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Discussion Groups | 68HC12 | 812A4 losses all interrupts
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
812A4 losses all interrupts - mas - Jun 6 5:54:00 2002
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Hello 812A4 users,
In our 812A4 MCU based wireless system, we are using
SCI0,SCI1,TOF(Timer Overflow) and RTI interrupts.Prescaler for TOF is kept 32, RTI comes
every 4.096ms. SCI0 interrupts comes most frequently and SCI1 interrupt in enabled but not
used at present. In above configuration, MCU losses the all interrupt handling during the
run time of our application.
I have checked the value of registers but they are not
changed or garbased.
Please anybody can show the solution - why MCU losses the
all interrupts.
Regards,
Mansukh Sheliya
Amtel security systems Inc.
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Re: 812A4 losses all interrupts - Gilles Blanquin - Jun 6 5:57:00 2002
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Hi. Maybe something stupid but did you care about the watchdog and possible eeprom relocated at default position in $F000-FFFF by chip reset and covering your vectors? Regards, Gilles At 12:54 PM 6/6/2002, you wrote: Hello 812A4 users, In our 812A4 MCU based wireless system, we are using SCI0,SCI1,TOF(Timer Overflow) and RTI interrupts.Prescaler for TOF is kept 32, RTI comes every 4.096ms. SCI0 interrupts comes most frequently and SCI1 interrupt in enabled but not used at present. In above configuration, MCU losses the all interrupt handling during the run time of our application. I have checked the value of registers but they are not changed or garbased. Please anybody can show the solution - why MCU losses the all interrupts. Regards, Mansukh Sheliya Amtel security systems Inc. -------------------------------------------------------- To unsubscribe from this group, send an email to: 6...@yahoogroups.com To learn more about Motorola Microcontrollers, please visit http://www.motorola.com/mcu Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: 812A4 losses all interrupts - mas - Jun 6 6:13:00 2002
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Hi Gilles,
I have checked with watchdog also but MCU losses all
interrupts. When I disable RTI interrupt, it works fine. I am using MCU in normal expanded
wide mode so interrupt vector table in in external flash(Hex 3ffce - unpaged area).
I hope it makes more sense...
Regards,
Mansukh
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