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#ST7789

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pedro 🍉<p>I wrote some ST7789 screen driver Rust code which just takes bytes from memory and flushes them into the screen. It seems to work but somehow the screen turns completely white less than one second after the memory write operation. This used to work fine, so I was wondering if maybe some other driver was interfering with the SPI, but nope, I disabled everything else and it still does that. I wrote a small test program which uses a different library to speak to the ST, and it works just fine. I am probably doing something wrong somewhere, BUT THEN WHY WAS IT WORKING OK BEFORE? I suspect some weird timing issues. Or maybe my driver code is being optimized by the compiler somehow, and things are not being done in the correct order?</p><p>I will probably plug in a logic analyzer tomorrow, but if anyone has any tips on how to debug it...</p><p><a href="https://fedi.turbofish.cc/tags/st7789" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>st7789</span></a> <a href="https://fedi.turbofish.cc/tags/embeddedrust" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>embeddedrust</span></a> <a href="https://fedi.turbofish.cc/tags/embedded" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>embedded</span></a> <a href="https://fedi.turbofish.cc/tags/rust" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rust</span></a> <a href="https://fedi.turbofish.cc/tags/electronics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>electronics</span></a></p>
IT News<p>Hacked Oscilloscope Plays Breakout, Hints at More - You know things are getting real when the Dremel is one of the first tools you tur... - <a href="https://hackaday.com/2024/04/18/hacked-oscilloscope-plays-breakout-hints-at-more/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2024/04/18/hacked</span><span class="invisible">-oscilloscope-plays-breakout-hints-at-more/</span></a> <a href="https://schleuss.online/tags/reverseengineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>reverseengineering</span></a> <a href="https://schleuss.online/tags/toolhacks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>toolhacks</span></a> <a href="https://schleuss.online/tags/teardown" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>teardown</span></a> <a href="https://schleuss.online/tags/breakout" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>breakout</span></a> <a href="https://schleuss.online/tags/ch32f103" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ch32f103</span></a> <a href="https://schleuss.online/tags/firmware" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>firmware</span></a> <a href="https://schleuss.online/tags/dso152" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>dso152</span></a> <a href="https://schleuss.online/tags/fnirsi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fnirsi</span></a> <a href="https://schleuss.online/tags/st7789" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>st7789</span></a> <a href="https://schleuss.online/tags/debug" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>debug</span></a> <a href="https://schleuss.online/tags/risc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>risc</span></a></p>
Hackster.io<p>RT from Wilderness Labs Inc. (@wildernesslabs)</p><p>Check out this @Hacksterio project to learn how to use a <a href="https://noc.social/tags/MPR121" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MPR121</span></a> capacitive keypad and show which buttons are pressed on a <a href="https://noc.social/tags/ST7789" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ST7789</span></a> display using <a href="http://developer.wildernesslabs.co/Meadow/Meadow.Foundation/" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">http://</span><span class="ellipsis">developer.wildernesslabs.co/Me</span><span class="invisible">adow/Meadow.Foundation/</span></a>. <a href="https://www.hackster.io/wilderness-labs/working-with-a-touch-keypad-and-spi-display-using-meadow-ddb040" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">hackster.io/wilderness-labs/wo</span><span class="invisible">rking-with-a-touch-keypad-and-spi-display-using-meadow-ddb040</span></a> <a href="https://noc.social/tags/meadotiot" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>meadotiot</span></a> <a href="https://noc.social/tags/csharp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>csharp</span></a> <a href="https://noc.social/tags/dotnet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>dotnet</span></a> <a href="https://noc.social/tags/iot" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>iot</span></a> <a href="https://noc.social/tags/visualstudio" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>visualstudio</span></a> <a href="https://noc.social/tags/fsharp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fsharp</span></a> <a href="https://noc.social/tags/stm32" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>stm32</span></a> <a href="https://noc.social/tags/esp32" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>esp32</span></a></p><p>Original tweet : <a href="https://twitter.com/wildernesslabs/status/1627700362894356480" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">twitter.com/wildernesslabs/sta</span><span class="invisible">tus/1627700362894356480</span></a></p>