SPI doesn't work in nrf52810 while emulating nrf52810 in nrf52832DK was successful

[MnP_Junho]

Our project is to read the gyro (lis3dh) by using SPI communication.

Since the infocenter says that using nrf52832 for developing nrf52810 is okay.

We currently developed codes by using nrf52832DK for nrf52810.

SPI was successful in the emulation and we have tried to transfer the code to the actual nrf52810 chip as the infocenter explained and correcting some bugs

emulating and transferring process:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fnrf52810_user_guide.html&cp=4_0_0_5_0

correcting bugs: SPIM0 peripheral

https://devzone.nordicsemi.com/f/nordic-q-a/35145/crashing-during-the-spi-transfer-on-nrf52810

We thought that mapping the pins would be enough but it was not.

In emulation, reading the sensor was successful but in the actual nrf52810 environment, SPI reads only '0xff'

For double checking, blinking LED and BLE NUS was successful but the spi communication was failed.

How can we solve this problem?

Does the transferring procedure has some bug?

[MnP_Junho]

I already used the breakpoints but couldn't find anything..

I edited the source code.

Using oscilloscope may give me some breakthroughs.

I will reply later.

My concern is that bugs exist in the SDK 15.0

[MnP_Junho]

These are capture of osciloscope of nrf53820

SCK and CS:

we used nrf_gpio_pin_set and nrf_gpio_pin_clear to handle the cs 

SCK and MOSI : 

We send the read command (0x8f and 0xff) but there is no response from the sensor

These are signals of nrf52810 emulation

SCK and MISO (successful to read 0x33)

SCK and MOSI (sending 0x8f and 0xff)

Even if the same source code, there are some difference in SCK signal

I can't understand how to deal with it 

[awneil]

Plug a USB stick in here:

and get proper screenshots from the scope!

[MnP_Junho]

IN nrf52810 emulation on nrf52832DK

SCK and MOSI (sending 0x8f and 0xff)

SCK and MISO (successful to read 0x33)

In actual nrf52810

SCK and MOSI (sending 0x8f and 0xff)

there are a gap between sending 0x8f and 0xff

mosi signal sending 0x8f for 8 clocks are shown below

 

SCK and MISO

there are no response from the sensor

[awneil]

That's so much clearer - isn't it?!

Does your scope really only have 2 channels? Would be a lot easier to have SCK, MOSI, and MISO all together on the same screen!

So your transmission looks OK, although the nRF52810 is adding a big gap between to 2 bytes. That shouldn't matter.

But the MISO is not working in the nRF52810 case - it looks like something is pulling it down to ground?

I seem to remember there was another thread recently with a similar problem ... ?

Check your hardware.

Try disconnecting MISO from the nRF52810, and measure at the Slave.

Do the same with the nRF52832, for comparison.