CodeWarrior for MCUのトピックData in DFLASH

Data in DFLASH

bengtandersson — Thu, 18 May 2017 07:50:38 GMT

Hi!

I'm planning to put some data in the dflash of SPC5602B and for that reason creating some variables with addresses starting from 0x00800000.

I have created a new memory area in the LCF:

dFlash_sector0: org = 0x00800000, len = 0x00004000

and created a section:

GROUP : {

.__DflashStorage : {}

} > dFlash_sector0

in .c file:

#pragma push /* Save the current state */

#pragma section const_type ".__DflashStorage"

__declspec(section ".__DflashStorage") char my_data;

char my_data;

#pragma pop

When trying to compile this I get the error :

section '.__DflashStorage' must have an uninitialized data section for object 'nodeIdDflash'

I don't know if I have done a minor error or if the approach is totally wrong.

Best Regards

Bengt Andersson

Re: Data in DFLASH

stanish — Wed, 24 May 2017 08:11:04 GMT

Hello Bengt

Your approach is right, but please try to adjust your pragma section to include also uninitialized consts and small consts too. I also removed __declspec since if there is #pragma section const_type... it's not needed.

#pragma push /* Save the current state */

#pragma section const_type sconst_type ".__DflashStorage" ".__DflashStorage"

char my_data;

#pragma pop

hope it helps!

Stan

Re: Data in DFLASH

bengtandersson — Thu, 14 Dec 2017 13:02:50 GMT

Hi Stan!

I have finally had some time to try this fix. I works but only almost. It compiles and links without problems but at __init_data() in __start.c it tries to copy data from address 0xC000 to my address in DFLASH which is impossible and I think this is the reason why my application finally craches. If I could find a way to avoid this copying I think it will work. Any suggestions??

Best Regards

Bengt Andersson