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commit c2f19eef3da79888b4cc549264ecb0277ffaa889 Author: dechao_gong <[email protected]> AuthorDate: Thu Sep 24 16:39:10 2026 +0800 Documentation/rtl8730e: document the general-purpose UART ports Add a Features bullet and a "uart" configuration section to the RTL8730E EVB board page describing UART0-2 as /dev/ttyS1-3 at 115200 8N1, the serialrx / serialblaster loopback examples and the runtime TERMIOS support, following the pke8721daf board format. Signed-off-by: dechao_gong <[email protected]> Assisted-by: Claude <[email protected]> --- .../arm/rtl8730e/boards/rtl8730e_evb/index.rst | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/Documentation/platforms/arm/rtl8730e/boards/rtl8730e_evb/index.rst b/Documentation/platforms/arm/rtl8730e/boards/rtl8730e_evb/index.rst index 9aa1577b3c0..45a6bc3b2f7 100644 --- a/Documentation/platforms/arm/rtl8730e/boards/rtl8730e_evb/index.rst +++ b/Documentation/platforms/arm/rtl8730e/boards/rtl8730e_evb/index.rst @@ -35,6 +35,9 @@ Supported in this NuttX port: by the NuttX SMP scheduler * GPIO pins exposed as ``/dev/gpioN`` character devices (input, output and interrupt), driven through the SDK fwlib ROM layer +* General-purpose UARTs exposed as ``/dev/ttySN`` serial devices, driven + through the SDK fwlib ROM layer (the LOG-UART owns the console and + ``/dev/ttyS0``) * littlefs persistent storage mounted at ``/data`` (a dedicated SPI NOR flash partition), backing the Wi-Fi key-value store * Wi-Fi station and SoftAP through the ``wapi`` tool @@ -75,6 +78,26 @@ Pins are encoded with the ``AMEBA_PA()`` / ``AMEBA_PB()`` helpers from ``arch/arm/src/common/ameba/ameba_gpio.h`` (port A/B, pin 0-31), matching the Ameba SDK ``PinName`` layout. +uart +---- + +Minimal NSH with the general-purpose UART driver and the ``serialrx`` / +``serialblaster`` examples enabled (no Wi-Fi). The LOG-UART owns the console +and ``/dev/ttyS0``, so the board registers UART0-2 from its table (see +``boards/arm/rtl8730e/rtl8730e_evb/src/rtl8730e_uart.c``) as ``/dev/ttyS1-3`` +at 115200 8N1. Edit that table -- controller, TX/RX pads and baud -- to match a +board's wiring. The TX/RX pads use the same ``AMEBA_PA()`` / ``AMEBA_PB()`` +encoding as the GPIO table; the driver muxes them to the UART function and +pulls RX high through the SDK ROM. Exercise a port with the examples (loop TX +back to RX, or wire it to a host serial adapter):: + + nsh> serialblaster /dev/ttyS1 26 # stream a test pattern out /dev/ttyS1 + nsh> serialrx /dev/ttyS1 26 # receive and dump bytes from /dev/ttyS1 + +The line format can be changed at runtime through ``tcsetattr()`` (the config +enables ``CONFIG_SERIAL_TERMIOS``). UART3 is reserved for Bluetooth and is not +exposed by the driver. + Wi-Fi =====
