Layerscape中的主题 Re: LS1043a-RGW Debug Uboot Console Port Input.

LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Tue, 07 Apr 2020 21:43:07 GMT

Hi,

I am bringing up custom LS1043a-RGW board and in u-boot- I see

serial output, but I have not been able to get serial Input...

1) Is there any configuration option that makes it impossible?

2) My hardware engineer swears the input is coming to edge of board.

3) It looks like it is using DUART1 - and I've gone through the NS16550_init() - where it is pointing at

this device. Although I'm confused that it is configuring registers and such, but when I look at

those peripheral registers in CodeWarrior - the values aren't there?

4) I am wondering what ISR is reading this register and how I can instrument it to prove that

interrupts are occurring for inbound data?

5) I am looking at the polling loop from u-boot (tstc()) waiting for console input, and that is NOT set.

But, again, when I dump the rest of registers, it seems that it is NOT initialized?

See attached dump from CodeWarrior Peripheral Registers for DUART1:

Thanks in advance.

Tom

Re: LS1043a-RGW Debug Uboot Console Port Input.

ufedor — Wed, 08 Apr 2020 02:05:35 GMT

Please provide:

1) U-Boot booting log

2) the processor connection schematics as searchable PDF

Re: LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Wed, 08 Apr 2020 02:13:32 GMT

see attached log.

Not sure I can provide schematics...the ones I have are non-searchable.

and the entire schematic is proprietary.

Let me see what I can "snip out" and give you from the edge to the CPU.

Tom

Re: LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Wed, 08 Apr 2020 02:29:07 GMT

Here is a image of the part of schematic. It goes straight from the connector to the cpu...

Re: LS1043a-RGW Debug Uboot Console Port Input.

ufedor — Wed, 08 Apr 2020 02:42:41 GMT

Please provide a digital scope trace showing behaviour of all UART1 signals.

Re: LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Wed, 08 Apr 2020 19:13:01 GMT

that will be tomorrow morning to get the trace.

when talking to the hardware engineer, he indicated that only TX and rx were connected. is there any concern with floating pins(even when the uart should be configured to ignore those?

Re: LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Thu, 09 Apr 2020 12:21:41 GMT

Here is a capture of input - I think it is hitting enter!

Re: LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Thu, 09 Apr 2020 12:27:11 GMT

correction the character was "A"

Re: LS1043a-RGW Debug Uboot Console Port Input.

ufedor — Thu, 09 Apr 2020 13:32:19 GMT

Was the trace captured right at the processor's pin?

How many boards were tested?

Is DVDD=3.3V?

Please provide raw memory dump of the UART1 CCSR registers.

Re: LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Thu, 09 Apr 2020 14:45:46 GMT

We have no "via" to probe at the ls1043a. It was done at the connector.

Attached is the register dump

Re: LS1043a-RGW Debug Uboot Console Port Input.

ufedor — Thu, 09 Apr 2020 14:48:35 GMT

How many boards were tested?

Is DVDD=3.3V?

Example of raw memory dump (required similar for the UART CCSR memory area):

fe008000: 000000ff 00000000 0200023f 00000000 ...........?....
fe008010: 00000000 00000000 00000000 00000000 ................

Re: LS1043a-RGW Debug Uboot Console Port Input.

tmorrison — Wed, 15 Apr 2020 16:45:39 GMT

We got some new boards in - and the problem seems to have been our hardware - thank you for all the help!