Release notes for embOS V3.88 for Renesas SH2A and Renesas HEW4

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

Tool chain used for build

The following tools have been used:

Compiler:  RENESAS shc    V9.04.01.002
Assembler: RENESAS asmsh  V7.01.02.000
Librarian: RENESAS optlnk V10.01.00.000
Workbench: RENESAS HEW    V4.09.00.007

New features

Version 3.88

1. Update to latest embOS generic sources V3.88.

Version 3.86d

1. Update to latest embOS generic sources V3.86d.
2. Start project for Reneses RSKSH2A7269 added.

Version 3.82o

1. New embOS sources V3.82o.
   The new function OS_WaitMailTimed() was implemented to suspend a task at a mailbox with timeout.

Version 3.82n

1. Interrupt stack switching implemented.
   embOS for SH2A and HEW now automatically switches to its own interrupt stack when an embOS interrupt handler is executed.
   The stack switching releases the stack requirements for tasks stacks, as only one interrupt entry sequence will occupy some amount of task stack.
2. New embOS sources V3.82n.
   New features of the lates embOS sources are described in the genric release notes and manual.

Version 3.82e1

1. BSP for RSKSH2A7264 and RSKSH2A7286 added.
   This version includes BSPs for RSKSH2A7264 and RSKSH2A7286.

Version 3.80e

1. New embOS sources 3.82e
   Update to new embOS generic sources 3.82e.
2. New BSP for RSKSH2A7216.
   This new version includes now a BSP for RSKSH2A7216.

Version 3.80g

1. New embOS sources 3.80g
   The new features, improvements and corrections of embOS version 3.80g are desribed in the embOS generig release notes.
2. FPU Library mode check included.
   It is now impossible to run the wrong library with SH2A FPU project settings.

Version 3.62c

1. New embOS sources 3.62c
   The new features, improvements and corrections of embOS version 3.62c are desribed in the embOS generig release notes.

Version 3.52e

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

Improvements

Version 3.82n

1. Interrupt handler optimized
   The embOS interrupt handler OS_CallISR() and OS_CallNestableISR() were optimized to execute faster and take less bytes on the stack.

Version 3.80

1. Task switch time and interrupt handling improved
   Optimization of the CPU specific scheduler and the new embOS sources V3.80 drastically reduced the task switch time and interrupt handling time.

Version 3.62c

1. Interrupt handling improved
   The interrupt handler functions OS_CallISR() and OS_CallNestableISR() were optimized to increase execution speed of embOS interrupts.

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

Version 3.52e

1. 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.

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