[U-Boot-Users] Problems using UART1 instead of UART0

[Liew Tsi Chung-r5aahp]

Bob,

To try the extra uart on M5329EVB, connect pin 78 uart1 rx and pin 77 uart1 tx, or pin 73 uart2 tx and pin 74 uar2 rx at J38. The signal is only TTL, you will need a transceiver to have it working.

As for your custom board, you might need to check your RCON configuration. It could have the RCON set at default value or other than value specified in M5329EVB.h. Try to use oscope to check on the pin 24 of BDM header first to find out the CPU clock speed. Then use that freq to calculate your bus clock. The uart baud rate is based on the bus clock. If the bus freq increase or descrease ~4Mhz, it will affect the baudrate output.

Regards,
TsiChung

-----Original Message-----
From: Bob Grimes [mailto:rsg.uboot at gmail.com] 
Sent: Thursday, August 23, 2007 7:21 PM
To: Das U-Boot Mailing List; Liew Tsi Chung-r5aahp
Subject: Problems using UART1 instead of UART0

Hi,

I finally got our custom board, and unfortunately, the hardware guy seemed to have missed the message, and he's assigned the second
mcf5329 uart to the console!  Argh!

So I've tried changing CFG_UART_PORT from (0) to (1), but nothing seems to happen.  I've traced into some of the code, and have confirmed that the associated pins have been properly assigned to UART1.  I'm having trouble determining anything more than that; specifically, I've yet to find the serial init code, as it seems to hang when setting the cpu clock speed.  Probably not too surprising I can't debug through that code, but it doesn't seem to make it through.

Tsi Chung, have you tried this?

Back to the debugger, and code inspecting...

Thanks,
-Bob