Hi @Owen_Williams
Your solution works like a charm !!! PC13 toggling like a devil . You make it happens.
Thank you so much 
I publish here your smart and effective recipe applied to my case with 8 Mhz HSE and configuration and MCU running at 100 MHz in case someone else could have this issue.
platformio.ini :
[env:genericSTM32F405RG]
platform = ststm32
board = genericSTM32F405RG
board_build.f_cpu = 100000000L
framework = arduino
debug_tool = stlink
upload_protocol = stlink
build_flags =
-D HSE_VALUE=8000000
monitor_speed = 115200
lib_deps =
askuric/Simple FOC@^2.0.2
Wire
SPI
And a simple sketch to verify that everything its is working:
#include <Arduino.h>
#include <SimpleFOC.h>
// This SystemClock_Config is copy&paste from CubeIDE
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_SCALE1);
/** 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 = 100;
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_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
{
Error_Handler();
}
}
void setup() {
pinMode(PA8,OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(PA8, LOW);
delay(100);
digitalWrite(PA8, HIGH);
delay(100);
}
Thank you so much again !!! 
