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RENESAS TOOL NEWS on November 1, RSO-HI2000/3-051101D
| A Note on Using the Real-Time OS HI2000/3 |
Please take note of the following problem in using the real-time OS --HI2000/3--for the H8S family of MCUs:
- On calculating stack area size
- Versions Concerned
HI2000/3 V1.00r1, V1.00r2, V1.1.02, V.1.02 Release 00 and V.1.03 Release 00
- Description
Formulas for calculating stack area size, which are tabulated in Appendix A (Memory size) in the user's manual, have been corrected as follows.
The user's manual can be seen "HI2000/3 Hitachi Industrial Realtime Operating System for H8S Series"(pdf).
| Title of Table | Correction |
|---|
| Table A.2 OS Stack Area Size Calculation | See (1) and (3) below. |
| Table A.3 Timer Interrupt Stack Area Size Calculation | See (1) and (3) below. |
| Table A.4 Task Stack Area Size Calculation | See (1) and (3) below. |
| Table A.5 Interrupt Handler Stack Area Size Calculation | See (1) and (3) below. |
| Table A.8 Trace Function Stack Area Size Calculation | See (2), (3) and (4) below. |
| (1) |
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| Item |
Calculation |
| For |
Read |
| Stack area for interrupts |
10 * LOWINTNST
+ 6 * UPPINTNST |
10 * LOWINTNST
+ 10 * UPPINTNST |
8 * LOWINTNST
+ 4 * UPPINTNST |
8 * LOWINTNST
+ 8 * UPPINTNST |
|
| (2) |
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| Item |
Calculation |
| For |
Read |
| Stack area for interrupts |
6 * UPPINTNST |
10 * UPPINTNST |
| 4 * UPPINTNS |
8 * UPPINTNST |
|
| (3) |
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| Item |
Calculation |
| For |
Read |
Stack area for undefined
Interrupts |
8 |
14 |
| 6 |
12 |
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| (4) |
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| Item |
Calculation and Size(Bytes) |
| For |
Read |
| Stack area used by OS |
26 |
30 |
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