Multi usart using pic16f877a

[M.Imran Ali]

Hi
I need to make a card that uses at least five usat channal. All shold be of interrupt based? How can it be possible? It is urgent pls reply any one

 

[Tahmid]

You can use the hardware module of the PIC16F877A. For the other four, use software USART. Your compiler may have library functions/routines for software UART/USART. Check in the compiler manual.

Hope this helps.
Tahmid.

 

[manikandanshine]

may i know which compiler u r used?

 

[M.Imran Ali]

I am using ccs compiler.But i want to use reciever interrupt for each usart.Is it possible .If yes than how?

 

[manikandanshine]

do you know kbhit() function........first u study that function......do u want sample code....i will send you........

 

[M.Imran Ali]

Pls send if possible? I'll be very thankfull to you.

 

[manikandanshine]

 #include<16f877a.h>
 #use delay(clock=10000000)
 #use rs232(baud=9600, xmit=PIN_C6,rcv=PIN_C7,stream=uart1)
 #use rs232(baud=9600, xmit=PIN_D0,rcv=PIN_D1,stream=uart2)
unsigned char c;
unsigned char d;
 void main(void)
 {
while(true)
{
if(kbhit(uart1))
{
c=fgetc(uart1);
fputc(c,uart1);
}
if(kbhit(uart2))
{
d=fgetc(uart2);
fputc(d,uart2);
}
} 
 }

TRY THIS CODE.....IT WORKS PERFECTLY.....HERE I USE TWO UART.WHEN WE PUT CHARACTER IN ANY WINDOW,IT GETS THIS CHARCTER AND THEN DISPLAYED IN THAT WINDOW......CHECK AND THEN REPLY.........

 

[M.Imran Ali]

Thanks dear manikandanshine . It works now

 

[manikandanshine]

ok... do u have any help ask me...if i know,i will surely reply you...