About richard239955_stm1_stmicro_com

richard239955_stm1_stmicro_com · 2015-11-04

Posted on November 04, 2015 at 13:25Hello, We're using STM32F207Zx and have a strange problem when using TIM1/8 for PWM. when code include line TIM_OCxPreloadConfig(Tim,TIM_OCPreload_Enable); where x can be any number from 1-4 for TIM1, new duty val...

richard239955_stm1_stmicro_com · 2015-11-05

Posted on November 05, 2015 at 13:43>>When preload is enabled, the ''real'' CCRy is updated upon the UE (update event), which is roughly speaking when >>TIMx_CNT overflows. That can be disabled (using TIMx_CR1.UDIS), or, when TIMx_RCR is non-zero, d...

richard239955_stm1_stmicro_com · 2015-11-04

Posted on November 04, 2015 at 20:59>What does that mean? A write to TIMx_CCRy? No,we use low level code to get minimum delay for the reference output. GPIOC->BSRRL=GPIO_Pin_7; // pin high GPIOC->BSRRH=GPIO_Pin_7; // pin low A small delay <1ms is ex...

richard239955_stm1_stmicro_com · 2015-11-04

Posted on November 04, 2015 at 15:31How do you know that? We toggle another pin when duty is changed and look at that pin and output from i.e. TIM1 on a scope. When we not use preload the two outputs are aligned.

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TIM1 and TIM8 preload behavior

Re: TIM1 and TIM8 preload behavior

Re: TIM1 and TIM8 preload behavior

Re: TIM1 and TIM8 preload behavior