AM2432: PRU-ICSSG: What is the unit of data size in which CRC errors are performed?

hiroyasu-shimizu

Part Number: AM2432

CRCエラー検出は、どのタイミングで実行されるのでしょうか。

現在、コントローラから"PayLoad=1032バイト"のデータ、デバイスから"PayLoad=192"のデータの送受信を考えていますが、
両データともに「RX L1 FIFO」及び「RX L2 FIFO」のサイズ以上になります。
その為、専用領域が必要なのかを判断したいです。

over 2 years ago

0 Ming Wei over 2 years ago

TI__Guru 54795 points

Hiroyasu-san,

Can you translate this post into English?

Best regards,

Ming

0 hiroyasu-shimizu over 2 years ago

Intellectual 490 points

When is CRC error detection executed?

I'm thinking of sending and receiving "PayLoad = 1032 bytes" data from the controller and "PayLoad = 192" data from the device.
Both data are larger than the size of "RX L1 FIFO" and "RX L2 FIFO", so I would like to determine whether a dedicated area is required.

0 Tsurumoto over 2 years ago in reply to hiroyasu-shimizu

TI__Genius 15234 points

Hi Sanjeev

Please let me know your latest situation for this question? I need your reply soon.

0 PratheeshGangadhar over 1 year ago in reply to Tsurumoto

TI__Mastermind 47531 points

CRC error check performed post seeing RX_EOF (RX_DV de-assertion for MII and equivalent for RGMII). This is a HW feature for CRC-32 polynomial used by Etherrnet.

Yes - of course you need to accumulate packet payload bytes in either OCRAM or ICSS DMEM/SMEM/BSRAM in this case. You may use SBxO instruction or XFR2VBUS WR DMA widget for this purpose,

0 hiroyasu-shimizu over 1 year ago

Intellectual 490 points

［日本語］
受信したパケットデータは、PreambleからFCSまでの全てを蓄積する必要がありますか。

［English］
Is it necessary to store all received packet data from Preamble to FCS?

+1 PratheeshGangadhar over 1 year ago in reply to hiroyasu-shimizu

TI__Mastermind 47531 points

hiroyasu-shimizu said:
Is it necessary to store all received packet data from Preamble to FCS?

HW CRC computation is excluding 8 preamble bytes. Whether to store preamble and/or FCS is dependent on end use case

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AM2432: PRU-ICSSG: What is the unit of data size in which CRC errors are performed?