Does BootLoader have to run in RAM For SPC5XXX?

[guo qiang]

Posted on September 23, 2017 at 09:29

I have a board of SPC560B. I need to make a BootLoader.

I want to do that:

the JMP_ADDRESS is 0x40000

PowerON--> running BootLoader at 0x000000 in flash.--->delay 3000ms-->if （update cmd ==false）-----> 

(*(

AppFunctionType

)(

JMP_ADDRESS

+

8

))();

//

jump

to

app

and

should

not

back

Is that ok?

Why do all people develop BootLoader in RAM for MPC5XXX?

Can't BootLoader be run in Flash for SPC5XXX/MPC5XXXX?

[guo qiang]

Posted on September 25, 2017 at 02:47

Yvin.Erwan

‌

[procolo]

Posted on September 25, 2017 at 10:51

Hi,

you can create a bootloader in flash. Check out this post and related spc5studio projects attached.

https://community.st.com/0D50X00009Xkeh4SAB

Regards,

Procolo

[guo qiang]

Posted on September 25, 2017 at 11:13

My APP address is 0x18000, i did test.

if i wrote:

e_lis% r3, HI (0x00018000)

e_or2i% r3, LO (0x00018000)

mtctr% r3

se_bctrl

Jump failed.

I must write:

e_lis% r3, HI (0x00018008)

e_or2i% r3, LO (0x00018008)

mtctr% r3

se_bctrl

Jump success, MCU can be executed to the APP main function, but the implementation of abnormal ....

Please tell me, before jumping program, how should I do?

My bootloader Jump code:

//irqIsrDisable();

//can_lld_stop(&CAND1);

CAN_0.MCR.B.MDIS = 1; // disable FlexCAN

//can_lld_stop(&CAND2);

CAN_1.MCR.B.MDIS = 1;

//can_lld_stop(&CAND3);

CAN_2.MCR.B.MDIS = 1;

// PIT.PITMCR.B.MDIS = 1; /* PIT clock Disabled. */

//SPCSetPeripheralClockMode(SPC5_PIT_PCTL, SPC5_PIT_STOP_PCTL);

//INTC.MCR.B.HVEN = 1;

SPCSetRunMode(SPC5_RUNMODE_DRUN);

(*(AppFunctionType)(JMP_ADDRESS+8))();

But it is not working good...

[procolo]

Posted on September 26, 2017 at 16:01

Hello, these funcion are used in a bootloader of another platform but should be ok also for yours

void StopPeripherals(void) {

/*Stop STM */

stm_lld_stop(&STMD1);

/*Stop System Timer*/

SPCSetPeripheralClockMode(SPC5_PIT_PCTL, SPC5_PIT_STOP_PCTL);

/* Disable Interrupt */

irqIsrDisable();

}

void SetDRUNMode(void) {

ME.DRUN.R = (0UL | SPC5_ME_MC_MVRON | SPC5_ME_MC_DFLAON_NORMAL | SPC5_ME_MC_CFLAON_NORMAL | SPC5_ME_MC_IRCON | SPC5_ME_MC_SYSCLK_IRC);

if (SPCSetRunMode(SPC5_RUNMODE_DRUN) == CLOCK_FAILED) {

pal_lld_togglepad(PORT_A, Led_D11);

SPC5_CLOCK_FAILURE_HOOK();

}

}

void JumpMain(void) {

/* Branch to the main application.*/

asm volatile ('e_lis %r3, 0x00010008@h \t\n'

'e_or2i %r3, 0x00010008@l \t\n'

'mtctr %r3 \t\n'

'se_bctrl');

}

Order is 

 - StopPeripherals

-

SetDRUNMode

- JumpMain

most important is to stop the PIT clock which runs by default and to disable irq before jump.

Also set DRUN with the configuration set in ME.DRUN.R 

Regards,

Procolo

[guo qiang]

Posted on September 28, 2017 at 03:46

ok! Thank you  ,i will  try it!