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Forum Index : Microcontroller and PC projects : Displays in use, which Micromite?
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 10197 |
I'm just about to do a bit of work on the Henning Karlson fonts but want to check which displays are actually in use out there so I target the work. Please let me know controller type and interface (SPI or parallel) Is anyone using 44-pin Micromites? I'm assuming the preferred displays for the 64 and 100-pin parts will use the 16-bit parallel interface - this is how we get the most speed and the code is most compact. I'm hoping Grogster will layout a board which will take the 64-pin chip (or 100) and has the 40-pin header which is standard for the larger displays  .
I've just ordered this one In terms of using the fonts, displays which support hardware screen rotation are much the easiest. Basically I construct an array of colour codes and set the display's sub-window to the size of the font (e.g. 32x50 for the 7-segment font). Then I can write the entire array in one go with no cursor positioning and it will fill the sub-window top-left to bottom right. With hardware screen rotation, there is nothing else to do as the display "window" takes care of the mapping if we want to rotate the font. I haven't done the code to rotate the data as it clocks out of the array for the other displays types - this is definitely something I would prefer to avoid  .
Controllers like the ILI9341 have the rotate facility. The SSD1289, for example, doesn't. The way to check any display you are using is simple - if the Basic code in the "setrot" subroutine sends data to display registers then the display supports hardware rotation. I'm not intending to allow resizing of the HK fonts, the idea is that you load one or more fonts in your program to suit the application. Resizing them would be really tricky to code. Please either post your usage, ideas, comments, etc. in this thread or PM me if you prefer. Thanks Peter |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2932 |
Hi Peter, I am using the 44-pin MicroMite BUT if it is an issue to create code for it then I am happy to stick with the new 64pin and/or the 100pin. I have also used the 28-pin and NanoMite to drive the various TFTs & OLEDs. I personally like to use the OLED you wrote code for (SD1351 controller) - I notice it offers 8bit parallel as opposed to 16-bit. One question, do you think the MX470 has enough power/speed to drive a TFT on a standard RGB interface (common on 5"+ TFTs? 7" are common at 800x480 . I assume the 5" TFT you link to is not the standard RGB interface but maybe I'm wrong? WW |
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Zonker Guru Joined: 18/08/2012 Location: United StatesPosts: 767 |
I agree Matherp... I would love to design a PCB for these things, but it seems like to many things are undecided yet... I like the 5" unit you ordered. I have the 5" RGB units that I used for the UBW32 based TFTMaximite prototype I built awhile back... they seemed to work ok. I could never get ahold of any "production" TFTmm's and I think there was a thread that talked about fixing the video circuits to make the displays function better... I hope this design is not dead... If we could gather all the data and come up with a new design, I for sure would be interested in getting the 5" display mounted to a PCB of our making... Thanks again for all your hard work and time spent trying to make the MM project more awesome... (nice)... |
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halldave Senior Member  Joined: 04/05/2014 Location: AustraliaPosts: 121 |
Peter, There are these 7" displays seems to be just extra screen with same controller as 5" http://pages.ebay.com/link/?nav=item.view&alt=web&id=1908692 21518 http://pages.ebay.com/link/?nav=item.view&alt=web&id=1908692 21518 Would they work? Only a couple of parts away from a micromite tablet Regards David |
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bigmik Guru Joined: 20/06/2011 Location: AustraliaPosts: 2949 |
Now, Those are nice displays. As mentioned earlier I am interested in doing a back-pack type board for one of these displays but at the moment I am holding off to see what comes of the 470 chip (and which pinout 64 or 100) and which display module is the `chosen one' I dont want a situation of designing a PCB and having the direction changed. I really think a back-pack 'mite on LCD is a bl**dy fantastic idea. Regards, Mick Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<< |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9586 |
Your wish is my command.....
I think we all agree at this point, that we needed the Skinny PCB for Beta testing purposes first before we get too carried away, but in the event that everything checks out with the beta testing, I would be happy to whip up a back-pack PCB for the parallel displays. If the parallel interface pin-out is standard as stated, then it would be an ideal board, as you could then plug it directly into several different parallel displays - you choose. Smoke makes things work. When the smoke gets out, it stops! |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6268 |
Most of my present uses are for small displays. I have a few of the 1.8in ones using the S6D02A1 chip (but the next batch will probably be different!) I also have some 2.4in with the ILI9341 and touch on the way. Most of my micromites are 28 pin but there are some places where I need the extra pins of the 44. For large screen use, I still have the colour maximite and 7in VGA with touch. I think I have enough projects on the list to keep me going for a few years but who knows what will come up next week? Jim VK7JH MMedit |
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