SPRUJB6B November 2024 – May 2025 AM2612
FIFO loopback mode is entered when the LOOPBACK bit in the CPSW_CONTROL_REG register is set. FIFO loopback mode causes packets received on a port to be turned around and transmitted back on the same port. Port 0 receive is fixed on channel 0 in FIFO loopback mode. The RXSOFOVERRUN statistic is incremented for each packet sent in FIFO loopback mode. Packets sent in with errors are returned with errors (they are not dropped). FIFO loopback is intended as a simple mechanism for test purposes. FIFO loopback should be performed in fullduplex mode only (CPSW_PN_MAC_CONTROL_REG[0] FULLDUPLEX = 1h).