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Reverse engineering the V831 npu

License: GNU General Public License v3.0

C 18.05% C++ 81.95%

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v831-npu's Issues

Using in YIHOME CAMERA

HI, a compiled and run this on camera:
https://pt.aliexpress.com/item/32675845174.html

# cat /proc/cpuinfo 
processor       : 0
model name      : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 48.00
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

Hardware        : sun8iw19
Revision        : 0000
Serial          : 0000000000000000

talvez: 800-1000Mhz

# cat /proc/version
Linux version 4.9.118 (shenzhiyuan@user-System-Asus-Z390) (gcc version 6.4.1 (OpenWrt/Linaro GCC 6.4-2017.11 2017-11) ) #2 PREEMPT Thu Sep 23 06:40:57 UTC 2021

This is a good work, How do you reverse engineer it?

Do you have specific information on reverse engineering?

Is it possible that the RK3588 NPU is also a modified NVDLA?

After your work I looked up the NVDLA architecture and find it very similar to the RK3588's "RKNN" (RKNPU2?)

(from Rockchip RK3588 TRM V1.0-Part1-20220309.pdf, page 1985)
With DPU->SDP, PPU->PDP, CORE->CACC.
Some register name, desc and field also matches.