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Altera_Forum
Honored Contributor
Honored ContributorMax5 Power Monitor
Hello, I'm working with the Arria starter kit. To start with, I've already seen this: http://www.alterawiki.com/wiki/how_to_read_power_monitor_value_in_system_console but I still have so...
Altera_ForumHonored Contributor
Honored ContributorHi Jonah,
Yes, very likely it is "backwards" (i.e., the least significant byte is printed first). I am sort of reverse engineering Power Monitor's behavior to automate some measurements on a Cyclone IV Development Kit. Here are some observations, which may or not be true: - The values read seem to the the least significant bits of a 24-bit ADC; in the formulas, some have advised dividing the reference voltage by 23 and multiplying by the value read. - You can read the resistance values by looking at the components on the PCB, or by looking and the schematics or datasheets for your board. - I believe all rails use the same reference voltage, because it is a single configuration for the whole ADC. In my board, it seems to be 5.37 or 5.0V. - The number changing from 1 to 2 in your question# 3 is the value to be written in the instruction register. The second value should be a timeout in microseconds. Hope this helps. Ricardo
