Lup Yuen Lee 李立源 @lupyuen@qoto.org

Moving away from LMAC Firmware (since we got no code) ... Let's study the mysterious #BL602 #WiFi Library "libwifi" ... Which has been decompiled into C by BraveHeartFLOSSDev

https://github.com/BraveHeartFLOSSDev/bl602nutcracker1

But 0x4400 0000 is NOT documented in #BL602 Reference Manual! 😲 Now we know a secret ... BL602 talks to LMAC Firmware at Address 0x4400 0000 🤫

https://github.com/bouffalolab/bl_docs/blob/main/BL602_RM/en/BL602_BL604_RM_1.2_en.pdf

#BL602 #WiFi Driver triggers LMAC Interrupt ... By writing to Address 0x4400 0000 ... Let's see what's at 0x4400 0000

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602_wifidrv/bl60x_wifi_driver/reg_ipc_app.h#L66-L69

#BL602 #WiFi Driver talks to LMAC Firmware ... By writing to a Message Buffer and triggering an Interrupt

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602_wifidrv/bl60x_wifi_driver/ipc_host.c#L139-L171

#BL602 #WiFi Manager talks to LMAC Firmware via Message Queue ... Let's find out how it works

https://www.ceva-dsp.com/product/rivierawaves-wi-fi-platforms/

#BL602 #WiFi Manager sends Connect Request to LMAC Firmware thru another Message Queue

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602_wifidrv/bl60x_wifi_driver/bl_msg_tx.c#L315-L371

CEVA has an interesting list of customers

https://csimarket.com/stocks/markets_glance.php?code=CEVA#:~:text=Included%20among%20our%20licensees%20are,%2C%20RDA%2C%20Renesas%2C%20Rockchip%2C

LMAC is the Lower MAC Firmware that runs on the #BL602 Radio Hardware

https://www.ceva-dsp.com/product/rivierawaves-wi-fi-platforms/

To connect to a #WiFi Access Point, #BL602 WiFi Manager sends a request to the Lower MAC Firmware

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602_wifidrv/bl60x_wifi_driver/bl_msg_tx.c#L722-L804

#BL602 #WiFi Manager runs a State Machine ... That connects to the WiFi Access Point in the Background Task

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602_wifidrv/bl60x_wifi_driver/wifi_mgmr.c#L702-L745

#BL602 #WiFi Manager runs as a Background Task ... Here's how we send requests to WiFi Manager

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602_wifidrv/bl60x_wifi_driver/wifi_mgmr.c#L1332-L1343

#BL602 connects to #WiFi Access Point ... By notifying the WiFi Manager

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602_wifidrv/bl60x_wifi_driver/wifi_mgmr_api.c#L40-L84

Here's the #BL602 #WiFi Firmware ... Let's find out how it connects to a WiFi Access Point

https://github.com/lupyuen/bl_iot_sdk/blob/master/customer_app/bl602_demo_wifi/bl602_demo_wifi/main.c#L363

Come join me (the "monster" 😂) as we dive deep into the #WiFi Code inside #RISCV #BL602 (the "wifi chip" 😂)

https://lupyuen.github.io/articles/pinecone#notes

#BL706 AVB ... So many cool things it can do 🤤

#BL706 Audio Video Board ... Many thanks to Bouffalo Lab! 👍

https://github.com/bouffalolab/bl_mcu_sdk/tree/master/docs/chipSpecification/bl70x_docs

DFRobot now sells #STM32 F411 Black Pill 🤔

https://www.dfrobot.com/product-2338.html

"what the * are you doing to the poor wifi chip you monster" 😂

https://www.reddit.com/r/PINE64official/comments/o4u9wj/machine_learning_on_riscv_bl602_with_tensorflow/h2nhxzc?utm_medium=android_app&utm_source=share&context=3

What's Next for #BL602

https://lupyuen.github.io/articles/tflite?21#whats-next

How we Optimise #TensorFlow Lite for #RISCV

https://lupyuen.github.io/articles/tflite?20#optimise-tensorflow