topic Re: why I can't run the application through the application start application? in MPC5xxx

why I can't run the application through the application start application?

1329306846 — Thu, 22 Mar 2018 12:29:05 GMT

Hello everyone !

Rencently I‘m learning Bootloader ， when I run the bootlaoder and have download the other application，

I want to run the other application ，but I can't realize it.

Bootlaoder Lcf :

Application Lcf

And t I use "app_entry (); " to change bootlaoder to application :

#define APP_StartAddr (*(uint32_t*)0x00004004)

void app_entry(void)
{
(*(void (*)(void))(APP_StartAddr))(); /*run the function via function pointer convert with a certain address*/

while(1); /*stop here for anyhow*/
}

Really hope someone can give me some help !

Re: why I can't run the application through the application start application?

rachedguerafi — Thu, 22 Mar 2018 13:33:12 GMT

Maybe you should change the address to 0x4000 instead of 0x4004
If that didn't work for you then this should do the job:

First define a typedef for the app_entry function as follows:

typedef void (* TAppEntry)(void);

Then you just have to declare the app_entry of that type and set the address value
TAppEntry app_entry = (TAppEntry) (*((unsigned int *) 0x00004004));

and then call the function simply
app_entry();

Re: why I can't run the application through the application start application?

1329306846 — Sat, 24 Mar 2018 13:48:57 GMT

Thank you for your answer. I have realized run application through application start address in MCU " MPC5744P "by

the way as you tell me . But I do not realize it in the MCU "MPC5634m" ，when Bootloader run "app_entry()" , the MCU is reset.

Do you know whether mpc56xx can change into other application through application start address when Bootloader is running ?

Re: why I can't run the application through the application start application?

tony_huang — Tue, 27 Mar 2018 03:12:17 GMT

Hi,

Can I make friend with you? I recently use MPC5744P to develop bootloader. My qq:1931181009.