1. Product and Versions Concerned
Product: HI1000/4
Versions: V1.0.05, V1.0.06, V.1.01 Release 00, V.1.02 Release 00,
V.1.03 Release 00 and V.1.04 Release 00
2. Problems
2.1 With Issuing the chg_pri Service Call
When the chg_pri service call is issued, execution of scheduled tasks
may be retarded, or other symptoms arise.
Conditions:
This problem may occur if the following conditions are all satisfied:
(1) The maximum mutex ID is zero (CFG_MAXMTXID is set to 0
in the configurator).
(2) An interrupt (including the timer interrupt) is requested
during execution of the chg_pri service call.
(3) The interrupt or cyclic handler invoked by the interrupt in (2)
above causes any of the following:
(a) The service call that transitions the task to the READY state
is issued.
(b) The irot_rdq service call is issued.
(c) A task waiting is timed out by a timer interrupt, or the dly_tsk
delay is completed.
2.2 With Issuing the ter_tsk Service Call
When the ter_tsk service call is issued, execution of scheduled tasks
may be retarded, or other symptoms arise.
Conditions:
This problem may occur if the following conditions are all satisfied:
(a) The mutex function is used.
(b) A service call with timeout is issued.
(c) A task exists which waits for the timeout after the mutex
function is locked.
(d) A task exists which waits for the mutex in (c) itself.
(e) The ter_tsk service call is issued to the task in (c), and
during execution of this service call, an interrupt is requested.
(f) A service call that terminates the wait in (c) is issued
during the interrupt handling in (e).
3. Solution
Update yours free of charge to the latest version, HI1000/4 V.1.05
Release 00, which will be released on our Web site on and after
December 5.
For details of the update, see RENESAS TOOL NEWS Document No. 071116/tn2,
"The Real-Time OS--HI1000/4--for the H8SX and H8S MCU Families Revised
to V.1.05 Release 00," published in this series of news on the Web page
at
http://tool-support.renesas.com/eng/toolnews/071116/tn2.htm
(available on and after December 5, 2007).
