12f675_fuse_about_to_blow!

[LEDave]

Ok.....Mmm...,

Now we want to control where in the EEPROM data is written to as we will be storing and retrieving multiple pieces of data.

Well for this I'm thinking (although I could be wrong here):

WRITE 5,B0 ' Send value in B0 to EEPROM location 5

So we need:

1/ Total parts run

2/ Total parts run before M/C stops for maintenance

3/ How many times M/C shuts down (scheduled + un_scheduled)

4/ The average amount of parts run between each shut down (scheduled + un_scheduled)

I think I've read that right?

Dave

[mackrackit]

WRITE 5,B0 ' Send value in B0 to EEPROM location 5

Yup

1/ Total parts run

2/ Total parts run before M/C stops for maintenance For each run, need multiple address here too.

3/ How many times M/C shuts down (scheduled + un_scheduled)

4/ The average amount of parts run between each shut down (scheduled + un_scheduled)

Remember two address locations for WORD size variables.
Hopefully the machine will run long enough to need a WORD VARs for parts run between shut downs, and if all goes well the machine will not shut down often so a BYTE size VAR should work for "times shut down".

[LEDave]

I'm on it, tricky in parts but I'm on it

How many EEPROM locations are there on a PIC16F684?

As in:

EEPROM location 5

Dave

[mackrackit]

I think the 684 only has 256, if I remember correctly.

[LEDave]

Is that sequential 0-255?

Srub that, it's got to be I'm thinking.

See you tomorrow.

Dave

[LEDave]

Hi mackrackit,

I'm busy working on the latest 'mission'. I'll stick at it and only ask a question when I'm stuck and have given it a good go to figure it out myself.

I do have one quick question though:

Can you add or subtract EEPROM memory location values (numbers written to an EEPROM address)? Or do you just give the stored WORD's a name and then subtract the two, something like: Parts_Run = Total - First_Parts_run (if this make sense).

Dave

[mackrackit]

While the value is in the EEPROM you can not go anything with it. You have to read the value into a variable, do something with it and write it back into the EEPROM.

I think that is what you are asking...