QSPI read fail.

[Justin_Yeh]

Hi Sir 

I try to write/read/earse any address with length 32. 

but some bytes shows zero "0x0" when I use , it should be 0xff after erasing...

Do you know what's the problem ? Thanks.

[00:00:30.151,791] <info> app: 0xFF
[00:00:30.151,798] <info> app: 0x0  //??
[00:00:30.151,804] <info> app: 0x0  //??
[00:00:30.151,810] <info> app: 0xFF
[00:00:30.151,816] <info> app: 0xFF
[00:00:30.151,822] <info> app: 0xFF
[00:00:30.151,829] <info> app: 0xFF
[00:00:30.151,835] <info> app: 0xFF
[00:00:30.151,841] <info> app: 0xFF
[00:00:30.151,847] <info> app: 0xFF
[00:00:30.151,856] <info> app: 0xFF
[00:00:30.151,862] <info> app: 0xFF
[00:00:30.151,868] <info> app: 0xFF
[00:00:30.151,874] <info> app: 0xFF
[00:00:30.151,881] <info> app: 0xFF
[00:00:30.151,887] <info> app: 0xFF
[00:00:30.151,893] <info> app: 0xFF
[00:00:30.151,899] <info> app:

[00:00:30.151,905] <info> app: 0xFF
[00:00:30.151,911] <info> app: 0xFF
[00:00:30.151,918] <info> app: 0xFF
[00:00:30.151,924] <info> app: 0xFF
[00:00:30.151,930] <info> app: 0xFF
[00:00:30.151,936] <info> app: 0xFF
[00:00:30.151,943] <info> app: 0xFF
[00:00:30.151,949] <info> app: 0xFF
[00:00:30.151,955] <info> app: 0xFF
[00:00:30.151,961] <info> app: 0xFF
[00:00:30.151,967] <info> app: 0xFF
[00:00:30.151,974] <info> app: 0xFF
[00:00:30.151,980] <info> app: 0x0  //?
[00:00:30.151,986] <info> app: 0x0  //? 
[00:00:30.151,992] <info> app: 0x0  //?

[haakonsh]

We need to verify that the content of the external flash has changed. Can you read out and verify the the content of the external memory with nrfjprog after you have erased it? 

[Justin_Yeh]

Could you teach me how to verify content by nrfprog ? Thanks.

[haakonsh]

By verifying I mean comparing what you read out with nrfjprog with what the uart log prints. 

[Justin_Yeh]

like this ?

nrfjprog.exe --memrd 0 --w 32

0x00000000: 20000400                              |... |

[Justin_Yeh]

I don't sure how to check external flash content by nrfjprog, the read back data look are nrf52840 internal flash content. ??

C:\Program Files (x86)\Nordic Semiconductor\nrf5x\bin>nrfjprog.exe --memrd 0 --n
128
0x00000000: 20000400 00000999 0000062D 00000979 |... ....-...y...|
0x00000010: 00000637 00000641 0000064B 00000000 |7...A...K.......|
0x00000020: 00000000 00000000 00000000 000009BD |................|
0x00000030: 00000655 00000000 0000065F 00000669 |U......._...i...|
0x00000040: 00000673 0000067D 00000687 00000691 |s...}...........|
0x00000050: 0000069B 000006A5 000006AF 000006B9 |................|
0x00000060: 000006C3 000006CD 000006D7 000006E1 |................|
0x00000070: 000006EB 000006F5 000006FF 00000709 |................|

[haakonsh]

See nrfjprog commands.

You can use --memrd to read out the content of the XiP memory region of the external flash, but you will have to use --readqspi if you want to read data stored outside of the XiP memory region. 

[Justin_Yeh]

Hi 

C:\Program Files (x86)\Nordic Semiconductor\nrf5x\bin>nrfjprog.exe --readqspi ./
log
WARNING: An operation that can take up to several minutes is being executed.
WARNING: Please remain patient.
Initializing the QSPI peripheral.
Reading from the QSPI-connected memory.
Uninitializing the QSPI peripheral.
Storing data in './log'.

:020000041200E8
:10000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00
:10001000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0
:10002000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0
:10003000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFD0
:10004000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC0
:10005000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFB0
:10006000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA0
:10007000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF90
:10008000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF80
:10009000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF70
:1000A000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF60
:1000B000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF50
:1000C000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF40
:1000D000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF30
:1000E000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF20
:1000F000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF10
:10010000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
:10011000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEF
:10012000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDF
:10013000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCF
:10014000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBF
:10015000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFAF
:10016000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF9F
:10017000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF8F
:10018000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7F
:10019000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF6F

....

[haakonsh]

This is wierd, do you mind sending me the file you generated? 

Also have you tried to erase the ext flash with --qspieraseall ? 

[Justin_Yeh]

I checked by nrfjprog.exe, read/write always lost the last 3~5 bytes. 

[Justin_Yeh]

I write 0x00, 0x01 ~ 0x1F to address 0 to 31, but it not match to nrfjprog.exe result.

:020000041200E8
:10000000000000000102030405060708090A0B0CA2
:100010000D0E0F101112131415161718191A1B1C98

it should be..

:020000041200E8
:10000000 00~0F
:10001000 10~1F

Do you know why ?

[haakonsh]

I want to replicate your issue on my end. I need a detailed description of your process and the file generated by nrfjprog when reading the ext flash.