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Phanirajkiran M
Phanirajkiran M
Senior
May 8, 2018
Solved

CubeMX for Nucleo144 L4R5ZI printf no response from Board

  • May 8, 2018
  • 3 replies
  • 969 views
Posted on May 08, 2018 at 16:38

HI

Im using Nucleo144 L4R5ZI board, using CubeMX i have generated the code to enabling the LPUART1 which the ST-Link is enabled for virtual COM port. 

when i just took a simple private variable im trying to see the message on lpuart1 using HAL_UART_Transmit, nothing is being displayed. 

Tried Debugging it halts the system on HAL_Init().

May be with the code generated or so??

When i tried with the example provided for the board,PWR/PWR_ModesSelection/Src it works fine, more over this code uses _GNU-...putchar ....redirecting to UART......and making the printf enable. 

But i tried the basic way of getting the message on virtual COM port.

May be something missing in the code which is generated by CubeMX.

Thanks

Phanirajkiran

#cubemx
This topic has been closed for replies.
Best answer by Phanirajkiran M
Posted on May 09, 2018 at 12:54

Hi Clive, 

As you pointed out before, yes it is regarding the SystemClock_Config, in cubemx it picksup RCC_OSCILLATORTYPE_HSE.

Now i have fixed it up.

Thanks for your support and leads in directing towards the problem.

Thanks

Phanirajkiran

3 replies

Tesla DeLorean
Tesla DeLorean
Guru
May 8, 2018
Posted on May 09, 2018 at 00:06

>>May be something missing in the code which is generated by CubeMX.

Quite probably, not using CubeMX here.

Would look at PLLM setting, GPIO Bank G power enable, and LPUART prescaler

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Phanirajkiran M
Phanirajkiran MAuthor
Senior
May 9, 2018
Posted on May 09, 2018 at 08:58

Hi 

These are the below settings where working COM port:

Working example code: 

0690X0000060B1PQAU.png0690X0000060B98QAE.png

CubeMX Generated code: 

Where looked at the CubeMX generated code in SystemClock_Config 

It uses the

 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

And the peripheral clock is also present.

/**

* @brief System Clock Configuration

* @retval None

*/

void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct;

RCC_ClkInitTypeDef RCC_ClkInitStruct;

RCC_PeriphCLKInitTypeDef PeriphClkInit;

/**Configure the main internal regulator output voltage

*/

if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST) != HAL_OK)

{

_Error_Handler(__FILE__, __LINE__);

}

/**Initializes the CPU, AHB and APB busses clocks

*/

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;

RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

RCC_OscInitStruct.PLL.PLLN = 30;

RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;

RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;

RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;

if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

{

_Error_Handler(__FILE__, __LINE__);

}

/**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_5) != HAL_OK)

{

_Error_Handler(__FILE__, __LINE__);

}

PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART3|RCC_PERIPHCLK_LPUART1

|RCC_PERIPHCLK_USB;

PeriphClkInit.Usart3ClockSelection = RCC_USART3CLKSOURCE_PCLK1;

PeriphClkInit.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_PCLK1;

PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLLSAI1;

PeriphClkInit.PLLSAI1.PLLSAI1Source = RCC_PLLSOURCE_HSE;

PeriphClkInit.PLLSAI1.PLLSAI1M = 1;

PeriphClkInit.PLLSAI1.PLLSAI1N = 12;

PeriphClkInit.PLLSAI1.PLLSAI1P = RCC_PLLP_DIV2;

PeriphClkInit.PLLSAI1.PLLSAI1Q = RCC_PLLQ_DIV2;

PeriphClkInit.PLLSAI1.PLLSAI1R = RCC_PLLR_DIV2;

PeriphClkInit.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_48M2CLK;

if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)

{

_Error_Handler(__FILE__, __LINE__);

}

/**Configure the Systick interrupt time

*/

HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

/**Configure the Systick

*/

HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

/* SysTick_IRQn interrupt configuration */

HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

}

When i tired to debug the code which CubeMX generated, when it enters into the Debug mode, Target enters into the Halt state and 

Waits for debug trigger to HAL_RCC_OscConfig

And prompt pauses at  499 line to READ the RCC and RCC_CR are at the Tick.

0690X0000060B5uQAE.png

Thanks

Phanirajkiran

Tesla DeLorean
Tesla DeLorean
Guru
May 9, 2018
Posted on May 09, 2018 at 10:27

I would do this to insure the structures were clear/clean,

void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct = {0};

RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

...

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Phanirajkiran M
Phanirajkiran MAuthorAnswer
Senior
May 9, 2018
Posted on May 09, 2018 at 12:54

Hi Clive, 

As you pointed out before, yes it is regarding the SystemClock_Config, in cubemx it picksup RCC_OSCILLATORTYPE_HSE.

Now i have fixed it up.

Thanks for your support and leads in directing towards the problem.

Thanks

Phanirajkiran

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