
bit rx_buffer_overflow;
// USART Receiver interrupt service routine
interrupt [USART_RXC] void usart_rx_isr(void)
{
char status,data;
status=UCSRA;
data=UDR;
if ((status & (FRAMING_ERROR | PARITY_ERROR | DATA_OVERRUN))==0)
{
rx_buffer[rx_wr_index++]=data;
#if RX_BUFFER_SIZE == 256
// special case for receiver buffer size=256
if (++rx_counter == 0) rx_buffer_overflow=1;
#else
if (rx_wr_index == RX_BUFFER_SIZE) rx_wr_index=0;
if (++rx_counter == RX_BUFFER_SIZE)
{
rx_counter=0;
rx_buffer_overflow=1;
}
#endif
}
}
#ifndef _DEBUG_TERMINAL_IO_
// Get a character from the USART Receiver buffer
#define _ALTERNATE_GETCHAR_
#pragma used+
char getchar(void)
{
char data;
while (rx_counter==0);
data=rx_buffer[rx_rd_index++];
#if RX_BUFFER_SIZE != 256
if (rx_rd_index == RX_BUFFER_SIZE) rx_rd_index=0;
#endif
#asm("cli")
--rx_counter;
#asm("sei")
return data;
}
#pragma used-
#endif
// Standard Input/Output functions
#include <stdio.h>
#include <stdlib.h>
#include <delay.h>
//дисплей
#asm
.equ __lcd_port=0x18
#endasm
// Declare your global variables here
unsigned int tm=10;
unsigned int t5,t4,t2;
int tmc;
unsigned char bufer[2];
void display() //Функция отображение надписи "ONLINE" на LCD
{
lcd_clear(); //Очистка дисплея
lcd_putsf("ONLINE"); //Вывод надписи "ONLINE" на дисплей
//lcd_gotoxy(0,1); //Переход курсора на второй ряд и первый разряд досплея
}
//Таймер0 таймаута бездействия
interrupt [TIM0_OVF] void timer0_ovf_isr(void)
{
// Reinitialize Timer 0 value
TCNT0=0xFF;
// Place your code here
//while(1){
//delay_ms(1000);
//printf(" ");
//}
--t2;
}
// Timer2 overflow interrupt service routine
interrupt [TIM2_OVF] void timer2_ovf_isr(void)
{
// Reinitialize Timer2 value
TCNT2=0xFF;
// Place your code here
t4++;
if((t4==30) && (t5==0)){
//printf("tmc=%d", tmc);
lcd_gotoxy(0,1); //перенос курсора
lcd_putsf(" "); //вывод на дисплей ""
lcd_gotoxy(0,1); //перенос курсора
lcd_putsf("REQ"); //вывод на дисплей ""
sprintf(bufer,"%d",tmc);
lcd_gotoxy(4,1);
lcd_putsf(" ");
lcd_gotoxy(4,1);
lcd_puts(bufer);
tmc--;
if(tmc<0){
lcd_gotoxy(0,1); //перенос курсора
lcd_putsf(" ");
lcd_gotoxy(0,1); //перенос курсора
lcd_putsf("PING"); //вывод на дисплей ""
//delay_ms(1000);
//lcd_gotoxy(0,1); //перенос курсора
//lcd_putsf(" "); //вывод на дисплей ""
//printf("1SREG=%x", SREG);
printf("1UCSRA=%x", UCSRA);
printf("PING");
printf("2UCSRA=%x", UCSRA);
delay_ms(1000);
UCSRA=0x60;
printf("3UCSRA=%x", UCSRA);
t5=0;
tmc=tm;
}
t4=0;
}
}
// External Interrupt 0 service routine
interrupt [EXT_INT0] void ext_int0_isr(void)
{
// Place your code here
}
void main(void)
{
// Declare your local variables here
// Input/Output Ports initialization
// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;
// Port C initialization
// Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;
// Port D initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=In
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=T
PORTD=0x00;
DDRD=0xFE;
// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: 7,813 kHz
TCCR0=0x05;
TCNT0=0xFF;
// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x05;
TCNT1H=0x00;
TCNT1L=0xFF;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;
// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: 7,813 kHz
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x07;
TCNT2=0xFF;
OCR2=0x00;
// External Interrupt(s) initialization
// INT0: On
// INT0 Mode: Rising Edge
// INT1: Off
GICR|=0x40;
MCUCR=0x03;
GIFR=0x40;
// Timer(s)/Counter(s) Interrupt(s) initialization
//TIMSK=0x00;
//TIMSK=0x01;
TIMSK=0x41;
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud Rate: 9600
UCSRA=0x00;
UCSRB=0x98;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x33;
// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
// ADC initialization
// ADC disabled
ADCSRA=0x00;
// SPI initialization
// SPI disabled
SPCR=0x00;
// TWI initialization
// TWI disabled
TWCR=0x00;
// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTB Bit 0
// RD - PORTB Bit 1
// EN - PORTB Bit 2
// D4 - PORTB Bit 4
// D5 - PORTB Bit 5
// D6 - PORTB Bit 6
// D7 - PORTB Bit 7
// Characters/line: 8
lcd_init(16); //инициализация дисплея
tmc=tm;
printf("start"); //вывод в УАРТ "terminal= "
display(); //отображение надписи "онлайн"
#asm("sei")
while (1) //бесконечный цикл (цыклическое выполнение бипа онлайн)
{
// if(t==0)
// {
// printf("t=0");
delay_ms(1000);
// }
if (rx_counter!=0){
printf("rc=%c", getchar());
}
printf("UCSRA=%x", UCSRA);
}
} 

