I've been reading up on the various clock configurations, and currently I am trying out a project for fun that uses the UART at 115.2kbps and a PWM channel at 20MHz. I only want to use a 32khz external crystal, connected to EXTAL32. I am using a FRDM-K64F for testing.
I believe I have all of the clock configuration parameters set properly. My main loop sends 0x55 over the UART and that works as expected. However, when I try to start my PWM channel, nothing happens. I'm using it just as I do in other projects (which work), and I basically just call:
FTM_DRV_PwmStart(FSL_FLEXTIMER1, &flexTimer1_ChnConfig0, 1);
I'm using the following FTM configuration:
(all of the other pins are unchecked)
These are the settings I have used in other projects, which do work properly.
I've attached my project, in case anyone has time to import it and take a look. Thank you!
Original Attachment has been moved to: KDS3_crystal_test.zip