52840 SPI MISO Buffer empty

[Wenne]

Hallo,

I'm using a 52840dongle.

Uart ( PC-Terminal Debugging)

Radio ( reading 51822)

I2C Display

is working well

 No i need to write and read data to/from a spi eeprom.

I am able to write data to the EEprom and read these data from the EEprom ( I can see the correct read out data on the oscilloscope). 

But the receive Buffer m_rx_buf[0],  m_rx_buf[1],  m_rx_buf[2],  m_rx_buf[3],  m_rx_buf[4],  m_rx_buf[5],  m_rx_buf[6],  m_rx_buf[7],  m_rx_buf[8] ... is always 0.

The spim_event_handler  is working well.

maybe the mosi gpi port is not properly set to input ?

I assume that  nrf_gpio_cfg_input(miso_pin, (nrf_gpio_pin_pull_t)NRFX_SPIM_MISO_PULL_CFG); is correct too.

Do you have any idea ?

Best regards Wenne

  

[Wenne]

Good Morning,

I moved miso from 9 to 17.

But unfortunately nothinge has changed - the  m_rx_buf buffer is always "0" too. But I can see the outputdata of the eeprom on my oscilloscope. 

I only changed the #define within the "sdk_config.h" ...

maybe another driver (i2C / Radio / Uart ) blocks thew SDI input ? ...

so I will deactivate all other drivers except the SPI to see if SPI is working stand alone ...

[Jørgen Holmefjord]

That is strange, but the pin could be assigned to another peripheral as you say. 

If you can upload the full project, I can also review it/debug why it does not receive data correctly.

[Wenne]

Hallo,

I tried SPI with uart only - there is the same fault - I'm able to write data to the eeprom, but if i want to read the data back i receive nothing. (the oscilloscope shows that the eeprom is delivering the correct data )

how to upload the full project ?

MfG wenne

[Jørgen Holmefjord]

You can upload the project as a ZIP fil under "Insert->Image/Video/File".

[Wenne]

Hallo,

I'm so stupid - shame on me !!!!

My "Soldering Slave"  soldered the Miso port from pin 9 to pin 24 - but i configured Miso to pin17.

I didn't doublechecked this !!!!

Now I configurated Miso Pin correctly and I'm able to receive the data from the EEprom.

Thank you very much!!!!

You can close this case !

The originally fault was that I used Pin 9 for Miso !!!

best regards Wenne