Build for Hexagon Sensors DSP (sDSP)

Prerequisite: voxl-hexagon docker image

Follow the instructions to install voxl-docker and the voxl-hexagon docker image here.


There are two DSPs available for programming on VOXL (Snapdragon 821). The Sensors DSP (sDSP) and the Applications DSP (aDSP)

The sDSP is a real-time digital signal processor to offload real-time I/O tasks from the CPU. A flight controller, for instance, can be run on this DSP.

The aDSP is well suited for computer vision, fixed-point offloading tasks.


Examples of how to write code for the Qualcomm® Hexagon™ Sensors Low Power Island:

Name Description Link
Hello World Simple hello world application to build and run code on the sDSP processor GitLab
libvoxl-io Talk to serial ports through the sDSP GitLab



mini-dm is a diag log tool for debugging the Hexagon DSP that comes with Hexagon SDK.

To configure on Ubuntu:

lsusb and find the Qualcomm entry. VOXL’s device ID is 05c6:901d Qualcomm, Inc.

Edit /etc/udev/rules.d/70-android.rules and add the following line: SUBSYSTEM=="usb",ATTRS{idVendor}=="05c6",ATTRS{idProduct}=="901d",MODE=="0666"

To run:

$ ./Qualcomm/Hexagon_SDK/3.3.3/tools/debug/mini-dm/Linux_Debug/mini-dm