5746R-144pin can not start

[changchen]

hi all,

I download the source code into the EVB ,but the code is not be excused ,and it can not reach the main() at all, how can I solve this  problem ?

thank you!

[martin_kovar]

Hi,

could you please share the project you loaded to MPC5746R and describe you problem in detail?

Without the knowledge of the code and with your general description, I am not able to tell you, what is wrong. It could be million reasons, why your code does not run correct.

Regards,

Martin

[changchen]

Firstly Thanks for your answer. Today I found that  when I add the code 'SIUL2.MSCR0_255[61].B.SSS=0;   SIUL2.MSCR0_255[61].B.ODC=2;
 SIUL2.GPDO[61].R=0;  '  the code would not be excused. if I delete these code  .the code could be excused normally.

int main(void)
{
volatile int counter = 0;

xcptn_xmpl (); /* Configure and Enable Interrupts */

MC_ME.RUN_PC[0].B.DRUN = 1; //Enable DRUN mode for all peripherals using ME_RUN_PC[0]

// SIUL2.MSCR0_255[61].B.SSS=0;
// SIUL2.MSCR0_255[61].B.ODC=2;
// SIUL2.GPDO[61].R=0;

/* Loop forever */
for(;;) {
counter++;
}

[stanish]

Hello Chang,

You are probably using older version of the tools - v1.0.

This issue (ENGR00374776) has been addressed in the version 1.1. The project has enabled -fstrict-volatile-bitfields by default. It causes that the compiler generates 32-bit store even if you access it this way:

SIUL2.MSCR_IO[0].B.ODC = 0x2;
14: 71 40 60 00 e_li r10,-262144
18: 51 2a 02 40 e_lwz r9,576(r10)
1c: 71 00 00 02 e_li r8,2
20: 75 09 c1 4e e_rlwimi r9,r8,24,5,7
24: 55 2a 02 40 e_stw r9,576(r10)
SIUL2.MSCR_IO[0].B.SSS = 0x2;
28: 71 40 60 00 e_li r10,-262144
2c: 51 2a 02 40 e_lwz r9,576(r10)
30: 71 00 00 02 e_li r8,2
34: 75 09 06 3e e_rlwimi r9,r8,0,24,31
38: 55 2a 02 40 e_stw r9,576(r10)

Therefore I'd strongly recommend you to use the latest version of the tools + update:

https://community.nxp.com/docs/DOC-332005 

NEW S32 Design Studio for Power v1.1 - Update 1 available 

Stan

[changchen]

thank you very much

[martin_kovar]

Hi,

you cannot use this construction:

SIUL2.MSCR0_255[61].B.SSS=0;
SIUL2.MSCR0_255[61].B.ODC=2;

8-bit or 16-bit access to SIUL.MSCR register is prohibited. Only 32-bit access is permitted. You have to use SIUL2.MSCR0_255[61].R = your_value;

Please look at the following figure:

Regards,

Martin

[changchen]

thank you first of all, I think what you said is  the  main reasons. later I  change the  'SIUL2.MSCR0_255[61].B.SSS=0;
SIUL2.MSCR0_255[61].B.ODC=2; ' into 'SIUL2.MSCR0_255[0].B.SSS=0; SIUL2.MSCR0_255[0].B.ODC=2; ' or  'SIUL2.MSCR0_255[32].B.SSS=0; SIUL2.MSCR0_255[32].B.ODC=2; 'or  'SIUL2.MSCR0_255[145].B.SSS=0; SIUL2.MSCR0_255[145].B.ODC=2; '

the output of corresponding pin is right.