Hi, cortex-debug is very nice and I am grateful to the committers.

I'm working on a C ++ STM32 project and when I try to use the SVD used by svd2rust, it fails to load.

I used stm32f401.svd.patched, the error message is:

Unable to parse SVD file: Error: Invalid derivedFrom = HSIRDYR for enumeratedValues of field PLLI2SRDY

This SVD contains a enumeratedValues field that ST's SVD does not have.
I thought that the cause of the error was probably that enumeratedValues deriveFrom was a forward reference, so I changed the order of the SVD description so that the definition of enumeratedValues comes first, and now it can be loaded.

↓This is the error location in the SVD file and cannot be loaded.↓

<field>
  <name>HSERDY</name>
  ...
<enumeratedValues derivedFrom="HSIRDYR"/>
</field>
<field>
  <name>HSIRDY</name>
  ...
<enumeratedValues><name>HSIRDYR</name><usage>read</usage><enumeratedValue><name>NotReady</name><description>Clock not ready</description><value>0</value></enumeratedValue><enumeratedValue><name>Ready</name><description>Clock ready</description><value>1</value></enumeratedValue></enumeratedValues>
</field>

But when I changed the order of the definitions of "HSIRDYR", it worked.

<field>
  <name>HSERDY</name>
  ...
<enumeratedValues><name>HSIRDYR</name><usage>read</usage><enumeratedValue><name>NotReady</name><description>Clock not ready</description><value>0</value></enumeratedValue><enumeratedValue><name>Ready</name><description>Clock ready</description><value>1</value></enumeratedValue></enumeratedValues>
</field>
<field>
  <name>HSIRDY</name>
  ...
<enumeratedValues derivedFrom="HSIRDYR"/>
</field>

There were a lot of points that were similarly forward-referenced, and all had to be reordered.

However, since svd2rust already has some similar SVDs, it would be nice to be able to handle them without changing the SVD.