STM32F303RET6 USART config

Question

I'm new with stm32 microcontrollers, I decided to start with STM32F303RET6 nucleoboard. I'm trying to set up the simplest usart transmission using CMSIS, but for some reason, I cannot see anything in Putty terminal. There are no problems with it if I use HAL_LIB, it works just fine, however, I want to setup it up with CMSIS... Can you please point me, to where I have a mistake?

#include "stm32f3xx.h"
#include "main.h"
void SystemClock_Config(void);

void initClocks(void)
{
    SET_BIT(RCC->AHBENR, RCC_AHBENR_GPIOAEN); // ENABLE GPIO PORT A CLOCK
    RCC->APB1ENR |= RCC_APB1ENR_USART2EN;     // ENABLE UART2 CLOCK
}
void configPinMode(void)
{
    GPIOA->MODER &= ~((3u << 4)    // CLEAR PA2
                     |(3u << 6));  // CLEAR PA3

    // SET PIN MODES
    GPIOA->MODER |= ((2u << 4)     // SET PA2 TO AF
                    |(2u << 6));   // SET PA3 TO AF
}
void setAF(void)
{
    GPIOA->AFR[2] &= ~((15u << 8)       // CLEAR PA2 AF
                      |(15u << 12));     // CLEAR PA3 AF

    // SET ALTERNATE FUNCTION
    GPIOA->AFR[2] |= ((7u << 8)         // SET PA2 AF
                     |(7u << 12));       // SET PA3 AF

}
void configUart1Pins(void)
{
    configPinMode();
    setAF();
}

void configUart1(void)
{
    USART2->CR1 &= ~(USART_CR1_M1       // CLEAR M1 FOR 1 START BIT AND 8 DATA BITS (28)
                    |(0x03 << 26)       // INHIBIT INTERRUPTS AT BITS 26 AND 27     (27/26)
                    |USART_CR1_OVER8    // OVERSAMPLING BY 16                       (15)
                    |USART_CR1_CMIE     // INHIBIT CHARACTER MATCH INTERRUPT        (14)
                    |USART_CR1_MME      // DON'T ENABLE MUTE MODE                   (13)
                    |USART_CR1_M0       // CLEAR M0 FOR 1 START BIT AND 8 DATA BITS (12)
                    |USART_CR1_PCE      // NOT IMPLEMENTING PARITY CONTROL          (10)
                    |(0x1F << 3)        // INHIBIT INTERRUPTS AT BITS 4 TO 8        (4-8)
                    |USART_CR1_TE       // DON'T ENABLE TRANSMITTER JUST YET        (3)
                    |USART_CR1_RE       // DON'T ENABLE RECEIVER JUST YET           (2)
                    |USART_CR1_UE);     // DON'T ENABLE UART1 JUST YET              (0)

    // CONFIGURE USART CR2 REGISTER
    // CLEAR BITS
    USART2->CR2 &= ~(USART_CR2_RTOEN    // DISABLE RECEIVER TIMEOUT             (23)
                    |USART_CR2_ABREN    // NO AUTOMATIC BAUD RATE DETECTION     (20)
                    |USART_CR2_MSBFIRST // TRANSMIT/RECEIVE LSB FIRST           (19)
                    |(0x03 << 16)       // IDLE STATE HIGH FOR RX/TX PINS       (17/16)
                    |USART_CR2_SWAP     // DON'T SWAP FUNCTION OF RX/TX PINS    (15)
                    |USART_CR2_LINEN    // NO LIN MODE                          (14)
                    |(0x03 << 12)       // 1 STOP BIT                           (13/12)
                    |USART_CR2_CLKEN    // DON'T USE CLOCK WITH UART            (11)
                    |USART_CR2_LBDIE);  // NO LIN BREAK DETECTION INTERRUPT     (6)

    // CONFIGURE USART CR3 REGISTER
    // CLEAR BITS
    CLEAR_REG(USART2->CR3);
    // SET BITS
    USART2->CR3 |= (USART_CR3_OVRDIS    // DISABLE OVERRUN FUNCTIONALITY (12)
                   |USART_CR3_ONEBIT);  // USE ONE SAMPLE BIT METHOD     (11)

    // SET BAUD RATE IN BRR REGISTER
    USART2->BRR = 833;                   // 8M/833 = 9600

    // ENABLE UART
    USART2->CR1 |= (USART_CR1_TE        // ENABLE TRANSMITTER (3)
                   |USART_CR1_RE        // ENABLE RECEIVER    (2)
                   |USART_CR1_UE);      // ENABLE UART1       (0)


}

void initUART(void)
{
    initClocks();
    configUart1Pins();
    configUart1();
}

void transmitUart(uint8_t data)     // BYTE OF DATA TO BE TRANSMITTED
{

    while(!(USART2->ISR & USART_ISR_TXE));

    USART2->TDR = data;
}

void transmitStrUart(char* str) // POINTER TO A STRING TO BE TRANSMITTED
{

    while(*str)
    {
         transmitUart(*str++);
    }
}



int main(void)
{

  HAL_Init();
  SystemClock_Config();
  initUART();


  while (1)
  {

    transmitUart(88);
    HAL_Delay(500);


  }

}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}


void Error_Handler(void)
{

  __disable_irq();
  while (1)
  {
  }

}