Hi, U1TXD_OUT_IDX and similar idx variables represent signal indexes which are used to route related peripheral output to the gpio. After routing the correct signal to gpio pin, you can access the related peripheral from gpio pin.
Best Regards ________________________________ From: Felipe Moura Oliveira <moura....@gmail.com> Sent: Wednesday, January 15, 2025 3:55 AM To: dev@nuttx.apache.org <dev@nuttx.apache.org> Subject: Assistance Needed with Adding a Low Power UART on ESP32C6 Project [External: This email originated outside Espressif] *Dear All,* I hope this message finds you well. I am currently working on a project using the ESP32C6 and find myself in need of an additional UART, bringing the total to three UARTs. Initially, I considered implementing a UART using bit-banging; however, after reviewing the documentation, I discovered that a low power UART option is available, which seems to suit my requirements. At first glance, adding this UART does not appear to be overly complex. However, I am encountering an issue related to a missing configuration: The UART configurations on the ESP require two parameters that I am having difficulty understanding: .txsig = U1TXD_OUT_IDX, .rxsig = U1RXD_IN_IDX, Could someone please explain what these parameters represent? Upon examining the gpio_sigmap.h file that references the ESP32C6, I noticed that there isn't a similar parameter available for use with the low power UART. How should I proceed in this case? Any guidance or assistance you can provide would be greatly appreciated. Thank you in advance for your support. *Best regards,* -- *Felipe Moura de Oliveira* *Universidade Federal de Minas Gerais* Linkedin <https://www.linkedin.com/in/felipe-oliveira-75a651a0> <https://twitter.com/FelipeMOliveir?lang=pt-br>
