HERCULES_SAFETY_MCU_DEMOS: TMS570LC43x SAFETI Diagnostic

Pankaj Verma

Part Number: HERCULES_SAFETY_MCU_DEMOS

Hi All,

I am working on SafeTI diagnostic library with RTOS. The MCU we are using is TMS570LC43xx .

I am facing some problem that

Before main function (" _c_int00() and afterSTC()") all the initialization done in Supervisor mode "ARM_MODE_SVC 0x13". But for initialization of RTOS schedular we need to run processor in system mode "ARM_MODE_SYS 0x1F".

I have tried to change from SVC to system mode but the code is going to reset SWRST. i have tried to change in SL_Init_R5Registers(); and SL_Init_StackPointers(); also. but no result.

Q1. How we can change mode from supervisor mode "ARM_MODE_SVC 0x13" to system mode "ARM_MODE_SYS 0x1F".

Q2. After switching from supervisor mode "ARM_MODE_SVC 0x13" to system mode "ARM_MODE_SYS 0x1F", can we run all the SL test cases in TASK?

Thanks and regard

Pankaj Verma

over 2 years ago

0 jagadish gundavarapu over 2 years ago

TI__Guru 63235 points

Hi Pankaj Verma,

Can you please refer below thread and attached code in the below thread

(+) TMS570LC4357: TI Fee functions hang inside the FreeRTOS task. - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

In this thread i switched modes in FreeRTOS code.

Thanks & regards,
Jagadish.

0 Pankaj Verma over 2 years ago in reply to jagadish gundavarapu

Prodigy 150 points

HI Jagdish,

I have tried by using assembly instruction to change the processor mode

.def _CPU_system_mode_Switch
.asmFunc
_CPU_system_mode_Switch

MRS r0, CPSR ;read cpsr into r0
orr r0, r0, #0x1f ; set mode to SYS
MSR CPSR, r0 ; write r0 back to cpsr
bx lr ; return

.endasmfunc

After execution of this instruction system is going to reset condition and MCU System register shows SWRST.

I think we need to change in below section also using __SVC "Can you share me the code to switching mode, u tired previously"

.ref _c_int00
.ref vUndefAbort
.ref vSafeRTOSSVCHandler
.ref vPrefetchAbort
.ref vDataAbort
.ref phantomInterrupt
.def resetEntry

;-------------------------------------------------------------------------------
; interrupt vectors

resetEntry
b _c_int00
b vUndefAbort
b vSafeRTOSSVCHandler
b vPrefetchAbort
b vDataAbort
b phantomInterrupt
ldr pc,[pc,#-0x1b0]
ldr pc,[pc,#-0x1b0]

Thanks

Pankaj Verma

0 jagadish gundavarapu over 2 years ago in reply to Pankaj Verma

TI__Guru 63235 points

Hi Pankaj,

Please refer the below attached code in my previous shared thread:

If you verify code here i am calling below two lines to switch mode to supervisor mode

u32Mode = switchCpuMode(u32Mode);

We passed Mode value as 0x13 because you can see the mode value of the supervisor mode.

So similarly, you can pass your required mode value to the above function.

Thanks & regards,
Jagadish.

0 Pankaj Verma over 2 years ago in reply to jagadish gundavarapu

Prodigy 150 points

HI Jagadish,

I appreciate your efforts.

Got it i will try and update you.

But parallelly, i am facing some more issues.

Can you please answer this thread.

Please see this thread

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1242577/safeti_diag_lib-tms570lc43x-safeti-diagnostic

Thanks

Pankaj Verma

0 jagadish gundavarapu over 2 years ago in reply to Pankaj Verma

TI__Guru 63235 points

Hi Pankaj,

I will answer the thread you mentioned and i am closing this thread.

Thanks & regards,
Jagadish.