DC Motor Control Using ARM7 (LPC2148)

gistfile1.txt

#include<lpc214x.h> 

#define MOTOR (1<<18) | (1<<19)
#define BUTTON (1<<16)

int main()
{
  unsigned char i=0; 

  PINSEL0 = 0x00000000;
  PINSEL1 = 0x00000000;
  PINSEL2 = 0x00000000;
	
  IODIR1 = MOTOR;
  IODIR0 = IODIR0 & (~BUTTON);
	
  PLL0CON = 0x01;
  PLL0CFG = 0x24;
  PLL0FEED = 0xAA;
  PLL0FEED = 0x55;
  while(!(PLL0STAT & 0x00000400));
  PLL0CON = 0x03;
  PLL0FEED = 0xAA;
  PLL0FEED = 0x55;
  VPBDIV = 0x01; 
		
  while(1)
  {
    while((IOPIN0 & BUTTON)==0);
    i=~i;

    if(i==0xFF)
    {
      IOSET1 = (1<<18);
      IOCLR1 = (1<<19);
    }
    else
    {
      IOSET1 = (1<<19);
      IOCLR1 = (1<<18);
    }
	
    while((IOPIN0 & BUTTON)==0x00010000);
  }
}