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FreeRTOS+ Ecosystem Showcase  New File System:  DOS compatible FAT FS  UDP/IP:  Thread aware UDP stack  Trace:  Run-time analysis tool  IO:  read(), write(), ioctl() interface  CLI:  Command line interface  Nabto:  Webserver in 1K, see how  TCP/IP:  Low cost pre-ported libraries  CyaSSL SSL / TLS:  Networking security protocols  Safety:  TUV certified RTOS for MCUs  RTOS Training:  Delivered online or on-site FreeRTOS Sponsors Last site update May 1 2013		FreeRTOS Sponsors Get seen by 1000s of embedded engineers a month The AVR Context [RTOS Implementation Building Blocks] A context switch requires the entire execution context to be saved. On the AVR microcontroller the context consists of: 32 general purpose processor registers. The gcc development tools assume register R1 is set to zero. Status register. The value of the status register affects instruction execution, and must be be preserved across context switches. Program counter. Upon resumption, a task must continue execution from the instruction that was about to be executed immediately prior to its suspension. The two stack pointer registers. Next: RTOS Implementation - Saving The Context [ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ] Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2013 Real Time Engineers Ltd. Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.