https://github.com/devkitpro/calico

RTOS-like bare metal platform support library for Nintendo GBA and DS(i)
https://github.com/devkitpro/calico

Last synced: 8 months ago
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RTOS-like bare metal platform support library for Nintendo GBA and DS(i)

• Host: GitHub
• URL: https://github.com/devkitpro/calico
• Owner: devkitPro
• License: other
• Created: 2020-05-22T16:23:23.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2025-05-11T20:43:04.000Z (9 months ago)
• Last Synced: 2025-06-09T18:18:04.590Z (8 months ago)
• Language: C
• Homepage:
• Size: 919 KB
• Stars: 20
• Watchers: 7
• Forks: 1
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: COPYING

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README

          
# calico

Calico is a system support library currently focused on the Nintendo DS(i). It provides operating system-like facilities for homebrew applications, and serves as a new foundation for libnds (and DS homebrew in general). Its main features include:

- Multitasking system, providing threads (inspired by Horizon). Scheduling is preemptive and based on multiple priority levels, similar to real-time operating systems.

- Synchronization primitives: mutex, condition variable, mailbox.

- Interrupt and timed event handling.

- Low-level support bits for integration with devkitARM (crt0, linker scripts, syscall implementations).

- Message passing between the two processors (ARM9 and ARM7).

- New device drivers for ARM7 peripherals, with programming interfaces accessible from the ARM9:

	- Power management, including sleep mode and application lifecycle management

	- Touch screen (both DS mode and DSi mode)

	- Real-time clock

	- Audio and microphone

	- Storage devices, including DLDI and DSi SD/eMMC

	- Wireless communications (Mitsumi/NDS and Atheros/DSi)