Kinetis MicrocontrollersのトピックRe: Reading from Nand Flash in TWRK70F120M

Reading from Nand Flash in TWRK70F120M

snehahegde — Fri, 08 Aug 2014 12:32:19 GMT

Hi Team,

I have a set of below parameters which I am saving into the respective blocks:

Parameter1 : Block 0

Parameter 2: Block 1 to Block 6

Parameter 3: Block 111

Parameter 4: Block 156 into Block 161

The problem I am facing here is that only when I save the parameters starting from the 4th to 1st, I am able to read them correctly on start up, else it fails to read the parameters. Please suggest the probable reason and the way this problem could be solved.

Thanks and Regards,

Sneha Hegde

Re: Reading from Nand Flash in TWRK70F120M

Hui_Ma — Mon, 11 Aug 2014 08:24:01 GMT

Do you refer Freescale provides NFC demo for TWR-K70F120M board? The demo could be found at below link:

KINETIS_120MHZ_SC : Kinetis 120MHz bare metal sample code

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=TWR-K70F120M&fpsp=1&tab=Design_Tools_Tab

If it is available, could you post your NFC related code here? I could do a test on my site.

Wish it helps.
best regards
Ma Hui

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Re: Reading from Nand Flash in TWRK70F120M

snehahegde — Mon, 11 Aug 2014 11:49:33 GMT

Hi,

Thanks for your reply. I implemented my code using the sample code given. PFB the code which I have used to open the Nand Flash.

OOL CFlashMemory::OpenFlashMemory(void)

{

intinstall_unexpected_isr();

BOOL bStatus=FALSE;

char_ptr name="nandflash:";

mpFlashPtr=NULL;

mpFlashPtr=fopen(name,NULL);

if(mpFlashPtr!=NULL)

{

//Erasing the chip before writing

//if(MQX_OK == ioctl(mpFlashPtr, NANDFLASH_IOCTL_ERASE_CHIP,NULL))

//return;

bStatus=TRUE;

m_dwBlockSize=GetBlockSize();

m_dwVirtPageSize=GetVirtPageSize();

m_dwNumOfVirtPagesPerBlock=m_dwBlockSize/m_dwVirtPageSize;

}

return bStatus;

Please let me know if I am missing out on anything. Also I would like to know if I should call the install driver function before opening the Nand Flash.

Thanks and Regards,

Sneha