Clock configuration error using CubeIDE for F401RETx using 8Mh external clock

ICohe.1 · ‎2020-04-30

Summery:

My aim is to run my board with external clock of 8Mhz with i2c1 enabled, However automatic CubeIDE Clock configuration code generate run time error.

The details:

Board with STM32F401RTE chip, New STM32CubeIDE project default clock configuration works fine. Board have external 8Mhz Crystal, which I want to use. I first enabled Crystal/Ceramic Resonator in the High Speed Clock (HSI) selection box, then I entered 8 in the input frequency box, then I clicked on PLL source Mux to select HSE and on System Clock Mux to select PLLCLK. Then a few conflict (issues) showed up so I clicked on the: Resolve Clock Issues button. This resolved all issues in the graphic clock configuration tool BUT trying to run the program resulted error when the generated code try to configure the clock. here is the code resulting a call to Error_Handler() in the call to SystemClock_Config() as follow (both calls to Error_Handler() was invoked):

(i would expect the tool to generate an error free configuration when I click on Resolve Clock issues)

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
  /** Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 4;
  RCC_OscInitStruct.PLL.PLLN = 50;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
 
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }
}

The entire ioc file content is follwo:

#MicroXplorer Configuration settings - do not modify
File.Version=6
KeepUserPlacement=false
Mcu.Family=STM32F4
Mcu.IP0=I2C1
Mcu.IP1=NVIC
Mcu.IP2=RCC
Mcu.IP3=SYS
Mcu.IPNb=4
Mcu.Name=STM32F401R(D-E)Tx
Mcu.Package=LQFP64
Mcu.Pin0=PH0 - OSC_IN
Mcu.Pin1=PH1 - OSC_OUT
Mcu.Pin2=PB8
Mcu.Pin3=PB9
Mcu.Pin4=VP_SYS_VS_Systick
Mcu.PinsNb=5
Mcu.ThirdPartyNb=0
Mcu.UserConstants=
Mcu.UserName=STM32F401RETx
MxCube.Version=5.6.1
MxDb.Version=DB.5.0.60
NVIC.BusFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false
NVIC.DebugMonitor_IRQn=true\:0\:0\:false\:false\:true\:false\:false
NVIC.ForceEnableDMAVector=true
NVIC.HardFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false
NVIC.MemoryManagement_IRQn=true\:0\:0\:false\:false\:true\:false\:false
NVIC.NonMaskableInt_IRQn=true\:0\:0\:false\:false\:true\:false\:false
NVIC.PendSV_IRQn=true\:0\:0\:false\:false\:true\:false\:false
NVIC.PriorityGroup=NVIC_PRIORITYGROUP_4
NVIC.SVCall_IRQn=true\:0\:0\:false\:false\:true\:false\:false
NVIC.SysTick_IRQn=true\:0\:0\:false\:false\:true\:false\:true
NVIC.UsageFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false
PB8.Locked=true
PB8.Mode=I2C
PB8.Signal=I2C1_SCL
PB9.Locked=true
PB9.Mode=I2C
PB9.Signal=I2C1_SDA
PH0\ -\ OSC_IN.Mode=HSE-External-Oscillator
PH0\ -\ OSC_IN.Signal=RCC_OSC_IN
PH1\ -\ OSC_OUT.Mode=HSE-External-Oscillator
PH1\ -\ OSC_OUT.Signal=RCC_OSC_OUT
PinOutPanel.RotationAngle=0
ProjectManager.AskForMigrate=true
ProjectManager.BackupPrevious=false
ProjectManager.CompilerOptimize=6
ProjectManager.ComputerToolchain=false
ProjectManager.CoupleFile=false
ProjectManager.CustomerFirmwarePackage=
ProjectManager.DefaultFWLocation=true
ProjectManager.DeletePrevious=true
ProjectManager.DeviceId=STM32F401RETx
ProjectManager.FirmwarePackage=STM32Cube FW_F4 V1.25.0
ProjectManager.FreePins=false
ProjectManager.HalAssertFull=false
ProjectManager.HeapSize=0x200
ProjectManager.KeepUserCode=true
ProjectManager.LastFirmware=true
ProjectManager.LibraryCopy=1
ProjectManager.MainLocation=Core/Src
ProjectManager.NoMain=false
ProjectManager.PreviousToolchain=
ProjectManager.ProjectBuild=false
ProjectManager.ProjectFileName=i2c_test.ioc
ProjectManager.ProjectName=i2c_test
ProjectManager.StackSize=0x400
ProjectManager.TargetToolchain=STM32CubeIDE
ProjectManager.ToolChainLocation=
ProjectManager.UnderRoot=true
ProjectManager.functionlistsort=1-SystemClock_Config-RCC-false-HAL-false
RCC.48MHZClocksFreq_Value=25000000
RCC.AHBFreq_Value=50000000
RCC.APB1CLKDivider=RCC_HCLK_DIV2
RCC.APB1Freq_Value=25000000
RCC.APB1TimFreq_Value=50000000
RCC.APB2Freq_Value=50000000
RCC.APB2TimFreq_Value=50000000
RCC.CortexFreq_Value=50000000
RCC.FCLKCortexFreq_Value=50000000
RCC.HCLKFreq_Value=50000000
RCC.HSE_VALUE=8000000
RCC.HSI_VALUE=16000000
RCC.I2SClocksFreq_Value=192000000
RCC.IPParameters=48MHZClocksFreq_Value,AHBFreq_Value,APB1CLKDivider,APB1Freq_Value,APB1TimFreq_Value,APB2Freq_Value,APB2TimFreq_Value,CortexFreq_Value,FCLKCortexFreq_Value,HCLKFreq_Value,HSE_VALUE,HSI_VALUE,I2SClocksFreq_Value,LSE_VALUE,LSI_VALUE,MCO2PinFreq_Value,PLLCLKFreq_Value,PLLM,PLLN,PLLQCLKFreq_Value,PLLSourceVirtual,RTCFreq_Value,RTCHSEDivFreq_Value,SYSCLKFreq_VALUE,SYSCLKSource,VCOI2SOutputFreq_Value,VCOInputFreq_Value,VCOOutputFreq_Value,VcooutputI2S
RCC.LSE_VALUE=32768
RCC.LSI_VALUE=32000
RCC.MCO2PinFreq_Value=50000000
RCC.PLLCLKFreq_Value=50000000
RCC.PLLM=4
RCC.PLLN=50
RCC.PLLQCLKFreq_Value=25000000
RCC.PLLSourceVirtual=RCC_PLLSOURCE_HSE
RCC.RTCFreq_Value=32000
RCC.RTCHSEDivFreq_Value=4000000
RCC.SYSCLKFreq_VALUE=50000000
RCC.SYSCLKSource=RCC_SYSCLKSOURCE_PLLCLK
RCC.VCOI2SOutputFreq_Value=384000000
RCC.VCOInputFreq_Value=2000000
RCC.VCOOutputFreq_Value=100000000
RCC.VcooutputI2S=192000000
VP_SYS_VS_Systick.Mode=SysTick
VP_SYS_VS_Systick.Signal=SYS_VS_Systick
board=custom
isbadioc=false

Thanks

berendi · ‎2020-04-30

Verify first that the crystal works at all.

int main(void) {
	RCC->CR |= RCC_CR_HSEON;
	while(!(RCC->CR & RCC_CR_HSERDY))
		__ISB();
	__DSB(); // set breakpoint here, is it reached?
}

> Board have external 8Mhz Crystal, which I want to use.

Just to be sure, it isn't a Nucleo board, is it?

ICohe.1 · ‎2020-04-30

No the breakpoint is not reached it is stucked in the endless loop. (so I guess the crystal is working fine

..And No it is not an Nucleo board

berendi · ‎2020-04-30

If it is stuck in the loop at lines 3-4, waiting for the HSERDY bit to become 1, then the crystal is not working.

ICohe.1 · ‎2020-04-30

YOU ARE RIGHT !!

Just noticed a missing connection between mcu and Crystal

Thanks a lot.