About Ouput Compare Insert dead time .

[Jerry Yung]

Now , I generate below waveform. Every thing is OK except for red arrow , it indicate a deadtime.but it's longer than other deadtime , in fact , This dead time is twice as large as the other dead time .

divide into three stage :

1�?First Stage , TIM register content

CCMR1.OC2M = 1 ;

CCMR1.OC1M = 1;

CCER.CC1NE = 1;

CCER.CC2NE = 1;

CCER.CC1NP = 1;

CCER.CC2NP = 1;

BDTR.OSSR = 1;

BDTR.MOE = 1;

2�?Second Stage

CCMR1.OC1M = 2;

CCER.CC1E = 1;

CCER.CC1NE = 1;

CCER.CC1NP = 1;

BDTR.OSSR = 1;

BDTR.MOE = 1;

3�?Third Stage

CCMR1.OC2M = 2;

CCER.CC2E = 1;

CCER.CC2NE = 1;

CCER.CC2NP = 1;

BDTR.OSSR = 1;

BDTR.MOE = 1;

when every stage completed , clear all resgister,​ then ,re-config TIM , re-start .

so. I don't know why the second stage dead time have problem .​

[waclawek.jan]

This again as in your previous post, may be an artefact from the way how you set up things. Hard to tell without seeing the actual code, and also I don't have time to analyze this thoroughly.

Try to single-step through the code clearing/setting the timer registers (while having the timer stopped, maybe through the DBGMCU freeze registers) and observe the impact of each register change on the outputs.

JW

[Jerry Yung]

yes , I have solved !

thanks for your help all the time .

[Jerry Yung · Accepted solution]

config CCER before BDTR ​can be solved