Timers in LPC2148

Code:

#include

void initClocks(void); // Setup PLL and Clock Frequency

void initTimer0(void); // Setup and Initialize Timer0

void delay_ms(unsigned int counts); // Generate delay

int main(void)

{

initClocks(); //Initialize CPU and Peripheral Clocks @ 60Mhz

initTimer0(); //Initialize Timer0

IO0DIR = (1

while(1)

{

IO0SET = (1

delay_ms(1000);

IO0CLR = (1

delay_ms(1000);

}

//return 0;

}

void initTimer0(void)

{

T0CTCR = 0x0; //Set Timer 0 into Timer Mode

T0PR = 59999; //Increment T0TC at every 60000 clock cycles

//Count begins from zero hence subtracting 1

//60000 clock cycles @60Mhz = 1 mS

T0TCR = 0x02; //Reset Timer

}

void delay_ms(unsigned int counts) //Using Timer0

{

T0TCR = 0x02; //Reset Timer

T0TCR = 0x01; //Enable timer

while(T0TC

T0TCR = 0x00; //Disable timer

}

void initClocks(void)

{

PLL0CON = 0x01; //Enable PLL

PLL0CFG = 0x24; //Multiplier and divider setup

PLL0FEED = 0xAA; //Feed sequence

PLL0FEED = 0x55;

while(!(PLL0STAT & 0x00000400)); //is locked?

PLL0CON = 0x03; //Connect PLL after PLL is locked

PLL0FEED = 0xAA; //Feed sequence

PLL0FEED = 0x55;

VPBDIV = 0x01; // PCLK is same as CCLK i.e.60 MHz

}

7.6 Lab Tasks: 7.6.1Task 1: After making the necessary settings for your timer to generate a delay of 1 milliseconds, write a function that generates a delay of N milliseconds. Call your function delayMilliSec(t). Using the same approach, write a function that generates delays of microseconds. Call your function delayMicroSec(t); 7.6.2 Task 2: The loop used to wait for the delay to elapse contains a compare instruction: while(TOTC