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RENESAS TOOL NEWS on August 1, 2005: RSO-M3T-MR308-050801D
A Note on Using the Real-Time OSes
M3T-MR308 and M3T-MR30 |
Please take note of the following problem in using the real-time OSes M3T-MR30 and M3T-MR308 (which are used for the M16C family of MCUs):
- On using task pause function
- Products Concerned
| (1) |
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M3T-MR308 V.1.20 Release 1, Release 1A, and Release 1B
In this product, Problem 1 described in Section 2 arises.
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| (2) |
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M3T-MR308 V.1.00 Release 1 through V.1.20 Release 1B
M3T-MR30 V.3.00 Release 1 through V.3.30 Release 2
In these products, Problem 2 described in Section 2 arises. |
NOTES:
M3T-MR308: used for the M32C/90, M32C/80, and M16C/80
M3T-MR30: used for M16C/60, M16C/30, M16C/20, M16C/10, and M16C/Tiny series
- Description
Either of the following problems may arise if programs containing the task pause function of the products concerned are loaded into the emulator debugger to debug:
| Problem 1: |
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The value of the program counter in a task that is in the PAUSE state is incorrectly displayed in the MR Task Pause window of the emulator debugger. |
| Problem 2: |
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The task cannot be exited from the PAUSE state. (If this problem occurs, application programs may not thereafter run properly.) |
- Conditions
| (1) |
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Problem 1 inevitably occurs if a task is entered into the PAUSE state by pressing the PAUSE or COME button in the MR Task Pause window. |
| (2) |
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Problem 2 may occur if a task is entered into the PAUSE state by pressing the PAUSE button in the MR Task Pause window. |
NOTE:
If task_pause is set to YES in the configuration file, neither Problem 1 nor Problem 2 above occurs unless the corresponding condition mentioned above is met.
- Workaround
| (1) |
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For Problem 1, stop executing the program once; then restart it. The value of the program counter will be correctly displayed. |
| (2) |
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For Problem 2, there is no solution. So reset the emulator debugger; then re-execute the program. |
- Schedule of Fixing the Problem
We plan to fix this problem in the next release of the products.
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