Chief Delphi - Dashboard: how to calculate battery voltages?

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Dashboard: how to calculate battery voltages?

Hello,

I have been hacking on a small VB app to connect to the dashboard port during matches to record every packet into a CSV file for analysis in Excel. It's a handy little tool, but I'm looking to extend its functionality.

For now, I can't figure out how to calculate, given the 1 byte battery voltage, the actual number of volts. Is there some magic formula I must run the byte through to get the proper voltage? :confused:

Thanks.

BTW, I may release this app once it's a bit better. Right now it's just a mash of code I wrote last-minute...I really needed it to figure out why our auto-correction in auton wasn't working.

JBot

Re: Dashboard: how to calculate battery voltages?

I have no way to test if this helps you, but I found this in ifi_aliases.h It leads me to believe that you should scale the readings you get back by the same amount as IFI does in this code.

Code:

/*

 *-----------------------------------------------------------------------------------------------------

 *---------- Aliases for Battery Voltage bytes --------------------------------------------------------

 *-----------------------------------------------------------------------------------------------------

 * Formula to calculate voltage in volts: 

 *     current_voltage = battery_voltage * 0.038 + 0.05; 

 */



#define battery_voltage     rxdata.rc_main_batt*15.64/256

#define backup_voltage      rxdata.rc_backup_batt*15.64/256