inputs on 16F628

[jet_pack234]

Hi,

I am able to send a string via RS232, but when I try and read portA inputs and send the corresponding value I get garbage. I had a look at the data sheet and the inputs are designated as schmitt trigger inputs. What does this mean exactly. I have been using an 8 way dip switch which puts the supply voltage onto each of the Porta input pins. Perhaps this is wrong???

#include <16f628.h>
#fuses INTRC_IO,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT,NOMCLR
#use delay(clock=4000000) //clock rate in Hz
#use rs232(baud=9600, xmit=PIN_B2,rcv=PIN_B1)
int8 data;

void main() {
setup_uart (TRUE);
SET_TRIS_A( 0b11111111);
puts("Go");

while (TRUE) {

output_high(PIN_B4);
delay_ms(100);
output_low(PIN_B4);
delay_ms(500);
data = input_A();
putc(data);
delay_ms(100);

}

While(TRUE);
}

[PCM programmer]