Example for Internal Flash Read and Write

Ali Anjum53

Intellectual 360 points

Hi,

Is there any example code available for reading and writing in the internal flash of Tm4C controllers?

If yes then please share the link.

Thanks,

Ali

over 9 years ago

0 Amit Ashara over 9 years ago

TI__Guru**** 244440 points

Hello Ali

There is no example code, but for write you can use the Flash API's in flash.c

For reading the flash, it is a direct access to the location using HWREG define in hw_types.h

0 Ali Anjum53 over 9 years ago in reply to Amit Ashara

Intellectual 360 points

Hi Amit,

Thank you for the prompt response.

I did saw the API's in flash.c. However in the API's I couldn't find the detailed flash settings as described in datasheet such as the settings for "Memory Timing Parameter Register 0 for main flash and EEPROM (MEMTIM0)" etc.

Does the application is supposed to set these registers before using the API's?

Thanks Again,
Ali

0 Bruno Saraiva over 9 years ago in reply to Ali Anjum53

Guru 13040 points

	for(i=0; i < CodeSize; i+=FlashBlockSize)
	{
		FlashProtectSet(BackupAddress+i,FlashReadWrite);
		FlashErase(BackupAddress+i);
		if(FlashProgram((uint32_t*)(CurrentAddress+i), BackupAddress+i, FlashBlockSize) == 0) {	blocks++;	}
		//FlashProtectSet(BackupAddress+i,FlashReadOnly);
	}

Hello Ali,

We have some heavy flash copying in one of our codes here, which we use to manage firmware updates. On the flash part, simple things like the snippet above work. I don't see any other initialization in our code...

0 Ali Anjum53 over 9 years ago in reply to Bruno Saraiva

Intellectual 360 points

Thanks Bruno.

It is very helpful.

Kind Regards,
Ali

0 Amit Ashara over 9 years ago in reply to Ali Anjum53

TI__Guru**** 244440 points

Hello Ali,

The timing is already configured when the System clock is configured using the API SysCtlClockFreqSet. So there is no additional configuration that needs to be performed.

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Example for Internal Flash Read and Write