Problem with PLL clock on LPC54102

[mostafadane]

Hi guys,

I have LPC54102 xpresso evaluation board for LPC54102j514BD64 and I am asked to writing the code to run the unit at maximum frequency,100 MHz, or let say 96 MHz.

the problem is that I followed every single step in data sheet and tried to toggling the on board LED with pll output clock. I Know that there is a library there bit I am restricted to do not use any library. the problem is that after I switching from IRC clock to Pll out clock the software can not execute any instruction anymore and I got the following error:

No source available for "0x5f809602".

here is my code:

#define AHBCLKCTRL0 *(volatile unsigned long *)(0x400000C0)

//defining the address of base of GPIO direction register

#define GPIO_BASE 0x1c000000

#define GPIO_DIRECTION_OFFSET 0x2000

#define GPIO1_DIRECTION_OFFSET 0x2004

#define GPIO_PORT0_DIRECTION_REGISTER *(volatile unsigned long *)(GPIO_BASE+GPIO_DIRECTION_OFFSET)

#define GPIO_PORT1_DIRECTION_REGISTER *(volatile unsigned long *)(GPIO_BASE+GPIO1_DIRECTION_OFFSET)

//defining the GPIO Register address for toggling

#define GPIO_TOGGLE_OFFSET 0x2300

#define GPIO_PORT0_TOGGLE_REGISTER *(volatile unsigned long *)(GPIO_BASE+GPIO_TOGGLE_OFFSET)

//defining GPIO port0 pin register

#define GPIO_PORT0_PIN_REGISTER_OFFSET 0x2100

#define GPIO_PORT0_PIN_REGISTER    *(volatile unsigned long *)(GPIO_BASE+GPIO_PORT0_PIN_REGISTER_OFFSET)

//define the main clock register

#define MAINCLKSELB *(volatile unsigned long *)(0x40000084)

//define the divider value

#define AHBCLKDIV *(volatile unsigned long *)(0x40000100)

// define the selector of PLL input

#define SYSPLLCLKSEL *(volatile unsigned long *)(0x400000A0)

//define system pll control register

#define SYSPLLCTRL *(volatile unsigned long *)(0x400001B0)

//define the main clock source register

#define MAINCLKSELA *(volatile unsigned long *)(0x40000080)

//define System PLL N-divider register

#define SYSPLLNDEC *(volatile unsigned long *)(0x400001B8)

// define pll p dec

#define SYSPLLPDEC *(volatile unsigned long *)(0x400001BC)

// define pll setting MDEC

#define SYSPLLSSCTRL0 *(volatile unsigned long *)(0x400001C0)

//define RTC oscillator control register

#define RTC_oscillator_control *(volatile unsigned long *)(0x40000190)

//define the source for asynchronize

#define ASYNCAPBCLKSELA *(volatile unsigned long *)(0x40080020)

// define the source for asyncronize

#define ASYNCAPBCLKSELB *(volatile unsigned long *)(0x40080024)

// define Asynchronous APB clock divider register

#define ASYNCCLKDIV *(volatile unsigned long *)(0x40080028)

//define ADC clock source select

#define ADCCLKSEL *(volatile unsigned long *)(0x4000008C)

//define ADC clock source divider

#define ADCCLKDIV *(volatile unsigned long *)(0x40000108)

//define CLKOUT clock source select register

#define CLKOUTSELA *(volatile unsigned long *)(0x40000094)

//define CLKOUT clock source select register

#define CLKOUTSELB *(volatile unsigned long *)(0x40000098)

//define CLKOUT clock divider register

#define CLKOUTDIV *(volatile unsigned long *)(0x4000010C)

//define the power register

#define PDRUNCFGSET *(volatile unsigned long *)(0x40000214)

#define PDRUNCFGCLR *(volatile unsigned long *)(0x40000218)

#define FREQMEAS_TARGET *(volatile unsigned long *)(0x40050164)

#define FREQMECTRL  *(volatile unsigned long *)(0x40000120)

#define FREQMEAS_REF *(volatile unsigned long *)(0x40050160)

#define CLKOUTSELA        *(volatile unsigned long *)(0x40000094)

#define CLKOUTSELB        *(volatile unsigned long *)(0x40000098)

#define CLKOUTDIV        *(volatile unsigned long *)(0x4000010C)

#define SYSPLLSTAT        *(volatile unsigned long *)(0x400001B4)

#define AHBCLKCTRLSET0     *(volatile unsigned long *)(0x400000C8)

#define AHBCLKCTRLCLR0    *(volatile unsigned long *)(0x400000D0)

#define RTCOSCCTRL         *(volatile unsigned long *)(0x40000190)

#define CTRL            *(volatile unsigned long *)(0x400000C0)

#define AHBCLKCTRLSET1    *(volatile unsigned long *)(0x400000CC)

#define AHBCLKCTRL1        *(volatile unsigned long *)(0x400000C4)

#define SYSTICKCLKDIV    *(volatile unsigned long *)(0x400000E0)

#define IOCON_P021        *(volatile unsigned long *)(0x4001C054)

int main(void)

{

double x, y, sumProduct;

int i;

int k;

int k2;

int k3;

int s;

k=0;

k2=0;

k3=0;

i=0;

x=0.00254987;

y=0.254895;

sumProduct=0;

AHBCLKCTRLSET0 = (1<<13) | (1<<14) | (1<<15)

SYSTICKCLKDIV = 0x1;

PDRUNCFGSET = (1<<22);

SYSPLLCLKSEL = 0x00;

SYSPLLCTRL = 0x00151d00;

SYSPLLSSCTRL0 = (1<<18) |  0x7f55;

SYSPLLSSCTRL0 |= (1<<17);

SYSPLLSSCTRL0 &= ~(1<<17);

SYSPLLNDEC =  0x01;

SYSPLLNDEC |= (1<<10);

SYSPLLNDEC &= ~(1<<10);

SYSPLLPDEC =  0x7f;

SYSPLLPDEC |= (1<<7);

SYSPLLPDEC &= ~(1<<7);

PDRUNCFGCLR = (1<<22);

k = SYSPLLSTAT;

while (i<1000000)

{

    i++;

}

    k = SYSPLLSTAT;

    IOCON_P021 = 0x1;

    MAINCLKSELB = 0x02;

    GPIO_PORT0_DIRECTION_REGISTER |= (0x40000000);

    while (1){

    GPIO_PORT0_TOGGLE_REGISTER |= (0x40000000);

    for(i=0;i<100000;i++)

    sumProduct+=x*y;

    }

    return 0 ;

}

[rolfmeeser]

Without looking at the details of your PLL programming, it seems like you're powering it down again before using it:

PDRUNCFGCLR = (1<<22);

Also use the built-in power management routines (call the set_voltage() power profile API function to announce your operating frequency). The device will not run at 100 MHz if you don't.

[gossamer69]

Apart from powering down the PLL. How do you call set_voltage API function. Datasheet is quite vague on details...

So from datasheet:

typedef struct _PWRD {

  unsigned int (*set_pll)(unsigned int mul, unsigned int inFreq);

  unsigned int (*set_voltage)(unsigned int mode, unsigned int desFreq);

  void (*power_mode_configure)(unsigned int mode, unsigned int peripheral);

}PWRD;

#define rom_driver_ptr (*(ROM)**) 0x03000200

pPWRD = (PWRD*)(rom_driver_ptr->pPWRD);

pPWRD->set_voltage(??, 96000000);

What I dont understand from this is,

- how is ROM defined

- what is pPWRD

- what is param0 in set_voltage. There is only description mode =0 for low power mode .. should I select some arbitrary value here ?

Thanks...

[gossamer69]

https://community.nxp.com/thread/432979‌ is the solution to this.