Now porting #Mynewt + #RustLang to #PineCone #BL602 #RISCV

https://github.com/lupyuen/pinecone-rust-mynewt

Adding Board Support Package for #PineCone #BL602 to #Mynewt

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/hw/bsp/pinecone/bsp.yml

Disassembled the #PineCone #BL602 HelloWorld App for reference

https://github.com/lupyuen/bl_iot_sdk/releases/download/v0.0.4/sdk_app_helloworld.S

#BL602 Start Code comes from here...

https://github.com/lupyuen/bl_iot_sdk/blob/master/components/bl602/bl602/evb/src/boot/gcc/start.S

#BL602 Flash Memory Map for #Mynewt ... With my handy hex calculator

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/hw/bsp/pinecone/bsp.yml#L36-L74

#BL602 Linker Script for #Mynewt

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/hw/bsp/pinecone/bsp_app.ld

Set #PineCone #BL602 as the Firmware Target for #Mynewt

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/targets/pinecone_app/target.yml

Building #Mynewt for #PineCone #BL602 ... Now using the right #RISCV GCC

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/README.md

#RISCV on #Mynewt depends on SiFive FE310 ... Let's break the dependency 🤔

Porting #Mynewt Context Switching to #BL602 ... CLINT = #RISCV Core Local Interrupt controller

https://github.com/apache/mynewt-core/blob/master/kernel/os/src/arch/rv32imac/ctx.s#L193

#BL602 looks similar to SiFive FE310 ... Porting #Mynewt from FE310 to BL602 seems straightforward

Unlike SiFive FE310, #BL602 doesn't have a Platform-Level Interrupt Controller (PLIC) ... This #RISCV code in #Mynewt needs to be fixed 🤔

https://github.com/apache/mynewt-core/blob/master/kernel/os/src/arch/rv32imac/os_arch_rv32imac.c#L214

#BL602 #Mynewt compiles OK ... Now fixing the Reset Handler

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/README.md

Now porting the missing HAL functions for #Mynewt #BL602

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/README.md

Still porting the missing HAL functions for #Mynewt #BL602

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/README.md

#BL602 #Mynewt Firmware built successfully yay! (Using stubs for HAL functions) Now inspecting the Disassembled Firmware

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/README.md

Disassembly of #BL602 #Mynewt Firmware looks OK ... Reset Handler is at the right address ... Let's run this firmware!

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/README.md

Nope OpenOCD + JTAG doesn't work for loading #Mynewt Firmware into #BL602 Flash Memory ... Let's load the #RISCV Firmware into RAM instead

https://github.com/lupyuen/pinecone-rust-mynewt/blob/main/README.md