topic Flash AT45DB interfaing with KW41z in Wireless MCU

Flash AT45DB interfaing with KW41z

abhitippanna — Tue, 12 Mar 2019 10:07:13 GMT

Hiii ,

I am using AT45DB041E flash which are available on FRDM-KW41Z evaluation borad ,

Interfacing of AT45DB041E using SPI communication , using this Read Manufacturer ID and Device ID successfully , but for read data it always read FF or 00

unsigned char RdFlashByte(unsigned int BuffAddr)
{
unsigned char rddata = 0 ;
unsigned char t1[5]={0};

PRINTF("\nRdFlashByte\r\n");

while(!FlashReadBusy()); //wait if device is busy

t1[0] = BUFFER_1_READ; //or 0xD1
t1[1] = 0x00;
t1[2] = ((unsigned char)(BuffAddr>>8));
t1[3] = ((unsigned char)(BuffAddr));
t1[4] = 0x00;

isTransferCompleted = false ;

dspi_transfer_t masterXfer;

masterXfer.txData = &t1[0] ;
masterXfer.rxData = NULL ;
masterXfer.dataSize = 5 ;
masterXfer.configFlags = kDSPI_MasterCtar1 | EXAMPLE_DSPI_MASTER_PCS_FOR_TRANSFER | kDSPI_MasterPcsContinuous;

DSPI_MasterTransferNonBlocking(EXAMPLE_DSPI_MASTER_BASEADDR, &g_m_handle, &masterXfer);

/* Wait transfer complete */
while (!isTransferCompleted)
{
}

/* Delay to wait slave is ready */
for (i = 0; i < EXAMPLE_DSPI_DEALY_COUNT; i++)
{
__NOP();
}

isTransferCompleted = false ;

masterXfer.txData = NULL ;
masterXfer.rxData = &rddata ;
masterXfer.dataSize = 1 ;
masterXfer.configFlags = kDSPI_MasterCtar1 | EXAMPLE_DSPI_MASTER_PCS_FOR_TRANSFER | kDSPI_MasterActiveAfterTransfer;

DSPI_MasterTransferNonBlocking(EXAMPLE_DSPI_MASTER_BASEADDR, &g_m_handle, &masterXfer);

/* Wait transfer complete */
while (!isTransferCompleted)
{
}

/* Delay to wait slave is ready */
for (i = 0; i < EXAMPLE_DSPI_DEALY_COUNT; i++)
{
__NOP();
}

PRINTF("\n Rx data :%d \r\n,",rddata);

return rddata;

} //End of RdFlashByte Function

please give some idea.

Re: Flash AT45DB interfaing with KW41z

stephanie_m — Tue, 12 Mar 2019 18:45:56 GMT

Hello,

Are you basing it on an example? If you are, could you please let me know if you are, could you please give me more details about it?

Also, are you having some kind of fault? Or is it just that it is not reading the correct value?

Regards,

Estephania

Re: Flash AT45DB interfaing with KW41z

abhitippanna — Wed, 13 Mar 2019 05:55:05 GMT

No fault or error observed in code , Writing flash page 0 and reading same page but it always read 00 or FF data ...

Any additional setting required to use AT45DB041E flash

Re: Flash AT45DB interfaing with KW41z

stephanie_m — Thu, 14 Mar 2019 17:39:45 GMT

Hello,

As I do not have the same memory as you do, I'm limited to the capabilities of the device and my available resources which are from NXP and our developments boards.

How are you confirming that you are reading and writing correctly form the memory? Are you checking the registers with the received data?

Regards,

Estephania