C6A816x EVM: Nothing comes out from the UART (p10) port after power on.

Mark Wills

Hi,

I have a C6A816x/AM389X EVM, I connected a serial cable between the P10 UART port and my pc, then powered on the evm, but there was nothing come out from the UART port.

If I connect the serial cable to P7, Power Monitor UART, I can see some data printed out, like:

!Power Monitor       0001016mV         0266000uA
#U14 (0V9)           0000912mV        0009000uA
#U11 (1V8 A)         0001804mV         0014000uA
#U7 (1V8 B)         0001812mV         0011000uA
#U59 (VTT/1V5 ALT)   0001500mV         0010800uA
#U22 (3V3)           0003352mV         0216000uA
#U17 (5V0)           0004984mV         0620000uA
#U42 (1V5)           0001804mV         0154400uA
#U23 (1V0 AVS)       0001036mV         0961200uA
#U18 (1V0 CON)       0001016mV         0253600uA
#Expansion 1         0000000mV         0000000uA

I followed the C6A816x_AM389x_EVM_Quick_start_guide to set some switchs on the EMV:

SW3 (bootmode): BTM0=ON, BTM1=ON, BTM2=ON, BTM3=OFF, BTM4=ON.

SW4: NAND=OFF, SPI=OFF

Is anybody know what's going on? and also for SW3, how can I change it to boot from tftp/nfs mode?

Thanks!

Mike

over 14 years ago

0 Vaibhav Bedia over 14 years ago

TI__Expert 5290 points

Mike,

The switch settings that you have mentioned is meant for SD boot mode. Have you copied the MLO and u-boot.bin files to a freshly formatted SD card?

When the U-Boot binaries from the SD card are loaded you can use tftp to transfer the kernel image to RAM and then boot using NFS . This wont require any changes in the switch settings.

Regards,

Vaibhav

0 Mark Wills over 14 years ago in reply to Vaibhav Bedia

Prodigy 60 points

Hi Vaibhav,

Thanks, I didn't find the SD card in the EVM package, I will find one to test it with your suggestion.

So, if there is no SD card inserted into the EVM, it is normal that no message comes out from the serial port, right? As there is no U-Boot loaded yet.

Regards,

Mike

0 Vaibhav Bedia over 14 years ago in reply to Mark Wills

TI__Expert 5290 points

Yes. Unless U-Boot is loaded from SD or from some other media like NAND/SPI flash no messages are displayed.

Regards,

Vaibhav

0 Mark Wills over 14 years ago in reply to Vaibhav Bedia

Prodigy 60 points

Hi Vaibhav,

I copied the MLO and u-boot.bin to a SD card, and inserted the SD card to the EVM, but I still didn't see anything from the serial terminal.

I am sure the serial cable and terminal are ok, the SD card is freshly formatted (tried both FAT32 and FAT).

What's wrong with the EVM board?

Mark

0 Vaibhav Bedia over 14 years ago in reply to Mark Wills

TI__Expert 5290 points

Mark,

There might be an issue with the formatting of the card. Can you try formatting with the HP USB DIsk Storage Format tool if you are using Windows for formatting the SD card. Please ensure that MLO is the first file that is copied on the card.

If you still have an issue can you upload the MLO and u-boot.bin? I can try it out at my end.

Regards,

Vaibhav

0 Mark Wills over 14 years ago in reply to Vaibhav Bedia

Prodigy 60 points

Hi Vaibhav,

I followed your instruction to format the SD card and copy the files, but it is still same.

I attached the MLO and u-boot.bin, you can try it.

0160.MLO_uboot.zip

Thanks!

Mark

0 Vaibhav Bedia over 14 years ago in reply to Mark Wills

TI__Expert 5290 points

Mark,

The files that you uploaded work fine on the setup i have.

Just to double-check: are all the switches configured as shown in Fig.1 and 2 of the quick start guide http://software-dl.ti.com/dsps/dsps_public_sw/ezsdk/latest/exports/C6A816x_AM389x_EVM_Quick_start_guide.pdf

Does pressing the reset button SW6 for a short duration after powering on the board help?

If not, you could try flashing U-Boot to NAND or SPI using CCS.

Regards,

Vaibhav

0 Mark Wills over 14 years ago in reply to Vaibhav Bedia

Prodigy 60 points

Hi Vaibhav,

Sorry, I was out of office, and couldn't access the EVM until now.

I verified the switches and the reset button, but it didn't work still.

I am going to try to flash the u-boot into NAND, do you have a document about the procedure to use CCS flashing u-boot into NAND? (I found some articles about how to flash DaVinci or BeagleBoard, but I hope you can have a detailed instruction on Netra)

Regards,

Mark

0 David Meixner over 14 years ago in reply to Mark Wills

TI__Expert 4010 points

Mark Wills said:
do you have a document about the procedure to use CCS flashing u-boot into NAND?

I believe the instructions are in the psp/doc directory of the EZSDK install. The "TI816X-PSP-FlashingTools.pdf" is the one you're looking for.

Regards,
David

0 Mark Wills over 14 years ago in reply to David Meixner

Prodigy 60 points

Hi David,

Thanks, I found the document, will follow it to flash the NAND.

Regards,

Marks

0 Michael Dean over 14 years ago in reply to Mark Wills

Prodigy 50 points

Mark, I am having this same exact issue. Did you ever reach a solution?

Thanks, Michael

0 Nageswari Srinivasan over 14 years ago in reply to Michael Dean

TI__Expert 5660 points

Hi,

Can you share your board revision information and also whether it is DDR2 or DDR3 board?

Regards,

Nageswari

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C6A816x EVM: Nothing comes out from the UART (p10) port after power on.