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This repository contains the Pine64 fork of Bouffalo Lab's SDK for their BL602
Wi-Fi/BLE Combo RISC-V SoC. The upstream documentation lives in docs/html.
This repository is the central focus of Pine64's Nutcracker Challenge.
In order to build one of the sample apps, you need to set a few environment variables:
export BL60X_SDK_PATH=/path/to/this/repo export CONFIG_CHIP_NAME=bl602
Then go to the sample directory of interest and call make, for example:
cd customer_app/bl602_boot2 make
Call
make CONFIG_TOOLPREFIX=riscv64-linux-gnu-
for bypassing the bundled cross-compiler and using your distribution's own cross-compiler.
There is a linker script (written in python) at image_conf/flash_build.py. To run this, you need to specify the application and the target, for example:
python3 flash_build.py bl602_boot2 bl602
BL602 is a 32-bit RISC-V based combo chipset supporting Wi-Fi and BLE (Bluetooth Low Energy). The chip is made by Nanjing-based Bouffalo Lab for ultra-low-power applications. In terms of price range and feature set, the chip is competing against Espressif ESP8266
- BL602/604 Datasheet (34 pages): Includes pinout, memory map, and general peripheral descriptions but no detailed functional specification or register listings. Sipeed, a board vendor that plans to use the BL602, claims that full register documentation will be available sometime in November 2020.
- soc602_reg.svd: Contains a seemingly-complete register listing, with names but no descriptions, for the BL602.
- Hardware Notes: Additional information gathered from this repository and elsewhere on the internet.
| Bouffalo Lab BL602 | Espressif ESP8266 | |
|---|---|---|
| Architecture | 32-bit RISC-V @192MHz (dynamic @1-192MHz) L1 cache FPU |
32-bit Xtensa @80MHz (and 160MHz) |
| Memory | 276KB SRAM 128KB ROM 1 Kb eFuse optional embdedded flash XIP QSPI flash support |
32 KiB instruction RAM 32 KiB instruction cache RAM 80 KiB user-data RAM 16 KiB ETS system-data RAM No programmable ROM QSPI flash support (up to 16 MB) |
| Wi-Fi | 802.11 b/g/n @2.4GHz WPS/WEP/WPA/WPA2/WPA3 |
802.11 b/g/n @2.4GHz WEP/WPA/WPA2 |
| Bluetooth | LE 5.0 | NONE |
| GPIO | x16 | x16 |
| SDIO | x1 2.0 slave | x1 v2.0 slave |
| SPI | x1 | x2 |
| UART | x2 | x1.5 (One Tx only) |
| I2C | x1 | x1 (software implemented) |
| I2S | NONE | x1 (with DMA) |
| PWM channels | x5 | x4 |
| ADC | 12-bit | 10-bit (SAR) |
| DAC | 10-bit | NONE |
| Analog Comparator | x2 | NONE |
| DMA | x4 | with I2S |
| Timer | RTC (up to 1 year) x2 32-bit general-purpose |
x1 hardware x1 software (no interrupt gen. on sw. timer) |
| IR Remote Control | x1 | x1 |
| Debug | JTAG support | ? |