[PIC] PIC12LF1822 UART Programming with External Fosc

[Vignesh_jay]

Hello everybody,

I am currently working with PIC12LF1822 a Microchip series Controller. In that I need to configure EUSART in 8-bit Asynchronous mode and pulse generation of 1MHZ using PWM...

First I started with UART send and receive of data..But after setting including oscillator selection in config register, my code is not working and failed to send the character via tx pin(RA0)..

I analysed deeply,but I can't able to find a solution for this. Can anybody suggest to solve this issue.

Below I had pasted my code,

#include<htc.h>
#include <PIC12LF1822.H>
#include "BIPOLAR_SERIAL.C"

#define _XTAL_FREQ 12000000
//Configuration word 1 register for oscillator selection
__CONFIG(CP_OFF & BOREN_OFF & WDTE_OFF & IESO_OFF & FCMEN_OFF & PWRTE_ON & CPD_OFF & FOSC_XT);
//Configuration word 2 register for disabling Low-Voltage program
__CONFIG(LVP_OFF);



void PWM_Duty_Cyle(unsigned int duty_cyc)
{
CCPR1L = duty_cyc>>2;
CCP1CON &= 0xcf;
CCP1CON |= ((duty_cyc & 0x03)<<4);
}

void PWM_Init()
{
TRISA2 = 0; //PWM Pin as output
CCP1CON = 0x0c; //PWM mode: P1A, P1C active-high; P1B, P1D active-high
PR2 = 0x00; //Timer Period Configuration
T2CON = 0x00; //Timer2 Prescale as 1
PWM_Duty_Cyle(0); //Initialize PWM to 0 percent duty cycle
T2CON |= 0x04; //Enable Timer2
}


void main()
{
APFCON = 0;
ANSA0=0;ANSA1=0;ANSA2=0;
serial_init();
serial_tx('S');
// PWM_Init();
// serial_str("PIC12LF1822_TEST");
while(1)
{
serial_tx('A');
serial_tx(' ');
}

}

In the above code I can't able to get character's 'A' as well as 'S'.

Note: I am using 12MHZ as Fosc and I had set the baud rate according to that..(SPBRG=77 for baud =900,brgh=1)