Goodmorning,
I 'm using SMIF interface to control an external hyperlfash S26KL512 with HyperBus protocol.
I'm using the SDL 7.2.0 and I selected 'tviic2d4m' family. There is a document that mentions an issue present in the SDL about firmware control of Hyperflash and Hyperflash.
I used code examples from SDL with commom and specific files.
I'm able to write and read external memory (only in MMIO mode) but with some important issues.
Basically I have 4 problems discovered:
1) Abnormal necessary resetting of the SMIF module: After 7 Hyperbus transations SMIF module goes in busy state and stops to work. Essentialy for example on Reading operation, after Dummy bytes no more clocks are sent so the RWDS is not received and the SMIF module goes in busy state. I resolve temporarily by "DeInit" and "Init" the SMIF module periodically.
2) Wrong Read Byte: "ReadMMIO" is working but with a problem; The first byte of the buffer of "uint16_t" (half-word) I read is always wrong. The second byte of the first half-word is correct as other halfwords.
Initilly ReadMMIO didn't work and after I change an instruction on "Cy_SMIF_ReceiveDataBlocking" function and now works with this issue ( .fieldRxCount.dataNum = (uint32_t)(rxUnitNum), // - 1U), ).
3) Huge delays between transaction: I'm able to see signals between Traveo 2G and hyperflash. The single clock of hyperbus is at 32 MHz but I see sent clocks and after I see interruptions of clock that continues subsequently after some microseconds, also 20 microseconds of delay. Impossible to accept such kind of delays.
4)
Xip module doesn't work. I see signals between hyperflash and MCU but on Write operation no correct cmd/data are sent and in Read operation no more clocks are sent after dummy bytes and moduls goes in busy state.
Could you help me?
Thank you in advance.
