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by **MitchJS** » Wed Jan 04, 2006 8:10 pm

Here is the extended button status command:

OLD ipods wont do past index0
3G needs newest firmware.
if you got a 3G or less... id buy a new one

Code: Select all: Button Name Byte Index Button Bitmask ---------------------------------------------------- Play/Pause 0x0 0x01 Volume Up 0x0 0x02 Volume Down 0x0 0x04 Next Track 0x0 0x08 Previous Track 0x0 0x10 Next Album 0x0 0x20 Previous Album 0x0 0x40 Stop 0x0 0x80 Play/Resume 0x1 0x01 Pause 0x1 0x02 Mute toggle 0x1 0x04 Next Chapter 0x1 0x08 Previous Chapter 0x1 0x10 Next Playlist 0x1 0x20 Previous Playlist 0x1 0x40 Shuffle setting advance 0x1 0x80 Repeat setting advance 0x2 0x01 Power On 0x2 0x02 Power Off 0x2 0x04 Backlight for 30 seconds 0x2 0x08 Begin FF 0x2 0x10 Begin REW 0x2 0x20 Menu 0x2 0x40 Select 0x2 0x80 Up Arrow 0x3 0x01 Down Arrow 0x3 0x02

here is some examples:

Code: Select all: PLAY: TO iPOD: FF 55 04 02 00 00 01 F9 FF = Sync byte (autobaud) 55 = Header 04 = Length 02 = Lingo 02 00 = Button Status 00 01 (index0, index1 contains 01) (play as in table) F9 checksum

Code: Select all: Scroll down (menu function): TO iPOD: FF 55 06 02 00 00 00 00 02 F6 FF = Sync byte (autobaud) 55 = Header 04 = Length 02 = Lingo 02 00 = Button Status 00 00 00 02 (index0, index1, index2, index3 contains 02) (Down Arrow as in table) F6 checksum

Got it?

dont forget to send the button up status!!!

Code: Select all: TO iPOD: FF 55 03 02 00 00 FB

mitch

by **ridax** » Sun Jan 08, 2006 7:39 am

MitchJS wrote:OLD ipods wont do past index0
3G needs newest firmware.

I can't get the index 1-3 commands to work on the 3rd gen iPod with firmware 2.3. Are you sure it should work with 3rd gen iPods? What does the documentation say on this? Does it specifically say that it will work with firmware 2.3 or does it say it will not work with firmware up to 2.2 without mentioning anything about newer firmwares?

by **MitchJS** » Sun Jan 08, 2006 4:04 pm

first, get a newer ipod

looks like 3g is SOL on the button commands:

id habe to make a table

but only buttons 1-4 are avail on 3G no matter what firmware

4G is where it starts...

sorry for any confusion, since its a confusion doc

anyway, i never liked the ipod till the clickwheel... so dump 3g and below
:roll:

mitch

by **ridax** » Sun Jan 08, 2006 4:44 pm

MitchJS wrote:first, get a newer ipod
anyway, i never liked the ipod till the clickwheel... so dump 3g and below

I already have a iPod nano and iPod video. But I have the 3rd gen iPod as well for compatibility testing.

by **ridax** » Wed Jan 11, 2006 4:29 am

Can't get PowerOff to work on iPod nano, but it works on iPod video.

by **MitchJS** » Wed Jan 11, 2006 8:27 am

did i tell you, you have too many IPODS

ridax, would you like my program, IPOD Explorer?

will make life easier to test and build your reports

mitch

by **bigcookie** » Wed Jan 11, 2006 1:29 pm

Hi MitchJS,

if there wouldnt be much difficulty, I am interested in that program. Unfortunately I am a bad programmer concerning serial interfaces, I am more into PIC programming ;-). Still working on my iPod2T+A-remotecontrol adapter, but also for the other series of hifi stereo systems from T+A. To test my iPod (3gen) concerning the different comment sets, I would appreciate very much, using the application...

Anyway, if you get the iPod cables for a reasonable price, I might be interested in getting some. Unfortunately I wont need a huge number ;-)... Anyway thanks for your work and the final contribution on ipodlinux...

Email would be andre(at)fantasymail(dot)de, just in case, you would get into contact...

Thanks for your work,

Andre

by **ridax** » Thu Jan 12, 2006 1:58 pm

MitchJS wrote:did i tell you, you have too many IPODS
ridax, would you like my program, IPOD Explorer?
will make life easier to test and build your reports

Too many iPods??? Is it possible?

Anyhow, I found out that there was a annoying backslash missing in the source code, thus the PowerOff button up command wasn't sent correctly. The iPod video worked anyhow (powered off) while the iPod nano didn't power off, but instead entirely forgot to turn off the backlight. After adding the missing backslash in the source, everything is working with both video and nano.

I am programming a Microchip PIC 16F88 and have no interface between iPod and PC to run your iPod explorer. But I may build one to experiment later. But thanks very much for the offer!

by **bigcookie** » Fri Jan 13, 2006 4:08 am

Hi Ridax,

how is your project going forward? Did you find any way of getting the controls enabled in AiR-mode again? And could you successfully detect the iPods generation by software? If yes, some hints would be nice. Since I only develop on a 3G, I cannot try...

Greetings,

Andre

by **ridax** » Fri Jan 13, 2006 4:26 am

bigcookie wrote:Hi Ridax,

how is your project going forward? Did you find any way of getting the controls enabled in AiR-mode again? And could you successfully detect the iPods generation by software? If yes, some hints would be nice. Since I only develop on a 3G, I cannot try...

I told you before how I enabled the controls again when in AiR mode. Other than that I don't know. I am not working with AiR mode anymore (except when a 3G iPod is used) but only with the simple remote interface, as I feel it is much nicer anyhow. I am not detecting iPod generation.

by **bigcookie** » Sat Jan 14, 2006 10:15 am

Hi ridax,

sorry for that, I thought you might have figured out something else... That's somehow a pitty, but since the newer iPods support some more commands, it's probably not needed anymore... Unforunately I have a third gen, and I would like to get both enabled (further command set and manual control). Anyway, probably I stick to the simple remote protocol...

thanks again

by **ripper** » Fri Apr 14, 2006 12:33 pm

Total newbie question but I am confused by the checksum calculation

For play you send

FF 55 04 02 00 00 01 F9

For Volume up you send

FF 55 04 02 00 00 02 ?

How do you calculate the checksum where the question mark is?

I assumed you add the 7 preceding bytes before the checksum
and then add 7 for the byte count and then AND that with 7F to get the checksum?

I've calculated them before using a method like I describe..if this is wrong can someone tell me the right way to calculate the correct checksum using the windows scientific calculator...greatly appreciated!

by **MitchJS** » Fri Apr 14, 2006 2:06 pm

add all the bytes up of the sequence, without sync and header bytes

also volume up = FF 55 03 02 00 02 CK
(3 = len, 2 = lingo2, 00 = cmd, 2 = vol+ at index 0)

remember

FF = sync byte
55 = header byte

so

03 + 02 + 00 + 02 = 07

checksum = 0x0100 - 07
checksum = 0xf9

so

03 02 00 02 F9

as in ipod explorer: TO iPOD: FF 55 03 02 00 02 F9

dont forget keyup when done ramping...

mitch