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VF6xx QSPI write using eDMA

Question asked by Nilesh Gujarathi on Apr 19, 2018
Latest reply on May 1, 2018 by UK_CF_FAE

Processor :



Task :

1. Write external flash chip through QSPI

2. Need to transmit 512 Bytes, for one selecton of LUT sequence, so need to keep loading Tx buffer as and when the data gets pushed out of the QSPI lines.


Problem :

1. Is it possible to use eDMA to transfer data to Tx buffer of QSPI.

2. How eDMA will get to know Tx buffer full information from QSPI so that it will wait till there is empty place in Tx buffer.