In the previous article, we peeked at the reset circuit of ESP-Prog with an oscilloscope, and reproduced it with basic components. We observed that it did not behave quite as expected. In this article, we’ll look into the missing pieces. An incomplete circuit For a hint, we’ll first look a bit more closely at the … Continue reading The missing part of Espressif’s reset circuit→ The post The missing part of Espressif’s reset circuit appeared first on Quentin Santos.| Quentin Santos
In previous articles, we saw how to use “real” UART, and looked into the trick used by Arduino to automatically reset boards when uploading firmware. Today, we’ll look into how Espressif does something similar, using even more tricks. “Real” UART on the Saola As usual, let’s first simply connect the UART adapter. Again, we connect … Continue reading Espressif’s Automatic Reset→ The post Espressif’s Automatic Reset appeared first on Quentin Santos.| Quentin Santos
In my previous article, I explained how Arduino makes the life of its users easier by automatically resetting the board when the UART pin DTR (or RTS) transitions from electrically high to low. This exploits the fact that this transition happens automatically when someone or something opens the serial device on the host. That is, … Continue reading Linux always toggles DTR & RTS→ The post Linux always toggles DTR & RTS appeared first on Quentin Santos.| Quentin Santos