It is failed to set break point when debugging with following MCG configuration.
It run well without debugging.
const mcglite_config_t mcgliteConfig_BOARD_BootClockRUN =
    {
        .outsrc=kMCGLITE_ClkSrcExt,             /* MCGOUTCLK source is external clock source */
        .irclkEnableMode = MCG_IRCLK_DISABLE,     /* MCGIRCLK disabled */
        .ircs = kMCGLITE_Lirc8M,                  /* Slow internal reference (LIRC) 8 MHz clock selected */
        .fcrdiv = kMCGLITE_LircDivBy1,            /* Low-frequency Internal Reference Clock Divider: divided by 1 */
        .lircDiv2 = kMCGLITE_LircDivBy1,          /* Second Low-frequency Internal Reference Clock Divider: divided by 1 */
        .hircEnableInNotHircMode = false,         /* HIRC source is not enabled */
    };
Error report
My board is FRDM-MCXC242.
How to deal with the problem?
 
					
				
		
 Alice_Yang
		
			Alice_Yang
		
		
		
		
		
		
		
		
	
			
		
		
			
					
		Hello @limit1995
Could you please show me where you set the breakpoint? And which demo did you use? I will help to check on my side. Thank you.
BR
Alice
Dear @Alice_Yang
I set the clock configuration based on demo app led_blinky.
Then update the source files.
And step-by-step dubugging caused error like below.
The part of the automatically generated clock_config.c is as follows:
void BOARD_InitBootClocks(void)
{
    BOARD_BootClockRUN();
}
/*******************************************************************************
 ********************** Configuration BOARD_BootClockRUN ***********************
 ******************************************************************************/
/* clang-format off */
/* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
!!Configuration
name: BOARD_BootClockRUN
called_from_default_init: true
outputs:
- {id: Bus_clock.outFreq, value: 16.384 kHz}
- {id: Core_clock.outFreq, value: 32.768 kHz}
- {id: ERCLK32K.outFreq, value: 32.768 kHz}
- {id: Flash_clock.outFreq, value: 16.384 kHz}
- {id: LPO_clock.outFreq, value: 1 kHz}
- {id: MCGIRCLK.outFreq, value: 8 MHz}
- {id: MCGPCLK.outFreq, value: 48 MHz}
- {id: OSCERCLK.outFreq, value: 32.768 kHz}
- {id: System_clock.outFreq, value: 32.768 kHz}
settings:
- {id: MCGMode, value: EXT}
- {id: MCG.CLKS.sel, value: SIM.OSCCLK}
- {id: MCG_C2_OSC_MODE_CFG, value: ModeOscLowPower}
- {id: MCG_MC_HIRCEN_CFG, value: Enabled}
- {id: OSC0_CR_ERCLKEN_CFG, value: Enabled}
- {id: OSC_CR_ERCLKEN_CFG, value: Enabled}
- {id: OSC_CR_SYS_OSC_CAP_LOAD_CFG, value: SC12PF}
- {id: SIM.CLKOUTSEL.sel, value: MCG.MCGPCLK}
- {id: SIM.COPCLKSEL.sel, value: OSC.OSCERCLK}
- {id: SIM.FLEXIOSRCSEL.sel, value: MCG.MCGPCLK}
- {id: SIM.LPUART0SRCSEL.sel, value: MCG.MCGPCLK}
- {id: SIM.LPUART1SRCSEL.sel, value: MCG.MCGPCLK}
- {id: SIM.RTCCLKOUTSEL.sel, value: OSC.OSCERCLK}
- {id: SIM.TPMSRCSEL.sel, value: MCG.MCGPCLK}
- {id: SIM.USBSRCSEL.sel, value: MCG.MCGPCLK}
sources:
- {id: MCG.HIRC.outFreq, value: 48 MHz}
- {id: OSC.OSC.outFreq, value: 32.768 kHz, enabled: true}
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/
/* clang-format on */
/*******************************************************************************
 * Variables for BOARD_BootClockRUN configuration
 ******************************************************************************/
const mcglite_config_t mcgliteConfig_BOARD_BootClockRUN =
    {
        .outsrc=kMCGLITE_ClkSrcExt,             /* MCGOUTCLK source is external clock source */
        .irclkEnableMode = kMCGLITE_IrclkEnable,  /* MCGIRCLK enabled, MCGIRCLK disabled in STOP mode */
        .ircs = kMCGLITE_Lirc8M,                  /* Slow internal reference (LIRC) 8 MHz clock selected */
        .fcrdiv = kMCGLITE_LircDivBy1,            /* Low-frequency Internal Reference Clock Divider: divided by 1 */
        .lircDiv2 = kMCGLITE_LircDivBy1,          /* Second Low-frequency Internal Reference Clock Divider: divided by 1 */
        .hircEnableInNotHircMode = true,          /* HIRC source is enabled */
    };
const sim_clock_config_t simConfig_BOARD_BootClockRUN =
    {
        .er32ksrc=SIM_OSC32KSEL_OSC32KCLK_CLK,  /* OSC32KSEL select: OSC32KCLK clock */
        .clkdiv1 = 0x10000U,                      /* SIM_CLKDIV1 - OUTDIV1: /1, OUTDIV4: /2 */
    };
const osc_config_t oscConfig_BOARD_BootClockRUN =
    {
        .freq = 32768U,                           /* Oscillator frequency: 32768Hz */
        .capLoad = (kOSC_Cap4P | kOSC_Cap8P),     /* Oscillator capacity load: 12pF */
        .workMode = kOSC_ModeOscLowPower,         /* Oscillator low power */
        .oscerConfig =
            {
                .enableMode = kOSC_ErClkEnable,   /* Enable external reference clock, disable external reference clock in STOP mode */
            }
    };
/*******************************************************************************
 * Code for BOARD_BootClockRUN configuration
 ******************************************************************************/
void BOARD_BootClockRUN(void)
{
    /* Set the system clock dividers in SIM to safe value. */
    CLOCK_SetSimSafeDivs();
    /* Initializes OSC0 according to board configuration. */
    CLOCK_InitOsc0(&oscConfig_BOARD_BootClockRUN);
    CLOCK_SetXtal0Freq(oscConfig_BOARD_BootClockRUN.freq);
    /* Set MCG to EXT mode. */
    CLOCK_SetMcgliteConfig(&mcgliteConfig_BOARD_BootClockRUN);
    /* Set the clock configuration in SIM module. */
    CLOCK_SetSimConfig(&simConfig_BOARD_BootClockRUN);
    /* Set SystemCoreClock variable. */
    SystemCoreClock = BOARD_BOOTCLOCKRUN_CORE_CLOCK;
}
 
					
				
		
 Alice_Yang
		
			Alice_Yang
		
		
		
		
		
		
		
		
	
			
		
		
			
					
		Hello @limit1995
In MCG control register 1, it changes the clock source for the main clock. It cannot be debugged when the clock source is changed.
BR
Alice
Dear @Alice_Yang ,
It is ok to step-over BOARD_InitBootClocks() with HIRC mode.
But it is failed to step-over BOARD_InitBootClocks() or to set break point with EXT mode. Debugging is not possible at all.
Why?
And I want to know how to debug with EXT mode.
Thanks.
