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Hi,
Initially, we tried with Lauchpad157 & Drv8353 board interface working fine without issue.
Now, Working on a custom board with TMS320F2800157 MCU.
The same software(Lauchpad157 & Drv8353 board) when adapted to a custom board faces an issue while trying with the DMC_LEVEL_1 build.
Getting faults like Current offset (Hall effect sensor used how to calibrate)
The custom board contains TMS320F280157 MCU and a Separate Power board(FET Drivers) . Used DRV8353 macros but removed DRV8353-related Stuff.
Current offsets reading in expression windows are not as per the UMC document. because we are using a Hall effect sensor, not a shunt resistor?
how to calibrate the current offset for the Hall effect sensor?
Any help is much appreciated. Thanks in Advance.
Hi,
Could you please elaborate on how to change or adapt 5v for 3.3v and what values have to be given to ADC half full-scale range?
Check your ACS712 device datasheet. It has info on the output voltage vs. sensed current. It also depends on the Current Sensing Range, IP (A), of your device, see below as an example from the Datasheet. The output voltage can exceed the C2000 ADC voltage range and damage the device in this case (IP = 20 A).
Do you have an Op-Amp or any circuitry to scale the output of the ACS712 device before the signal enters the C2000 ADC?
Best,
Kevin
yes we are using op-amp circuit to convert 5v to 3v while connect to c2000 device 
