C Program to connect a pH stamp and PIC 16F877A.

Code C - [expand]
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char input[20];
volatile bit rx_event;
void interrupt()
{
if (PIR1.RCIF) {
UART1_Read_Text(input, "\r", 20);
rx_event=1;
}
}
 
void main()
{
short Start_up=0;
short i;
OSCCON.b6=1;
OSCCON.b5=1;
OSCCON.b4=0;
OSCCON.b1=1;
 
UART1_Init(38400);
ANSELH.ANS11 =0;
IOCB.IOCB7=0;
TRISB.TRISB7=0;
TRISB.TRISB5=1;
 
Soft_UART_Init(&PORTC, 7, 6, 38400, 0);
INTCON.PEIE = 1; //peripheral interrupt enable
PIE1.RCIE = 1; //Receive char Interrupt Enable bit
PIR1.RCIF = 0; //Receive char Interrupt flag- reset to 0
INTCON.GIE = 1; //global interrupt enable
rx_event=0; //initialize rx_evnet to = 0
 
delay_ms(1000); //wait one sec for the stamp to stabilize
if(Start_up==0){ //when the program firsts starts it will
for(I = 1; I<=3;i++){ //flash on / off the stamps led
uart1_write_text("L0"); //"L0" = led's off
uart1_write(13); //<CR>
delay_ms(1000); //wait one sec
uart1_write_text("L1"); //"L1" = led's on
uart1_write(13); //<CR>
delay_ms(1000); //wait one sec
}
Start_up = 1; //by setting Start_up to 1, we stop the leds from flashing on/off
}
 
delay_ms(1000); //wait one sec for the stamp to stabilize after the led flashing
uart1_write_text("c"); //the command "c" will tell the stamp to take continues readings
uart1_write(13); //<CR>
delay_ms(500);
while(1){
short len=0;
if(rx_event){
rx_event=0;
len = strlen(input);
for(i=0;i<len;i++){
Soft_UART_Write(input[i]);
}
Soft_UART_Write(13);
}
}
}