Device tree setting problem

[yithwe]

Hi 

　　Ｉam use nRF7002-DK, SDK v2.5.2, I try to set high seed SPI as master and connect with BMP280 sensor,I generate overay file for spi4 connect BMP280 sensor,for this resource in nrf5340_cpuapp_common.dts connect mx25r64 NOR flash first, as below picture, can I coonect two resource on this SPI4 or remove this NOR flash to other SPI resouce?If connect two on same SPI or remove the NOR falsh to other SPI resource, what the side effect happen for change setting? 

Best Regards

      Tina

[Simonr]

Hi

Note that there are some specific pins dedicated for high-speed SPI4 (P0.08-P0.12). By default, these are connected to the Flash memory on the nRF7002DK, so you will need to short SB11-SB14 to have these pins available for your sensor when using the DK. Note that this will leave the MX25 disconnected though so it won't be usable unless you get inventive with soldering it onto some other pins on the DK.

Best regards,

Simon

[yithwe]

Hi Simon

               Ｉshort SB11-SB14 and I use https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-5-serial-peripheral-interface-spi/topic/exercise-1-10/ sample code :Interfacing with a sensor over SPI, for connect ST:LIS2HH12 sensor, after I write register and print the registers in main, the result is as below, isn't normal?

[00:00:00.300,811] <inf> Lesson5_Exercise1: bmp_print_registers: Reading all BME280 registers (one by one)
[00:00:00.300,872] <inf> Lesson5_Exercise1: Reg[0x0f] = 0xff
[00:00:00.321,044] <inf> Lesson5_Exercise1: Reg[0x1e] = 0xff
[00:00:00.341,186] <inf> Lesson5_Exercise1: Reg[0x1f] = 0xff
[00:00:00.361,328] <inf> Lesson5_Exercise1: Reg[0x20] = 0xff
[00:00:00.381,469] <inf> Lesson5_Exercise1: Reg[0x21] = 0xff
[00:00:00.401,611] <inf> Lesson5_Exercise1: Reg[0x22] = 0xff
[00:00:00.421,752] <inf> Lesson5_Exercise1: Reg[0x23] = 0xff
[00:00:00.441,894] <inf> Lesson5_Exercise1: Reg[0x24] = 0xff
[00:00:00.462,036] <inf> Lesson5_Exercise1: Reg[0x25] = 0xff
[00:00:00.482,177] <inf> Lesson5_Exercise1: Reg[0x26] = 0xff
[00:00:00.502,349] <inf> Lesson5_Exercise1: Reg[0x27] = 0xff
[00:00:00.522,491] <inf> Lesson5_Exercise1: Reg[0x28] = 0xff
[00:00:00.542,633] <inf> Lesson5_Exercise1: Reg[0x26] = 0xff
[00:00:00.562,774] <inf> Lesson5_Exercise1: Reg[0x27] = 0xff
[00:00:00.582,916] <inf> Lesson5_Exercise1: Reg[0x28] = 0xff
[00:00:00.603,057] <inf> Lesson5_Exercise1: Reg[0x29] = 0xff
[00:00:00.623,199] <inf> Lesson5_Exercise1: Reg[0x2a] = 0xff
[00:00:00.643,341] <inf> Lesson5_Exercise1: Reg[0x2b] = 0x00
[00:00:00.663,482] <inf> Lesson5_Exercise1: Reg[0x2c] = 0x00
[00:00:00.683,624] <inf> Lesson5_Exercise1: Reg[0x2d] = 0x00
[00:00:00.703,796] <inf> Lesson5_Exercise1: Reg[0x2e] = 0x00

Best Regards

     Tina