Knowledge Base Article

What does bit 7 of the Scatter Gather DMA descriptor status field indicate?

Description

I noticed while simulating the SGDMA, bit 7 of the descriptor status field was being updated to a '1'. The Embedded Periperals IP User Guide defines the 8 bits of the descriptor status as an error field. What error is indicated by bit 7?

In a stream to memory configuration if bytes to transfer is set to 0, a transfer will continue until an end of packet is recieved. Bit 7 of the SGDMA descriptor status field is updated indicating that an end of packet was received during the processing of this descriptor.

Updated 2 months ago
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