ESP32 Forum

I am trying to build adn run nuttx for esp32 (ESP-WROOM-32)

I am using xtensa-esp32-elf compiler (https://dl.espressif.com/dl/xtensa-esp3 ... -59.tar.gz)
So, my building process looks as follows:

$ cd tools
$ ./configure.sh esp32-core/nsh
$ . ./setenv.sh
$ make menuconfig
Here is the first question. What values should I set for System Type -> UART Configuration -> UART0 Tx Pin / UART0 Rx Pin ?
ESP-WROOM-32 datasheet says, that pins are 35 (U0TXD) and 34 (U0RXD), but with theese values I do not see anything after bootloader info output.
$ make
$ esptool.py --chip esp32 elf2image --flash_mode dio --flash_size 2MB -o ./nuttx0.bin nuttx
$ esptool.py --chip esp32 write_flash 0x1000 ../myapp/build/bootloader/bootloader.bin 0x4000 ../myapp/build/partitions_singleapp.bin 0x10000 nuttx0.bin

bootloader and partitions_singleapp I build as a part of sample application with using esp-idf (https://github.com/espressif/esp-idf.git)

At load I see olny bootloader output and nothing more after it (but I expect nsh shell).

What am I doing wrong? I tried different values for UART0 Tx Pin / UART0 Rx Pin ( (gpio numbers insted of pin numbers, pin/gpio numbers counting from 0, etc) but without success.

Have you had the opportunity to build a simple "hello world" application in C using the ESP-IDF framework? If not, I'd suggest you have a play with that first to get your feet wet in building and running a simple application and seeing the console output.

kolban wrote:Have you had the opportunity to build a simple "hello world" application in C using the ESP-IDF framework? If not, I'd suggest you have a play with that first to get your feet wet in building and running a simple application and seeing the console output.

I already build some applications using ESP-IDF (to check that WIFI works ok for my purposes) and output is Ok.

Hi ArcSinX,

I'm not sure that the UART driver is working correctly in nuttx right now. There's a thread on the nuttx mailing list that you might want to join, if you're not there already:
https://groups.yahoo.com/neo/groups/nuttx/

Angus

There are a couple of issues with the UART output for now. Also some issues with clocking But there are also a simple work-arounds available for preliminary testing. The exact steps that I use for testing are described in the ESP32 Core v2 README.txt file at configs/esp32-core/README.txt.

Native NuttX control of clocking is pending the release of some code from Expressif. I don't plan to revisit UART issues until clocking logic is first in place. That is horse that needed before the cart.

Greg

I am excited to see that esp32 is natively supported on board-specific level for NuttX RTOS. Although it seems outside the scope of this forum, but may I know how to get started on writing the configs for an custom board with an unsupported MCU? I am using STM32F427II and wish to burn a NuttX RTOS.

Thanks,

Beck

With pixracer (hardware for pixhawk v4) officially support esp8266, and esp32 support NuttX... Is Espressif considering making an custom pixhawk flight controller? Just throwing ideas.


Best,

Beck