Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Allwinner/D1H/EMAC/EMAC_TX_CTL0#0x0
TX_EN=Disable, TX_FRM_LEN_CTL=B2048
EMAC Transmit Control Register0
Frame Transmit Length Control
0 (B2048): undefined
1 (B16384): undefined
Enable Transmitter
0 (Disable): undefined
1 (Enable): undefined
https://github.com/cmsis-svd/cmsis-svd-data