LPC804(QFN33) PWM problem

thinkking1985 — Wed, 16 Jun 2021 09:05:55 GMT

Hi sir

I use LPC804's P0.18 to be PWM output. and use the SDK in the test, it is found that when the program is executed( base->PWMC |= (1UL << (uint32_t)matchChannel);), it will output high level.

Very strange phenomenon, this high level is not acceptable.

tks a lot for your support.

Remark:

1:SDK Version:SDK_2.9.0_LPCXpresso804

2:Project:SDK_2.9.0_LPCXpresso804\boards\lpcxpresso804\driver_examples\ctimer\simple_pwm

3:base->PWMC |= (1UL << (uint32_t)matchChannel) in status_t CTIMER_SetupPwmPeriod(CTIMER_Type *base,
const ctimer_match_t pwmPeriodChannel,
ctimer_match_t matchChannel,
uint32_t pwmPeriod,
uint32_t pulsePeriod,
bool enableInt).

Re: LPC804(QFN33) PWM problem

Omar_Anguiano — Thu, 17 Jun 2021 22:23:39 GMT

Hello

Hope you´re well. Unfortunately, this is expected behavior as the User Manual suggests:

I apologize for the inconvenience this may cause you, if you have further questions do not hesitate to ask me.
Best regards,
Omar

topic LPC804(QFN33) PWM problem in LPC Microcontrollers

LPC804(QFN33) PWM problem

Re: LPC804(QFN33) PWM problem