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initialiazation of arm

Girish brahme

Dear All,

I am working my project of led Blinking.The controller used is arm7 LPC2214.Crystal is 11.0592mhz.
Which works fine but only one problem is, to make it working i have to touch one of my Oscilloscope probe to crystal of controller.Then it start working.Also works well in keil debugger(internal) and on proteus.So please help me to solve this problem.
The source code is as follows,


#include <lpc22xx.h>
#include <stdio.h>

#define VREF  3
#define Beep      0x00001000
#define LED1      0x00000800
#define LED2      0x00000400
#define LED3      0x00000200
#define LED4      0x00000100
#define CE                0x00000001
#define OE                0x00000002
#define WE                0x08000000




#define low   IO0CLR = LED1 ;   \ 
              IO0CLR = LED2 ;   \ 
              IO0CLR = Beep ;


#define hig   IO0SET  = LED1 ;   \ 
              IO0SET  = LED2 ;   \ 
              IO0SET  = Beep ;

unsigned int val;


unsigned long Fosc = 11059200;
unsigned long Fcclk = 0;
unsigned long Fcco = 0;
unsigned long Fpclk = 0 ;


        void TargetResetInit(void)
        {
        Fcclk = Fosc * 4;
                Fcco = Fcclk * 4;
                Fpclk = (Fcclk / 4) * 1  ;

                MEMMAP = 0x2;                   //remap
            PLLCON = 3;
                if ((Fpclk / (Fcclk / 4)) == 1)
                VPBDIV = 0x10;
                else if ((Fpclk / (Fcclk / 4))== 2)
                                VPBDIV = 0x11;
                         else if ((Fpclk / (Fcclk / 4)) ==  4)
                                        VPBDIV = 1;
                if ((Fcco / Fcclk) == 2)
                PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
                else if ((Fcco / Fcclk) == 4)
                PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5);
                else if ((Fcco / Fcclk) == 8)
                PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5);
                else if ((Fcco / Fcclk) == 16)
                PLLCFG = ((Fcclk / Fosc) - 1) | (3 << 5);
                PLLFEED = 0xaa;
        PLLFEED = 0x55;
        while((PLLSTAT & (1 << 10)) == 0);
        PLLCON = 3;
        PLLFEED = 0xaa;
        PLLFEED = 0x55;

            MAMCR = 0;
                if( Fcclk < 20000000)
                MAMTIM = 1;
                else
                if ( Fcclk < 40000000)
                MAMTIM = 2;
                else
                MAMTIM = 3;
            MAMCR = 2;
                VICIntEnClr = 0xffffffff;
        VICVectAddr = 0;
        VICIntSelect = 0;
}



void Delay (unsigned long a) {
  while (--a!=0);
}

 void ledInit(void)
 {

   IO2DIR = 0xFFFFFFFF;
   IO2SET = 0;

   IO1PIN = 0x00000000;
   IO1DIR |= CE;
   IO1DIR |= OE;
   IODIR1 |= CE;
   IODIR1 |= OE;

   IO1SET |= CE;
   IO1SET |= OE;

   IO3DIR = 0xFFFFFFFF;
   IO3SET = WE;

   IO0DIR = LED1;
   IO0SET |= LED1;
}

static void ledOn(int led){
   IO0CLR = led;
}

static void ledOff(int led){
   IO0SET = led;
}

void delay(int d){
  for(; d; --d);
}




   int main(void)
   {
          ledInit();
          TargetResetInit();
      ledOn(LED2);
          ledInit();

           while(1)
       {
        ledOn(LED1);
        delay(20000*8);
        delay(20000*8);
        delay(20000*8);
        delay(20000*8);
        delay(20000*8);

        ledOff(LED1);
                delay(20000*8);
        delay(20000*8);
        delay(20000*8);
        delay(20000*8);
        delay(20000*8);
      }

}

Thanks & regards,
Girish

Parents
  • 0 in reply to ImPer Westermark

    Hi,

    As i said in my last post, yes i used numbers because the lpc 2214 controller doesn’t have register like CLKSRCSEL like you have in 23x or 21x series, also not have the definition for it in lpc2214.h header file and in startup’s file. As you said to enable the main oscillator i used code which is given in keil website. Which is not explained in detailed in user manual . So it was not clear for me also about Enabling the main oscillator. And about sentence "The controller used is arm7 LPC2214.Crystal is 11.0592mhz." it is for explanation in short for my controller and peripheral. And about me i worked on lpc2148 also working on embedded systems from last 4 years. But first time i faced such situation where not much choice for major change in hardware as old code is well running & proven. So write post for my difficulties and problem. It is clear that there is issue initialization code for oscillator. But struggling to sort it out.
    So i request you to Please help me to sort it out,

    Thanks in advance,

    Girish

Reply
  • 0 in reply to ImPer Westermark

    Hi,

    As i said in my last post, yes i used numbers because the lpc 2214 controller doesn’t have register like CLKSRCSEL like you have in 23x or 21x series, also not have the definition for it in lpc2214.h header file and in startup’s file. As you said to enable the main oscillator i used code which is given in keil website. Which is not explained in detailed in user manual . So it was not clear for me also about Enabling the main oscillator. And about sentence "The controller used is arm7 LPC2214.Crystal is 11.0592mhz." it is for explanation in short for my controller and peripheral. And about me i worked on lpc2148 also working on embedded systems from last 4 years. But first time i faced such situation where not much choice for major change in hardware as old code is well running & proven. So write post for my difficulties and problem. It is clear that there is issue initialization code for oscillator. But struggling to sort it out.
    So i request you to Please help me to sort it out,

    Thanks in advance,

    Girish

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