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Introduction
The Renesas RL78/G14 Fast Prototyping Board is an development board of the manufacterer Renesas. The device is a 16 bit CPU with 48kB of RAM and 512kB of ROM. It is capable as an application controller for the iRJ45/SoM module.
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Currently the RL78/G14 is only compatible with uGoal. |
Software
Integrated Development Environment
The e2 studio by Renesas is a free Integrated Development Environment which provides several utilities to develope and debug applications for the RL78/G14 Fast Prototyping Board. It is available on the Renesas website.
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If you just want to use our applications, you won’t need the IDE. |
Building and Flashing
There are two Toolchains available to build applications for the Renesas RL78/G14: the CCRL and the GNURL78 Toolchain. The former one is provided by Renesas and is free for applications up tp 64 kB of linkage size.
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To flash the device we’re using the Renesas Flash Programmer. You can download the Programmer from here.
Getting Started
Preparations
Hardware Requirements
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Make sure following settings are set:
J13 - Connect “iRJ45” with “Sockel”
J8 - Connect “CS_SOURCE” with “PB2”
J7 - Connect “RST_SOURCE” with “PD7”
Set all DIP-Switches to “OFF”
RL78/G14 Fast Prototyping Board
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Per default there are no jumpers to set on this board.
Target System
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Connect both boards (see Figure above). Voltage supply is done through the VCC33_Sockel by the Rl78/G14.
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Please connect both boards with each other, before you connect them per USB to your computer. |
Using delivered build system
Within a example folder “ugoal/projects/ugoal/…” of the software delivery, build the firmware with following commands:
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make PLATFORM=rl78g14 clean |
Using e2 studio by Renesas
This chapter describes the integration of the source files into a new e2 studio project, to edit, compile and debug the software delivery.
Automatic project generation
From any project folder a project generator can be run to create an e2studio project for the application. The project generator requires a python3 installation. Required dependencies are installed automatically.
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The imported project can be compiled and debugged:
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Manually import sources into new project
Install the latest e2 studio with RL78 support, which is downloadable from https://www.renesas.com/us/en/software-tool/e-studio.
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Now the project is succesfully integrated and configured. |
Build and Run application with e2 studio
Click “Build” in the upper left corner of e2 studio, to build the application. The output should look like this:
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Now the build *.elf can be started by selecting “Launch in ‘Debug’ Mode” in the toolbar. |
Debugging
UART
The RL78/G14 Fast Prototyping Board provides multiple UART-interfaces. In the example application the UART0 is used. You can access the UART by the PMOD1 interface by connecting a USB-to-serial adapter to the TxD0 of the RL78/G14 and launching a serial monitor like putty. Choose the following settings:
Speed | 115200 |
Data Bits | 8 |
Stop Bits | 1 |
Parity | Odd |
Flow Control | XON/XOFF |
Application
After setting up the serial monitor and starting the application, the output should look like this:
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[INF] ../rpc/goal_mctc_rb.c:277 creating rpc ring buffer with buffer size 768 and elem size 256 [INF] ../rpc/goal_mctc_rb.c:277 creating rpc ring buffer with buffer size 768 and elem size 256 [INF] ../goal_media/goal_mi_mctc.c:793 rpc transfer size set to 1024 [INF] ../goal_media/goal_mi_mctc.c:723 peer requested Sync Init [INF] ../goal_media/goal_mi_mctc.c:723 peer requested Sync Init [INF] ../goal_media/goal_mi_mctc.c:723 peer requested Sync Init [INF] ../goal_media/goal_mi_mctc.c:723 peer requested Sync Init [INF] ../goal_media/goal_mi_mctc.c:455 RPC state synchronized, running appl_setup [INF] ../goal_media/goal_mi_mctc.c:458 configuring timeout values for peer [INF] ../pnio/goal_pnio_rpc_ac.c:259 PROFINET Application Core successfully started [INF] ../example/02_profinet/goal_appl.c:188 Initializing device structure [INF] ../example/02_profinet/goal_appl.c:230 PROFINET ready [INF] ../goal_media/goal_mi_mctc.c:487 local setup done [INF] ../ugoal/ugoal.c:212 HEAP utilization: 3400/4096 (83%). |
Known Issues
Following you’ll find current limitations regarding the RL78/G14.
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