LPC1769 Clock Source Select Not Working

alexanderwashin — Thu, 22 Feb 2018 22:40:32 GMT

My debugger crashes when the main oscillator is connected to the PLL.

void SystemInit (void)
{
#if (CLOCK_SETUP) /* Clock Setup */
LPC_SC->SCS = SCS_Val;
LPC_SC->SCS = 0; /* Debug mode, Int. Oscillator */
if (SCS_Val & (1 << 5)) { /* If Main Oscillator is enabled */
while ((LPC_SC->SCS & (1<<6)) == 0);/* Wait for Oscillator to be ready */
}
LPC_SC->CCLKCFG = CCLKCFG_Val; /* Setup Clock Divider */
LPC_SC->PCLKSEL0 = PCLKSEL0_Val; /* Peripheral Clock Selection */
LPC_SC->PCLKSEL1 = PCLKSEL1_Val;
LPC_SC->CLKSRCSEL = CLKSRCSEL_Val; /* Select Clock Source for PLL0 */

The debugger crashes on the last line of code. I use an oscillator that generates a 12MHz clock. The schematic is shown below.

Any ideas of why it is crashing?

Re: LPC1769 Clock Source Select Not Working

alexanderwashin — Sat, 24 Feb 2018 12:42:45 GMT

It's suddenly working...

LPC MicrocontrollersのトピックLPC1769 Clock Source Select Not Working

LPC1769 Clock Source Select Not Working

Re: LPC1769 Clock Source Select Not Working