STM32L496VGT6 - Does anyone know for a fact that receive works on USART3? Please no "assumptions" -- I already did that.

void USART3_Init(void) // USART3 PD8/PD9
 {
 UART_HandleTypeDef UartHandle = {0};
 GPIO_InitTypeDef GPIO_InitStruct = {0};
 
 /*##-1- Enable peripherals and GPIO Clocks #################################*/
 /* Enable GPIO TX/RX clock */
 __HAL_RCC_GPIOD_CLK_ENABLE();
 
 /* Enable USARTx clock */
 __HAL_RCC_USART3_CLK_ENABLE();
 
 /*##-2- Configure peripheral GPIO ##########################################*/
 /* UART TX/RX GPIO pin configuration */
 GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_PULLUP;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
 GPIO_InitStruct.Alternate = GPIO_AF7_USART3;
 
 HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
 
/*##-1- Configure the UART peripheral ######################################*/
 /* Put the USART peripheral in the Asynchronous mode (UART Mode) */
 UartHandle.Instance = USART3;
 
 UartHandle.Init.BaudRate = 38400;
 UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
 UartHandle.Init.StopBits = UART_STOPBITS_1;
 UartHandle.Init.Parity = UART_PARITY_NONE;
 UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
 UartHandle.Init.Mode = UART_MODE_TX_RX;
 UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
 
 if (HAL_UART_Init(&UartHandle) != HAL_OK)
 {
 /* Initialization Error */
 Error_Handler();
 }
} // sourcer32@gmail.com