Two Baud Rates

[Trentino]

I am tring to use two baud rates but it is not working.

here is my code


stuff...

#use rs232(baud=4800, xmit=PIN_C6, rcv=PIN_C7)

stiff...

void Set_4800_Baud(); //sets GPS baud rate to 4800

stuff...

main() {

stuff...

#use rs232(baud=4800, xmit=PIN_C6, rcv=PIN_C7)
usb_wait_for_enumeration();
printf("\r\n\r\n***Enumerated2***\r\n");

stuff...

} // end of main()

#use rs232(baud=49600, xmit=PIN_C6, rcv=PIN_C7)
Set_4800_Baud()
{
signed int8 i;

for (i=0; i<BAUDSTRING_SIZE; i++)
{
putc(BaudString[i]);
delay_ms(2);
}
return;
}


but it does not work. The "stuff..." contains no RS232 code. The line
printf("\r\n\r\n***Enumerated2***\r\n");
should come out as 4800 but it comes out as 9600

[Steve H]

For problems like this I usually llok at the list file and follow the program execution. Usually I will find that the program flow isn't exactly like I thought it would be and one of the Use RS232's is not in the same logical sequence as I thought it would be.

Learning to look at the list file is a useful tool to debugging program problems.

HTH - Steve H.

[Laurent Chouinard]

try this, at the beginning of your program:

#use rs232(baud=4800, xmit=PIN_C6, rcv=PIN_C7)

then when you want to switch over to 9600, do this:

set_uart_speed(9600);

and when you want to go back to 4800:

set_uart_speed(4800)

This works only with the hardware serial power, which you are using right now (pins C6 and C7)