I have a strange problem in my code. I cannot receive characters via the serial port.
I've read up on the TI and RI interrupts and I think I am handling these correctly.
The program goes to the serial I/O isr, but just sits at the gets(comin,4) line. When I examine comin in the watch window and input chars via the SIN = xx (where xx is an ascii code), I can see the comin array remains empty.
Below is the serial I/O interrupt routine (my application does not need Tx)
pre void uart_rx_isr (void) interrupt 4 using 3 { signed char index=0; EA=0;
if (RI == 1) { gets(comin,4); command = atoi(comin); } RI=FALSE; /* finished isr - clear flag */ TI=FALSE; /* TI will not be used - always clear it*/ EA=1; }
/pre
Here is a fragment from main() - you can see that I set TI=1 initially to set the UART up
pre
TI=TRUE; /* always set TI=1 initially to allow serial printing */ RI=0;
loop: //RI=0; //IDLE
while ((1));
goto loop; } /pre
Appreciate some pointers here.
Jason
HI.
question for ERIC.
what do u think the line from his isr does:
int index=0;
so index is good when it enters the loop.
<quote> such a lack of understanding that you need to go back to basics and do some studying </quote>
he has a lot wrong and i did not give all answers. just the one with the big big problem.
but u just confuse and indicate that something is wrong when it is right. not done well but not wrong.
Always yo're freind.
Zeusti.
at the beginning i said i will stay for a while.
my time is now over and i need to leave.
so i say goodbuy.
Forever yo're freind.
Ho Zeusti, do care to come back! We will be missing you! Please don't go! Who will guide the flock :-)