Kinetis Microcontrollersのトピックlpi2c using LPI2C_MasterTransferNonBlocking for EEPROM

lpi2c using LPI2C_MasterTransferNonBlocking for EEPROM

rs__zen — Thu, 03 Mar 2022 04:37:15 GMT

I'm trying to use EEPROM(24FC64) by using LPI2C_MasterTransferNonBlocking function.

I can write data to EEPROM, but I cannot to access Random Read(pls see attached).

How do you do a dummy write and subsequent read using LPI2C_MasterTransferNonBlocking?

Thank you.

Re: lpi2c using LPI2C_MasterTransferNonBlocking for EEPROM

PabloAvalos — Tue, 15 Mar 2022 00:15:32 GMT

Hi @rs__zen

I would like to apologize for the delay. We are overloaded on the requests these days. I truly appreciate your patience.

Regarding your question, personally I would suggest you to use LPI2C_MasterTransferBlocking, because non-blocking function is going to read/write just one byte every time that it is being called and not the full message that you want to read/write on your EEPROM. It happened to me twice.

Also, can you please explain me what is your intention for doing a dummy write?

I will stay tuned to your answer, please let me know if you have more questions.

Thank you.
Sincerely,
Pablo Avalos.

Re: lpi2c using LPI2C_MasterTransferNonBlocking for EEPROM

rs__zen — Wed, 16 Mar 2022 01:17:41 GMT

Hi PabloAvalos.

Thank you for your answer.

Dummy write means that it is write command without write bytes.

I feel it could be done by setting up the following.

lpi2c_master_transfer_t masterXfer; memset(&masterXfer, 0, sizeof(masterXfer)); uint8_t dummyBuf[1] = {0}; masterXfer.data = dummyBuf; masterXfer.dataSize = 0;

So,I send dummy write command and read command, I could random read access with EEPROM using LPI2C_MasterTransferNonBlocking.

I will ask again if problems arise.

Thank you.

Sincerely,

rs__zen

Re: lpi2c using LPI2C_MasterTransferNonBlocking for EEPROM

PabloAvalos — Wed, 16 Mar 2022 02:01:32 GMT

Hi @rs__zen

Thanks a lot for letting us know with your reply.

If you still require further help, please create a new post refering to this thread. We will be more than glad to help you.

Best Regards.
Pablo Avalos.