I am trying to simply turn PA0 HI on an STM32F030F4P6 using Cube IDE. No matter what I do, if I try to write to any GPIO registers (including using the auto generated Inits), I get a Hard Fault. Nothing solves it :(

[BBrow.2]

I am trying to simply turn PA0 HI on an STM32F030F4P6 using Cube IDE.

No matter what I do, if I try to write to any GPIO registers (including using the auto generated Inits), I get a Hard Fault. Nothing solves it :( Tried debugging it, no matter what I do, I get a hard fault at any attempt to use any GPIO registers using any methods!!

[S.Ma]

Have you selected the right mcu in the project settings? If you can go in debug mode with st link, you can view and change all hw registers manually.

[waclawek.jan]

Is this a "known good" hardware like Nucleo or Disco?

JW

[gbm]

Looking for sympathy or for help? In the 2nd case it is necessary to post some code including the port setup and the attempted operations.

[BBrow.2]

I have tried creating the project in MX Cube, but strangly, it does not open it in IDE cube like it does for other CPUs. Its code fails.

I have tried creating new project in IDE cube, it fails (Note:- IDE cube does not have STM32F030x4.h, it only has STM32F030x6.h).

I have tried manually doing everything.

One example:-

 HAL_Init();

// SystemClock_Config();

// MX_GPIO_Init();

 RCC->AHBENR |= (1<<17);

 RCC->AHBRSTR |= (1<<17);

 GPIOA->ODR = 0xFF;

Hard Fault at GPIOA->ODR = 0xFF;

same fault if I change it to GPIO->MODER etc

same fault if I include the SystemClock_Config(); and remove the RCC lines

different fault (Hard fault somewhere else) if I enable MX_GPIO_Init();

[BBrow.2]

080002ae <HardFault_Handler>:

/**

 * @brief This function handles Hard fault interrupt.

 */

void HardFault_Handler(void)

{

 80002ae: b580    push {r7, lr}

 80002b0: af00    add r7, sp, #0

 /* USER CODE BEGIN HardFault_IRQn 0 */

 /* USER CODE END HardFault_IRQn 0 */

 while (1)

 80002b2: e7fe    b.n 80002b2 <HardFault_Handler+0x4>

[BBrow.2]

Stepping it from RESET shows it stops at the GPIO command (str - 800024a)

 GPIOA->ODR = 0xFF;

 8000244: 2390    movs r3, #144 ; 0x90

 8000246: 05db    lsls r3, r3, #23

 8000248: 22ff    movs r2, #255 ; 0xff

 800024a: 615a    str r2, [r3, #20]

//  GPIOA->

R3 appears to be correct (48000000 is GPIOA address, 20 more is ODR address)

[BBrow.2]

More specifically, GPIO is on AHB2 (Nothing else on AHB2), so it would seem that there is some kind of issue with AHB2 access.

[BBrow.2]

Cube IDE debug

[BBrow.2]

Even using:-

*((uint32_t *)addr) = 0xff;

if addr = 0x40020000 (AHB1) no problem

if addr = 0x48000000(AHB2) HARD FAULT

[S.Ma]

If this is not a Nucleo board, get a Genuine Nucleo to test your code, because that is probably the first thing to share with support.