Espruino JavaScript
Pico + OLED + Temperature #1183
Replies: 12 comments
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Posted at 2015-06-08 by @gfwilliams Wow, looks great! Thanks for posting up... Is that one of the oleds with the yellow band at the top? I've never actually seen one in use. |
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Posted at 2015-06-08 by DrAzzy Me neither - and I own three of the damned things :-( |
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Posted at 2015-06-08 by @gfwilliams :( You having problems using them? I've recently fixed a bug in the I2C version of the library that caused random dots to appear - it was a regression from when I added the SPI capability. It might have been causing you problems. |
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Posted at 2015-06-08 by @gfwilliams Also, nice use of the bitmap logo. I was hoping people would use it like that but hadn't seen anything until now. |
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Posted at 2015-06-08 by DrAzzy Last time I tried was a while before you added SPI support, when we were talking about how you need to short two pins together to make them have a prayer of working on I2C, and that made it stop giving I2C timeouts, but the screen remained blank. I haven't had a chance to come back to it since then. |
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Posted at 2015-06-09 by Jorgen Thx ;) @gordon I had these random pixels only with the arduino library connected on my Teensy3.1 My example just uses the VDD/GND of pico or the pins A5/A7 setting to high/low to give 3.3V |
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Posted at 2015-06-09 by JackJamesHoward @jorgen what do I have to search for to find one those displays? |
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Posted at 2015-06-09 by @gfwilliams
Ahh, give it a go now - I changed the initialisation code - there's a lot of extra stuff that could be set up, and some things to do with the charge pump for displays that didn't have a built in power supply. The Arduino library had what seemed to be some much more general purpose initialisation code. @jackjameshoward it's the SSD1306 - see here. There are a few links on that page to EmbeddedAdventures and AdaFruit, but you can find them other places too. You want the 128x64 pixel variant. |
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Posted at 2015-06-09 by Jorgen @jackjameshoward you can also find on my GitHub README some links to the cheap china/aliexpress displays. @gordon Do you know, what happend on startup. I've noticed that the display is black on startup. I have to connect it by the WebIDE to see something on the display. Is there something wrong with my initialisation of the SPI? |
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Posted at 2015-06-09 by @gfwilliams
No, it's an issue with the current version of the firmware. If you power it from a USB power supply then it should work first time? It's fixed in the USB HID firmware, but there's still a bit of work to do before I do a full release of that. The issue is that when the Pico is connected to a PC, there is a USB connection made, but the PC is not reading any information the Pico transmits - so the pico just 'stalls', waiting for the characters to be read. |
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Posted at 2015-06-09 by Jorgen
Yes, if I connected to USB Powerbank it lights up, there are still some strange issues - could be something with my code - I have to check again. |
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Posted at 2015-06-09 by @gfwilliams Yeah... If you get the firmware from here it shouldn't do that unless you print a lot of text - those changes will work their way to a release at some point in the future, but those were big changes so it'll take a while before I'm happy :) |
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Posted at 2015-06-08 by Jorgen
Just create my first short example with the awesome Pico board.
https://github.com/Jorgen-VikingGod/Espruino-Pico-Examples/tree/master/OLED
I will add more examples on GitHub, if my ESP8266-ESP12 shim is arriving from OSHPark:
https://github.com/Jorgen-VikingGod/Espruino-Pico-Examples
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