RX-Modulus Core Processor Update

A project log for RX-Modulus (Completely Modular Mouse)

Finally a mouse that can be freely changed, fixed and upgraded suit the user.

benwbenw 08/13/2020 at 14:073 Comments

Some of you many remember that I'll be creating a special Adaptive Interface Core which features a few extra connections for sensors and wireless modules which will aid the adaptive interface set for UCPLA. Well this is now a reality please welcome our new High-Plus Core:

Overall High-Plus Core Features:

- Powerful STM32L4S7 Core

- Supports Changeable Micro-controller Core

- ESD Protection

- 64MB Memory running at 80MHz for system files and offline GIF and Picture storage for Touch-D Modules.

- Extra Interfaces can be added via the I2C Sensor connector for more functionality. 

- Connection for Bluetooth / WiFi Modules to be connected.


Both the High-Plus Core and Dev Interface PWA will be going into prototype manufacture in the next couple of days.


PixJuan wrote 08/19/2020 at 05:34 point

That's a lot of power for a mouse! According to this article, ucLinux can run with 768k, not far from the 640k of STM32 you picked. You could probably run Doom on the touch-D modules though ;-)

Will your mouse draw less than the 500mA allowed by the USB specs?

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benw wrote 08/19/2020 at 06:08 point

I did toy with the idea of doing the Doom Challenge of the Touch-D Module ^^ The extra power of the processor comes in very handly when it comes to adding more features later down the road. I estimated that the core could draw around 25mA to 200mA depending no how hard you run it. I'll be taking real life measurements when the core PCB arrives from manufacture. 

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PixJuan wrote 08/21/2020 at 19:53 point

For my controller project (, I'm using a Teensy4 because I need both a USB host and USB client, but as I feel guilty for using such beast for some very simple processing I I run it underclocked at 150 Mhz hoping to draw less current ^^

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