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Iriver H120: Volume knob on remote skipping directories

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Multiplex:
It's really only ROckbox that can be tweaked (well I know folks have done stuff like changing images in the original FW but this is a forum for rockbox)

If you can do the test I mentioned we'll see what values your remote is reporting - we might be able to say if it is HW and not fixable or if there is something that can be done.

To exit the test you need to stop button on the main unit.

Mmmm:
Here are the ranges of ADC values for each button on the remote as used by Rockbox:

Stop:        between 00 and 0c
voldown:   between 0c and 25
mode:       between 25 and 3f
volup:        between 3f and 5a
bitrate:      between 5a and 73
rec:           between  73 and 8c
source:      between 8c and a8
ff:              between a8 and c5
menu:        between c5 and df
rew:          between df and f5
no button: larger than f5

So as you can see, volup and bitrate are right next to each other so it is possible that the boundary between these two needs increasing a little bit as it seems some remotes are giving slightly higher readings when pressing the volup button.

I take it that this doesn't happen with voldown and source - is that correct? - as these are far apart and if it does then we have a far more complicated problem (probably hardware).

So if your unit has this behaviour, see if you can get a reading higher than 5a when repeatedly pressing the volup button on the remote and then post it here.

I don't know how these values were originally obtained, whether it was a datasheet or some amazing button value getting gadget... but if it was a datasheet it's possible there was a small typo on it and it should read 5b or something....

StigVig:
Ok, I've been looking at the I/O values and this is what I read:

for the vol-button I currently get a stable 4C for up, and 18 for down. Pressing it gives me 33.

However, these values do change over time (which I guess is related to the dir-skipping thing), but while testing it today, that is what I got. I will look at those values from time to time and see if they change

Mmmm:

--- Quote from: StigVig on November 12, 2006, 05:54:25 PM ---Ok, I've been looking at the I/O values and this is what I read:

for the vol-button I currently get a stable 4C for up, and 18 for down. Pressing it gives me 33.
--- End quote ---
Do you get this problem with voldown too or is it exclusively volup?


--- Quote ---However, these values do change over time (which I guess is related to the dir-skipping thing), but while testing it today, that is what I got. I will look at those values from time to time and see if they change

--- End quote ---
How do you know they change over time?

Multiplex:
The values you're reporting are exactly what I got on my H120 + Remote (though it is rarely used) - that makes the reason for you problem less obvious and less likely to be a quck and easy fix.

Like Mmmm I'd be very surprised if the values change over time (well presumably battery charge) - the reference voltage for the ADC and the resistor chain really should be from a regulated source in the machine design ... temperature should not make that much difference so we're left with a poor connection or a cable with varying resistance I think.

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