Writing in CC2540 non volatile memory

Fred Visticot

Expert 1120 points

I need to save data in non volatile memory.

It seems that I need to use the HalFlashWrite and HalFlashRead functions.

My questions are regarding flash page number and offset of the read method.

How to get those value?

Why flash number and offset are not required for the HalFlashWrite function ?

In my example bellow, I try to write 6 bytes to address 0X2A80, what are the page and offset I need to use in the HalFlashRead function ?

//to write

uint8 temp[6] = {0x61,0x62,0x63,0x64,0x65,0x66};
HalFlashWrite(0x2A80,temp ,2);

//to read
uint8 readBuffer[8];
HalFlashRead(?, ?, readBuffer, 2);

over 13 years ago

0 Fred Visticot over 13 years ago

Expert 1120 points

Can someone provide some help on the topic.

To elaborate the use case:

I need to store some profile configuration parameters set by the user.

Is there any sample code available implementing that ?

0 Fred Visticot over 13 years ago in reply to Fred Visticot

Expert 1120 points

Any support ?

Please advice.

0 Richard Dolf over 13 years ago in reply to Fred Visticot

Expert 2170 points

In your example, the address 0x2A80 passed to HalFlashWrite() corresponds to flash address 0xAA00 which corresponds to page #21 decimal, offset 512 (decimal).

You might consider using the osal_snv functions for saving configuration parameters, much easier to use.

0 Fred Visticot over 13 years ago in reply to Richard Dolf

Expert 1120 points

Tx a lot for this useful answer !!!

- Can you please detail how you are computing the page number and offset ?

- Can you please explain why osal_snv functions are much easier and (if possible) provide me a link or a sample code ?

- Fred

0 Richard Dolf over 13 years ago in reply to Fred Visticot

Expert 2170 points

osal_snv is easier because it manages the details of flash hardware for you. If you still want to use the hal functions, suggest you read the relevant portions of the User's Guide SWRU191C, especially sections on memory map and flash controller. Osal_snv.c provides an example of how to use the hal functions.

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Writing in CC2540 non volatile memory