Transmit Data From UART0 & UART1

UART0 and UART1

Transmit Data from UART0/UART1 module on LPC 2148

//————————————————————————————————————————————————————————————————————————//
// Program : Library for serial communication(UART)
// Description : Library for about serial communication UART0 and UART1 of LPC2148
// Frequency : Crystal 12 MHz at PLL 5x(CCLK = 60 MHz),PCLK = 30 MHz
// Filename : uart.h
// C compiler : Keil CARM Compiler
//————————————————————————————————————————————————————————————————————————//
#define _PCLK 30000000 // Define PCLK for configuration baudrate
#define uart1_setbaud(x) uart1_init(x) // Define function name uart1_setbaud equal uart1_init
#define uart0_setbaud(x) uart0_init(x) // Define function name uart0_setbaud equal uart0_init
//—————————————— Function for Initial UART1 ————————————————————//
void uart1_init(unsigned int _baudrate)
{
unsigned short u1dl;
u1dl = _PCLK/(16*_baudrate); // Calculate for U1DL value
PINSEL0 |= 0x00050000; // Enable rx,tx
U1LCR = 0x00000083; // 8 bit data,1 stop bit,no parity bit
U1DLL = u1dl & 0xFF; // U1DL for low byte
U1DLM = (u1dl>>8); // U1DL for high byte
U1LCR = 0x00000003; // DLAB =0
}
//—————————————— Function for send character 1 time via UART1———————————//
void uart1_putc(char c)
{
while(!(U1LSR & 0x20)); // Wait until UART1 ready to send character
U1THR = c; // Send character
}
//—————————————— Function for send string via UART1————————————————//
void uart1_puts(char *p)
{
while(*p) // Point to character
{
uart1_putc(*p++); // Send character then point to next character
}
}

//—————————————— Function for Initial UART0 ————————————————————//
void uart0_init(unsigned int _baudrate)
{
unsigned short u0dl;
u0dl = _PCLK/(16*_baudrate); // Calculate for U0DL value
PINSEL0 |= 0x00000005; // Enable rx,tx
U0LCR = 0x00000083; // 8 bit data,1 stop bit,no parity bit
U0DLL = u0dl & 0xFF; // U0DL for low byte
U0DLM = (u0dl>>8); // U0DL for high byte
U0LCR = 0x00000003; // DLAB =0
}
//—————————————— Function for send character 1 time via UART0———————————//
void uart0_putc(char c)
{
while(!(U0LSR & 0x20)); // Wait until UART0 ready to send character
U0THR = c; // Send character
}
//—————————————— Function for send string via UART1————————————————//
void uart0_puts(char *p)
{
while(*p) // Point to character
{
uart0_putc(*p++); // Send character then point to next character
}
}

//—————————————————————————————————————————————————————————————————————————//
// Program : UART example
// Description : Example for test module UART0 and UART1
// Frequency : Crystal 12 MHz at PLL 5x(CCLK = 60 MHz),PCLK = 30 MHz
// Filename : uart_0_1.c
// C compiler : Keil CARM Compiler
//—————————————————————————————————————————————————————————————————————————//
#include “lpc214x.h” // Header file for Phillips LPC2148 controller
#include “uart.h” // Library for module UART0,UART1(from jx2148_include folder)
#include “stdio.h” // Library for use printf function(For UART1)
//————————————————— Initial system clock ————————————————————//
void init()
{
PLL0CFG=0x24; // MSEL = 4,PSEL = 2
PLL0FEED=0xAA; // Feed process
PLL0FEED=0x55;
PLL0CON=0x1;
PLL0FEED=0xAA; // Feed process
PLL0FEED=0x55;
while(!(PLL0STAT & 0x400)) ; // Wait until PLL Locked
PLL0CON=0x3; // Connect the PLL as the clock source
PLL0FEED=0xAA; // Feed process
PLL0FEED=0x55;
MAMCR=0x2; // Enabling MAM and setting number of clocks used
// for Flash memory fetch (4 cclks in this case)
MAMTIM=0x4;
VPBDIV=0x02; // PCLK at 30 MHz
}

//————————————————— Main Program ————————————————————————//
void main()
{
init(); // Initialize the system
SCS = 0x03; // select the “fast” version of the I/O ports
uart0_init(9600);
// Initial UART0 @ 9600 bps,8 bit data ,1 stop bit ,no parity bit
uart1_init(9600);
// Initial UART1 @ 9600 bps,8 bit data ,1 stop bit ,no parity bit
while (1)
{
uart0_puts(“Test UART0\r\n”); // Send string to UART0
printf(“Test UART1\r\n”); // Send string to UART1
}
}