How to install Renesas core

Hardware UNO R4 UNO R4 Minima
1

Hello - I want to flash the bootloader but not sure how to install the "Renesas core" as it says in the instructions ?

thanks in advance

cb

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2

I believe what they mean to say is to install the UNO R4 boards into Arduino:
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Now you should be able to now navigate to:

C:\Users\<Your User name>\AppData\Local\Arduino15\packages\arduino\hardware\renesas_uno\1.0.4\bootloaders\UNO_R4

And this directory now contains:

09/24/2023  06:25 AM            35,095 dfu_minima.hex
09/24/2023  06:25 AM            43,366 dfu_wifi.hex
09/24/2023  06:25 AM             1,832 README.md

Now look at the README.md file
it gives you more up to date instructions on how to build bootloader, plus how to flash them. Including link to where you can download the rfp-cli

3

These instruction are out to date.

For the step 2, the file you need is dfu_minima.hex for the minima
You'll find it in this directory Arduino15\packages\arduino\hardware\renesas_uno\1.0.4\bootloaders\UNO_R4 (windows)
And you follow next step
the renesas software will use this file to flash the bootloader to the core

1 Like
4

Hello - thanks very much for your replies Kurt & Tony.

thanks

cb

5

Hello everyone, apologies for the confusion. I've updated the instructions based on the feedback. The changes should be live any moment.

1 Like
6

Hello sorry for the thread reboot but i've been looking everywhere and I just CANNOT find a tutorial on how to flash the Renesas RA4M1 chip to use it with the arduino IDE... Are the files in the arduino folder or something ?

7

Hi @lyly110795. The tutorial discussed in this topic is here:

https://docs.arduino.cc/tutorials/uno-r4-minima/cheat-sheet/#bootloader

If that doesn't resolve your doubts, come back here with a detailed description of what you are trying to accomplish, what you have tried, and what difficulties you have encountered and the forum helpers will try to assist you.

Please note that you do not normally need to perform this "flash the bootloader" procedure in order to use an UNO R4 Minima with Arduino IDE. This procedure is only needed for certain rare specific advanced use cases and situations that the average UNO R4 Minima will never encounter. Unless you know you need to perform this procedure, I recommend you instead follow the "Getting Started" guide:

https://docs.arduino.cc/tutorials/uno-r4-minima/minima-getting-started/

1 Like
8

Oh okok I just found it thank you!

Let's say I were to replace a damaged Renesas RA4M1 MCU I would simply flash the bootloader and then I could connect it to the IDE and use it normally ?

9

I would guess so, but I haven't tried it myself so I can't say for sure. It is worth a try anyway! Hopefully one of the other forum helpers will be able to provide a better answer to your question.