nRF52832 external SPI flash pin select

[Aku]

HI,

i have made 3 customer board

they all use the same spi flash mx25v8006e

and the first two board have the spi pin :              sck 3, miso 1,mosi 0,ss 2

but i change the design in the third board to         sck 8, miso 5,mosi 7,ss 6

my code works fine on the first two board, i can get device id 0xC22014 when i send 0x9F by SPI

but when i use the same code only change the SPI pin number at sdk_config.h on the third board , i however receive 0

is that cause by the pin change?

i'm using SDK15.2 and the spi example by segger

thanks

[Kenneth]

If you flip over an nRF52-DK you can see the default connection and usage for GPIO's, for instance pins 5-6-7-8 are by default setup to be used as UART pins. Likely you have exported your project from the nRF52-DK, and these pins are still assigned to be UART pins.

Best regards,
Kenneth

[Aku]

thank, i flipped over my DK and see

and  follow https://devzone.nordicsemi.com/f/nordic-q-a/55367/disable-uart-of-nrf52

after disable all  uart-relateds in the sdk_config.h and Exclude nrf_drv_uart.c from build it works

but now i want to use uart for other function 

I change the HCI_UART_ PINS in sdk_config.h and also PIN_NUMBERs in pca10040.h 

but my spi dont work this time

do you know how to change the default uart pins?

[Kenneth]

Typically this is in the board file (boards.h), in your case I expect you can find it in pca10040.h.

Kenneth

[Aku]

Hi,

I change the default pins(8675-->3102) in pca10040.h

but my spi still cant work