RTOS: Load interrupt ISR to ram will occur the crash of the BIOS due to the

xiangjun quan99

Tool/software: TI-RTOS

As described by the title, when I load the ISR to the ram, the BISO collapses with the error of Unplugged interrupt intr# 19. I checked the pie TABLE, the ISR is inserted in the TABLE successfully. I dont konw why BIOS cannot find the ISR. What is the mechanism to check this error? Attached picture shows the address of the EPWM1_ISR and the content of the pie TABLE.

If the ISR runs in the flash, there is no problem.

version of bios: 6.46.5.55

version of CCS:6.2.0.00050

Thanks!

over 8 years ago

0 ToddMullanix over 8 years ago

TI__Guru* 96960 points

Hi,

Can you look in ROV->Hwi to see what interrupts are present? What C2000 device are you using?

Todd

0 xiangjun quan99 over 8 years ago

Prodigy 250 points

Update: Once one of the functions which execute in the ISR is loaded in RAM, the BISO also collapses.

0 ToddMullanix over 8 years ago in reply to xiangjun quan99

TI__Guru* 96960 points

How are you creating the ISRs? Also can you look in ROV->Hwi to see what interrupts are present? What C2000 device are you using?

0 xiangjun quan99 over 8 years ago in reply to ToddMullanix

Prodigy 250 points

I use Hwi_plug(48, EPWM1_ISR) to creat OSR on F28379D. And it seems that only tick interrupt in the ROV->Hwi as shown in the picture.

0 xiangjun quan99 over 8 years ago in reply to ToddMullanix

Prodigy 250 points

Actually, every time when the program is loaded before running, the ROV report a error that: 'Target memory read failed at address 0x4, length 18....' But the difference are when the interrupt is loaded in ram the BIOS will collapse after running, when the interrupt is not loaded in the ram, then after running the program, the error will disappear. I think maybe this is the root cause?

0 xiangjun quan99 over 8 years ago in reply to ToddMullanix

Prodigy 250 points

And I also attach my cmd file for check. Thanks!

cmd file.rar

0 ToddMullanix over 8 years ago in reply to xiangjun quan99

TI__Guru* 96960 points

Hi,

The ROV warning at the beginning is fine since the application has not started.

Do you make any kernel calls in the ISR? When you use Hwi_plug, that means you do not want the kernel to interact with the interrupt. So the ISR cannot call into the kernel.

Todd

0 xiangjun quan99 over 8 years ago in reply to ToddMullanix

Prodigy 250 points

no the function StartADCovert() is also empty. I know the meaning of using Hwi_plug, I indeed do not want to use the interrupt dispatch of BIOS.

0 xiangjun quan99 over 8 years ago in reply to ToddMullanix

Prodigy 250 points

Hi, Tod I think I have found the reason. It is very stupid, I used wrong memcpy function so that the function is not copied into ram... Now, the problem has been solved. Thanks Tod.

0 ToddMullanix over 8 years ago in reply to xiangjun quan99

TI__Guru* 96960 points

Doh! It happens to everyone:) Glad you got it resolved.

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RTOS: Load interrupt ISR to ram will occur the crash of the BIOS due to the