HardFault when initializing TouchGFX with proprietary RTOS

[MMenz.1]

 

I am trying to port a Project using TouchGFX (Designer 4.17) and FreeRTOS to our own RTOS using IAR 8.40 Toolchain and th STM32F769I-Disco Board (Same controller will be used in the final product).

 

When calling MX_TouchGFX_Init() the System runs into an a HardFault

 

The HardFault occurs in the Library code (touchgfx::Screen::draw accroding to disassemly PC: 0x3ade9e, calles from touchgfx::Application)

 

_ZN8touchgfx6Screen4drawEv:

 0x3a'de7e: 0xb53e PUSH {R1-R5, LR}

 0x3a'de80: 0x2200 MOVS R2, #0

 0x3a'de82: 0xf8df 0x4264 LDR.W R4, [PC, #0x264] ; _ZN8touchgfx3HAL13DISPLAY_WIDTHE

 touchgfx::HAL::DISPLAY_WIDTH

 0x3a'de86: 0x9200 STR R2, [SP]

 0x3a'de88: 0xf8df 0x3258 LDR.W R3, [PC, #0x258] ; _ZN8touchgfx3HAL14DISPLAY_HEIGHTE

 touchgfx::HAL::DISPLAY_HEIGHT

 0x3a'de8c: 0x5ea2 LDRSH R2, [R4, R2]

 0x3a'de8e: 0xf9b3 0x5000 LDRSH.W R5, [R3]

 0x3a'de92: 0xf8ad 0x2004 STRH.W R2, [SP, #0x4]

 0x3a'de96: 0x4669 MOV R1, SP

 0x3a'de98: 0xf8ad 0x5006 STRH.W R5, [SP, #0x6]

 0x3a'de9c: 0x6802 LDR R2, [R0]

 0x3a'de9e: 0x6893 LDR R3, [R2, #0x8]

 0x3a'dea0: 0x4798 BLX R3

 0x3a'dea2: 0xb003 ADD SP, SP, #0xc

 0x3a'dea4: 0xbd30 POP {R4, R5, PC}

 

As far as I see this i do not have much options to break the

[MM..1]

Is your screen empty ? Try start with one screen one box empty project.

[MMenz.1]

I do have a version with empty screen. Unfortunately the HardFault does occur also with the empty app

[Romain DIELEMAN]

What version of TouchGFX are you using ? Could you share your FreeRTOS tasks just to check ? May be completely unrelated but i just want to see if you have named it properly and if the stack size is big enough.

/Romain

[MMenz.1]

Meanwhile. I have found the error. I have not initialized the CRC module but it is used within the library. Maybe it would be worth it to point out that this module is used in a future version of the lib? Thank you for your support

[Romain DIELEMAN]

Hi,

CRC is necessary to work with TouchGFX Designer and other ST packs. You get a warning message in the X-CUBE-TOUCHGFX.4.18.0 settings within STM32CubeMX when it is not enabled.

/Romain

[unsigned_char_array]

You get a warning when it's not enabled, but not a warning when "Do Not Generate Function Call" is checked. And I assume also no error if it is initialized after TouchGFX. In our code we had hardfaults and got no warnings because of this. Thank you MMenz.1  for giving your solution!