LPC11U68 with CMSIS CORE

[Badman]

I bought LPCXpresso11U68. I cant' write a running program without LPCOpen.

When I write a program that uses CMSIS Core and registers, the program stops in function SystemInit:

void SystemInit (void) {
  volatile uint32_t i;

#if (CLOCK_SETUP)                                 /* Clock Setup              */

#if ((SYSPLLCLKSEL_Val & 0x03) == 1)
  LPC_SYSCON->PDRUNCFG     &= ~(1 << 5);          /* Power-up System Osc      */
  LPC_SYSCON->SYSOSCCTRL    = SYSOSCCTRL_Val;
  for (i = 0; i < 200; i++) __NOP();
#endif

  LPC_SYSCON->SYSPLLCLKSEL  = SYSPLLCLKSEL_Val;   /* Select PLL Input         */
  LPC_SYSCON->SYSPLLCLKUEN  = 0x01;               /* Update Clock Source      */
  LPC_SYSCON->SYSPLLCLKUEN  = 0x00;               /* Toggle Update Register   */
  LPC_SYSCON->SYSPLLCLKUEN  = 0x01;
  while (!(LPC_SYSCON->SYSPLLCLKUEN & 0x01));     /* Wait Until Updated       */
#if ((MAINCLKSEL_Val & 0x03) == 3)                /* Main Clock is PLL Out    */
  LPC_SYSCON->SYSPLLCTRL    = SYSPLLCTRL_Val;
  LPC_SYSCON->PDRUNCFG     &= ~(1 << 7);          /* Power-up SYSPLL          */
  while (!(LPC_SYSCON->SYSPLLSTAT & 0x01));           /* Wait Until PLL Locked    */
#endif

#if (((MAINCLKSEL_Val & 0x03) == 2) )
  LPC_SYSCON->WDTOSCCTRL    = WDTOSCCTRL_Val;
  LPC_SYSCON->PDRUNCFG     &= ~(1 << 6);          /* Power-up WDT Clock       */
  for (i = 0; i < 200; i++) __NOP();
#endif

  LPC_SYSCON->MAINCLKSEL    = MAINCLKSEL_Val;     /* Select PLL Clock Output  */
  LPC_SYSCON->MAINCLKUEN    = 0x01;               /* Update MCLK Clock Source */
  LPC_SYSCON->MAINCLKUEN    = 0x00;               /* Toggle Update Register   */
  LPC_SYSCON->MAINCLKUEN    = 0x01;
  while (!(LPC_SYSCON->MAINCLKUEN & 0x01));       /* Wait Until Updated       */

  LPC_SYSCON->SYSAHBCLKDIV  = SYSAHBCLKDIV_Val;

#if ((USBCLKDIV_Val & 0x1FF) != 0)                /* USB clock is used        */
  LPC_SYSCON->PDRUNCFG     &= ~(1 << 10);         /* Power-up USB PHY         */

#if ((USBCLKSEL_Val & 0x003) == 0)                /* USB clock is USB PLL out */
  LPC_SYSCON->PDRUNCFG     &= ~(1 <<  8);         /* Power-up USB PLL         */
  LPC_SYSCON->USBPLLCLKSEL  = USBPLLCLKSEL_Val;   /* Select PLL Input         */
  LPC_SYSCON->USBPLLCLKUEN  = 0x01;               /* Update Clock Source      */
  LPC_SYSCON->USBPLLCLKUEN  = 0x00;               /* Toggle Update Register   */
  LPC_SYSCON->USBPLLCLKUEN  = 0x01;
  while (!(LPC_SYSCON->USBPLLCLKUEN & 0x01));     /* Wait Until Updated       */
  LPC_SYSCON->USBPLLCTRL    = USBPLLCTRL_Val;
  while (!(LPC_SYSCON->USBPLLSTAT   & 0x01));     /* Wait Until PLL Locked    */
  LPC_SYSCON->USBCLKSEL     = 0x00;               /* Select USB PLL           */
#endif

  LPC_SYSCON->USBCLKSEL     = USBCLKSEL_Val;      /* Select USB Clock         */
  LPC_SYSCON->USBCLKDIV     = USBCLKDIV_Val;      /* Set USB clock divider    */

#else                                             /* USB clock is not used    */                        
  LPC_SYSCON->PDRUNCFG     |=  (1 << 10);         /* Power-down USB PHY       */
  LPC_SYSCON->PDRUNCFG     |=  (1 <<  8);         /* Power-down USB PLL       */
#endif

#endif

  /* System clock to the IOCON needs to be enabled or
  most of the I/O related peripherals won't work. */
  LPC_SYSCON->SYSAHBCLKCTRL |= (1<<16);

}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Program stops here:

#if ((MAINCLKSEL_Val & 0x03) == 3)                /* Main Clock is PLL Out    */
  LPC_SYSCON->SYSPLLCTRL    = SYSPLLCTRL_Val;
  LPC_SYSCON->PDRUNCFG     &= ~(1 << 7);          /* Power-up SYSPLL          */
  while (!(LPC_SYSCON->SYSPLLSTAT & 0x01));           /* Wait Until PLL Locked    */
#endif‍‍‍‍‍

Why never PLL loked ???

My program only:

#include "LPC11Uxx.h"

void delay(uint32_t delay_ticks)
{
     for(; delay_ticks != 0; delay_ticks--)
          __NOP;
}
int main(void) {
    volatile static int i = 0 ;

    LPC_GPIO->DIR[2] |= 1<<18;

    while(1) {
         LPC_GPIO->CLR[2] = 1<<18;
         delay(2000000);
        LPC_GPIO->SET[2] = 1<<18;
        delay(2000000);
        i++''
    }
    return 0 ;
}
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[simonwang]

#include "LPC11U6x.h"

[jeremyzhou]

Hi Tom Gut,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.

I'd highly recommend you to refer to the demo which is provided from the Keil IDE, it can works well on the LPCXpressor11U68.

Have a great day,
TIC

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