eren-terzioglu opened a new pull request, #16315: URL: https://github.com/apache/nuttx/pull/16315
## Summary Add missing RS485 support for Risc-V based Espressif devices * arch/risc-v/espressif: Fix Serial IFLOW build issue Serial IFLOW build error fixed for risc-v based Espressif devices * arch/risc-v/espressif: Add RS485 support for esp32[c3|c6|h2] Add RS485 support for Risc-V based Espressif devices ## Impact Impact on user: No, missing feature added Impact on build: Current builds works fine, new option added for new feature Impact on hardware: Serial peripheral got affected, new feature added Impact on documentation: No Impact on security: No Impact on compatibility: No, it is compatible between older defconfigs ## Testing <!-- Please provide all the testing procedure. Consider that upstream reviewers should be able to reproduce the same testing performed internally --> ### Building This command used to build: ``` ./tools/configure.sh esp32c6-devkitc:nsh && kconfig-tweak -e CONFIG_ESPRESSIF_UART1 && kconfig-tweak -e CONFIG_ESPRESSIF_UART1_RS485 && kconfig-tweak -e CONFIG_EXAMPLES_SERIALRX && kconfig-tweak -e CONFIG_EXAMPLES_SERIALRX_PRINTSTR && kconfig-tweak -e DEBUG_SYMBOLS && make olddefconfig && make flash ESPTOOL_BINDIR=./ ESPTOOL_PORT=/dev/ttyUSB0 -s -j$(nproc) && minicom ``` ### Connection list 2 MAX485 adapter used ##### Transmitter Side: | ESP Device (esp32c3, esp32c6, esp32h2) | MAX485 Adapter | |----------------------------------------|----------------| | GPIO8 | DI | | GPIO9 | RO | | GPIO4 | DE | | GPIO4 | RE | #### Reciever Side | ESP Device (esp32c3, esp32c6, esp32h2) | MAX485 Adapter | |----------------------------------------|----------------| | GPIO8 | DI | | GPIO9 | RO | | GPIO4 | DE | | GPIO4 | RE | ### MAX485 Adapter Connections | MAX485 Adapter | MAX485 Adapter | |----------------|----------------| | A | A | | B | B | Overall connection looks like this: ESP-Device -- MAX485 Adapter -- MAX485 Adapter -- Logic Analyzer/ESP-Device ### Running Transmitter - Reciever test: `echo 1 > /dev/ttyS1` command used to send data and we can see "1\n" output on logic analyzer and other ESP-Device -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
