【开源】COF屏开发PWM实例

cuijia

fyk 发表于 2024-4-30 15:11
大神 我想在while（1）中 改变PWM的精度就是频率嘛 我只要修改void pwm_init()这个函数的PWM_ACCURACY这个 ...

Write_Dgus(0x87,PWM_ACCURACY);//100khz=825.7536MHz/PWM_ACCURACY, 改这个值PWM_ACCURACY就可以改频率了。这个pwm没法中断，不能计数。

daronow

Hello, how can I check if the PWM0 fill (duty cycle) change command has been executed? Which register can I check?

紫狐

The address 0x92 is the address set for the duty cycle。

daronow

紫狐 发表于 2025-7-7 18:47
The address 0x92 is the address set for the duty cycle。

Thank you, however, when I read from register 0x92 (Read_Dgus(0x92);), I always get a value of 0, even though the signal on the pin has a frequency of 2.5 kHz and a duty cycle of 50%. Does this register need to be read in a special way?

紫狐

Sorry for the mistake, this COF screen does not have a register for reading duty cycle.

daronow

紫狐 发表于 2025-7-8 09:07
Sorry for the mistake, this COF screen does not have a register for reading duty cycle.

Do you have any idea how to check whether the pulse width actually changed? I'm having an issue where it doesn't always happen, even though the change was made twice.