Tool/software: Code Composer Studio
we are using TMS570LC4357's MDIO Moudel control ETH PHY, now we met issue:
MDIO Moudel can't read ID of PHY.
by oscilloscope, we can confirm below items:
- test waveform of MDC, it match the configuration by software.
- please check the waveform of MDIO, the front half is the wave we sent to read PHY's register, the after half is the return of PHY. the wave sequence is: high->start(01)->read(10)->PHY addr(5bit as software configured)->Regaddr(5bit as software configured)->Tz->16bit data(PHY ID)
- from 1 and 2, we can know the peripheral circuit of PHY is working correct, data send from MDIO Moudel to PHY by software is OK too.
- but MDIO Moudel read/get 0x0000 always
please help us to check this issue.
