STM32H7A3 stuck in SystemClock_Config in KEIL

[laurianus]

I have a problem with an STM32H7A3 which remains stuck in SystemClock_Config. I use Keil. Any ideas please?

it just remain stucked here:

if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)



void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

/*AXI clock gating */
RCC->CKGAENR = 0xFFFFFFFF;

/** Supply configuration update enable
*/
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);

/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}

/** Configure LSE Drive Capability
*/
HAL_PWR_EnableBkUpAccess();
__HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSE
|RCC_OSCILLATORTYPE_LSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.LSEState = RCC_LSE_ON;
RCC_OscInitStruct.HSIState = RCC_HSI_DIV1;
RCC_OscInitStruct.HSICalibrationValue = 64;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 42;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 4;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}

/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}
}

[mƎALLEm]

Hello @laurianus 

1. Please use </>  button to format your shared code. See this post. (I'm editing your post).
2. You need to share your schematics especially the HSE and the LSE parts.
3. Please don't write to the reserved bits:

   /*AXI clock gating */
   RCC->CKGAENR = 0xFFFFFFFF;

Keep them to 0.

Thanks

[laurianus]

It was stuck in LSE so I just changed from LSE to LSI and is working now. Maybe it is a problem with LSE Crystal

[mƎALLEm]

Most probably the LSE didn't start . In that case you need to review your crystal parameters based on the application AN2867 "Guidelines for oscillator design on STM8AF/AL/S and STM32 MCUs/MPUs".

At first step try to increase the drive level using this macro:

__HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

Or your crystal is disconnected from the MCU pins

[laurianus]

---

Keep them to 0.

Thanks

---

This was generated like this by STM32 Cube MX

[mƎALLEm]

---

@laurianus wrote:

---

Keep them to 0.

Thanks

---

This was generated like this by STM32 Cube MX

---

In that case, I need to escalate that internally. Could you please share your ioc file?

[laurianus]

At first step try to increase the drive level using this macro:

__HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

---

This does not work on any level. I will check LSE Crystal. ANywya at leats now I can use LSI even is not so precise.

Thank you

[Tesla DeLorean]

Where's it stuck? the VOSRDY line?

What board? The NUCLEO-H7A3ZI-Q?

Sure this is an LDO board and not SMPS ?

[laurianus]

Where's it stuck? the VOSRDY line?

What board? The NUCLEO-H7A3ZI-Q?

Sure this is an LDO board and not SMPS ?

---

It stuck here

while (__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) == 0U)

It is a custom board and it has LDO power supply

[mƎALLEm · Accepted solution]

According to what you provided as info, I'm pretty sure it's a hardware issue: broken crystal, crystal not suitable, big value of the serie resistor Rext (if it's available)  or the crystal is not well connected to the MCU pins.