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Merge pull request #24 from WyliodrinEmbeddedIoT/clue_nrf52840
Enable bootloader for Adafruit CLUE nRF52840
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‎boards/clue_nrf52840-bootloader/Cargo.toml‎

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[package]
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name = "clue_nrf52840-bootloader"
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version = "0.1.0"
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authors = ["Tock Project Developers <[email protected]>"]
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build = "build.rs"
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edition = "2018"
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[dependencies]
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# cortexm4 = { git = "https://github.com/tock/tock", branch = "master" }
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# capsules = { git = "https://github.com/tock/tock", branch = "master" }
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# kernel = { git = "https://github.com/tock/tock", branch = "master" }
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# nrf52 = { git = "https://github.com/tock/tock", branch = "master" }
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# nrf52840 = { git = "https://github.com/tock/tock", branch = "master" }
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# components = { git = "https://github.com/tock/tock", branch = "master" }
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# nrf52_components = { git = "https://github.com/tock/tock", branch = "master" }
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# For Development
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cortexm4 = { path = "../../../tock/arch/cortex-m4" }
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capsules = { path = "../../../tock/capsules" }
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kernel = { path = "../../../tock/kernel" }
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nrf52 = { path = "../../../tock/chips/nrf52" }
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nrf52840 = { path = "../../../tock/chips/nrf52840" }
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components = { path = "../../../tock/boards/components" }
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nrf52_components = { path = "../../../tock/boards/nordic/nrf52_components" }
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bootloader = { path = "../../bootloader" }
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bootloader_nrf52 = { path = "../../chips/bootloader_nrf52" }
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bootloader_cortexm = { path = "../../arch/bootloader_cortexm" }
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[build-dependencies]
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bootloader_attributes = { path = "../../tools/bootloader_attributes" }
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[profile.dev]
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panic = "abort"
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lto = false
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opt-level = "z"
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debug = true
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[profile.release]
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panic = "abort"
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lto = true
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opt-level = "z"
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debug = true

‎boards/clue_nrf52840-bootloader/Makefile‎

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# Makefile for building the Tock bootloader for nRF52 platforms using CDC-ACM
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# over USB.
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TOCK_ARCH=cortex-m4
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TARGET=thumbv7em-none-eabi
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PLATFORM=clue_nrf52840-bootloader
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include ../Common.mk
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TOCKLOADER=tockloader
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# Where in the flash to load the kernel with `tockloader`
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KERNEL_ADDRESS=0x26000
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ifdef PORT
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TOCKLOADER_GENERAL_FLAGS += --port $(PORT)
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endif
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# Upload the kernel over JTAG
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.PHONY: flash
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flash: $(TOCK_ROOT_DIRECTORY)target/$(TARGET)/release/$(PLATFORM).bin
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$(TOCKLOADER) $(TOCKLOADER_GENERAL_FLAGS) flash --address $(KERNEL_ADDRESS) --board nrf52dk --jlink $<
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# Upload the kernel over JTAG using OpenOCD
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.PHONY: flash-openocd
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flash-openocd: $(TOCK_ROOT_DIRECTORY)target/$(TARGET)/release/$(PLATFORM).bin
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$(TOCKLOADER) $(TOCKLOADER_GENERAL_FLAGS) flash --address $(KERNEL_ADDRESS) --board nrf52dk --openocd $<

‎boards/clue_nrf52840-bootloader/README.md‎

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Adafruit CLUE - nRF52840 Express with Bluetooth LE Tock Bootloader
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===================
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This is the implementation of the Tock bootloader for the Adafruit CLUE - nRF52840 Express with Bluetooth LE
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board. The bootloader runs using the CDC-ACM over USB stack.
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Compiling
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---------
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Here are the steps:
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```
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make
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cp ../../target/thumbv7em-none-eabi/release/clue_nrf52840-bootloader.bin ./clue_nrf52840-bootloader.bin
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```
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Converting to UF2
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-----------
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Install [uf2conf](https://github.com/microsoft/uf2/blob/master/utils/uf2conv.py)
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```
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uf2conv clue_nrf52840-bootloader.bin -f 0xADA52840 --base 0x26000 --output clue_nrf52840-bootloader.uf2
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```

‎boards/clue_nrf52840-bootloader/build.rs‎

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extern crate bootloader_attributes;
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fn main() {
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println!("cargo:rerun-if-changed=layout.ld");
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println!("cargo:rerun-if-changed=../kernel_layout.ld");
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let mut f = bootloader_attributes::get_file();
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bootloader_attributes::write_flags(&mut f, "1.1.0", 0x36000);
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bootloader_attributes::write_attribute(&mut f, "board", "clue_nrf52840");
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bootloader_attributes::write_attribute(&mut f, "arch", "cortex-m4");
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bootloader_attributes::write_attribute(&mut f, "appaddr", "0x80000");
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}

‎boards/clue_nrf52840-bootloader/layout.ld‎

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MEMORY
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{
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rom (rx) : ORIGIN = 0x00026000, LENGTH = 64K
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prog (rx) : ORIGIN = 0x00036000, LENGTH = 808K
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ram (rwx) : ORIGIN = 0x20000000, LENGTH = 128K
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}
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MPU_MIN_ALIGN = 8K;
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PAGE_SIZE = 4K;
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INCLUDE ../kernel_layout.ld

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