Hi, I got small board - https://www.wemos.cc/en/latest/s2/s2_mini.html - and would like to try NuttX on it. I already have some experience with NuttX, using Raspberry Pi Pico. I am able to build any configuration, upload it to the board and run.
So for ESP32 now... the board uses actually S2 version, it is pretty minimal. Unfortunately, there are just two boards with configs at present, Kaluga and Saola. Both use UART0 for console, not suitable for Mini, because UART0 pins are neither accessible via some pin nor connected to some USB-UART bridge (both Kaluga and Saola use the later). So I tried UART1 with no positive outcome. How I did it: tools/configure.sh esp32s2-saola-1:nsh gmake menuconfig (enable UART1, select it as console) gmake savedefconfig Now, diff tells me: diff -u boards/xtensa/esp32s2/esp32s2-saola-1/configs/nsh/defconfig defconfig --- boards/xtensa/esp32s2/esp32s2-saola-1/configs/nsh/defconfig 2022-10-13 07:38:48.000000000 +0200 +++ defconfig 2023-06-29 17:40:48.902374000 +0200 @@ -21,6 +21,7 @@ CONFIG_BOARD_LOOPSPERMSEC=16717 CONFIG_BUILTIN=y CONFIG_ESP32S2_UART0=y +CONFIG_ESP32S2_UART1=y CONFIG_FS_PROCFS=y CONFIG_HAVE_CXX=y CONFIG_HAVE_CXXINITIALIZE=y @@ -41,4 +42,4 @@ CONFIG_START_MONTH=12 CONFIG_START_YEAR=2011 CONFIG_SYSTEM_NSH=y -CONFIG_UART0_SERIAL_CONSOLE=y +CONFIG_UART1_SERIAL_CONSOLE=y After building, I was able to flash binary to Mini as follows: esptool.py -c esp32s2 -p /dev/cuaU0 -b 921600 write_flash -fs detect -fm dio -ff 40m 0x10000 nuttx.bin esptool.py v4.5 Serial port /dev/cuaU0 Connecting.... Chip is ESP32-S2FNR2 (revision v0.0) Features: WiFi, Embedded Flash 4MB, Embedded PSRAM 2MB, ADC and temperature sensor calibration in BLK2 of efuse V2 Crystal is 40MHz MAC: 48:27:e2:57:1c:ee Uploading stub... Running stub... Stub running... Changing baud rate to 921600 Changed. Configuring flash size... Auto-detected Flash size: 4MB Flash will be erased from 0x00010000 to 0x0002ffff... Compressed 128816 bytes to 53117... Wrote 128816 bytes (53117 compressed) at 0x00010000 in 1.0 seconds (effective 1077.3 kbit/s)... Hash of data verified. Leaving... My USB to serial cable was connected to GPIOs 17 and 18, but I see no activity on reset here. Is there anything missing I should do? One more note - I am somehow stuck with 12.0 sources for now. I am building NuttX on FreeBSD, 12.1 did not build for me. I am just playing with NuttX occasionally, so I can't really investigate it into detail. Regards, Milan
