MK64 Program FLASH

DINGii — Thu, 27 Jun 2024 03:04:08 GMT

Question 1:

Hi, I use MK64FX512, now I want to divide the program space into two blocks, the first block is located in 0x00-0x2ffff, the second block is located in 0x3000-0x80000, jump from the first block to the second block with the following program:

typedef void (*iapfun) (void);

iapfun jump2app;

void msrmsp (unsigned int addr)

{

__asm volatile (

"MSR MSP, r0 n"

"BX r14 n"

);

}

void iap_load_app (unsigned int appxaddr)

{

unsigned long tmp;

tmp = (*(volatile unsigned int *)appxaddr) & 0x2ff00000;

tmp = tmp;

if (tmp == 0x20000000) {

jump2app = (iapfun)*(volatile unsigned int *)(appxaddr + 4);

msrmsp (*(volatile unsigned int *)appxaddr);

jump2app();

}

Call iap_load_app (0x3000), 0x3000 already have a program, the above program is no problem to use in M4 of ST and TI, but the program of the 0x3000 cannot be run in MK64.

Question 2:

CAN THE PROGRAM RUN 0x10000000 SECOND FLASH?

Re: MK64 Program FLASH

Alice_Yang — Mon, 01 Jul 2024 10:43:55 GMT

Hello @DINGii

I recommend you refer to the jump code in

https://community.nxp.com/t5/Kinetis-Microcontrollers/Kinetis-Bootloader-to-Update-Multiple-Devices-in-a-Network-for/ta-p/1119638

void JumpToUserApplication(LWord userSP, LWord userStartup)
{
volatile LWord avoid_optimization;
avoid_optimization = userSP; //In order to avoid optimization issue when -Os
avoid_optimization = userStartup; //In order to avoid optimization issue when -Os

// set up stack pointer
__asm("msr msp, r0");
__asm("msr psp, r0");

// Jump to PC (r1)
__asm("mov pc, r1");
}

Alice

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