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ERROR: Could not stop the processor after reset

Started by montrealcc, February 26, 2019, 06:55:35 PM

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montrealcc

Dear all,

I am using TE0722 with Zynq-7010. I have a problem with it and I kindly request your assistance. Below are the details.

I have a reference hardware design from Trenz. I modify the hardware according to my needs and export the bitstream to SDK. Then I create an FSBL application project with TE-Modification, create a boot image and program the flash of TE0722. Since now, I have not needed to change or add my own code to the FSBL application project. But I now needed a design with AXI-GPIO's which requires to be driven by the processor. So, after I generated the bitstream and exported it to SDK, created the FSBL application project with TE-Modification as previous, but also I added couple of lines (about driving AXI GPIO interfaces) to the main function in main.c. I created the boot image and programmed the flash. However, although the flash operation was successful, after restart of the board I realized that the flash is not programmed since the red LED is illuminating instead of the bright white one. So I re-tried to program the flash but I continuously get the error below:

****** Xilinx Program Flash
****** Program Flash v2015.4 (64-bit)
  **** SW Build 1412921 on Wed Nov 18 09:43:45 MST 2015
    ** Copyright 1986-2015 Xilinx, Inc. All Rights Reserved.

Connecting to hw_server @ TCP:127.0.0.1:3121

Connected to hw_server @ TCP:127.0.0.1:3121
Available targets and devices:
Target 0 : jsn-JTAG-ONB4-2516330023AEA
       Device 0: jsn-JTAG-ONB4-2516330023AEA-4ba00477-0

JTAG chain configuration
--------------------------------------------------
Device   ID Code        IR Length    Part Name
1       4ba00477           4        arm_dap
2       13722093           6        xc7z010

--------------------------------------------------
Enabling extended memory access checks for Zynq.
Writes to reserved memory are not permitted and reads return 0.
To disable this feature, run "debugconfig -memory_access_check disable".

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

CortexA9 Processor Configuration
-------------------------------------
Version.............................0x00000003
User ID.............................0x00000000
No of PC Breakpoints................6
No of Addr/Data Watchpoints.........4
WARNING: Could not stop the processor before reset

ERROR(1):
       Could not stop the processor after reset




It seems I somehow put the board in a fault state which I do not know how to recover. Moreover, even I try to load the flash with previous working projects' bin files, I still get the same fault above. Apparently, the AXI GPIO additions to the main.c file caused a problem in the hardware of the board.

Can you please help me to recover the board and explain how and where should I add my own code to main.c or some other file of FSBL application with TE modification. I can provide additional files/screenshots if needed.

Best regards,

Baris

Oleksandr Kiyenko

#1
Hello,
you have chosen the wrong place for your code. At this point, not all system components and probably PL are initialized.
Please move your code to fsbl_hooks.c to the end of u32 FsblHookBeforeHandoff(void) function, it's a safe place to execute user code.

Best regards
Oleksandr Kiyenko

montrealcc

Hi Oleksandr,

Thank you for the reply, I will try. However, I have another problem before I can do that, which is the Could not stop the processor after reset error I got when I try to program the flash again (details in my previous post). How can I recover the board?

Best,

Baris

montrealcc

I found the recovery procedure in the link below. That worked.

https://wiki.trenz-electronic.de/display/PD/TE0722-Recovery

Thank you again for quick reply,

Baris