Dashboard Programming

I was just wondering if anyone knows what the 6 user bytes and the user warning, error and command bytes are for. I’ve looked around and I haven’t been able to figure out what they’re used for. If anyone knows what they’re for, I’d really appreciate the help.

BTW, I’m new to these forums so I hope I’m posting this in the right place.

The 6 user bytes can be set in the program to be fed back to the Operator Interface. The first user byte (default p1_y) can be viewed on the OI by switching it to user mode. I don’t know any of the details about the error, or warning, or USER CMD bytes.

Welcome to the forums! :slight_smile: Programming is a good place to put a question like this. It also could be put in the Control System Section.

Thanks for the information! I’ll be sure to go over the FRC source code to make sure to find out what exactly is being sent back in those user bytes.

The USER_BYTEs are viewable via the IFI provided dashboard program on a PC connected to the OI via the dashboard port.

I was going to put this in a new thread, but is discussed a little here. Could someone explain how to use the 6 user bytes please(without messing up my pwm outputs)?

I believe the user bytes are called by 'user_bytex" where x is 1 to 6. So you use it the same as a pwm, or you can break it up into it’s bits, but I’m not sure how to do that off the top of my head, and I don’t have the program loaded up anywhere to double check quickly.

For example, if you want a user byte to show the analog pressure switch, something like this would work…

user_byte1 = analog_pressure;

Of course, the analog inputs are 10 bits, instead of 8 bits, so that screws you up, and I haven’t found a good way to get around that yet… :-\

Here’s an example from our user_routines.c
(make sure you have ifi_aliases.h included)

[edit]Each of these User_Byte1,2,3,4,5,6 are defined in ifi_aliases.h and are all “unsigned char”

User_Byte1 = LeftAmps; 
User_Byte2 = RightAmps;
/* Display the gyro heading byte3 if its negative, byte4 if its positive */
igyrovalue = Gyro_Degrees();
if (igyrovalue > 0)
User_Byte3 = 0; 
User_Byte4 = (char) igyrovalue;
User_Byte3 = (char) -igyrovalue; 
User_Byte4 = 0;
[size=2]User_Byte5 = 99; // Displays "99" on the dashboard program
User_Byte6 = 254; // No particular reason


Also, user bytes 1 & 2 need “.allbits” They’re special. Check ifi_default.h

Thanks! I’ll probably be using this to write some debug code.