/*  Name     : main.c
 *  Purpose  : Source code for UART Interfacing with ARM LPC2148.
 *  Author   : Gemicates
 *  Date     : 2018-02-02
 *  Website  : www.gemicates.org
 *  Revision : None
 */
#include <lpc214x.h>      			  		 // header file for LPC21XX series

void ser_init(void);
void tx(unsigned char c);
unsigned char rx(void);
void tx_string(unsigned char *s);


void main()	                                                 // main function
{
 ser_init();
 tx('S');
 }
 void ser_init()                                                 // Funtion to Initialize UART
{
 VPBDIV=0x02;                                                    // PCLK = 30MHz
 PINSEL0|=0x05;
 U0LCR=0x83;
 U0DLL=195;
 U0DLM=0;
 U0LCR=0x03;
 U0TER=(1<<7);
}
 
void tx(unsigned char c)                                         // Funtion to transmit the data
{
 U0THR=c;
 while((U0LSR&(1<<5))==0);
}
 
void tx_string(unsigned char *s)
{
 while(*s) {
 tx(*s++);
 }
}
 
unsigned char rx()                                               // Funtion to recive the data
{
 while((U0LSR&(1<<0))==0);
 return U0RBR;
}