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Need Help: Hall signal can not be read by FreeMaster project

Question asked by Susan li on Aug 24, 2017
Latest reply on Aug 25, 2017 by dumitru-daniel.popa

NXP Expert,

I tried to practice motor control course Lecture 5 using the video in link attached, when checking the hall signals by spinning the motor by hand, the hall signals captured by scope are attached below. I can not read the same signals from the FreeMaster project(always 0 shown). Please help trouble shoot. Is the hall signal level correct(<1V), they all so dropped down during some portion of high period. FreeMaster not able to read the hall signal means that the embedded software will not be able to read the signal? if it is correct, that indicating the motor will not spin probably using these hall signals? I wired hall signals to J5-PIN1, 3, 5 of the DEVKIT-MOTORGD.

 

Thank you.

 

Susan Li

 

http://v.youku.com/v_show/id_XMjgxOTk2MzUwMA==.html?spm=a2h3j.8428770.3416059.1

 

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