Connecting current shunt to FRDM33772BSPIEVBUG

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Connecting current shunt to FRDM33772BSPIEVBUG

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Contributor II

Hi @mariuslucianand,

I tried connecting current shunt(750A-50mV) to M33772B board at pin 31(P) and pin 32(N) but was unable t read current values. I am using MBDT and have configured shunt value in Config block. 

Could you please help with the connection or let me know if I have done something wrong?

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NXP Employee
NXP Employee

Hello @rparveez ,

According to the schematics, you have to connect the load between 31(P) and 31(N) and you have to connect the load between pin 32 and pin 2  to have the current that flows through the circuit over that resistor. Do you measure the right value using the multimeter?

If so, I would try getting the raw register that the MC33772B using the read register block, exactly the register that stores that measured value of the shut register. You can find an example here:

https://community.nxp.com/t5/NXP-Model-Based-Design-Tools/How-to-use-your-own-C-code-in-our-Toolbox-...

Hope this helps,

Marius 

 

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