FOR THE LPC1768 answer the following Q1: Write the memory address for Port 1 FIO

Question

FOR THE LPC1768 answer the following

Q1: Write the memory address for Port 1 FIO1DIR, FIO1MASK, FIO1PIN, FIO1SET, FIO1CLR.

FIO1DIR: _________________       FIO1MASK: ________________

            FIO1PIN: __________________       FIO1SET:    _________________

            FIO1CLR: _________________

Q2: Write a short C code to define Port 1 Pin 28 as output.

___________________________________________________________

Q3: Write a short C code to set (assign 1) and reset (assign 0) port 1 pin 28. To set port 1 pin 28, is there another way to do it?

            Set port 1 pin 28 : __________________________________________

            Clr port 1 pin 28: __________________________________________

Q4: Assume that the system CPU clock is 100 Mhz, and the CPU clock is selected for LPC1768 system tick source, what is the maximum time period that the system tick can count? What is the time constant to be loaded into the system tick register if 10ms counting time period is needed?

Max counting time: ________________________________________________________

    Time constant for 10 ms period: _____________________

Q5: The PCONP register allows turn off selected peripheral functions for the purpose of saving power. Find out the memory address of PCONP. Write a short C code to enable GPIO clock.

PCONP Memory address: _______________________________

Enable GPIO clock: ____________________________________

Explanation / Answer

5.....C code to enable GPIO clock

int main(void){
int *crh;
int *odr;
int *apb2enr;
int i;
crh=(int*)(0x40010C04);
odr=(int*)(0x40010C0C);
apb2enr=(int*)0x40021018;
*apb2enr|=0x0008;
*crh=0x33333333;
for(;;){
for(i=0;i<0x40000;i++){
}
*odr=0x0000aaaa;
for(i=0;i<0x40000;i++){
}*odr=0x00005555;

}

}

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