Drive for inexpensive 128x64 OLED displays

…that wall-banging penguin is great…

This and the other I have stolen from the German Pandora Forum supportet via gp2x.de.

My module won’t support your display.

I know now. I have read the aviable technical docs last hours… to many English for my brain but with the additional datasheeds it is clear… no chance with your module

Until I have the knowledge and ability to program a driver, I’m “Six feet under”

Until I have the knowledge and ability to program a driver,

Talking mostly out of my backside here :-) I suspect talking to the display will be the easier part. After all, doesn’t the BCM chip support handling SPI at a reasonably high level?
The difficulty will be in getting it to work within RISC OS. What do you expect to see on the display? In my module, I could pretty much use a little sprite as a frame buffer and convert it on the fly (due to its size). But it will only receive text and drawing specifically directed to it – it will never replace the primary display. The thing with a 320×240 panel….it’s a little small in resolution, but it is feasible to imagine that it could be the primary display. And that’s when the really hard work begins!

Primary Display would be fine. It works with Wheezy but the configuration is a little bit fiddly.
There is very little technical documentation and the source I have not found yet.
For me, no matter, stupidity gives leisure.

Raik (and others):

This is an idea of what I had in mind…

http://www.youtube.com/watch?v=keHfvpEq6UU

The pauses are when the playback fails. My (amazingly hacky) code detects this, kills off the modules, reloads them, and resumes playback from the last saved song position. ;-) It polls status every 20cs. There is no point doing it sooner, it seems to take 15-17cs for the module to initialise. The problem is exacerbated by 320kbps files (128kbps play with fewer or no hiccups). Unfortunately I left 128kbps behind when portable MP3 players started measuring their capacities in G instead of M.
I’m going to stop doing this now, my phone can do it better… T’was mostly an exercise in “can I do this?”. Yeah, I can, but it seems RISC OS has “issues”.

Didn’t somebody (Kevin Bracey?) say a long long time ago that all this freely disabling interrupts here there and everywhere was one day going to bite us on the ass? Well I can see teeth and they ain’t behind a smile…….. [dum-dum dum dum, dum-dum dum dum]

:)

Good work, but the music… not enough electric guitar, drums not enough, not enough Pogo… Sorry, but if you like it, it is ok (please do not fight)

not enough electric guitar, drums not enough, not enough Pogo

When I’m debugging and it is brick-wall time, that’s when I switch the playlist to a Within Temptation selection. Enough guitars and drums now? :-D

[those penguins…hahahahahaha!!!!]

Off-Topic:
Within Temptation is a beginning… not sure how it ends, Rammstein ?

While not wanting to derail Rammstein (Heat from the flame throwers on your face pulsing in time to the beat :) ) I think I should point out that RISC OS pico seems an ideal match to this display system.

RISC OS pico seems an ideal match to this display system.

As I said elsewhere, if ROOL want it, they know my email address… though I think they are currently busy with other things :-)

I’m currently writing a StrongHelp manual to accompany the module.

I know…
Each normal or unusual hardware that operates under RISC OS is a step forward.

Not released yet, but the module now extracts pixel data itself provided there is no left/right bit offset. Saves lots of SpriteOp calls to read pixels. Ought to run faster, but there’s a speed you reach when you can’t really tell the difference. Still, it makes me feel better knowing that it does it that way.

I threw together a really hacky bit of code to try to pull the title of the current track from DigitalCD. It’s a rather horrible interface, it’d be much nicer if DigitalCD could issue a wimp message upon something new playing. That’d save a lot of farting around trying to work out what is or is not playing.
Anyway – here’s a screenshot. The playback chokes from time to time due to IIC latency, but since I’m only writing one screenful just after song change, it isn’t too frequent. It means I can push all but the playback buttons out of the way (does DigitalCD do global playback hot keys?).

Picture dropped on imgur, the PC isn’t running…

PS: Station is AnimeNFO, 192kbps streaming MP3.

it’d be much nicer if DigitalCD could issue a wimp message upon something new playing. That’d save a lot of farting around trying to work out what is or is not playing.

Agreed! I played around with the DCDUtils SWIs a while ago for my 20×4 LCD panel. I got it scrolling the name of the current track but only by keep asking what the track was and noting when it changed.

Public holiday here in France. Crappy weather. Was bored. So I had some time to kill between “then” and the second Eurovision semi-final.

So…

OLED, 128×64. About right for retro-pong. :-)

http://www.heyrick.co.uk/software/oled/
(it’s down near the bottom; supplied as executable and C source code)

Wanna see it in action?

http://www.youtube.com/watch?v=cts9HlCLzR0

Giggle at how the scrolly-effect makes the picture hiccup as the camera’s auto-stabiliser tries to make sense of what is going on. ;-)

Eurovision semi-final

Impending doom alert. Damn, Saturday too.

Impending doom alert.

Well, the bad news for you may be that the bloke¹ with the beard² and the dress qualified so will show up on Saturday.

Damn, Saturday too.

If only the World Cup was two two hours programmes and a final three and a bit hour programme…

¹ Though everybody refers to this person as ‘she’².

² I get that some guys dress up as girls, either for fun or something more serious. I even get that some guys want to be girls, or think they always should have been… But a guy in a dress with a full beard? No. That ain’t right. There’s diddy-squat feminine about a beard.

If only the World Cup was two two hours programmes and a final three and a bit hour programme…

T20 matches don’t last that long.

Oh, the one where they kick a bigger ball around. Nah, most of that lot should be wearing dresses.

Oh, the one where they kick a bigger ball around. Nah, most of that lot should be wearing dresses.

I think most of them do :-)

it’d be much nicer if DigitalCD could issue a wimp message upon something new playing

Have you asked the author? I found him very helpful when I wanted to control DCD from the MMK Keyboard – that’s where that interface came from.

Well, the bad news for you may be that the bloke with the beard and the dress qualified so will show up on Saturday.

Just seen the news this morning.
The wife remarked that Cupid¹ had won.

Heard some snippets: UK – average, some half decent, winner – also ran. Does anyone vote for the song or is that an old fashioned idea?

¹ Kenny Everett reference

It wasn’t a bad song. Might even have won without the….angle….

I think the UK did better than normal. 17th or something, with a song that was not going to be a winner but was better than many recent entries,

I feel kind of sorry for the Russian twins. Let’s just say there was a LOT of booing. A LOT. I understand why, but it isn’t exactly their fault that their country’s leader is hell-bent on dragging their country back to the Soviet era…

Hi Nemo,

How did you drive the MMK?

How did you drive the MMK?

A heap of modules! A custom PS2 driver to map the additional keys (and rotary encoder) to logical keys. A custom International Module to map extra keys (and dead accents) to keypresses. A custom module to move reset to the MMK’s power/sleep button instead of break (while leaving the wimp watchdog on Break). A custom module to map hundreds of ALT key combinations to new keypresses. And finally a number of modules to implement the ‘media control’ keys.

Depending on the module chosen, the MMK’s media keys could directly drive a CD-ROM (if it supported audio playback), CD-ROM emulation (for drives that didn’t support track jumps for audio playback), or a generic module that controlled system volume and DigitalCD.

This led to Andre adding wimp message &5327E to DigitalCD, so that the keyboard support could find the window handle of its primary controller, so it could send keypresses to it specifically.

There was even a program that showed system volume as an overlay on-screen that popped up whenever it changed, in software or by turning the MMK’s ‘volume knob’. Incidentally, that knob responded to modifiers, so was actually eight logical knobs, IYSWIM.

Ouch,

I think that needs looking at as surely it should be in with the standard keys… How long have MMKs been about?

Or are your modules available some where? :@)

Help please!

My OLED module works by redirecting output to a sprite and then sending a bitmap of that sprite to the OLED.

The problem is, if the user is holding down Ctrl and Shift (as one might if they are about to press C to get Zap to compile), everything freezes.
It is such a long time since I worked with non-Wimp code that I don’t remember how to disable this. And there’s my question – how do I disable unwanted side effects of keypresses in VDU output?

Thanks.