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[ARMv7] Exception Priorities?

Note: This was originally posted on 14th June 2011 at http://forums.arm.com

Hi,

I see registers PRIn (starting from E000E400) are registers for changing priorities of external interrupts. But, after searched over my manuals, I have not found what are registers for changing priorities for system exceptions (no.1 -- no.15). Could someone tell me?

Thanks in advance.
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narke

Woody Wu over 12 years ago

Note: This was originally posted on 14th June 2011 at http://forums.arm.com

Hi,

I see registers PRIn (starting from E000E400) are registers for changing priorities of external interrupts. But, after searched over my manuals, I have not found what are registers for changing priorities for system exceptions (no.1 -- no.15). Could someone tell me?

Thanks in advance.
-
narke

Sorry, I mean No.4 - No.15 since No.1 to No.3 have fixed priorities.
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Woody Wu over 12 years ago

Note: This was originally posted on 14th June 2011 at http://forums.arm.com

Sorry, I mean No.4 - No.15 since No.1 to No.3 have fixed priorities.

Okay, I found the answer: they are SHPR[1-3] registers.
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Joseph Yiu over 12 years ago

Note: This was originally posted on 14th June 2011 at http://forums.arm.com

The Cortex-M3 generic user guide should be able to help:
http://infocenter.arm.com/help/topic/com.arm.doc.dui0552a/DUI0552A_cortex_m3_dgug.pdf
(section 4.3.8 System Handler Priority Registers)

regards,
Joseph
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