/tags/usart/Recent content in USART on JKTDEV.CO.UKHugoen-usTue, 01 Sep 2026 21:29:21 +0100/posts/buildingblockspt37/Tue, 01 Sep 2026 21:29:21 +0100/posts/buildingblockspt37/<p>Yesterday I had some time to continue debugging the C code that I had been porting from my previously developed Arduino code, which uses megaTinyCore, over to plain C using the MPLAB tools in Visual Studio Code.</p> <p>As suspected, the problem turned out to be a USART register configuration issue, although it wasn&rsquo;t quite the issue I had originally expected.</p> <p>My first thought was that I had failed to correctly configure the GPIO line connected to the DE, or Driver Enable, pin of the RS485 transceiver, which in this case is a TI ISO1430.</p>