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Forum Index : Microcontroller and PC projects : ssd1306
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stanleyella Guru  Joined: 25/06/2022 Location: United KingdomPosts: 2681 |
> option list OPTION SYSTEM I2C GP8,GP9 OPTION LCDPANEL SSD1306I2C, LANDSCAPE > > print mm.devices,mm.ver 0 5.0704 > It was a faulty ssd1306 it seems. I did try all suggestions but mik's no pullup and run ssd from 3.3V worked. If he was fed up think what I felt like... get another hobby stan :)  |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2681 |
Sorry I shared flogging a dead horse. Both displays were working or I would have binned it. Maybe they are like batteries. It has taught me not to assume things and given me more confidence to try other i2c devices. I can hear the forum say arghhh no! Thanks for help with the display guys. |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8304 |
Glad it's working. :) One of the problems you can get is cheap breadboards. I've learned from experience that once a Pico is plugged in don't be tempted to take it out to use the board for something else. The pins sometimes stretch the cheap and nasty breadboard connectors enough to prevent them closing onto thin wires in the future - and you can't tell it's happened. Another problem can be bad crimps on the Dupont connector leads. Impossible to spot sometimes. A test meter (or continuity tester of some sort) is your friend here. I like these little displays. Cheap enough to build into something just as a debugging aid so that you don't have to plug a laptop or something in as a console. More flexible than a few LEDs and less pins. :) Edited 2022-08-29 01:55 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3481 |
Glad you got it working. You left the "$" off of mm.devices$, otherwise it would have given you the name of the device--"RP2040 PicoMite" for the non-VGA picomite, "PicoMiteVGA" for the VGA version of the firmware. Early on, this would have provided the clue that you were not using the appropriate firmware for the I2C display. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2681 |
I agree and now will take nothing for granted. I was always sceptical about electrolytic caps and always measured their esr.. they are like batteries in that they fail. There used to be alternatives to perforated strip board/veroboard, had pads, do not see that now. Breadboard is quick but not electrically sound. I test the jumper leads now! The display is neat. How does it work? I made line code on picaxe with ssd1306 but gcb uses a 1k buffer so some pics not enough ram. How does mmbasic use it please? If that is off thread please ignore. |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2681 |
> print mm.device$,mm.ver PicoMite 5.0704 ? is print teraterm is still new to me but learning. It is not optional. Everyone else seems happy using it. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8304 |
You can get perf board with individual pads for each hole very easily on ebay. You can link the pads with fine wire or solder blobs. You used to be able to get it with short strips of 3 holes, but I've not seen that for ages - and it was a pig to work with. You can get perf board with the same strips as breadboards now, in the same sizes. I've not used them myself. Tera Term is just a terminal. It sends characters that you type and displays what comes back. It sets up what happens when you press the Enter key (CR, LF or both). It also does a similar thing to get the display right when one or more of those characters is returned. It's not interested in the programming or editing process at all, it's just a "pipe" for characters. Edited 2022-08-29 03:03 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2681 |
thank you phil... on a working display I got > RUN System I2C Address Scanner 0 1 2 3 4 5 6 7 8 9 A B C D E F 00: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 01: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 02: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 03: -- -- -- -- -- -- -- -- -- -- -- -- 3C -- -- -- 04: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 05: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 06: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 07: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- PicoMite 5.0704 > Nice one. Nothing works on a duff display. |
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