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Nucleo F401RE fails to execute Clock init issue

If someone has the time to also test the software-patch side, while the hardware fix is either temporarily undone or not yet done, please use a standard platformio.ini of

[env:nucleo_f401re]
board = nucleo_f401re
platform = ststm32
framework = arduino

with a src\main.cpp of

#include <Arduino.h>

extern "C" 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 RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 8;
  RCC_OscInitStruct.PLL.PLLN = 84;
  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 buses 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_2) != HAL_OK)
  {
    Error_Handler();
  }
}


void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(500);
  digitalWrite(LED_BUILTIN, LOW);
  delay(500);
}

The clock init code is generated by STM32CubeMX and should get the chip from its 8MHz HSI to the full 84MHz clock speed.

If all is good, this should blink the builtin LED 2 times per second, without needing the clock input signal from the ST-Link.

Of course, the external clock signal should be preferred since it’s sourced from a stable quartz crystal instead of the internal RC oscillator, which can wobble a bit.

2 Likes

Hi Max

Just tried your above code, it runs as expected … :slight_smile:

1 Like

Same here, I removed the soldering. Excellent.

Under a microscope at the office I bridged SB16 & SB50, and now I can use the current platform… :slight_smile:

platform = ststm32 (10.0.1)

Processing nucleo_f401re (board: nucleo_f401re; platform: ststm32; framework: arduino)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/ststm32/nucleo_f401re.html
PLATFORM: ST STM32 (10.0.1) > ST Nucleo F401RE
HARDWARE: STM32F401RET6 84MHz, 96KB RAM, 512KB Flash
DEBUG: Current (stlink) On-board (stlink) External (blackmagic, cmsis-dap, jlink)
PACKAGES:
 - framework-arduinoststm32 4.10900.200819 (1.9.0)
 - framework-cmsis 2.50501.200527 (5.5.1)
 - tool-dfuutil 1.9.200310
 - tool-openocd 2.1000.200630 (10.0)
 - tool-stm32duino 1.0.2
 - toolchain-gccarmnoneeabi 1.90201.191206 (9.2.1)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 16 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <Adafruit GFX Library> 1.10.4
|   |-- <SPI> 1.0
|   |-- <Adafruit BusIO> 1.7.1
|   |   |-- <Wire> 1.0
|   |   |-- <SPI> 1.0
|   |-- <Wire> 1.0
|-- <Adafruit ST7735 and ST7789 Library> 1.6.0
|   |-- <Adafruit GFX Library> 1.10.4
|   |   |-- <SPI> 1.0
|   |   |-- <Adafruit BusIO> 1.7.1
|   |   |   |-- <Wire> 1.0
|   |   |   |-- <SPI> 1.0
|   |   |-- <Wire> 1.0
|   |-- <SPI> 1.0
|-- <Adafruit BusIO> 1.7.1
|   |-- <Wire> 1.0
|   |-- <SPI> 1.0
|-- <Wire> 1.0
|-- <SPI> 1.0
Building in release mode
Checking size .pio\build\nucleo_f401re\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [          ]   1.2% (used 1208 bytes from 98304 bytes)
Flash: [          ]   4.5% (used 23688 bytes from 524288 bytes)
Configuring upload protocol...
AVAILABLE: blackmagic, cmsis-dap, jlink, mbed, stlink
CURRENT: upload_protocol = stlink
Uploading .pio\build\nucleo_f401re\firmware.elf

Out of interest sake the small tag on the underside of my board is marked ‘MB1136 C-01’, went looking and found this at the bottom pg24 of this pdf https://www.st.com/resource/en/user_manual/dm00105823-stm32-nucleo-64-boards-mb1136-stmicroelectronics.pdf

Thx @vortex314 @maxgerhardt :slight_smile:

1 Like

Ahh, so that’s where the PCB board revision is.

There are two possible default configurations of the HSE pins, depending on the version of the STM32 Nucleo board hardware.
The board version MB1136 C-01 or MB1136 C-02 is mentioned on the sticker, placed on the bottom side of the PCB.
The board marking MB1136 C-01 corresponds to a board, configured as HSE not used.
The board marking MB1136 C-02 (or higher) corresponds to a board, configured to use ST-LINK MCO as the clock input.

Mine’s a MB1136 C-04 so a newer revision and already setup for MCO as clock :slight_smile: