LDMA descriptor and transfer configuration

07/204/2016 | 10:49 PM

Question

When setting up LDMA in ping pong mode, where do the descriptors and transfer configuration structures need to be allocated?

Answer

The LDMA will access these structures when one of the ping pong buffers is full. Therefore if they were initialized on the stack of a function that has returned (such as an init function), the LDMA will stop. To prevent this, declare the structures as global, or static variables.

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LDMA descriptor and transfer configuration

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