f654df0e78
- Fully open toolchain: arm-none-eabi-gcc inside Podman/Docker container - Platform-agnostic build via justfile (auto-detects podman vs docker) - CMake + Ninja build system with arm-none-eabi toolchain file - nRF52840 linker script and startup with full 64-entry vector table - Register access via typed bitfield unions (include/regs.h) - FHSS channel sequencer: AES-128-ECB PRNG over 40 channels (2402-2480 MHz) - Low-power sleep via SYSTEM_ON WFI + GPIOTE wakeup on button press - Vendor deps as shallow git submodules: nrfx, CMSIS_5, tiny-AES-c
67 lines
1.3 KiB
Plaintext
67 lines
1.3 KiB
Plaintext
/*
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* nRF52840 — no SoftDevice
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* Flash: 1 MB @ 0x00000000
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* RAM: 256 KB @ 0x20000000
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*
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* Before first flash, erase the entire chip to remove any SoftDevice:
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* pyocd erase --target nrf52840 --chip
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*/
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 1024K
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RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 256K
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}
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/* stack grows downward from the top of RAM */
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_estack = ORIGIN(RAM) + LENGTH(RAM);
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ENTRY(Reset_Handler)
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SECTIONS
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{
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/* vector table must be at the start of Flash */
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.isr_vector :
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{
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KEEP(*(.isr_vector))
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. = ALIGN(4);
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} > FLASH
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/* code and read-only data */
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.text :
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{
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*(.text .text.*)
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*(.rodata .rodata.*)
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. = ALIGN(4);
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_etext = .;
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} > FLASH
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/* load address of .data in Flash — Reset_Handler copies from here */
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_sidata = LOADADDR(.data);
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/* initialized variables: stored in Flash, run from RAM */
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.data :
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{
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_sdata = .;
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*(.data .data.*)
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. = ALIGN(4);
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_edata = .;
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} > RAM AT > FLASH
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/* zero-initialized variables: Reset_Handler clears this region */
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.bss (NOLOAD) :
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{
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_sbss = .;
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*(.bss .bss.*)
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*(COMMON)
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. = ALIGN(4);
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_ebss = .;
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} > RAM
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/DISCARD/ :
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{
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*(.ARM.exidx*)
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*(.gnu.linkonce.armexidx.*)
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}
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}
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