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STM32CubeWL/Projects/NUCLEO-WL55JC/Examples/UART/UART_WakeUpFromStopUsingFIFO/Src/main.c

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file UART/UART_WakeUpFromStopUsingFIFO/Src/main.c
* @author MCD Application Team
* @brief This sample code shows how to use UART HAL API (UART instance)
* to wake up the MCU from STOP mode using the UART FIFO level.
* Two boards are used, one which enters STOP mode and the second
* one which sends the wake-up stimuli.
******************************************************************************
* @attention
*
* Copyright (c) 2020 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stm32wlxx_nucleo.h"
/* 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 */
#define HAL_TIMEOUT_VALUE 0xFFFFFFFF
#define countof(a) (sizeof(a) / sizeof(*(a)))
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef hlpuart1;
/* USER CODE BEGIN PV */
uint8_t HeaderTxBuffer[] = "\r\nLPUART1 WakeUp from stop mode using FIFO\r\n";
uint8_t Part1TxBuffer[] = "\r\n\t Part 1: RXFIFO threshold interrupt\r\n Waiting for characters reception until RX FIFO threshold is reached\r\n Please send 2 bytes\r\n";
uint8_t WakeupRXFTBuffer[] = "\r\n Proper wakeup based on RXFIFO threshold interrupt detection.\r\n";
uint8_t Part2TxBuffer[] = "\r\n\t Part 2: RXFIFO full interrupt\r\n Waiting for characters reception until RX FIFO is Full \r\n Please send 8 bytes\r\n";
uint8_t WakeupRXFFBuffer[] = "\r\n Proper wakeup based on RXFIFO full interrupt detection.\r\n";
uint8_t FooterTxBuffer[] = "\r\nExample finished successfully\r\n";
uint8_t RxBuffer[8];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_LPUART1_UART_Init(void);
/* USER CODE BEGIN PFP */
static void EXTI28_Wakeup_Enable(void);
void SystemClock_Config_fromSTOP(void);
/* 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. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* Initialize BSP LED */
BSP_LED_Init(LED2);
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_LPUART1_UART_Init();
/* USER CODE BEGIN 2 */
/* Turn LED2 on */
BSP_LED_On(LED2);
/* Specify HSI as the clock source used after wake up from stop mode */
__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_STOP_WAKEUPCLOCK_HSI);
/*##########################################################################*/
/*##-1- Wakeup first step RXFT #############################################*/
/*##########################################################################*/
/* Output message on hyperterminal */
HAL_UART_Transmit(&hlpuart1, (uint8_t*)&HeaderTxBuffer, countof(HeaderTxBuffer)-1, HAL_TIMEOUT_VALUE);
/* Enable MCU wakeup by LPUART1 */
HAL_UARTEx_EnableStopMode(&hlpuart1);
/* Unmask wakeup with Interrupt request from LPUART1 */
EXTI28_Wakeup_Enable();
/* Enable the LPUART1 RX FIFO threshold interrupt */
__HAL_UART_ENABLE_IT(&hlpuart1, UART_IT_RXFT);
/* Enable the LPUART1 wakeup from stop mode interrupt */
__HAL_UART_ENABLE_IT(&hlpuart1, UART_IT_WUF);
/* Output message on hyperterminal */
HAL_UART_Transmit(&hlpuart1, (uint8_t*)&Part1TxBuffer, countof(Part1TxBuffer)-1, HAL_TIMEOUT_VALUE);
/* Put LPUART1 peripheral in reception process */
HAL_UART_Receive_IT(&hlpuart1, (uint8_t*)&RxBuffer, 2);
/* Turn LED2 off */
BSP_LED_Off(LED2);
/* Enter STOP mode */
HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON,PWR_STOPENTRY_WFI);
/* ... STOP Mode ... */
/* Call SystemClock_Config for the wake up from stop clock */
SystemClock_Config_fromSTOP();
/* Turn LED2 on */
BSP_LED_On(LED2);
while(HAL_UART_GetState(&hlpuart1) != HAL_UART_STATE_READY)
{
}
/* Disable the LPUART1 wakeup from stop mode interrupt */
__HAL_UART_DISABLE_IT(&hlpuart1, UART_IT_WUF);
/* Disable the LPUART1 RX FIFO threshold interrupt */
__HAL_UART_DISABLE_IT(&hlpuart1, UART_IT_RXFT);
/* Disable LPUART1 Stop Mode */
HAL_UARTEx_DisableStopMode(&hlpuart1);
/* Output message on hyperterminal */
HAL_UART_Transmit(&hlpuart1, (uint8_t*)&WakeupRXFTBuffer, countof(WakeupRXFTBuffer)-1, HAL_TIMEOUT_VALUE);
/*##########################################################################*/
/*##-2- Wakeup second step RXFF ############################################*/
/*##########################################################################*/
/* Update Rx FIFO threshold */
if (HAL_UARTEx_SetRxFifoThreshold(&hlpuart1, UART_RXFIFO_THRESHOLD_8_8) != HAL_OK)
{
Error_Handler();
}
/* Enable MCU wakeup by LPUART1 */
HAL_UARTEx_EnableStopMode(&hlpuart1);
/* Enable the LPUART1 RX FIFO full interrupt */
__HAL_UART_ENABLE_IT(&hlpuart1, UART_IT_RXFF);
/* Enable the LPUART1 wakeup from stop mode interrupt */
__HAL_UART_ENABLE_IT(&hlpuart1, UART_IT_WUF);
/* Output message on hyperterminal */
HAL_UART_Transmit(&hlpuart1, (uint8_t*)&Part2TxBuffer, countof(Part2TxBuffer)-1, HAL_TIMEOUT_VALUE);
/* Put LPUART1 peripheral in reception process */
HAL_UART_Receive_IT(&hlpuart1, (uint8_t*)&RxBuffer, 8);
/* Turn LED2 off */
BSP_LED_Off(LED2);
/* Enter STOP mode */
HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON,PWR_STOPENTRY_WFI);
/* ... STOP Mode ... */
/* Turn LED2 on */
BSP_LED_On(LED2);
/* Call SystemClock_Config for the wake up from stop clock */
SystemClock_Config_fromSTOP();
while(HAL_UART_GetState(&hlpuart1) != HAL_UART_STATE_READY)
{
}
/* Disable the LPUART1 wakeup from stop mode interrupt */
__HAL_UART_DISABLE_IT(&hlpuart1, UART_IT_WUF);
/* Disable the LPUART1 RX FIFO full interrupt */
__HAL_UART_DISABLE_IT(&hlpuart1, UART_IT_RXFF);
/* Disable LPUART1 Stop Mode */
HAL_UARTEx_DisableStopMode(&hlpuart1);
/* Output message on hyperterminal */
HAL_UART_Transmit(&hlpuart1, (uint8_t*)&WakeupRXFFBuffer, countof(WakeupRXFFBuffer)-1, HAL_TIMEOUT_VALUE);
/*##########################################################################*/
/*##-3- Successful test ####################################################*/
/*##########################################################################*/
/* Output message on hyperterminal */
HAL_UART_Transmit(&hlpuart1, (uint8_t*)&FooterTxBuffer, countof(FooterTxBuffer)-1, HAL_TIMEOUT_VALUE);
/* 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)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB buses clocks
*/
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 = RCC_PLLM_DIV4;
RCC_OscInitStruct.PLL.PLLN = 24;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|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_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief LPUART1 Initialization Function
* @param None
* @retval None
*/
static void MX_LPUART1_UART_Init(void)
{
/* USER CODE BEGIN LPUART1_Init 0 */
/* USER CODE END LPUART1_Init 0 */
/* USER CODE BEGIN LPUART1_Init 1 */
/* USER CODE END LPUART1_Init 1 */
hlpuart1.Instance = LPUART1;
hlpuart1.Init.BaudRate = 115200;
hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;
hlpuart1.Init.StopBits = UART_STOPBITS_1;
hlpuart1.Init.Parity = UART_PARITY_ODD;
hlpuart1.Init.Mode = UART_MODE_TX_RX;
hlpuart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
hlpuart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
hlpuart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
hlpuart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
hlpuart1.FifoMode = UART_FIFOMODE_ENABLE;
if (HAL_UART_Init(&hlpuart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&hlpuart1, UART_TXFIFO_THRESHOLD_1_4) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&hlpuart1, UART_RXFIFO_THRESHOLD_1_4) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_EnableFifoMode(&hlpuart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN LPUART1_Init 2 */
/* USER CODE END LPUART1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
}
/* USER CODE BEGIN 4 */
static void EXTI28_Wakeup_Enable(void)
{
EXTI_HandleTypeDef hexti;
EXTI_ConfigTypeDef exticonfig;
exticonfig.Line = EXTI_LINE_28;
exticonfig.Mode = EXTI_MODE_INTERRUPT;
HAL_EXTI_SetConfigLine(&hexti,&exticonfig);
}
void SystemClock_Config_fromSTOP(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
uint32_t pFLatency = 0;
/* Get the Oscillators configuration from the internal RCC registers */
HAL_RCC_GetOscConfig(&RCC_OscInitStruct);
/* Wake up on HSI, re-enable PLL with HSI as source */
/* Oscillator configuration unchanged */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/* Get the clock prescalers configuration from the internal RCC registers */
HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &pFLatency);
/* Select PLL as system clock source */
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, pFLatency) != HAL_OK)
{
Error_Handler();
}
}
/* 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 */
while (1)
{
/* In case of error, LED2 transmits a sequence of three dots, three dashes, three dots */
BSP_LED_On(LED2);
HAL_Delay(300);
BSP_LED_Off(LED2);
HAL_Delay(300);
BSP_LED_On(LED2);
HAL_Delay(300);
BSP_LED_Off(LED2);
HAL_Delay(300);
BSP_LED_On(LED2);
HAL_Delay(300);
BSP_LED_Off(LED2);
HAL_Delay(300);
BSP_LED_On(LED2);
HAL_Delay(700);
BSP_LED_Off(LED2);
HAL_Delay(700);
BSP_LED_On(LED2);
HAL_Delay(700);
BSP_LED_Off(LED2);
HAL_Delay(700);
BSP_LED_On(LED2);
HAL_Delay(700);
BSP_LED_Off(LED2);
HAL_Delay(700);
BSP_LED_On(LED2);
HAL_Delay(300);
BSP_LED_Off(LED2);
HAL_Delay(300);
BSP_LED_On(LED2);
HAL_Delay(300);
BSP_LED_Off(LED2);
HAL_Delay(300);
BSP_LED_On(LED2);
HAL_Delay(300);
BSP_LED_Off(LED2);
HAL_Delay(800);
}
/* 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,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{}
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
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