[U-Boot-Users] serial does not work

Travis Sawyer tsawyer+u-boot at sandburst.com
Tue Aug 31 17:08:14 CEST 2004

On Tue, 2004-08-31 at 05:31, 刘勇 wrote:
>    my card use powerpc 440gx, i use u-boot OCOTEA board.
> when i arrive the prompt "=>", i can input no char.
> at last i find that cpu always loops in the function of 
> serial_getc() whatever i press any button. i have no error.
> cpu-->ppc4xx-->serial.c
> 	status = in8 (ACTING_UART0_BASE + UART_LSR);
> 		if ((status & asyncLSRDataReady1) != 0x0) {
> 			break;
> 		}
>     the result of (status & asyncLSRDataReady1) always is zero.
>     i do not know why.

What communications settings are you using?  Ensure flow control is set
to NONE.

Please read the DULG.

Stock 'out-of-the-box' u-boot on the ocotea should be:
	115200,None,8,1, No flow control


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