سلام. نمی تونم با usart بین دو میکرو ارتباط برقرار کنم
مشکل این برنامه چیه.... دیگه مخم هنگ کرد :angry: :angry: :angry:
فرستنده:
گیرنده:
اینم از فایل پروتئوس:
مشکل این برنامه چیه.... دیگه مخم هنگ کرد :angry: :angry: :angry:
فرستنده:
کد:
#define F_CPU 8000000UL
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <stdio.h>
#include "ALCD.h"
#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 Transmitter buffer
#define TX_BUFFER_SIZE 8
char tx_buffer[TX_BUFFER_SIZE];
#if TX_BUFFER_SIZE <= 256
unsigned char tx_wr_index,tx_rd_index,tx_counter;
#else
unsigned int tx_wr_index,tx_rd_index,tx_counter;
#endif
ISR(USART_TXC_vect) /**USART Transmitter interrupt service routine **/
{
if (tx_counter)
{
--tx_counter;
UDR=tx_buffer[tx_rd_index++];
#if TX_BUFFER_SIZE != 256
if (tx_rd_index == TX_BUFFER_SIZE) tx_rd_index=0;
#endif
}
}
void usart_tx_init()
{
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: Off
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud Rate: 9600
UCSRA=0x00;
UCSRB=0x48;
UCSRC=0x06;
UBRRH=0x00;
UBRRL=0x33;
sei();
}
void usart_putchar(char c)
{
while (tx_counter == TX_BUFFER_SIZE);
reti();
if (tx_counter || ((UCSRA & DATA_REGISTER_EMPTY)==0))
{
tx_buffer[tx_wr_index++]=c;
#if TX_BUFFER_SIZE != 256
if (tx_wr_index == TX_BUFFER_SIZE) tx_wr_index=0;
#endif
++tx_counter;
}
else
UDR=c;
sei();
}
int main(void)
{
PORTD=0x00;
DDRD=0x00;
usart_tx_init(); // init transmitter
lcd_init();
lcd_puts("Tx:");
_delay_ms(300);
char count = 1;
while (1)
{
usart_putchar(count);
char str[16];
sprintf(str," %d ",count);
lcd_puts(str);
count++;
_delay_ms(1000);
lcd_gotoxy(0,0);
}
}
کد:
#define F_CPU 8000000UL
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <stdio.h>
#include "ALCD.h"
#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
char rx_buffer_overflow;/** This flag is set on USART Receiver buffer overflow **/
ISR (USART_RXC_vect) /*USART Receiver interrupt service routine*/
{
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)
{
#else
if (rx_wr_index == RX_BUFFER_SIZE) rx_wr_index=0;
if (++rx_counter == RX_BUFFER_SIZE)
{
rx_counter=0;
#endif
rx_buffer_overflow=1;
}
}
}
void usart_rx_init()
{
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: Off
// USART Mode: Asynchronous
// USART Baud Rate: 9600
UCSRA=0x00;
UCSRB=0x90;
UCSRC=0x06;
UBRRH=0x00;
UBRRL=0x33;
sei();
}
char usart_getChar()
{
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
reti();
--rx_counter;
sei();
return data;
}
int main(void)
{
PORTD=0x00;
DDRD=0x00;
usart_rx_init();// init receiver
lcd_init();
lcd_clear();
lcd_puts("Rec:");
while (1)
{
char data;
data = usart_getChar();
char str[16];
sprintf(str," %c ",data);
lcd_puts(str);
lcd_gotoxy(0,0);
}
}
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