Print to Serial port of an STM32F030F4P6

Hi.

I have a diy board with STM32F030F4P6 Atollic TrueSTUDIO 9.3.0 and STM32CubeMX 5.2.1.

I want to use it 's serial port in order to print (for debugging), like in Arduino we use the Serial.print().

I 've followed a few things I found on the internet but without success.

I use an FTDI board whose:

• RX is connected to the TX(pin PA2) of the MCU.
• TX is connected to the RX(pin PA3) of the MCU.

So, I made a project with STM32CubeMX, where I configured pins PA2 as USART1_TX and PA3 as USART1_RX. Here is the usart.c file:

/**
 ******************************************************************************
 * File Name : USART.c
 * Description : This file provides code for the configuration
 * of the USART instances.
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
 * All rights reserved.</center></h2>
 *
 * This software component is licensed by ST under BSD 3-Clause license,
 * the "License"; You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at:
 * opensource.org/licenses/BSD-3-Clause
 *
 ******************************************************************************
 */
 
/* Includes ------------------------------------------------------------------*/
#include "usart.h"
 
/* USER CODE BEGIN 0 */
 
/* USER CODE END 0 */
 
UART_HandleTypeDef huart1;
 
/* USART1 init function */
 
void MX_USART1_UART_Init(void)
{
 
 huart1.Instance = USART1;
 huart1.Init.BaudRate = 9600;
 huart1.Init.WordLength = UART_WORDLENGTH_8B;
 huart1.Init.StopBits = UART_STOPBITS_1;
 huart1.Init.Parity = UART_PARITY_NONE;
 huart1.Init.Mode = UART_MODE_TX_RX;
 huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
 huart1.Init.OverSampling = UART_OVERSAMPLING_16;
 huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
 huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
 if (HAL_UART_Init(&huart1) != HAL_OK)
 {
 Error_Handler();
 }
 
}
 
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
 
 GPIO_InitTypeDef GPIO_InitStruct = {0};
 if(uartHandle->Instance==USART1)
 {
 /* USER CODE BEGIN USART1_MspInit 0 */
 
 /* USER CODE END USART1_MspInit 0 */
 /* USART1 clock enable */
 __HAL_RCC_USART1_CLK_ENABLE();
 
 __HAL_RCC_GPIOA_CLK_ENABLE();
 /**USART1 GPIO Configuration 
 PA2 ------> USART1_TX
 PA3 ------> USART1_RX 
 */
 GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
 GPIO_InitStruct.Alternate = GPIO_AF1_USART1;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
 /* USART1 interrupt Init */
 HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
 HAL_NVIC_EnableIRQ(USART1_IRQn);
 /* USER CODE BEGIN USART1_MspInit 1 */
 
 /* USER CODE END USART1_MspInit 1 */
 }
}
 
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{
 
 if(uartHandle->Instance==USART1)
 {
 /* USER CODE BEGIN USART1_MspDeInit 0 */
 
 /* USER CODE END USART1_MspDeInit 0 */
 /* Peripheral clock disable */
 __HAL_RCC_USART1_CLK_DISABLE();
 
 /**USART1 GPIO Configuration 
 PA2 ------> USART1_TX
 PA3 ------> USART1_RX 
 */
 HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);
 
 /* USART1 interrupt Deinit */
 HAL_NVIC_DisableIRQ(USART1_IRQn);
 /* USER CODE BEGIN USART1_MspDeInit 1 */
 
 /* USER CODE END USART1_MspDeInit 1 */
 }
} 
 
/* USER CODE BEGIN 1 */
 
/* USER CODE END 1 */
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

And this is the code in main.c while loop:

/* USER CODE BEGIN WHILE */
 while (1)
 {
	 //print out static text
	 int len=sprintf(buffer,"Hello\r\n"); //sprintf will return the length of 'buffer'
	 HAL_UART_Transmit(&huart1, buffer, len, 1000);
 
	 //print out variable
	 len=sprintf(buffer,"This is i:%i\r\n",counter); //sprintf will return the length of 'buffer'
	 HAL_UART_Transmit(&huart1, buffer, len, 1000);
 
	 counter++;
 
 /* USER CODE END WHILE */
 
 /* USER CODE BEGIN 3 */
 }

I used the Arduino IDE 's Serial Monitor, (I found the correct port from Devices Manager) but I saw no result being printed.

When I enter a character and press 'Send' an LED blinks on the FTDI board, so I guess...something happens.

I also tried Putty terminal and also nothing was being printed.

Any help is welcome.