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https://github.com/lupyuen/nuttx-pinevox
PineVox Smart Speaker with 64-bit RISC-V BL606P on Apache NuttX RTOS
https://github.com/lupyuen/nuttx-pinevox
bl606p nuttx pinevox riscv riscv64
Last synced: 10 days ago
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PineVox Smart Speaker with 64-bit RISC-V BL606P on Apache NuttX RTOS
- Host: GitHub
- URL: https://github.com/lupyuen/nuttx-pinevox
- Owner: lupyuen
- License: apache-2.0
- Created: 2024-04-09T06:57:01.000Z (10 months ago)
- Default Branch: main
- Last Pushed: 2024-04-10T11:00:29.000Z (10 months ago)
- Last Synced: 2024-11-14T18:30:02.796Z (2 months ago)
- Topics: bl606p, nuttx, pinevox, riscv, riscv64
- Homepage:
- Size: 14.6 KB
- Stars: 3
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
# PineVox Smart Speaker with 64-bit RISC-V BL606P on Apache NuttX RTOS
Let's boot Apache NuttX RTOS on PineVox!
- BL606P is the newer, scaled-down variant of BL808 (minus the Low-Power Core)
- NuttX already supports Ox64 BL808
- So NuttX might boot on PineVox BL606P!
BL606P looks something like this (minus the Low-Power Core)...
_What's inside PineVox?_
According to the PineVox Schematic...
- __Mainboard PCB__ contains Bouffalo Lab BL606P SoC, Serial Console, Flash Memory, USB-C Port, Power Mgmt
- __Sideboard PCB__ contains Directional Microphone, Buttons, LEDs
- Connected by a 20-pin Ribbon Cable
USB-C Port connects to a Special USB Cable for PineVox that exposes (pic below)...
- __Boot Switch__ (GPIO 29)
1: Boot from UART (Flashing Mode?)
0: Boot from Flash
- __UART TX / RX__ (GPIO 20 / 21)
(We assume it's for Flashing via BLDevCube)
- __USB Data__ (+ve and -ve)
(For USB Peripherals? Maybe DFU?)
(Schematics will be published soon by PINE64)
_How to flash PineVox with OpenSBI and U-Boot Bootloader?_
Let's try flashing PineVox with BLDevCube...
- [__m0_lowload__](https://github.com/openbouffalo/OBLFR/tree/master/apps/m0_lowload) for M0 Wireless Core (32-bit):
Firmware that forwards __Peripheral Interrupts__ to the D0 Multimedia Core.
[(Like __SD Card__ and __GPIO Interrupts__)](https://lupyuen.github.io/articles/ox64#appendix-peripheral-interrupts)
- [__d0_lowload__](https://github.com/openbouffalo/OBLFR/tree/master/apps/d0_lowload) for D0 Multimedia Core (64-bit):
Basic Bootloader that loads __OpenSBI, U-Boot Bootloader__ and Device Tree into RAM.
- As explained here: ["Flash OpenSBI and U-Boot"](https://lupyuen.github.io/articles/ox64#flash-opensbi-and-u-boot)
TODO: Flash OpenSBI and U-Boot Bootloader
_How to boot NuttX on PineVox?_
We have a problem...
- NuttX boots on Ox64 via microSD. But PineVox doesn't have a microSD Port! (Though BL606P supports microSD)
- Ox64 supports booting over Ethernet (with U-Boot Bootloader). But BL606P doesn't support Ethernet!
- We need a way to load NuttX Image into RAM at 0x5020_0000
- Maybe the M0 Wireless Core (32-bit) will load NuttX Image into RAM? Over WiFi?
_Why use U-Boot Bootloader? Why not flash NuttX directly as Firmware?_
- U-Boot might be simpler for now? Today NuttX boots in RISC-V Supervisor Mode, so we don't need to tweak it to boot in Machine Mode.
- Isolate the Toolchain: BL606P needs a special T-Head C906 Toolchain plus Bouffalo Lab SDK. It's better to isolate OpenSBI + U-Boot, compile them with the special toolchain.
We'll keep them separate from NuttX, which compiles with the popular GCC Toolchain.
- Support Direct Firmware Update (DFU): In future we might support DFU to upgrade the NuttX Image wirelessly. We'll implement DFU with U-Boot (or something similar).
TODO: Load NuttX Image into RAM