QSPI example read giving 0x88 when working with soft device on custom development board

[bysun13in]

When I run the QSPI example in SDK, it can work well both  on the PCA10056 and my custom development board. However, when I transfer the example to app_buttonless_dfu, the program can only read and write data in the plug-in flash on PCA10056, while the custom development board cannot work properly.  What points should be paid attention to during the migration process?  Does the softdevice matter?  

Use the flash of the same model .

00> <info> app: QSPI write and read example using 24bit addressing mode
00> 
00> <info> app: QSPI example started.
00> 
00> <info> app: Process of erasing first block start
00> 
00> <info> app: Process of writing data start
00> 
00> <info> app: Data read
00> 
00> <info> app:  00 00 00 00 00 00 00 00|........
00> 
00> <info> app:  00 00 00 00 00 00 00 00|........
00> 
00> <info> app:  00 00 00 00 00 00 00 00|........
00> 
00> <info> app:  00 00 00 00 00 00 00 00|........
00> 
00> <info> app:  00 00 00 00 00 00 00 00|........
00> 
00> <info> app:  00 00 00 00 00 00 00 00|........

[Sigurd]

Hi, 

the program can only read and write data in the plug-in flash on PCA10056, while the custom development board cannot work properly.

1) Do you use the same type of flash chip that is on the PCA10056 on the custom board as well?

2) Have you checked that you are using the correct GPIO pins? The pin mapping is maybe different on the custom board?

[bysun13in]

Hi,Sigurd.

I have solved the problem because I used pin P0.18 as the CS pin, which is the default restart pin .