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Hi
Have following code.
and can't seem to get anything back from my chip.
When pressed on a button, it should write a number.
Use Pickit2 as UART Tool, and when connecting RX to TX, i get Things back.
Only button is held high by 10 k, and is low when pressed.
Have following code.
and can't seem to get anything back from my chip.
When pressed on a button, it should write a number.
Use Pickit2 as UART Tool, and when connecting RX to TX, i get Things back.
Rich (BB code):
#include <htc.h>
#include <stdio.h>
#include <stdlib.h>
#include "lcd.h"
#include <string.h>
__CONFIG (CLKOUTEN_OFF & FCMEN_ON & IESO_OFF & BOREN_OFF & CP_OFF & MCLRE_OFF & PWRTE_ON & WDTE_OFF & FOSC_INTOSC);//XT
__CONFIG (LVP_ON & LPBOR_OFF & BOREN_ON & STVREN_ON & WRT_OFF);
#define _XTAL_FREQ 4000000
#define button RC1
void usrt_init()
{
TRISB5=1; // in
TRISC1=1; // in
TRISB7=0; // out
ANSELB=0; // analog off.
//TXSTA //CHECK THE DATA SHEET FOR TXSTA
CSRC=0; //Clock Source Select bit not used in async.
TX9=0; // 9-bit Transmit Enable bit
TXEN=1; // Transmit Enable bit(1)
SYNC=0; //1 = Synchronous mode 0 = Asynchronous mode
SENDB=0; //Send Break Character bit 1 = Send Sync Break on next transmission (cleared by hardware upon completion)
//0 = Sync Break transmission completed
BRGH=0; //High Baud Rate Select bit 0= low
TRMT=1; //Transmit Shift Register Status bit 1 = TSR empty 0 = TSR full
TX9D=0; //Ninth bit of Transmit Data
//RCSTA //SEE THE DATA SHEET FOR RCSTA
SPEN=1; //Serial Port Enable bit
RX9=0; // 8bit
SREN=0; // Single Receive Enable bit
CREN=1; //1 = Enables receiver
ADDEN=0; //Not Used.
FERR=0; //Framing Error bit
OERR=0; // Overrun Error bit
RX9D=0; // Ninth bit of Received Data
BRGH=0; // low baud rate
SPBRGL=0b11001111; //baud rate 300
SPBRGH=0b00000000;
}//
main()
{
usrt_init();
while(1); //loop
{
if (!button) // if pressed the button.
{
TXEN=1;
TXREG = 0b11111100; //sends a number
while(!TRMT); // until empty.
}
}
}
