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TWR-LS1021A : U-boot console prompt not shown in LPUART mode

Question asked by srikanthkrishnakar on Jan 30, 2015
Latest reply on Feb 5, 2015 by Yiping Wang

Hi All,

 

H/W: LS1021ATWR

SDK: v1.7

 

I have flashed the u-boot-ls1021atwr-lpuart.bin & rcw_1000_lpuart.bin to "BANK1" successfully ! But I am unable to get the u-boot console prompt since it is switching to HDMI by default, which shows u-boot console prompt on HDMI monitor rather than minicom. Even before setting video arguments ! Am I missing some thing ? Any hints are really appreciated.

 

LPUART U-boot from Bank1:


---------------------------------------------------------------------------------------------

=> tftp 81000000 u-boot_lpuart.bin

eTSEC1 Waiting for PHY auto negotiation to complete......... TIMEOUT !

eTSEC1: No link.

Speed: 100, full duplex

Using eTSEC2 device

TFTP from server 10.20.0.1; our IP address is 10.20.0.2

Filename 'u-boot.bin'.

Load address: 0x81000000

Loading: ##########################

         1.7 MiB/s

done

Bytes transferred = 368336 (59ed0 hex)

=> tftp 82000000 rcw_1000.bin

Speed: 100, full duplex

Using eTSEC2 device

TFTP from server 10.20.0.1; our IP address is 10.20.0.2

Filename 'rcw_1000_lpuart.bin'.

Load address: 0x82000000

Loading: #

         58.6 KiB/s

done

Bytes transferred = 120 (78 hex)

=> protect off all;erase 63f80000 63ffffff;cp.b 81000000 63f80000 80000

Un-Protect Flash Bank # 1

 

.... done

Erased 4 sectors

Copy to Flash... 9....8....7....6....5....4....3....2....1....done

=> protect off all;erase 64000000 6401ffff;cp.b 82000000 64000000 100

Un-Protect Flash Bank # 1

 

. done

Erased 1 sectors

Copy to Flash... 9done

=> reset

resetting ...

-----------------------------------------------------------------------------------

 

LPUART U-boot:

----------------------------------------------------------------------------------

U-Boot 2014.07-sdk-v1.7.x+g659b6a2 (Jan 30 2015 - 15:41:45)

 

CPU:   Freescale LayerScape LS1021E, Version: 1.0, (0x87081110)

Clock Configuration:

       CPU0(ARMV7):1000 MHz,

       Bus:300  MHz, DDR:800  MHz (1600 MT/s data rate),

Reset Configuration Word (RCW):

       00000000: 0608000a 00000000 00000000 00000000

       00000010: 20000000 00407900 e0025a00 21046000

       00000020: 00000000 00000000 00000000 08038000

       00000030: 00080000 881b7340 00000000 00000000

Board: LS1021ATWR

CPLD:  V2.3

PCBA:  V4.0

VBank: 1

I2C:   ready

DRAM:  1 GiB

Using SERDES1 Protocol: 32 (0x20)

Firmware 'Microcode version 0.0.1 for LS1021a r1.0' for 1021 V1.0

QE: uploading microcode 'Microcode for LS1021a r1.0' version 0.0.1

Flash: 128 MiB

MMC:   FSL_SDHC: 0

EEPROM: CRC mismatch (89eb7bdd != ffffffff)

DCU: Switching to HDMI monitor @ 640x480

In:    serial

Out:   vga

Err:   vga

 

<<<<< NO U-boot prompt // u-boot prompt is shown on HDMI monitor if connected.

-----------------------------------------------------------------------------------

 

Where do I need to make the change to get the u-boot prompt on minicom.. in LPUART mode ?

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