Kendryte K210 PWM analog clock signal and precautions

 The 27Mhz code is implemented as follows:

static handle_t pwm1;

uint8_t 74Mhz_clock(void)
{
    pwm1 = io_open("/dev/pwm1");
    pwm_set_frequency(pwm1, 26000000); 
    pwm_set_active_duty_cycle_percentage(pwm1, 0, 0.5); 
    pwm_set_enable(pwm1, 0, true);
    return 0;
}

Note in project_cfg.h, if it is written according to my above, then the corresponding pin should be set to: FUNC_TIMER1_TOGGLE1

If pwm0 is turned on, and the channel is selected as 0, then the corresponding pin is set to: FUNC_TIMER0_TOGGLE1

Because the document is written in the cloud, and there is no introduction in this area, here is the record