[En-Nut-Discussion] Problems with simple RTL8019 driver in eboot

[Christian.Schilmoeller at camco.de]

Hello Ethernut community,

I'am currently trying to implement a bootloader as alternative for "eboot" 
in the ethernut 1.3 board.
I'm using also TFTP, but compared to eboot, roles of client and server are 
swapped.
This makes some things simpler, e. g. a TFTP *client* is shipped with 
Windows XP, no need to install TFTP32 or something similar. No need to 
supply the DHCP server with a "boot file" information, I have no access to 
that server in the company network anyway.

The TFTP protocol is already working fine, but for testing I write the 
accepted files to /dev/null. Therefore I get high data rates (about 340 
kb/s).
But I noticed that the ethernet packet reception routine is unreliable in 
that case and sometimes hangs the board. This seems to happen when a 
broadcast packet is received shortly after a normal packet. Then the 
normal packet is received over and over again. But it is no packet 
overflow, the corresponding bit in the ISR register is not set!

I compared the simple RTL8019 routines to the real ones in Nut/OS. Except 
that in my application everything works completely unbuffered and without 
interrupts, the differences I've found are few.
Any hints or ideas are appreciated!

Regards,

Christian

P.S.: Provided I can solve the problems and someone is interested, I will 
post my bootloader to the community, of course!