Lpc2000

--- In lpc2000@yahoogroups.com, Srinivasa Reddy Mannem 
<mannem_sri@y...> wrote:
> Hi,
>  
> I am working LPC2106 target board.
>  
> I am trying to write some data to hyper terminal using serial port 
( UART 0 ).
>  
> But i couldn't get that.
>  
> The crystal frequency of the board what i am using is 10MHz. And i 
set the baud rate as 9600.
>  
> To trace that i have included some printf statements in between my 
program.
>  
> I am getting those printf messages without any fail.
>  
> Then why i am not getting any charecter in hyper terminal window. 
>  
> Please go through the attached hello.c program and let me know 
where i am doing mistake.
>  
> Looking forward to hear from you.
>  
> Regards,
> -Srinivas.
>  


The source code :

*********************************************

#include <stdio.h>
#include "C:\DefectValidation\lpc210x.h"
typedef unsigned char uint8_t;
typedef unsigned int uint16_t;
#define FOSC		10000000    //10MHz.
#define PLL_M		4	
#define VPBDIV_VAL	1
#define UART_BAUD(baud) (uint16_t)(((FOSC*PLL_M/VPBDIV_VAL) / 
((baud) * 16.0)) + 0.5)
void delay(unsigned long int);
uint16_t i;
int main()
{
	uint8_t temp;
	uint16_t baud = 9600, baud_rate;
	
	PLLCFG = 0x23;
	PLLFEED = 0xAA;
	PLLFEED	= 0x55;
	PLLCON	= 0x01;
	PLLFEED	= 0xAA;
	PLLFEED	= 0x55;
	while(!(PLLSTAT & 0x0400)) {}
	PLLCON = 0x03;
	PLLFEED = 0xAA;
	PLLFEED = 0x55;
	VPBDIV = 0x01;
	PCONP = 0x08;
	
	PINSEL0		= 0x00000005;
	UART0_LCR 	= 0x83;
	baud_rate	= UART_BAUD(baud);
	printf("%d\n",baud_rate);	// it's giving 210 after 
that above calculation.
	UART0_DLL 	= (uint8_t)(baud_rate);                // 
set for baud low byte
  	UART0_DLM 	= (uint8_t)((baud_rate) >> 8);         // 
set for baud high byte
	printf("%x\n",UART0_DLL);
	printf("%x\n",UART0_DLM);	
	UART0_LCR 	= 0x03;		
	
	UART0_IER 	= 0x00;                         // disable 
all interrupts
  	
  	UART0_THR 	= 0x0;                              // clear 
line status register
	UART0_FCR 	= 0x01;
	UART0_THR 	= 'A';
	while(1)
	{	
		printf("Hello World..\n");
		printf("Welcome to LPC 2106 target board...\n");
		UART0_THR = 'B';
		delay(10000);
		
		while((UART0_LSR & 0x60) == 0);
		
	}
	return 0;
}
void delay(unsigned long int count)
{
	for(i=0;i<=count;i++)
	{
	}
}


**************************************

Regards,
-Srinivas.