SPI Can't Work in FRDM-KL25Z

[bhavinmaru]

Hello,

I am working with FRDM-KL25Z EVM with this evm i interfaced M95M02-DR EEPROM using SPI communication.for your reference i have attached my code for this EEPROM.i send a data using SPI but when i read the data from the address in which i have written data i am not getting that data which i have written insted i am getting data 0x00 only.i also observe the waveforms of CLOCK,CS,MOSI,MISO.CS,CLOCK and MOSI these three waveforms are correct but i am not getting any pulse in MISO pin.please see my code and suggest me what mistake i have done so that i can read the data.

Any help in this will be appreciated more.

Thank You

  Bhavin

Original Attachment has been moved to: main.c.zip

[kerryzhou]

Hi Bhavin Maru,

    From your description, the MISO pin don't have data, it means your slave didn't respond the master.

   You should check your external M95M02-DR, whether the external circuit is correct or not, and also check the M95M02-DR  datasheet, check the read waveform, did this chip have the dummy read? Whether your read waveform is meet the M95M02-DR demand.

Wish it helps you!

Have a great day,
Kerry

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[bhavinmaru]

Hello,

Is there any update on this issue?

Any help in this will be appreciated more.