#use direttive inside code

[Tensore]

Hi people!

I am wondering which of the following code is the right and the best solution.
I'd like to use the UART port in two different settings depending on a pin state.
Here I show the three solution that I could think of, I don't even know if they are all ok...

1) Using a hardware UART and a software one:

#use rs232(stream=MID, baud=31250, xmit=PIN_C6, rcv=PIN_C7)

#use rs232(stream=COM, baud=9600, xmit=PIN_B1, rcv=PIN_B2)


then using fputc(0x90,MID) or fputc(0x90,COM) as I need the first or second configuration.

2) Using #use direcrive inside the code:

void main() {

int value=0;

int1 a,b,c;

setup_adc_ports(AN0);

setup_adc(ADC_CLOCK_INTERNAL);

set_adc_channel(0);

if ( input(PIN_B4)) {
midi=1;
#use rs232( baud=9600,xmit=PIN_C6, rcv=PIN_C7);
}
if (!input(PIN_B4)) {
midi=0;
#use rs232( baud=31250, xmit=PIN_C6, rcv=PIN_C7);
}
while (TRUE) {


.....
}

so that configuration of UART is done only once the program knows which settings will be used (depending on the state od PIN_B4


3) (i really think that this would not work) Using just une UART and two different settings for it with two different stream names:

#use rs232(stream=MID, baud=31250, xmit=PIN_C6, rcv=PIN_C7)

#use rs232(stream=COM, baud=9600, xmit=PIN_C6, rcv=PIN_C7)

then using fputc(0x90,MID) and fput(0x90,COM) as in 1st case but using just an UART


So that's all, which is the best (and the working one) ?

thank you

mic

[Mark]

From the help file

[Ttelmah]

Either version is 'right'. The 'multiple #use' form, was the _only_ version on older compilers. It can be a real 'pain', since it is very difficult at times to be sure which #use is currently in effect. 'Streams' (the ability to have multiple '#use' statements, accessed by name), were then added, and result in easier to understand/follow code, and a reduction is errors when coding.
I'd use streams, but either will work.

Best Wishes

[Mark]

[Ttelmah]

No.
The stream solution, is right for the first, and second configuration in the original question, while the 'set_uart_speed' solution is correct for the third.

Best Wishes