Re: [ECOS] GDBstub porting for vrc4375

[Jonathan Larmour <jlarmour at redhat dot com>]

Ling Su wrote:
> 
> 
> <1>. After try to burn code into EPROM and test it on board for lots of
> times, I began to use PMON to debug my GDB stub in RAM startup. I disabled
> MMU, Cache. But I found there are some conflicts when the GDB stub and PMON
> try to access serial port together, so the program usually dead in trying to
> write char to serial port. I am not sure if there is any method I can slove
> this? I hope I can use another serial port to connect with GDB in this
> debugging session, is that possible? there are two ports on the board. But I
> am not sure to avoid the PMON and the monitor to access the serial port
> simutenously.

You could try changing CYGHWR_HAL_MIPS_VR4300_VRC4373_GDB_PORT in your
configuration.

> <2>. There are a 7-segment display on board, according to the document the
> address is 0x7c000000, I am trying to write to the address after system
> initialization, but it doesn't work. Anything wrong?

Maybe PMON doesn't set up the MMU mappings for that?

Jifl
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