EMAC descriptor or buffer data flush.

Question

H sir/Madam, 
 
 I am using SC594 SOM module with EV-SOMCRR-EZKIT board, trying to implement to read and write operation with EMACPhyLoopback. 
 after reading old data i want to flush descriptor and buffer data ( emac_data_tx.data or emac_data_rx & emac_desc_rx[desc_cnt].Buffer1, emac_desc_tx[desc_cnt].Buffer1). 
 can you please let me know how to reset the buffers and descriptor. 
 
 Regards 
 Mothilal.

NandiniC · Accepted Answer

Hi Mothilal, 
 We understand that after reading the received Ethernet data from the RX buffers and descriptors (emac_data_rx and emac_desc_rx), you want to flush or reset the descriptors and buffer memory so they can be safely reused for the next packets. Similarly, after transmission, you want to reset the TX buffers and descriptors (emac_data_tx and emac_desc_tx). 
 Specifically, you're asking how to properly clear status bits, set or clear ownership bits, and whether it's necessary to clear the buffer data itself. 
 Please confirm if this understanding is correct. Are you seeing any specific problems or errors related to buffer or descriptor management, such as stale data? Also, are you using the loopback example exactly as provided, or have you changed it to communicate between EMAC0 and EMAC1(or vice versa) instead of using loopback mode? 
 Regards, Nandini C)

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EMAC descriptor or buffer data flush.

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