CubeMX for Nucleo144 L4R5ZI printf no response from Board

[Phanirajkiran M]

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

[Tesla DeLorean]

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

[Phanirajkiran M]

Posted on May 09, 2018 at 08:58

Hi 

These are the below settings where working COM port:

Working example code: 

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.

Thanks

Phanirajkiran

[Tesla DeLorean]

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};

...

[Phanirajkiran M · Accepted solution]

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