Release notes embOS V3.10p for C166/C167 using Keil compiler
Updated: 2003-06-03 [TB] V3.10p
Updated: 2002-07-02 [AW] V3.10
Updated: 2002-06-25 [TB] V3.09
- Tool chain used for build
- New features
- Program corrections
- Known problems/limitations
- Release history
The following tools have been used:
Compiler : C166 V4.27
Assembler : A166 V4.26
Librarian : LIB166 V4.28
Workbench : uVision2 V2.38a
Absolute timings are based on 20MHz CPU clock and program execution in external FLASH
- Task switch time (SMALL memory model, Release build): 65.2 us = 1304 CPU clock cycles
- Interrupt latency (SMALL memory model, Release build): 0.8 us = 16 CPU clock cycles
- Fast interrupts
embOS does no longer disable interrupts except when modifying the user stack pointer.
Instead ILVL is set to 7. Therefore any interrupt with level 8 or higher can still
be processed. See also the CPU specific manual regarding details.
Unmasked events remain unchanged, when function returns.
Unmasked events remain unchanged, when function returns. Timeout for waiting can be specified.
- Interrupt latency
By supporting fast interrupts, the interrupt latency has been reduced to
3 instructions only.
- embOSView NAT error
Due to segmentation, it is possible, that e.g. pt!=p, although they both point to the same physical address.
The problem occurs, if the compiler has to cast a physical address sent by embOSView to a segmented address
and then compares it with another segmented address. In result it was possible, that embOSView reported
a NAT (not a task) error and could not display the task list. The modificaion forces the compiler to
compare physical address in such a case instead of comparing segmented address.
Functions corrected (interrupts disabled before call of _GetMail)
The function now initializes profiling variables. (Required if TCB is used multiple)
|Version ||Release date ||Short explanation |
|V3.10p ||03.Jun. 2003 ||New compiler and fast interrupts |
|V3.10 ||02.Jul. 2002 ||Two event functions added |
|V3.09 ||25.Jun. 2002 ||First release for C166/C167 using Keil compiler |
This document was first released with version 3.09 of the software.
Copyright 2002 SEGGER Microcontroller Systeme GmbH. All rights reserved.
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