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pm:prj2026:bianca.popa1106:mihai.zegheru [2026/05/21 00:28] mihai.zegheru |
pm:prj2026:bianca.popa1106:mihai.zegheru [2026/05/24 20:53] (current) mihai.zegheru [Introduction] |
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| - | ```dokuwiki | ||
| ====== athreads - A Preemptive MCU Scheduler ====== | ====== athreads - A Preemptive MCU Scheduler ====== | ||
| Line 14: | Line 13: | ||
| [[https://github.com/MihaiZegheru/MegaRT|Project repository]] | [[https://github.com/MihaiZegheru/MegaRT|Project repository]] | ||
| + | |||
| + | [[https://youtu.be/VfSwcjn6ikA?si=I9QuLNzW4YPEeeNd|Video]] | ||
| ===== General Description ===== | ===== General Description ===== | ||
| Line 37: | Line 38: | ||
| ==== Block Diagram ==== | ==== Block Diagram ==== | ||
| - | <code> | + | {{ :pm:prj2026:bianca.popa1106:athreads_block_diagram.jpg?500 |}} |
| - | +-------------------------------------------------------------+ | + | |
| - | | PC / Laptop | | + | |
| - | | | | + | |
| - | | +-------------------------------+ | | + | |
| - | | | Python CPU Task Manager | | | + | |
| - | | | - reads USART packets | | | + | |
| - | | | - plots per-thread CPU usage | | | + | |
| - | | +---------------^---------------+ | | + | |
| - | | | USB Serial | | + | |
| - | +------------------|------------------------------------------+ | + | |
| - | | | + | |
| - | +------------------v------------------------------------------+ | + | |
| - | | Arduino Mega 2560 | | + | |
| - | | | | + | |
| - | | +-------------------------------------------------------+ | | + | |
| - | | | athreads Scheduler | | | + | |
| - | | | | | | + | |
| - | | | - thread table | | | + | |
| - | | | - runtime stack pool | | | + | |
| - | | | - per-thread stack/context | | | + | |
| - | | | - round-robin scheduling | | | + | |
| - | | | - per-thread quantum | | | + | |
| - | | | - sleeping thread wakeup | | | + | |
| - | | | - CPU tick accounting | | | + | |
| - | | +-----------^--------------------^----------------------+ | | + | |
| - | | | | | | + | |
| - | | Timer1 interrupt Timer2 uptime tick | | + | |
| - | | preemption sleep/encoder timing | | + | |
| - | | | | + | |
| - | | +------------------+ +------------------+ | | + | |
| - | | | TFT UI Thread | | Encoder Thread | | | + | |
| - | | | process menu | | input handling | | | + | |
| - | | +--------^---------+ +--------^---------+ | | + | |
| - | | | | | | + | |
| - | | SPI ST7735 TFT Rotary Encoder | | + | |
| - | | | | + | |
| - | | +-------------------------------------------------------+ | | + | |
| - | | | Worker Threads | | | + | |
| - | | | synthetic workloads used for profiling/demo purposes | | | + | |
| - | | +-------------------------------------------------------+ | | + | |
| - | +-------------------------------------------------------------+ | + | |
| - | </code> | + | |
| ===== Hardware Design ===== | ===== Hardware Design ===== | ||
| Line 92: | Line 51: | ||
| * jumper wires and breadboard; | * jumper wires and breadboard; | ||
| * USB cable for programming and serial communication. | * USB cable for programming and serial communication. | ||
| + | |||
| + | {{ :pm:prj2026:bianca.popa1106:athreads_schematic.png?400 |}} | ||
| ==== Component Documentation / Datasheets ==== | ==== Component Documentation / Datasheets ==== | ||
| Line 360: | Line 321: | ||
| <html><a class="media mediafile mf_pdf" href="?do=export_pdf">Export to PDF</a></html> | <html><a class="media mediafile mf_pdf" href="?do=export_pdf">Export to PDF</a></html> | ||
| - | ``` | + | |
