PRIGROUP Initialization
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‎2012-01-13 5:56 AM
Posted on January 13, 2012 at 14:56
I can't figure out how the PRIGROUP is initialized in the stm32. In PM0056 (Programming manual) it appears the SCB_AIRCR register field for PRIGROUP is initial 0, but the table defining PRIGROUP (table 45) has no entry for a PRIGROUP = 0b000.
What am I missing ? I'd like to understand the default (i.e. reset) behavior.
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‎2012-01-13 8:05 AM
Posted on January 13, 2012 at 17:05
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0552a/Cihehdge.html
Absent the hardware supporting 8 bits, 0b000 is the equivalent to 0b011 if I'm not mistaken. The STM32 only implements the top 4 bits.
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‎2012-01-13 3:24 PM
Posted on January 14, 2012 at 00:24
In addition to Clive's suggestion, take a look at the comment block in misc.c I found that very helpful in understanding ST's implementation.
