[SOLVED] Sending Data from ATmega32 to PC SERIAL Communication CVAVR

[drtvskuthsav]

Hi I need small help in sending data from Atmega32 to PC via Serial Port(atleast printf). I use CodeVision AVR compiler and Proteus to simulate. I can receive data from the PC to Micro but the other way is not happening. I am getting some garbage values in the terminal. Am attaching the circuit and the code is as given

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Code C - [expand]
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/*
Chip type               : ATmega32
Program type            : Application
AVR Core Clock frequency: 7.372800 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 512
*****************************************************/
 
#include <mega32.h>
#include <stdio.h>
#include <delay.h>
void main(void)
{
UCSRA=0x00;
UCSRB=0x08;
UCSRC=0xb6;/*odd parity, 8bit*/
UBRRH=0x00;
UBRRL=0x2f;/*9600*/
 
 
 
while (1)
      {
      printf("kuthsav");
      delay_ms(1000);// Place your code here
 
      }
}

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View attachment usartone_0001.jpg


Thanks to all in advance

 

[majinbuu]

i think its with the parity , i think you should try without the parity check and it might work . I have not yet worked on code vision avr but it you want i can give you the code for avrstudio . and another mistake i think with the program is that you should put a value of 0x33 in ubrrl , try it ...

 

[drtvskuthsav]

i think its with the parity , i think you should try without the parity check and it might work . I have not yet worked on code vision avr but it you want i can give you the code for avrstudio .

Can you please post the code...And also explain me how to check the parity.. I tried UCSRC but it did not help me much. I receive garbage value on my terminal.

and another mistake i think with the program is that you should put a value of 0x33 in ubrrl

I've used 7.372800 MHz as clock frequency...Its mentioned in the specification..

 

[alexan_e]

Have you set the port and debug window to 9600 too?

 

[drtvskuthsav]

Yes..Am simulating it on Proteus..I've given Odd parity,9600 and one stop bit in respective fields of Virtual Terminal shown in circuit. I also used Tera Virtual Terminal and I've given the same Parameters. Though it is showing some garbage values it is different from the one shown in Virtual terminal of Proteus.

 

[drtvskuthsav]

Hey try to help me...

 

[majinbuu]

#include <util/delay.h>

void init_serial(unsigned char rate)
{
	UCSRB = (1<<TXEN)|(1<<RXEN)|(1<<RXCIE); // transmission enable with interrupt
	UCSRC = (1<<UCSZ0)|(1<<UCSZ1)|(1<<URSEL);
	UBRRL = rate;
}	

void uart_print(unsigned char ch)           //what ever you want to send serially to the tx pin.
{
	while(! (UCSRA & (1<<UDRE)));
	UDR = ch;
//	_delay_ms(100);
}

void uart_puts (char *s)
{
    while (*s)	//While *s is not NULL
    {
        uart_print(*s);
        s++;
    }
}



void uart_print_delay(unsigned char ch)//, unsigned char pause)           //what ever you want to send serially to the tx pin.
{
	while(! (UCSRA & (1<<UDRE)));
	UDR = ch;
	_delay_ms(100);
}

void uart_puts_delay(char *s)//,unsigned char pause)
{
    while (*s)	//While *s is not NULL
    {
        uart_print_delay(*s);//, pause);
        s++;
    }
}

void start()
{
 unsigned char str[23] = "\n\r this is how it starts \n";
 unsigned char i = 0;
 for (i = 0 ; i <= 23 ; i++)
 {
 uart_print(str[i]);
 }
}

these are the normal initializations that are required , you just need to calculate the value in hex to be put into init_serial() , i think this should work ...

---------- Post added at 18:09 ---------- Previous post was at 18:09 ----------

sorry for so late reply ...

 

[moottii]

I had the same problem last year...
one choice can be reducing the baudrate.
try 1200

 

[drtvskuthsav]

Thank you guys. Thank you very much. The problem was solved. It was just a problem with setting fuse bits. Anyways now I learnt that part.

 

[Rcario]

Can you please help me with the receiving codes. I want to drive motor via serial communication using ATMEGA 32

 

[drtvskuthsav]

Can you please help me with the receiving codes. I want to drive motor via serial communication using ATMEGA 32

Hi Rcario,
You just want to start and stop motor or want to vary its speed as well.??

 

[Rcario]

hello drtvskuthsav, I just want to start and stop actually.