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+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * @file Examples_LL/USART/USART_Communication_Tx_IT_Init/Src/main.c
+ * @author MCD Application Team
+ * @brief This example describes how to send bytes over USART IP using
+ * the STM32WBxx USART LL API.
+ * Peripheral initialization done using LL unitary services functions.
+ ******************************************************************************
+ * @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
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Private typedef -----------------------------------------------------------*/
+/* USER CODE BEGIN PTD */
+
+/* USER CODE END PTD */
+
+/* Private define ------------------------------------------------------------*/
+/* USER CODE BEGIN PD */
+
+/* USER CODE END PD */
+
+/* Private macro -------------------------------------------------------------*/
+/* USER CODE BEGIN PM */
+
+/* USER CODE END PM */
+
+/* Private variables ---------------------------------------------------------*/
+
+/* USER CODE BEGIN PV */
+
+__IO uint8_t ubButtonPress = 0;
+__IO uint8_t ubSend = 0;
+const uint8_t aStringToSend[] = "STM32WBxx USART LL API Example : TX in IT mode\r\nConfiguration UART 115200 bps, 8 data bit/1 stop bit/No parity/No HW flow control\r\n";
+uint8_t ubSizeToSend = sizeof(aStringToSend);
+
+/* USER CODE END PV */
+
+/* Private function prototypes -----------------------------------------------*/
+void SystemClock_Config(void);
+static void MX_GPIO_Init(void);
+static void MX_USART1_UART_Init(void);
+/* USER CODE BEGIN PFP */
+void LED_On(void);
+void LED_Off(void);
+void LED_Blinking(uint32_t Period);
+
+/* USER CODE END PFP */
+
+/* Private user code ---------------------------------------------------------*/
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/**
+ * @brief The application entry point.
+ * @retval int
+ */
+int main(void)
+{
+ /* USER CODE BEGIN 1 */
+ /* USER CODE END 1 */
+
+ /* MCU Configuration--------------------------------------------------------*/
+
+ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
+
+
+ NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
+
+ /* System interrupt init*/
+
+ /* USER CODE BEGIN Init */
+
+ /* USER CODE END Init */
+
+ /* Configure the system clock */
+ SystemClock_Config();
+
+ /* USER CODE BEGIN SysInit */
+
+ /* USER CODE END SysInit */
+
+ /* Initialize all configured peripherals */
+ MX_GPIO_Init();
+ MX_USART1_UART_Init();
+ /* USER CODE BEGIN 2 */
+
+ /* Polling USART initialisation */
+ while ((!(LL_USART_IsActiveFlag_TEACK(USART1))) || (!(LL_USART_IsActiveFlag_REACK(USART1))))
+ {
+ }
+
+ /* Enable RXNE and Error interrupts */
+ LL_USART_EnableIT_RXNE(USART1);
+ LL_USART_EnableIT_ERROR(USART1);
+
+ /* Set LED2 Off */
+ LED_Off();
+
+ /* USER CODE END 2 */
+
+ /* Infinite loop */
+ /* USER CODE BEGIN WHILE */
+ while (1)
+ {
+ /* USER CODE END WHILE */
+
+ /* USER CODE BEGIN 3 */
+ }
+ /* USER CODE END 3 */
+}
+
+/**
+ * @brief System Clock Configuration
+ * @retval None
+ */
+void SystemClock_Config(void)
+{
+ LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
+
+ /* MSI configuration and activation */
+ LL_RCC_MSI_Enable();
+ while(LL_RCC_MSI_IsReady() != 1)
+ {
+ };
+
+ /* Main PLL configuration and activation */
+ LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_MSI, LL_RCC_PLLM_DIV_1, 32, LL_RCC_PLLR_DIV_2);
+ LL_RCC_PLL_Enable();
+ LL_RCC_PLL_EnableDomain_SYS();
+ while(LL_RCC_PLL_IsReady() != 1)
+ {
+ };
+
+ /* Sysclk activation on the main PLL */
+ /* Set CPU1 prescaler*/
+ LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
+
+ /* Set CPU2 prescaler*/
+ LL_C2_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_2);
+
+ LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
+ while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
+ {
+ };
+
+ /* Set AHB SHARED prescaler*/
+ LL_RCC_SetAHB4Prescaler(LL_RCC_SYSCLK_DIV_1);
+
+ /* Set APB1 prescaler*/
+ LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
+
+ /* Set APB2 prescaler*/
+ LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
+
+ LL_Init1msTick(64000000);
+
+ /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
+ LL_SetSystemCoreClock(64000000);
+ /* USER CODE BEGIN Smps */
+
+ /* USER CODE END Smps */
+}
+
+/**
+ * @brief USART1 Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_USART1_UART_Init(void)
+{
+
+ /* USER CODE BEGIN USART1_Init 0 */
+
+ /* USER CODE END USART1_Init 0 */
+
+ LL_USART_InitTypeDef USART_InitStruct = {0};
+
+ LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
+
+ /* Peripheral clock enable */
+ LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_USART1);
+
+ LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
+ /**USART1 GPIO Configuration
+ PA9 ------> USART1_TX
+ PA10 ------> USART1_RX
+ */
+ GPIO_InitStruct.Pin = LL_GPIO_PIN_9|LL_GPIO_PIN_10;
+ GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
+ GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
+ GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
+ GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
+ GPIO_InitStruct.Alternate = LL_GPIO_AF_7;
+ LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+ /* USART1 interrupt Init */
+ NVIC_SetPriority(USART1_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
+ NVIC_EnableIRQ(USART1_IRQn);
+
+ /* USER CODE BEGIN USART1_Init 1 */
+
+ /* USER CODE END USART1_Init 1 */
+ USART_InitStruct.PrescalerValue = LL_USART_PRESCALER_DIV1;
+ USART_InitStruct.BaudRate = 115200;
+ USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
+ USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
+ USART_InitStruct.Parity = LL_USART_PARITY_NONE;
+ USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
+ USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
+ USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;
+ LL_USART_Init(USART1, &USART_InitStruct);
+ LL_USART_SetTXFIFOThreshold(USART1, LL_USART_FIFOTHRESHOLD_1_8);
+ LL_USART_SetRXFIFOThreshold(USART1, LL_USART_FIFOTHRESHOLD_1_8);
+ LL_USART_DisableFIFO(USART1);
+ LL_USART_ConfigAsyncMode(USART1);
+
+ /* USER CODE BEGIN WKUPType USART1 */
+
+ /* USER CODE END WKUPType USART1 */
+
+ LL_USART_Enable(USART1);
+
+ /* Polling USART1 initialisation */
+ while((!(LL_USART_IsActiveFlag_TEACK(USART1))) || (!(LL_USART_IsActiveFlag_REACK(USART1))))
+ {
+ }
+ /* USER CODE BEGIN USART1_Init 2 */
+
+ /* USER CODE END USART1_Init 2 */
+
+}
+
+/**
+ * @brief GPIO Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_GPIO_Init(void)
+{
+ LL_EXTI_InitTypeDef EXTI_InitStruct = {0};
+ LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
+
+ /* GPIO Ports Clock Enable */
+ LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
+ LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
+
+ /**/
+ LL_GPIO_ResetOutputPin(LED2_GPIO_Port, LED2_Pin);
+
+ /**/
+ LL_SYSCFG_SetEXTISource(LL_SYSCFG_EXTI_PORTA, LL_SYSCFG_EXTI_LINE0);
+
+ /**/
+ EXTI_InitStruct.Line_0_31 = LL_EXTI_LINE_0;
+ EXTI_InitStruct.Line_32_63 = LL_EXTI_LINE_NONE;
+ EXTI_InitStruct.LineCommand = ENABLE;
+ EXTI_InitStruct.Mode = LL_EXTI_MODE_IT;
+ EXTI_InitStruct.Trigger = LL_EXTI_TRIGGER_FALLING;
+ LL_EXTI_Init(&EXTI_InitStruct);
+
+ /**/
+ LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_0, LL_GPIO_PULL_UP);
+
+ /**/
+ LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_0, LL_GPIO_MODE_INPUT);
+
+ /**/
+ GPIO_InitStruct.Pin = LED2_Pin;
+ GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
+ GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
+ GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
+ GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
+ LL_GPIO_Init(LED2_GPIO_Port, &GPIO_InitStruct);
+
+ /* EXTI interrupt init*/
+ NVIC_SetPriority(EXTI0_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
+ NVIC_EnableIRQ(EXTI0_IRQn);
+
+}
+
+/* USER CODE BEGIN 4 */
+
+/**
+ * @brief Turn-on LED2.
+ * @param None
+ * @retval None
+ */
+void LED_On(void)
+{
+ /* Turn LED2 on */
+ LL_GPIO_SetOutputPin(LED2_GPIO_Port, LED2_Pin);
+}
+
+/**
+ * @brief Turn-off LED2.
+ * @param None
+ * @retval None
+ */
+void LED_Off(void)
+{
+ /* Turn LED2 off */
+ LL_GPIO_ResetOutputPin(LED2_GPIO_Port, LED2_Pin);
+}
+
+/**
+ * @brief Set LED2 to Blinking mode for an infinite loop (toggle period based on value provided as input parameter).
+ * @param Period : Period of time (in ms) between each toggling of LED
+ * This parameter can be user defined values. Pre-defined values used in that example are :
+ * @arg LED_BLINK_FAST : Fast Blinking
+ * @arg LED_BLINK_SLOW : Slow Blinking
+ * @arg LED_BLINK_ERROR : Error specific Blinking
+ * @retval None
+ */
+void LED_Blinking(uint32_t Period)
+{
+ /* Toggle LED2 in an infinite loop */
+ while (1)
+ {
+ LL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
+ LL_mDelay(Period);
+ }
+}
+
+/******************************************************************************/
+/* USER IRQ HANDLER TREATMENT Functions */
+/******************************************************************************/
+/**
+ * @brief Function to manage User push-button (SW1)
+ * @param None
+ * @retval None
+ */
+void UserButton_Callback(void)
+{
+ /* Start transfer only if not already ongoing */
+ if (ubSend == 0)
+ {
+ /* Start USART transmission : Will initiate TXE interrupt after TDR register is empty */
+ LL_USART_TransmitData8(USART1, aStringToSend[ubSend++]);
+
+ /* Enable TXE interrupt */
+ LL_USART_EnableIT_TXE(USART1);
+ }
+}
+
+/**
+ * @brief Function called for achieving next TX Byte sending
+ * @param None
+ * @retval None
+ */
+void USART_TXEmpty_Callback(void)
+{
+ if (ubSend == (ubSizeToSend - 1))
+ {
+ /* Disable TXE interrupt */
+ LL_USART_DisableIT_TXE(USART1);
+
+ /* Enable TC interrupt */
+ LL_USART_EnableIT_TC(USART1);
+ }
+
+ /* Fill TDR with a new char */
+ LL_USART_TransmitData8(USART1, aStringToSend[ubSend++]);
+}
+
+/**
+ * @brief Function called at completion of last byte transmission
+ * @param None
+ * @retval None
+ */
+void USART_CharTransmitComplete_Callback(void)
+{
+ if (ubSend == sizeof(aStringToSend))
+ {
+ ubSend = 0;
+
+ /* Disable TC interrupt */
+ LL_USART_DisableIT_TC(USART1);
+
+ /* Turn LED2 On at end of transfer : Tx sequence completed successfully */
+ LED_On();
+ }
+}
+
+/**
+ * @brief Function called in case of error detected in USART IT Handler
+ * @param None
+ * @retval None
+ */
+void Error_Callback(void)
+{
+ __IO uint32_t isr_reg;
+
+ /* Disable USARTx_IRQn */
+ NVIC_DisableIRQ(USART1_IRQn);
+
+ /* Error handling example :
+ - Read USART ISR register to identify flag that leads to IT raising
+ - Perform corresponding error handling treatment according to flag
+ */
+ isr_reg = LL_USART_ReadReg(USART1, ISR);
+ if (isr_reg & LL_USART_ISR_NE)
+ {
+ /* case Noise Error flag is raised : ... */
+ LED_Blinking(LED_BLINK_FAST);
+ }
+ else
+ {
+ /* Unexpected IT source : Set LED to Blinking mode to indicate error occurs */
+ LED_Blinking(LED_BLINK_ERROR);
+ }
+}
+
+
+/* USER CODE END 4 */
+
+/**
+ * @brief This function is executed in case of error occurrence.
+ * @retval None
+ */
+void Error_Handler(void)
+{
+ /* USER CODE BEGIN Error_Handler_Debug */
+ /* User can add his own implementation to report the HAL error return state */
+
+ /* USER CODE END Error_Handler_Debug */
+}
+
+#ifdef USE_FULL_ASSERT
+/**
+ * @brief Reports the name of the source file and the source line number
+ * where the assert_param error has occurred.
+ * @param file: pointer to the source file name
+ * @param line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(uint8_t *file, uint32_t line)
+{
+ /* USER CODE BEGIN 6 */
+ /* User can add his own implementation to report the file name and line number,
+ tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+ /* USER CODE END 6 */
+}
+#endif /* USE_FULL_ASSERT */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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