[microblaze-uclinux] uart issue in "fs-boot" - ML505

["Tyler Q. Nguyen" <tyler@xxxxxxxxxxxxx>]

Hi all,
I'm experiencing an issue with loading the U-BOOT SREC file over  
serial to FS-BOOT. I see FS-BOOT outputs on the kermit console and it  
just hangs waiting for the SREC even long after "cat /tftpboot/u-boot- 
s.srec > /dev/ttyS0" returns.
I then looked at FS-BOOT code and insert debug messages inside of  
"get_ch" routine to figure out what kind of data FS-BOOT is getting  
and noticed that the function XUartLite_mIsReceiveEmpty(UART_BASEADDR)  
is always false, even if I don't send anything to the board from the  
host, hinting that there's always data in the receive buffer and these  
characters are always FFFFFF.....

So it seems like the setting is incorrect somewhere since the while  
loop is not working. Has anybody came across this behavior?

char get_ch(void) {
  while (XUartLite_mIsReceiveEmpty(UART_BASEADDR)) ;
.......
}

Thanks
Tyler
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