CCS/AM5716: Processor SDK Serial Flash not working

Hi Masashi,

Please check the supported Sitara platforms for the Uniflash tool. UART mode is not supported on AM571x IDK, you may try the JTAG mode instead.

Regards,
Garrett

Garrett-san,

Thank you for your reply.

I would like to confirm what you said JTAG mode. Does it mean using JTAG interface described "3.5.1.6.2 Loading Flash Writer over JTAG interface"?

If yes, my customer downloaded Flash Writer program via JTAG and saw the code on CCS. 

Could you please tell us what we should check any other points? We would like to know whether the flash erase is completed or not in this situation though displaying "Read Filure!!"

Best Regards,

Masa

.  

Hi Masa,

Yes, the customer need follow the procedure described "3.5.1.6.2 Loading Flash Writer over JTAG interface

>>C:\ti\uniflash_5.0.0> .\dslite.bat --mode processors -c COM14 -e 10000 -d 2 -o 2000

The COM14 indicates this is a UART interface.

And the JITAG interface command is:

dslite.bat --mode load --config=<Path_to_ccxml_file> -f <Path_to_the_flash_writer_to_be_transfered> -n <core_to_be_connected_on_the_target_platform>

Regards,
Garrett

Garrett-san,

Thank you for your reply.

I understood loading Flash Writer over JTAG interface. And I have a question about erasing flash memory.

It seems to be described only UART mode in "3.5.1.9. Erasing Flash Device on the Target Platform".

    # cd <path_to_the_uniflash>

    #dslite.bat --mode processors -c ,COM_Port> -e <Erase_Length_in_bytes> -d <device_type> -o <Erase_Offset>

    Example:

    #dslite.bat --mode processors -c COM7 -e 10000 -d 1 -o 20000

I think we cannot erase flash memory if AM571x support only JTAG mode and the flash erasing is only support UART mode.

Is my understanding correct?

If yes, could you please tell us how to erase flash memory in case of AM571x.

Best Regards,

Masa

Hi Masa,

Is the customer testing the Uniflash on TI AM571x IDK or their own board?

If they have used the JTAG mode to successfully load and run the flash writer, then to erase flash memory, the procedure is as described in "3.5.1.9. Erasing Flash Device on the Target Platform".

Below is what I captured on AM572x IDK with flash writer from PRSDK v6.0.

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

 c:\ti\uniflash_5.0.0>.\dslite.bat --mode processors -c COM24 -e 10000 -d 2 -o 20000
Executing the following command:
> c:\ti\uniflash_5.0.0\processors\ProcessorSDKSerialFlash.exe -c COM24 -e 10000 -d 2 -o 20000

For more details and examples, please refer to the UniFlash Quick Start guide.


----------------------------------------------------------------------------
ProcessorSDKSerialFlash CLI Tool
Copyright (C) 2017-2019 Texas Instruments Incorporated - http://www.ti.com/
Version 1.0.0.6
----------------------------------------------------------------------------
Erasing Flash....

Transferring Header information..
Header Transfer Complete!!
Flash Erase Success!

Regards,

Garrett

Hi Garrett-san,

They are testing it on their own board.

They tired to download FlashWriter described as "3.5.1.6.2 Loading Flash Writer over JTAG interface" and then erased flash memory as "3.5.1.9. Erasing Flash Device on the Target Platform". They got same error message, "Read Failure!!". 

They analyzed the source code of UniFlash(ProcessorSDKSerialFlash) and  FlashWriter, and they found suspicious place.

There is the code of waiting ACK from FlashWriter in xmodemHTransfer() of ProcessorSDKSerialFlash.cpp. In case the timing of sending ACK from FlashWriter is later than waiting ACK in UniFlash, it seems "SerialPort::getArray() doesn't have error process for it. So they think the process is not good after it.　In other words, they think below process in yellow highlight doesn't do correct process. (Please see attached file.)

/cfs-file/__key/communityserver-discussions-components-files/791/Sequence.xlsx 

The customer would like TI to provide Uniflash correcting this issue. We would appreciate it if you would send us the execution file.

Best Regards,

 Masa.O

No.	PC side: UniFlash(ProcessorSDKSerialFlash)		No.	Board side: FlashWriter
1	Open RS232C port		1	Initialize
2	Read 'C' from RS232C port (Wait input from FlashWriter)		2	Write 'C' UART(RS232C)
3	Write command+CRC(13bytes) to RS232C port		3	Wait input from from UART
4	Wait ACK(0x06) from FlashWriter		4	Read command+CRC(13bytes) from UART
5	Read ACK from FlashWriter		5	Write ACK to UART
6	Write EOT(0x04) to RS232C port		6	Wait EOT from UART
7	Wait ACK from FlashWriter		7	Read EOT from UART
8	Read ACK from FlashWriter		8	Write ACK to UART
9	Wait flash erasing process from FlashWriter		9	Initialize flash
10			10	Flash erasing
11			11	Close flash
12	Read flash erasing process from FlashWriter		12	Write result of flash erasing(0x2A/0x2B) to UART
13	Write ACK to RS232C port		13	Wait ACK from UART
14	Cloase RS232C port		14	Read ACK from UART
15	end		15	Wait input from UART