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ram data corrupt

JackShan over 5 years ago

hello

I write program in one kind of RTOS. But some times all the data in RAM are corrupt since I add some code

in functions, if continue add some code in the function, the data in RAM is OK.

Top replies

Westonsupermare Pier over 5 years ago +1 suggested

Guess you'll need to open the debugger and some listing files, and review the code and its interaction with memory. No one here has much insight into your random musings, which lack substance and detail...
Andy Neil over 5 years ago in reply to JackShan +1

Yes, virtually every 'C' compiler puts automatic variables on the stack. Sure, you can have a pointer to an auto variable - but you have to be certain that it will only ever be used while it remains...

Parents

0 JackShan over 5 years ago in reply to Westonsupermare Pier

hello pier

I found since implement code in 0x08003E32 in function _scatterload, the data copy from Flash to RAM is not correct. I paste the code here, do you have idea about this? If I want to check the relative data in Flash, how can I know the exact data address?

0x08003E20 4C06      LDR      r4,[pc,#24]  ; @0x08003E3C
0x08003E22 4D07      LDR      r5,[pc,#28]  ; @0x08003E40
0x08003E24 E006      B        0x08003E34
0x08003E26 68E0      LDR      r0,[r4,#0x0C]
0x08003E28 F0400301  ORR      r3,r0,#0x01
0x08003E2C E8940007  LDM      r4,{r0-r2}
0x08003E30 4798      BLX      r3
0x08003E32 3410      ADDS     r4,r4,#0x10
0x08003E34 42AC      CMP      r4,r5
0x08003E36 D3F6      BCC      0x08003E26
0x08003E38 F7FCF9C0  BL.W     __main_after_scatterload (0x080001BC)
0x08003E3C 3F04      DCW      0x3F04
0x08003E3E 0800      DCW      0x0800
0x08003E40 3F24      DCW      0x3F24
0x08003E42 0800      DCW      0x0800

Reply

0 JackShan over 5 years ago in reply to Westonsupermare Pier

hello pier

0x08003E20 4C06      LDR      r4,[pc,#24]  ; @0x08003E3C
0x08003E22 4D07      LDR      r5,[pc,#28]  ; @0x08003E40
0x08003E24 E006      B        0x08003E34
0x08003E26 68E0      LDR      r0,[r4,#0x0C]
0x08003E28 F0400301  ORR      r3,r0,#0x01
0x08003E2C E8940007  LDM      r4,{r0-r2}
0x08003E30 4798      BLX      r3
0x08003E32 3410      ADDS     r4,r4,#0x10
0x08003E34 42AC      CMP      r4,r5
0x08003E36 D3F6      BCC      0x08003E26
0x08003E38 F7FCF9C0  BL.W     __main_after_scatterload (0x080001BC)
0x08003E3C 3F04      DCW      0x3F04
0x08003E3E 0800      DCW      0x0800
0x08003E40 3F24      DCW      0x3F24
0x08003E42 0800      DCW      0x0800

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