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//***Initializing UART module for PIC16F887***//
#include "uart.h"
#include "conf.h"
void Initialize_UART(void) {
//****Setting I/O pins for UART****//
TRISC6 = 0; // TX Pin set as output
TRISC7 = 1; // RX Pin set as input
//________I/O pins set __________//
/**Initialize SPBRG register for required
baud rate and set BRGH for fast baud_rate**/
SPBRG = ((_XTAL_FREQ / 16) / Baud_rate) - 1;
BRGH = 1; // for high baud_rate
//_________End of baud_rate setting_________//
//****Enable Asynchronous serial port*******//
SYNC = 0; // Asynchronous
SPEN = 1; // Enable serial port pins
//_____Asynchronous serial port enabled_______//
//**Lets prepare for transmission & reception**//
TXEN = 1; // enable transmission
CREN = 1; // enable reception
//__UART module up and ready for transmission and reception__//
//**Select 8-bit mode**//
TX9 = 0; // 8-bit reception selected
RX9 = 0; // 8-bit reception mode selected
//__8-bit mode selected__//
}
//________UART module Initialized__________//
//**Function to send one byte of date to UART**//
void UART_send_char(char bt) {
while (!TXIF); // hold the program till TX buffer is free
TXREG = bt; //Load the transmitter buffer with the received value
}
//_____________End of function________________//
//**Function to get one byte of date from UART**//
char UART_get_char() {
if (OERR) // check for Error
{
CREN = 0; //If error -> Reset
CREN = 1; //If error -> Reset
}
while (!RCIF); // hold the program till RX buffer is free
return RCREG; //receive the value and send it to main function
}
//_____________End of function________________//
//**Function to convert string to byte**//
void UART_send_string(char* st_pt) {
while (*st_pt) //if there is a char
UART_send_char(*st_pt++); //process it as a byte data
}
//___________End of function______________//
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