Problem with #use fast_io(C) & #use rs232

[Gio]

Hello!
Please i need help.....

When in my main application I use:
#use rs232(baud=9600,parity=E,xmit=PIN_C6,rcv=PIN_C7,bits=8)

and I use also : #use fast_io(C)
in my .c files, my function SHIFT_OUT do not run.

If I do not use fast_io or rs232, My function run ok....why ????


main.c example:

#include <18F452.h>
#fuses NOWDT,HS, PUT, NOPROTECT, NOLVP
#use delay(clock=10000000)
#use rs232(baud=9600,parity=E,xmit=PIN_C6,rcv=PIN_C7,bits=8)

#include <AD.c>

void main()
{
SHIFT_OUT(DDS_AD9951_CFR1);
SHIFT_OUT(0x00); // OSK Disable, Auto OSK keying OFF
SHIFT_OUT(0x00);
SHIFT_OUT(0x00); // SDIO input only
SHIFT_OUT(0x00); // Power down
delay_us(1);
output_high(IO_UPDATE);
//delay_us(5);
output_low(IO_UPDATE);
}




AD.c example:
#define IO_UPDATE PIN_C0 // pin 15
#define SCLK PIN_C3 // pin 18
#define SDIO PIN_C5 // pin 24
#define DDS_AD9951_CFR1 0x00

#use fast_io(C)
SET_TRIS_C(0B10010000); //set port 1 = INPUT 0 = OUTPUT

//-------------------------
void shift_out(INT8 BYTEn)
//-------------------------
{
// SHIFT MSB FIRST !!!!!
char tmp;

for (tmp = 0; tmp < 8; tmp++)
{

if ((byten & 0b10000000) == 0b10000000)
output_high(SDIO);
else
output_low(SDIO);

BYTEn = BYTEn << 1;

output_high(SCLK);
delay_us(5);
output_low(SCLK);
}

[ttelmah]

The tris function, needs to be in the code. the use fast_io statement, is a declaration (like the use RS232 statement), and doesn't need to be 'called'. However the tris function, is just that, a _function_, and needs to be called somewhere inside the code, before it'll work. As it stands, the tris funtion is never being called, so the port will default to it's 'power on' state, which is with all pins as inputs. Hence the output shift routine, will never work.
Move your 'set_tris_c' function, to the main, so it is called before you try to do the I/O.

Best Wishes

[Guest]

Many Tnks to ttelmah for answer.

Now I have see in the examples that usually
#set_tris(x)
is in the main() or in init_device() function.

Bye, Gio