Hi all,
I'd like to generate an internal clock from the KL03 and output the signal through a GPIO pin. Specifically I need a clock between 6 and 12MHz, which I'd like to use to drive an FPGA. I tried with the PWM modules, but it seems I can't go above 4MHz, and I'm not even sure this is the best approach. Is there a way to output directly to a pin one of the internal KL03 clocks?
Below is the code I'm currently using for the PWM approach that gives 4MHz output on PB11.
PWM_INTERRUPT_SETUP pwm_setup;
pwm_setup.int_type = PWM_INTERRUPT;
pwm_setup.pwm_mode = (PWM_SYS_CLK | PWM_PRESCALER_1); // clock PWM timer from the IRC48M clock with /1 pre-scaler
pwm_setup.int_handler = 0; // no user interrupt call-back or DMA on PWM cycle
pwm_setup.pwm_frequency = PWM_TIMER_US_DELAY(TIMER_FREQUENCY_VALUE(500000), 8);
pwm_setup.pwm_value = _PWM_PERCENT(50, pwm_setup.pwm_frequency); // 50% PWM (high/low)
pwm_setup.pwm_reference = (_TIMER_0 | 0); // timer module 0, channel 0
fnConfigureInterrupt((void *)&pwm_setup); // enter configuration
Thank you,
Enrico