Hi Nathan sowie,
1. CLKOUT pin
If you want to use the CLKOUT pin, you can enable the according pin as the CLKOUT function.
From the user manual, you can get that:
If I select PIO0_26 as the CLKOUT function, you can use this code:
void BOARD_InitPins(void) { /* Function assigned for the Core #0 (ARM Cortex-M4) */
CLOCK_EnableClock(kCLOCK_Iocon); /* Enables the clock for the IOCON block. 0 = Disable; 1 = Enable.: 0x01u */
IOCON->PIO[0][26] = ((IOCON->PIO[0][26] &
(~(IOCON_PIO_FUNC_MASK | IOCON_PIO_DIGIMODE_MASK))) /* Mask bits to zero which are setting */
| IOCON_PIO_FUNC(PIO026_FUNC_ALT2) /* Selects pin function.: PORT026 (pin M13) is configured as CLKOUT */
| IOCON_PIO_DIGIMODE(PIO026_DIGIMODE_DIGITAL) /* Select Analog/Digital mode.: Digital mode. */
);
}
About the details clock to CLKOUT, you can configure the register CLKOUTSEL and CLKOUTDIV register, like the following picture:
- CLKIN
Take care, this is not the pin, this is the internal clock that comes from external crystal oscillator through dedicated pins.
Wish it helps you!
Have a great day,
Kerry
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