Is it possible to compile const array data into flash, not on SRAM?

antoniohsu888 — Mon, 04 Jul 2022 10:57:11 GMT

I am using RT1060 EVKB.

I have some mp3 files which transformed to c header file.

Here is the example:

static unsigned char __20_mp3[] = {
0x49, 0x44, 0x33, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x23, 0x54, 0x53,
0x53, 0x45, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x03, 0x4c, 0x61, 0x76,

...

};

and I build it with MCUXpresso,

looks like the data array is on SRAM memory and it is out of SRAM size.

Memory region Used Size Region Size %age Used
BOARD_FLASH: 1683764 B 8 MB 20.07%
SRAM_DTC: 235296 B 128 KB 179.52%
SRAM_ITC: 29568 B 128 KB 22.56%
SRAM_OC: 751648 B 768 KB 95.58%
BOARD_SDRAM: 0 GB 30 MB 0.00%
NCACHE_REGION: 0 GB 2 MB 0.00%
collect2.exe: error: ld returned 1 exit status

How can I put the mp3 .h files into flash, not on the SRAM?

Which is the easy way to implement it?

Via compiler or need to use flash tool to bun in mp3 files into flash and load in code ?

Thanks you.

Re: Is it possible to compile const array data into flash, not on SRAM?

antoniohsu888 — Mon, 04 Jul 2022 14:23:21 GMT

looks like add const is OK.

const unsigned char __20_mp3[]

Re: Is it possible to compile const array data into flash, not on SRAM?

kerryzhou — Tue, 05 Jul 2022 03:09:25 GMT

Hi @antoniohsu888 ,

Yes, you are right, just use the constant, it will help you to assign to the flash range directly.

So, you can use your const array.

Wish it helps you!

Best Regards,

kerry

i.MX RT Crossover MCUsのトピックIs it possible to compile const array data into flash, not on SRAM?

Is it possible to compile const array data into flash, not on SRAM?

Re: Is it possible to compile const array data into flash, not on SRAM?

Re: Is it possible to compile const array data into flash, not on SRAM?