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rtthread on Tang Mega 138K

System Version

Not specified

Status

basic

Last Update

2024-06-21

RT-Thread Tang Mega 138K Pro Test Report

Test Environment

Operating System Information

Hardware Information

  • Tang Mega 138K Pro Dock
  • A type A to C cable
  • A UART serial cable
  • Power supply come with the board

Installation Steps

The following instructions are based on building in a Linux system. For Windows, please install AE350 SOC RDS and perform the same operations in the included Cygwin environment unless otherwise specified

If IDE functionality is not needed, you don’t need an RDS License for building on Windows

Copy and Patch Code

RT-Thread code is located within the source code package at ref_design/MCU_RefDesign/ae350_rtthread_nano. Extract it to your workspace.

If using Linux, patch Debug/makefile: Replace the following contents:

diff --git a/Debug/makefile b/Debug/makefile
index eb97e6d..232a162 100644
--- a/Debug/makefile
+++ b/Debug/makefile
@@ -119,7 +119,7 @@ $(SECONDARY_OUTPUT_PATH)/.PHONY.size: $(LINKER_OUTPUTS)
 
 $(SECONDARY_OUTPUT_PATH)/ae350-ddr.ld: $(SAG_SRCS)
 	@echo 'Invoking: LdSaG Tool'
-	nds_ldsag --version=v5 -t "$(ANDESIGHT_ROOT)/utils/nds32_template_v5.txt" "$(SAG_FILE)" -o $(LDSAG_OUT)
+	cp ../src/bsp/sag/ae350-ddr.ld $(LDSAG_OUT)
 	@echo 'Finished building: $@'
 	@echo ' '

If an error occurs, ensure the line endings should be CRLF.

Replace the working directory:

find -name "*.mk" -exec sed -i "s|/cygdrive/E/RDS5/workspace/ae350_rtthread_nano|$(pwd)|g" {} \;

Compile Code

Linux

Unpack the cross-compilation toolchain; it’s recommended to use nds32le-elf-mculib-v5. Assume its path is $(nds32_path).

Compile the target file:

cd Debug
make CROSS_COMPILE=$(nds32_path)/bin/riscv32-elf-

Windows

Open the Cygwin environment included with RDS: Run Cygwin.bat located in the Cygwin directory of the RDS installation path.

cd to the source folder (disk is located at /cygdrive/$(Drive letter)).

Compile the target file; replace $(RDS_ROOT) with your RDS installation path:

cd Debug
make ANDESIGHT_ROOT=<RDS_ROOT> CROSS_COMPILE=<RDS_ROOT>/toolchains/nds32le-elf-mculib-v5/bin/riscv32-elf-

Get FPGA Bitstream

Tang Mega 138K is supported only in the commercial version

The FPGA project can use the demo provided by Sipeed, located in the ae350_customized_demo inside TangMega-138KPro-example. The bitstream is already compiled and does not need to be regenerated.

Download Bitstream

Connect to the FPGA and use the Gowin Download Tool to download the bitstream.

Program Flash

Use programmer.exe located in the flash directory of the RDS installation. Configure as follows:

  • External Flash Mode: 5AT
  • exFlash C: Bin Erase, Program 5AT
  • Start address: 0x600000

image

If there is no output after programming, you may need to re-download the bitstream.

Connect to Serial Port

By default, UART2 is bound to:

IO_LOC "UART2_TXD" U16;     //1
IO_LOC "UART2_RXD" V16;     //2

View Output

View the RT-Thread output via the serial port.

Expected Results

The system boots normally and the output from RT-Thread can be viewed via the onboard serial port.

Actual Results

The system boots normally and the output from RT-Thread can be viewed via the onboard serial port.

Boot Log


It's a RT-Thread Nano version demo.

Initializes RT hw board...

 \ | /

- RT -     Thread Operating System

 / | \     3.1.5 build Apr 16 2024

 2006 - 2020 Copyright by rt-thread team

RT demo...

Test Criteria

Successful: The actual result matches the expected result.

Failed: The actual result does not match the expected result.

Test Conclusion

Test successful.

Source: Support Matrix