On Okt 05 2021, Heinrich Schuchardt wrote:
Before the 'boot' command the communication via TFTP seems to work fine.
The init command can identify which file exists on the TFTP server.
The boot command calls ShutDown() and Stop() on the SNP protocol and
closes it. And then tries to open it again for the LOAD_FILE2 protocol.
The question remains why the protocol cannot be reopened. It is unclear
if this is a GRUB or a U-Boot issue.
The strange thing is that the first two packets+ACK still get through.
Maybe related to the size of the following DATA packet?