Using External Crystal on MSP432 Launchpad using RTL OS

Hello everyone!

Spent some days trying to figure out something but... so here i am today :)

I'm using MSP432 Launchpad with multi-tasking with RTL.h.

The code works fine (well almost... ^^"). The problem now is that i can't program the main clock MCLK to be sourced on the external crystal of the launchpad.

I used the same code as the TI example one, which works fine alone, but doesn't on my application.

With an oscilloscope i notice a MCLK at 5MHz (or 2.5 if i divide), so i guessed this was the fail-proof SYSOSC because my HFXT doesn't work.

I tried to enable interrupts with CS_enableInterrupt(CS_HFXT_FAULT) and that brought me in an endless loop in NMI-Handler.

I hope I've been understood, sorry for my french accent :/ ,

and thanks for every comment you could have to find a new path :)

Here is my code:

	CS_setExternalClockSourceFrequency(32768,48000000);   //set frequency of external oscilators
	
		GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_PJ,GPIO_PIN1,GPIO_PRIMARY_MODULE_FUNCTION);
		GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_PJ,GPIO_PIN0,GPIO_PRIMARY_MODULE_FUNCTION);  //set PJ.0 as special input for LF crystal
		
		GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_PJ,GPIO_PIN2,GPIO_PRIMARY_MODULE_FUNCTION);
		GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_PJ,GPIO_PIN3,GPIO_PRIMARY_MODULE_FUNCTION);  //set PJ.3 as special input for LF crystal

		PCM_setCoreVoltageLevelWithTimeout(PCM_VCORE1,10000);
	
		noerror=CS_startHFXT(false);   //set external HF oscilator , no bypass
		CS_startLFXT( CS_LFXT_DRIVE3);   //set external LF oscilator, no bypass
		CS_initClockSignal(CS_ACLK,CS_LFXTCLK_SELECT,CS_CLOCK_DIVIDER_1);   //ACLK on LF crystal
		CS_initClockSignal(CS_MCLK,CS_HFXTCLK_SELECT,CS_CLOCK_DIVIDER_2);   //MCLK on HF crystal
		CS_initClockSignal(CS_BCLK,CS_LFXTCLK_SELECT,CS_CLOCK_DIVIDER_1);   //BCLK on LF crystal
		CS_initClockSignal(CS_SMCLK,CS_HFXTCLK_SELECT,CS_CLOCK_DIVIDER_2);  //SMCLK on HF crystal
		CS_initClockSignal(CS_HSMCLK,CS_HFXTCLK_SELECT,CS_CLOCK_DIVIDER_2); //HSMCLK on HF crystal

		CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_1_5);  //set DCO at 1.5MHz
		Mclk=CS_getMCLK();
		
		/*CS_enableFaultCounter(CS_HFXT_FAULT_COUNTER);
		CS_startFaultCounter(CS_HFXT_FAULT_COUNTER,CS_FAULT_COUNTER_4096_CYCLES);
		CS_resetFaultCounter(CS_HFXT_FAULT_COUNTER);
		Interrupt_enableMaster();
		CS_enableInterrupt(CS_STARTCOUNT_HFXT_FAULT);*/

we can notice that the LFCLK does work correctly