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

Tool chain used for build

The following tools have been used:

Compiler:  RENESAS shc    V9.01.00.001
Assembler: RENESAS asmsh  V7.01.01.000
Librarian: RENESAS optlnk V9.02.00.000
Workbench: RENESAS HEW    V4.02.00.022

Performance

1. Task switch time
   < 1.7us
2. Interrupt latency for Fast interrupt
   zero

New features

Version 3.52e

1. NONE, Initial release
   This initial release of embOS SH2A for HEW is based on embOS sources 3.52e.

Improvements

NONE

Program corrections

Version 3.60a

1. Preemptive task switch corrected.
   Preemptive task switch did not work under all circumstances. The status register could have been altered during task switch which might have resulted in malfunction when the preempted task was activated again.
2. embOS libraries with FPU support corrected.
   The floating point registers were not handled correctly during task switch.
   Now, all FPU registers are saved and restored during preemptive task switch.
3. UART interrupt handler for embOSView corrected.
   The break interrupt of the UART was not handled. When a break was detected, the default handler was called which ended in an endless loop.
   Now the break interrupt is handled by embOS. The embOS UART reception error interrupt is called and the break interrupt is cleared.

Known problems / Limitations

NONE

Release history

Miscellaneous

This document was first released with version 3.52e of the software.
Software released earlier is documented internally.
This information is available at request.