JP1 Remotes

[just4fn]

When and what are the advanced functions used in IR.exe ?

1. Initialized to $00
2. Initialized to %FF
3. Enable raw download
4. Enable unsafe upload.
5. Clear upper memory
6. Forced leared timings
7. Disable device offset
8. Disable decode IR

Thanks for the info!
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thanks, just4fn

[Mark Pierson]

[The Robman]

These functions were mostly added for me and are of little interest or use for most JP1 users. But none the less, here's a summary of what they do...

2. Initialize to $FF
When you're trying to create an RDF for a new remote, it's useful to see the memory without any "junk" in there, so we use this function to initialize the memory in the remote to all $FF bytes, then we do a 981 reset on it and download the memory. We refer to this download as a "virgin" image.

1. Initialize to $00
Same as above, except we use this version for remotes that use $FF as their "end of section" marker. Most remotes use $00 as the end-marker..

3. Enable raw download
This toggle switch enables a new button in the IR GUI which lets you download from the remote bypassing the RDF. We would typically use this when we're debugging an RDF as it eliminates the possibility that the RDF changed the data.

4. Enable unsafe upload
This toggle switch enables a new button in the IR GUI which lets you load a file into the remote bypassing all the normal data validation checks. I use this option a lot when I load data into remotes where I soldered in the EEPROM chip. As the chip will not have any data on it, I would normally get the "signature different..." message.

5. Clear upper memory
This option removes data in the upgrade section of the memory that's not being used.

6. Forced learned timings
Normally you don't see the learned timings in IR when you look at learned signals, you just see the protocol, EFC, OBC, etc info. We disabled the learned timings because they were scary for newbies. This option lets you turn them back on again.

7. Disable device offset
Some remotes that are not obviously UEI remotes, use a "device offset" to disguise the fact that they are in fact UEI remotes. The theory being that people get used to UEI setup codes (eg, TV/0156 = Toshiba TV, VCR/1162 = Panasonic VCR, etc) so if the user manuals for these "secret" remotes were to include such codes, people would instantly know that they are UEI remotes. Therefore, UEI added an offset to these remotes. For example, all the setup codes in the RCA RCU810 are offset by 17, so those two codes that I mentioned earlier would show up as TV/0173 = Toshiba TV, VCR/1179 = Panasonic VCR.

IR is aware of any device offsets present in remotes, so when you download from the remote you will see the setup codes in their offset format. This option lets you view them as they really are without the offset.

8. Disable DecodeIR
When IR.exe was originally written, it included it's own decode routine for learned signals, but eventually John Fine wrote DecodeIR, so we changed IR to use this instead. This option lets you make IR.exe use it's own decode routine. You would only do this if you suspected that DecodeIR was causing problems.

[edit] Mark posted his reply while I was typing mine.
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Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!

[Mark Pierson]

[just4fn]

Thanks, that is helpful even though I will not use them. Would I ever need to clear the upper memory? If so what and when is the need?
_________________
thanks, just4fn

[The Robman]

[just4fn]

Thanks for your time and effort!
_________________
thanks, just4fn