Updated: 2004-12-27 [AW] V3.24b

1. Tool chain used for build
2. Performance
3. New features
4. Improvements
5. Program corrections
6. Known problems/limitations
7. Release history
8. Miscellaneous

Tool chain used for build

The following tools have been used:

Compiler:  Cosmic CxST7
Assembler: Cosmic Cast7
Librarian: Cosmic Clib
Workbench: Cosmic Idea  V2.9

Performance

1. Task switch time (long stack model, Release build)
   ST72F521: 208 us
2. Interrupt latency (long stack model, Release build)
   ST72F521: 49.5 us

Absolute timings are based on 8 MHz internal CPU clock
Task switch time depends on actual stack usage

New features

Version 3.22a

1. OS_PutMailFront() / OS_PutMailFront1
   New mailbox functions to enable LIFO behavior of mailboxes.
2. OS_PutMailFrontCond() / OS_PutMailFrontCond1()
   New conditional mailbox functions to enable LIFO behavior of mailboxes.

Version 3.20

1. OS_Suspend() / OS_Resume() implemented
   New functions to suspend and resume tasks unconditionally.
2. Fixed size memory blocks implemeted
   New functions to allocate fixed size memory blocks from embOS.

Version 3.10k

1. OS_GetMailTimed()
   New mailbox retrieving function with timeout.

Version 3.10d

1. OS_GetpCurrentTimer()
   New info routine. May be used in timer callback routines to examine which timer expired.
2. OS_GetpCurrentTask()
   New info routine. May be used to examine current running task.

Version 3.10

1. Data format for communication with embOSView modified
   For terminal I/O in embOSView, the data farmat was changed. Therefore embOSView V3.10 or later is required.
2. OS_WaitSingleEvent()
   Unmasked events remain unchanged when function returns.
3. OS_WaitSingleEventTimed()
   Unmasked events remain unchanged when function returns. Timeout for waiting can be specified.

Version 3.08

1. Message Queues
   Message queues enable intertask communication with messages of various size.

Improvements

NONE

Program corrections

Version 3.24b

1. OS_GetTime() function corrected
   OS_GetTime() implementation for ST7 CPU enabled interrupts.
   This could cause malfunction of embOS software timers as a side-effect. Software timers might have been blocked even though they were retriggered.
   This problem exists in all previous embOS versions for ST7 and is fixed with version 3.24b.

Version 3.10p

1. GetMail functions corrected
   Internal functions for retrieving mail from a mailbox did not disable interrupts. This could cause message losses, when mail was written into mailboxes from within interrupt handlers.
   This problem exists in all previous embOS versions and is fixed with version 3.10p.

Known problems / limitations

Version 3.10d

1. Only long stack memory model supported


2. Nested interrupts not supported by embOS

Release history

Miscellaneous

This document was first released with version 3.10d of the software.
Software released earlier is documented internally.
This information is available at request.