https://cnnblike.com/tags/1-wire/ Recent content in 1-Wire on Punched tape Hugo en-us cnnblike@gmail.com (Ke Li) cnnblike@gmail.com (Ke Li) &copy; Copright 2021 Ke Li Sat, 28 May 2016 09:24:31 +0000 https://cnnblike.com/post/stm32-OneWire/ Sat, 28 May 2016 09:24:31 +0000cnnblike@gmail.com (Ke Li) https://cnnblike.com/post/stm32-OneWire/ <h2 id="0-tldr">0 TL;DR</h2> <p>If you just want to use 1-wire based device and just don&rsquo;t want to know any technical detail, jump to the last part.</p> <h2 id="1-reason-to-use-ds18b20">1 Reason to use DS18B20</h2> <p>I&rsquo;m trying to add some temperature sensor to my STM32-based computer water-cooling controller.</p> <p>You know, a common solution to this is to use some thermistor and try to use some ADC(Analog-Digital-Converter) to capture the voltage on that. The temperature captured by thermistor won&rsquo;t be too accurate, just around 1 degree or so. If you need a temperature with accuracy of 0.0625 degree, the DS18B20 would be a good choice.</p> <p>But DS18B20 has an really time sensitive 1-wire protocol. A normal solution to this problem is to use GPIO and <code>NOP()</code> instruction to simulate this, but I tend to use something different.</p>