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For any questions, please visit Realtek official website RealMCU to get more information.

Table of Content

• 1 Getting Started
  • Knowledge about AmebaD Demo Board
• 2 Documentation
• 3 Environment Setup
  • Windows
  • Linux
  • Connection to Log Console
• 4 Building the First Project on Ameba-D
  • Windows GCC
  • Linux Terminal
• 5 Downloading Images to Ameba-D
• 6 Release Notes

1 Getting Started

Knowledge about AmebaD Demo Board

For Ameba-D, there are many types of chipsets available, such as RTL8720CS, RTL8721CSM, RTL8722CSM, RTL8720DN, RTL8720DM, RTL8721DM, and RTL8722DM. In addition, the chipsets can be embedded on Ameba-D DEV demo board, which is extended to various I/O interfaces. The corresponding HDK (Hardware Development Kit) documents are available, please contact RTK for further details.

The hardware block diagram of Ameba-D demo board is shown below.

• USB TO UART: power supply and log print.
• LOG UART: the baudrate is 115200bps
• SWD: SWD interface, used to download images and debug with IAR.
• Reset button: reset Ameba-D to run firmware after IAR completes download.

2 Documentation

Documentation for latest version: RTL872xCS/RTL872xD Series

3 Environment Setup

Toolchain

Toolchains for windows and linux are supported for now.

Windows

Note: On Windows, you can use Cygwin as the GCC development environment. Cygwin is a large collection of GNU and open source tools which provide functionality similar to a Linux distribution on Windows.

Click http://cygwin.com and download the Cygwin package setup-x86.exe for your Windows platform.

1. 32-bit Cygwin is supported both for 32-bit Windows and 64-bit Windows.

Note: If you can not installed 32-bit Cygwin, refer to Q: How can I install the last Cygwin version for an old, unsupported Windows?. Installation at CMD:

setup-2.912.x86.exe --allow-unsupported-windows --site http://ctm.crouchingtigerhiddenfruitbat.org/pub/cygwin/circa/2022/11/23/063457

2. During the installation of Cygwin package, include Devel -> make and Math -> bc utilities on the Select Packages page, as below shows.

   

Linux

Note: For Linux, please refer to Ameba-D Application Note(PDF) to build the GCC development environment.

Connection to Log Console

On AmebaD board, FTDI Chip and FT232 can be used for the log console and debugger. To view the log console, make use of the terminal tool, such as SecureCRT/TeraTerm/Putty and etc.

1. Select the corresponding serial uart configure communicate parameter and then open it. The default baudrate is 115200bps.

2. Press the Reset button on Ameba-D board. Some messages can be found in the terminal.

   12:27:31.549  calibration_ok:[2:19:11] 
   12:27:31.656  interface 0 is initialized
   12:27:31.658  interface 1 is initialized
   12:27:31.659  
   12:27:31.660  Initializing WIFI ...
   12:27:31.757  WIFI initialized
   12:27:31.758  
   12:27:31.760  init_thread(58), Available heap 0x292c0
   

4 Building the First Project on Ameba-D

Windows GCC

The following steps are for first-time developer to build GCC project, under existing RTK SDK.

Building Code This section illustrates how to build SDK. First, you need to switch to GCC project directory. For Windows, open Cygwin terminal and use cd command to change directory to KM0 or KM4 project directory of Ameba-D SDK.

Note: You need to replace the {path} to your own SDK location, and add cygdrive prefix in front of the SDK location, so that Cygwin can access your file system.

cd /cygdrive/{path}/project/realtek_amebaD_va0_example/GCC-RELEASE/project_lp
cd /cygdrive/{path}/project/realtek_amebaD_va0_example/GCC-RELEASE/project_hp

To build SDK for normal image, simply use make all command under the corresponding project directories on Cygwin (Windows).

For KM0 project, if the terminal contains km0_image2_all.bin and Image manipulating end output message, it means that the image has been built successfully, as below shows.

If somehow it is built failed, type make clean to clean and then redo the make procedure.

After successfully built, the image file is located in project/realtek_amebaD_va0_example/GCC-RELEASE/project_lp/asdk/image , as below shows.

For KM4 project, if the terminal contains km4_image2_all.bin and Image manipulating end output message, it means that the image has been built successfully, as below shows.

If somehow it built failed, type make clean to clean and then redo the make procedure.

After built successfully, the image file is located in project/realtek_amebaD_va0_example/GCC-RELEASE/project_hp/asdk/image, as below shows.

Linux Terminal

To build SDK for normal image on Linux,

1. Set directory to KM0 or KM4 project by entering the following commands in Linux Terminal

cd /{path}/project/realtek_amebaD_va0_example/GCC-RELEASE/project_lp
cd /{path}/project/realtek_amebaD_va0_example/GCC-RELEASE/project_hp

2. Under the corresponding directories, executemake all to build images. You may start with project_lp first followed by project_hp.

   • KM0 project (project_lp)

     • For KM0 project, if the terminal contains km0_image2_all.bin and Image manipulating end output message, it means that the image has been built successfully.

     If somehow it is built failed, type make clean to clean and then redo the make procedure.

     After successfully built, the image file is located in project/realtek_amebaD_va0_example/GCC-RELEASE/project_lp/asdk/image.

   • KM4 project (project_hp)

     • For KM4 project, if the terminal contains km4_image2_all.bin and Image manipulating end output message, it means that the image has been built successfully.

     If somehow it built failed, type make clean to clean and then redo the make procedure.

     After built successfully, the image file is located in project/realtek_amebaD_va0_example/GCC-RELEASE/project_hp/asdk/image, as below shows.

   

Note: If you encountered any error message like:

make[1]: execvp: /{path}/ambd_sdk/project/realtek_amebaD_va0_example/GCC-RELEASE/project_lp/asdk/gnu_utility/prepend_header.sh: **Permission denied**
Makefile:198: recipe for target 'linker_loader' failed

Please run the following command to grant the execution permission for the all corresponding files:

chmod -R 777 {path}/project/realtek_amebaD_va0_example/GCC-RELEASE/

5 Downloading Images to Ameba-D

Realtek provides an ImageTool to download images on windows.

• Environment Requirements: EX. WinXP, Win 7 Above, Microsoft .NET Framework 3.5

Assuming that the ImageTool on PC is a server, it sends images files to Ameba (client) through UART. To download image from server to client, the client must enter uart download first.

1. Enter into UART_DOWNLOAD mode.

   • Push the UART DOWNLOAD button and keep it pressed.
   • Re-power on the board or press the Reset button.
   • Release the UART DOWNLOAD button.

   Now, Ameba board gets into UART_DOWNLOAD mode and is ready to receive data.

2. Click Chip Select(in red) on UI and select chip AmebaD.

3. Select the corresponding serial port and transmission baud rate. The default baudrate is 1.5Mbps (recommended).

4. Click the Browse button to select the images (km0_boot_all.bin/km4_boot_all.bin/km0_km4_image2.bin) to be programmed and input addresses.

   • The image path is located in: {path}\project\realtek_amebaD_va0_example\GCC-RELEASE\project_lp\asdk\image and {path}\project\realtek_amebaD_va0_example\GCC-RELEASE\project_hp\asdk\image, where {path} is the location of the project on your own computer.
   • The default target address is the SDK default image address, you can use it directly.

5. Click Download button to start. The progress bar will show the transmit progress of each image. You can also get the message of operation successfully or errors from the log window.

   

6 Release Notes

Note: For Bluetooth Examples, currently we only support BT_peripheral , BT_central , BT_scatternet , and BT_config four examples.

Vesion Sync

GitHub ameba-rtos-d is currently sync with 6.2 Git 73b6c5ec.