oo:
oo:
/*****************************************************
Chip type : ATmega8
AVR Core Clock frequency: 11.059200 MHz
*****************************************************/
#include <mega8.h>
#include <alcd.h>
#include <stdio.h>
#include <delay.h>
#ifndef RXB8
#define RXB8 1
#define TXB8 0
#define UPE 2
#define DOR 3
#define FE 4
#define UDRE 5
#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 34
char rx_buffer[RX_BUFFER_SIZE];
unsigned char rx_wr_index;
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_wr_index==1 && rx_buffer[0]!=0xF1) rx_wr_index=0; //Check Start Byte
if(rx_wr_index >=3 && data == 0xF2) rx_buffer_overflow =1;
if(rx_wr_index == RX_BUFFER_SIZE) rx_buffer_overflow =1;
}
}
// Declare your global variables here
void main(void)
{
unsigned char temp;
// 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=0x47;
// 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 - PORTC Bit 0
// D5 - PORTC Bit 1
// D6 - PORTC Bit 2
// D7 - PORTC Bit 3
// Characters/line: 16
lcd_init(16);
#asm("sei")
puts("LCD_RUN\r\n");
while (1)
{
if(rx_buffer_overflow)
{
#asm("cli")
lcd_gotoxy((rx_buffer[1]&0xF0)>>4,rx_buffer[1]&0x0F);
for(temp = 2 ;temp < rx_wr_index-1 ;temp++)
{
switch (rx_buffer[temp])
{
case '\f':
lcd_clear();
break;
case '\n':
lcd_gotoxy(0,(rx_buffer[1]&0x0F)+1);
break;
case '\r':
lcd_gotoxy(0,(rx_buffer[1]&0x0F)+1);
break;
default:
lcd_putchar(rx_buffer[temp]);
break;
}
}
rx_wr_index =0;
rx_buffer_overflow =0;
putchar(0xF3); // Done!
#asm("sei")
}
}
}
void Send2LCD (char *STR , unsigned char x ,unsigned char y)
{
putchar(0xF1);
putchar((x<<4)|y);
puts(STR);
putchar(0xF2);
}
Send2LCD("SALAM",0,0); delay_ms(1000); Send2LCD("\f",0,0);// Clear LCD (Format Char) delay_ms(100); Send2LCD("LCD TEST",5,0);
baud con T9600
Serout lcd,baud,[241,0,#dist_inch,242] ' display the distance in inches Line 1 pause 100 Serout lcd,baud,[241,1,#dist_cm,242] ' display the distance in centimeters Line 2
lcd var PORTA.3 ' define variables and constants
دیدگاه