Can anybody help me out on reading a Tach signal from DC fan and controlling an LED on/off. MCU - LPC1768

See my code, which is not counting/reading external pulse from fan. checking with different fan types but did not get pulse.

Please help me to resolve.

#include <lpc17xx.h>
#include "uart.h"
#include "delay.h"

#define LED 0

volatile uint32_t Freq, Freq2;

int main (void)
{
UART0_Init(9600);
LPC_SC->PCONP |= ( 1 << 15 ); // power up GPIO
LPC_GPIO0->FIODIR |= 1 << LED; // puts P0.0 into output mode.

//Initialization of the counter on P1.19 as CAP1.1
LPC_SC->PCONP |= 1 << 2; //Power up TimerCounter1
LPC_TIM1->TCR |= 1 << 0; // Counter mode
LPC_TIM1->CTCR |= 3; // Count on falling edges
LPC_TIM1->CTCR |= 1 << 2; // CAP1.1 is the input pin for which the input signal needs to be connected.
LPC_PINCON->PINSEL3 |= ((1 << 7) | (1 << 6));; // Make P1.19 as CAP1.1

LPC_TIM1->TCR = 0x1; // Enable counter

//Initialization of the timer which generates interrupt once in a second
LPC_SC->PCONP |= 1 << 1; //Power up Timer0

LPC_TIM0->MR0 = 12499999; // Assuming that clk freq = 100 MHz, this value is calculated to generate an interrupt once in a second.
LPC_TIM0->MCR = 3; //interrupt and reset control

NVIC_EnableIRQ(TIMER0_IRQn); //enable timer0 interrupt

LPC_TIM0->TCR = 1; //enable Timer0

while(1)
{
UART0_TxFloatNumber(Freq);
UART0_Printf("\n");
DELAY_ms(500);
UART0_TxFloatNumber(Freq2);
UART0_Printf("\n");
}

}

void TIMER0_IRQHandler (void)
{
LPC_TIM1->TCR = 1;

if((LPC_TIM0->IR & 0x01) == 0x01) // if MR0 interrupt
{

LPC_TIM0->IR |= 1 << 0; // Clear MR0 interrupt flag

Freq = LPC_TIM1->TC; // Read the counter value
Freq2 = LPC_TIM0->TC;

LPC_TIM1->TCR |= 1 << 1 ; // Reset the counter
LPC_GPIO0->FIOPIN ^= (1<<LED); /* Toggle the LED (P0_0) */

}

}