Luke is too modest. Something in the region of 5 million chips containing his hobby CPU have shipped since launch on August 8, 2024.
replyCould you share a link or more details? What is this hobby CPU project?
replyI think the GP is talking about the Hazard3 [1] core. This is one of the CPU cores besides the ARM M33 instantiated on the RP2350 µC [2]. See this article from Luke Wren (Wren6991) back when the RP2350 came out [3].
reply[1] https://github.com/Wren6991/Hazard3
[2] https://www.raspberrypi.com/products/rp2350/
[3] https://www.raspberrypi.com/news/risc-v-on-raspberry-pi-pico...
What I find interesting is that RP2350 is designed as "one or the other", no way to use ARM and RISC-V concurrently, and has fuses that can kill ARM M33 cores outright.
replyMakes me wonder if an "ARM cores fused off, RISC-V only, no ARM fees" SKU is possible.
You can choose Arm in one pair and RISC-V in the other pair if you want.
replySeveral of the peripherals in the RP2350 are also ARM IP.
replyThank you!
replyLuke Wren works at Raspberry Pi and designed the Hazard3 CPU core that is in the RP2350 chip.
replyThey did explicitly specify:
reply> 1. Supported in mainline LLVM and GCC.
Which pretty well encapsulates the ecosystem requirements.