nRF52840_PTT

KrzysztofC/nRF52840_PTT

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Author	SHA1	Message	Date
Krzysztof Cieślik	0e348414f8	Implement basic radio TX on fixed channel radio_init() configures RADIO in NRF_1Mbit proprietary mode: 8-bit length field, 4-byte address (BASE0+PREFIX0), 2-byte CRC-16/CCITT, 0 dBm TX power, channel 20 (2420 MHz). READY->START and END->DISABLE shortcuts let radio_tx() trigger the full ramp-up/TX/disable sequence by writing TASKS_TXEN once, then polling EVENTS_END. main.c sends a fixed 4-byte test frame on every button press. FHSS and AES remain compiled but are not called. New bitfield unions in regs.h: radio_pcnf0_t, radio_pcnf1_t, radio_crccnf_t, radio_shorts_t.	2026-05-21 22:53:32 +02:00
Krzysztof Cieślik	438fca0ace	Initial bare-metal foundation for nRF52840 PTT-FHSS - 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	2026-05-21 20:24:33 +02:00

Author

SHA1

Message

Date

Krzysztof Cieślik

0e348414f8

Implement basic radio TX on fixed channel

radio_init() configures RADIO in NRF_1Mbit proprietary mode: 8-bit
length field, 4-byte address (BASE0+PREFIX0), 2-byte CRC-16/CCITT,
0 dBm TX power, channel 20 (2420 MHz). READY->START and END->DISABLE
shortcuts let radio_tx() trigger the full ramp-up/TX/disable sequence
by writing TASKS_TXEN once, then polling EVENTS_END.

main.c sends a fixed 4-byte test frame on every button press.
FHSS and AES remain compiled but are not called.

New bitfield unions in regs.h: radio_pcnf0_t, radio_pcnf1_t,
radio_crccnf_t, radio_shorts_t.

2026-05-21 22:53:32 +02:00

Krzysztof Cieślik

438fca0ace

Initial bare-metal foundation for nRF52840 PTT-FHSS

- 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

2026-05-21 20:24:33 +02:00

2 Commits