What's different between ble_app_template & ble_app_uart

[Aku]

Hi,

I was developing my customer board with nrf52832,and started with ble_app_uart .

I added SPI flash with sck 3, miso 1,mosi 0,ss 2  and it works fine.

but now i restart with ble_app_template because someone suggests me to use customer service

so i follow the tutorial https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-services-a-beginners-tutorial and it works fine(in both sdk15.0 and sdk15.3)

but when i add spi code, the timer will become very very slow(about 100times),and the spi connection fail.

I found the problem unexpectedly: MY MISO is pin1

when i change it to other pin ,my timer recover

I noticed that pin1 is XL1,but i had successed with ble_app_uart

I'm wondering what is going on,and is there any solution

thanks

[Hakon]

Hello,

can you please do a logic trace of the different SPI pins in the different cases?

[Aku]

HI,

thank you for reply

I layout a new board with spi pins 5 6 7 8 and change config to internal rtc ,now it works fine

and i think the problem is that i was not using internal rtc in my ble_app_template,

also i dont have external oscillator  on my custom board,so maybe the pin0 pin1 conflict?