How does VMX HAL communicate with Raspberry Pi?

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Apr 13, 2021, 3:50:34 PM4/13/21
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How does VMX HAL communicate with Raspberry Pi?
looks like HAL IO Board communicate with RPI in SPI?
Any datasheet about this?

Scott Libert

Apr 13, 2021, 4:31:32 PM4/13/21
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The VMX HAL communicates with the VMX circuit board using the "Auxiliary" SPI channel on the Raspberry Pi and it's 40-pin GPIO connector.  The details of this communication channel are internal, and not provided on any datasheet.  The communication bandwidth of this internal communication channel is more than sufficient to handle the data rates of communication between the VMX HAL and the VMX circuit board.
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