Cortex-M4 sample code

[reneherrero]

There's a lot of focus on the AI pieces of this board, but I find the 2x dual Cortex-M4 co-processors aren't getting the attention they deserve.

To anyone possibly sharing my sentiment, here's the closest I've been able to find:

• The Processor SDK for Linux: http://software-dl.ti.com/processor-sdk-linux/esd/AM57X/latest/index_FDS.html
• A demo project in Rust using the M4s and mailbox on the X15: https://github.com/cambridgeconsultants/rust-beagleboardx15-demo

Hope this helps

[silver2row]

Hello,

Nice!

Seth

[pra-dan]

The Processor SDK 3.15 for the AM572x can be found here : http://downloads.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components/Machine_Learning/tidl.html

The following snippets help in highlighting the role of the A15 processors, although not in the form of a pseudocode or sample codes.

• In the software stack, as can be summarised in the figure:

In cases when user uses TIDL + DSPs or alternatively TIDL + EVEs or a combination of both (TIDL + DSPs + EVEs), the software layers used are:

In case TIDL uses DSP as accelerator there are three software layers:

• TIDL Library that runs on DSP C66
• OpenCL run-time, which runs on A15, and DSP
• TIDL API host wrapper, user space library

In case TIDL uses EVE as accelerator there are four software layers:

• TIDL Library that runs on EVE
• M4 service layer, acting as proxy between EVE and A15 Linux (considered to be part of OpenCL)
• OpenCL run-time, which runs on A15, but also on M4 (IPU1 which is reserved for TIDL OpenCL monitor role)
• TIDL API host wrapper, user space library

• Another use case of the A15 is to use it for maximum performance. TIDL supports network layer distribution among the (4 EVEs + 2DSPs) accelerators present in the AM572x processor. Among the recommended settings, it is mentioned:

  SoftMax layer is terminal layer it is advised to do SoftMax either on A15 (in user space) or using DSP.

[aditya-gumparthi]

hey @reneherrero did you find any more resources? c++ ? i'm in the same place today 😄

[reneherrero]

This seems to be the only option: https://www.ti.com/tool/PROCESSOR-SDK-AM57X