因为打算用STM32H533做一个分析I2C、SPI时序的小设备，这几天就尝试使用定时器去实现精确计时。在使用CubeMX进行设计的时候，
HCLK是可以设到250MHz，但为了方便后面计算，我在这里设置为100MHz。这样，按照计算，设置Timers的溢出值为10000时，Timer的溢出时间就是1ms。实测结果：
可以看到，多多少少还是有出入的。不知道是不是因为开发板主频太高、亦或是我的示波器能力达不到，总之不是那么理想。后面用这样的计数去计算脉冲宽度，可能会有偏差。
另外在使用CubeIDE的时候，千万不要想着用CubeMX去调整时钟、增减GPIO或者其它外设，生成代码，因为会把你已经做好的工程破坏的面目全非。比如有个stm32h5xx_util_i3c.h文件，没戏用CubeMX生成代码后，都会导致这个文件丢失。我是在原来程序的基础上，利用CubeMX去建立其他工程后，拷贝代码过来，来调整程序的。
目前的主程序代码如下：
/* USER CODE BEGIN Header */
/**
---
* @file : main.c
* @brief : Main program body
---
* @attention
*
* Copyright (c) 2024 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"
**#include** "gui.h"
**#include** "oled.h"
**#define** I3C_IDX_FRAME_1 0U /* Index of Frame 1 */
**#define** I3C_IDX_FRAME_2 1U /* Index of Frame 2 */
I3C_HandleTypeDef hi3c1;
I3C_HandleTypeDef hi3c2;
TIM_HandleTypeDef htim2;
// 与帧上下文相关的上下文缓冲区包含通信的不同缓冲值
I3C_XferTypeDef aContextBuffers[2];
// DAA过程中检测到的目标数量
__IO uint32_t uwTargetCount = 0;
// I3C发送用的缓冲区
uint8_t aTxBuffer[0x0F];
// I3C接收用的缓冲区
uint8_t aRxBuffer[RXBUFFERSIZE];
// HAL用来计算通信的控制数据的缓冲区
uint32_t aControlBuffer[0xF];
/********************/
/* Target Descriptor */
/********************/
TargetDesc_TypeDef TargetDesc1 = {
"TARGET_ID1",
DEVICE_ID1,
0x0000000000000000,
0x00,
TARGET1_DYN_ADDR,
};
/********************/
/* Target Descriptor */
/********************/
TargetDesc_TypeDef TargetDesc2 = {
"TARGET_ID2",
DEVICE_ID2,
0x0000000000000000,
0x00,
TARGET2_DYN_ADDR,
};
// 目标描述符数组
TargetDesc_TypeDef *aTargetDesc[2] = {
&TargetDesc1, /* DEVICE_ID1 */
&TargetDesc2 /* DEVICE_ID2 */
};
/* Variable to catch HotJoin event */
__IO uint32_t uwHotJoinRequested = 0;
/* Buffer that contain payload data, mean PID, BCR, DCR */
uint8_t aPayloadBuffer[64*COUNTOF(aTargetDesc)];
// 设置CCC关联数据的数组
uint8_t aDISEC_data[1] = {0x08};
/* Variable to display reading data */
uint32_t uwDisplayDelay = 0U;
int16_t Temperature = 0;
int16_t aGyroscope[3] = {0};
int16_t aAccelerometer[3] = {0};
// 广播用CCC的描述符
I3C_CCCTypeDef aBroadcast_CCC[] = {
// 目标地址 CCC Value CCC data + defbyte pointer CCC size + defbyte Direction */
{0, Broadcast_DISEC, {aDISEC_data, 1}, LL_I3C_DIRECTION_WRITE},
{0, Broadcast_RSTDAA, {NULL, 0}, LL_I3C_DIRECTION_WRITE},
};
UART_HandleTypeDef huart1;
**void** **SystemClock_Config** (**void** );
**static** **void** **MX_GPIO_Init** (**void** );
**static** **void** **MX_I3C1_Init** (**void** );
**static** **void** **MX_I3C2_Init** (**void** );
**static** **void** **MX_USART1_UART_Init** (**void** );
**static** **void** **MX_TIM2_Init** (**void** );
**static** **void** **EXTI13_IRQHandler_Config** (**void** );
**void** **checkI3CDevice** (**void** );
/**
* @brief The application entry point.
* @retval int
*/
uint8_t flag=0;
**int** **main** (**void** ) {
// 复位所有外设，初始化Flash接口和Systick。
HAL_Init();
// 设置系统时钟
SystemClock_Config();
// 初始化相关外设
MX_GPIO_Init();
MX_I3C1_Init();
MX_I3C2_Init();
MX_USART1_UART_Init();
MX_TIM2_Init();
EXTI13_IRQHandler_Config();
// 初始化OLED并显示信息
OLED_Init();
OLED_Clear(0);
GUI_ShowString(0, 0, (uint8_t*)"Test STM32H533 I3C", 8, 1);
HAL_Delay(100);
**if** (HAL_I3C_ActivateNotification(&hi3c1, NULL, HAL_I3C_IT_HJIE) != *HAL_OK* ) {
/* Error_Handler() function is called when error occurs. */
Error_Handler();
}
**while** (1) {
//checkI3CDevice();
}
}
// 检查是否存在I3C设备（由子设备发出请求，主设备响应后，分发地址）
**void** **checkI3CDevice** (**void** ) {
// 等待目标连接上
**while** (uwHotJoinRequested == 0U) {
// 为热连接启动监听
**if** (flag == 0) {
// I3C2发出连接请求
**if** (HAL_I3C_Tgt_HotJoinReq_IT(&hi3c2) != *HAL_OK* ) {
Error_Handler();
} **else** {
flag = 1;
}
}
}
// 分配动态地址
**if** (HAL_I3C_Ctrl_DynAddrAssign_IT(&hi3c1, I3C_ONLY_ENTDAA) != *HAL_OK* ) {
Error_Handler();
}
// 获取状态
**while** (HAL_I3C_GetState(&hi3c1) != *HAL_I3C_STATE_LISTEN* ) {
}
// 复位，等待捕捉其它I3C设备
uwHotJoinRequested = 0;
}
/**
* @brief System Clock Configuration
* @retval None
*/
// 240MHz
//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_SCALE3);
//
// while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
//
// /** Initializes the RCC Oscillators according to the specified parameters
// * in the RCC_OscInitTypeDef structure.
// */
// RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
// RCC_OscInitStruct.HSIState = RCC_HSI_ON;
// RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV2;
// RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
// RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
// if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
// Error_Handler();
// }
//
// /** Initializes the CPU, AHB and APB buses clocks
// */
// RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
// |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
// |RCC_CLOCKTYPE_PCLK3;
// RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
// RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
// RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
// RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
// RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;
//
// if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
// Error_Handler();
// }
//}
//100MHz
**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_SCALE3);
**while** (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_CSI;
RCC_OscInitStruct.CSIState = RCC_CSI_ON;
RCC_OscInitStruct.CSICalibrationValue = RCC_CSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLL1_SOURCE_CSI;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 50;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1_VCIRANGE_2;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1_VCORANGE_WIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
**if** (HAL_RCC_OscConfig(&RCC_OscInitStruct) != *HAL_OK* )
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_PCLK3;
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.APB3CLKDivider = RCC_HCLK_DIV1;
**if** (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != *HAL_OK* )
{
Error_Handler();
}
}
/**
* @brief I3C1 Initialization Function
* @param None
* @retval None
*/
**static** **void** **MX_I3C1_Init** (**void** ) {
I3C_FifoConfTypeDef sFifoConfig = {0};
I3C_CtrlConfTypeDef sCtrlConfig = {0};
hi3c1.Instance = I3C1;
hi3c1.Mode = *HAL_I3C_MODE_CONTROLLER* ;
hi3c1.Init.CtrlBusCharacteristic.SDAHoldTime = HAL_I3C_SDA_HOLD_TIME_1_5;
hi3c1.Init.CtrlBusCharacteristic.WaitTime = HAL_I3C_OWN_ACTIVITY_STATE_0;
hi3c1.Init.CtrlBusCharacteristic.SCLPPLowDuration = 0x09;
hi3c1.Init.CtrlBusCharacteristic.SCLI3CHighDuration = 0x09;
hi3c1.Init.CtrlBusCharacteristic.SCLODLowDuration = 0x59;
hi3c1.Init.CtrlBusCharacteristic.SCLI2CHighDuration = 0x00;
hi3c1.Init.CtrlBusCharacteristic.BusFreeDuration = 0x32;
hi3c1.Init.CtrlBusCharacteristic.BusIdleDuration = 0xf8;
**if** (HAL_I3C_Init(&hi3c1) != *HAL_OK* )
{
Error_Handler();
}
/** Configure FIFO
*/
sFifoConfig.RxFifoThreshold = HAL_I3C_RXFIFO_THRESHOLD_1_4;
sFifoConfig.TxFifoThreshold = HAL_I3C_TXFIFO_THRESHOLD_1_4;
sFifoConfig.ControlFifo = HAL_I3C_CONTROLFIFO_DISABLE;
sFifoConfig.StatusFifo = HAL_I3C_STATUSFIFO_DISABLE;
**if** (HAL_I3C_SetConfigFifo(&hi3c1, &sFifoConfig) != *HAL_OK* )
{
Error_Handler();
}
/** Configure controller
*/
sCtrlConfig.DynamicAddr = 0;
sCtrlConfig.StallTime = 0x00;
sCtrlConfig.HotJoinAllowed = *ENABLE* ;
sCtrlConfig.ACKStallState = *DISABLE* ;
sCtrlConfig.CCCStallState = *DISABLE* ;
sCtrlConfig.TxStallState = *DISABLE* ;
sCtrlConfig.RxStallState = *DISABLE* ;
sCtrlConfig.HighKeeperSDA = *DISABLE* ;
**if** (HAL_I3C_Ctrl_Config(&hi3c1, &sCtrlConfig) != *HAL_OK* )
{
Error_Handler();
}
}
/**
* @brief I3C2 Initialization Function
* @param None
* @retval None
*/
**static** **void** **MX_I3C2_Init** (**void** ) {
I3C_FifoConfTypeDef sFifoConfig = {0};
I3C_TgtConfTypeDef sTgtConfig = {0};
hi3c2.Instance = I3C2;
hi3c2.Mode = *HAL_I3C_MODE_TARGET* ;
hi3c2.Init.TgtBusCharacteristic.BusAvailableDuration = 0xf8;
**if** (HAL_I3C_Init(&hi3c2) != *HAL_OK* ) {
Error_Handler();
}
/** Configure FIFO
*/
sFifoConfig.RxFifoThreshold = HAL_I3C_RXFIFO_THRESHOLD_1_4;
sFifoConfig.TxFifoThreshold = HAL_I3C_TXFIFO_THRESHOLD_1_4;
sFifoConfig.ControlFifo = HAL_I3C_CONTROLFIFO_DISABLE;
sFifoConfig.StatusFifo = HAL_I3C_STATUSFIFO_DISABLE;
**if** (HAL_I3C_SetConfigFifo(&hi3c2, &sFifoConfig) != *HAL_OK* ) {
Error_Handler();
}
/** Configure Target
*/
sTgtConfig.Identifier = 0xC7;
sTgtConfig.MIPIIdentifier = DEVICE_ID2;
sTgtConfig.CtrlRoleRequest = *DISABLE* ;
sTgtConfig.HotJoinRequest = *ENABLE* ;
sTgtConfig.IBIRequest = *DISABLE* ;
sTgtConfig.IBIPayload = *DISABLE* ;
sTgtConfig.IBIPayloadSize = HAL_I3C_PAYLOAD_EMPTY;
sTgtConfig.MaxReadDataSize = 0xFF;
sTgtConfig.MaxWriteDataSize = 0xFF;
sTgtConfig.CtrlCapability = *DISABLE* ;
sTgtConfig.GroupAddrCapability = *DISABLE* ;
sTgtConfig.DataTurnAroundDuration = HAL_I3C_TURNAROUND_TIME_TSCO_LESS_12NS;
sTgtConfig.MaxReadTurnAround = 0;
sTgtConfig.MaxDataSpeed = HAL_I3C_GETMXDS_FORMAT_1;
sTgtConfig.MaxSpeedLimitation = *DISABLE* ;
sTgtConfig.HandOffActivityState = HAL_I3C_HANDOFF_ACTIVITY_STATE_0;
sTgtConfig.HandOffDelay = *DISABLE* ;
sTgtConfig.PendingReadMDB = *DISABLE* ;
**if** (HAL_I3C_Tgt_Config(&hi3c2, &sTgtConfig) != *HAL_OK* )
{
Error_Handler();
}
}
/**
* @brief TIM2 Initialization Function
* @param None
* @retval None
*/
**static** **void** **MX_TIM2_Init** (**void** )
{
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
/* USER CODE BEGIN TIM2_Init 1 */
/* USER CODE END TIM2_Init 1 */
htim2.Instance = TIM2;
htim2.Init.Prescaler = 0;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 100000; // 100MHz:1mS
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
**if** (HAL_TIM_Base_Init(&htim2) != *HAL_OK* ) {
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
**if** (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != *HAL_OK* ) {
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
**if** (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != *HAL_OK* ) {
Error_Handler();
}
// 允许Timer2中断
HAL_TIM_Base_Start_IT(&htim2);
HAL_NVIC_EnableIRQ(*TIM2_IRQn* );
}
/**
* @brief USART1 Initialization Function
* @param None
* @retval None
*/
**static** **void** **MX_USART1_UART_Init** (**void** ) {
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
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.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
**if** (HAL_UART_Init(&huart1) != *HAL_OK* ) {
Error_Handler();
}
**if** (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != *HAL_OK* ) {
Error_Handler();
}
**if** (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != *HAL_OK* ) {
Error_Handler();
}
**if** (HAL_UARTEx_DisableFifoMode(&huart1) != *HAL_OK* ) {
Error_Handler();
}
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
**static** **void** **MX_GPIO_Init** (**void** ) {
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(USER_LED_GPIO_Port, USER_LED_Pin, *GPIO_PIN_RESET* );
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOA, OLED_SCL_Pin|OLED_SDA_Pin, *GPIO_PIN_SET* );
// 设置用户按钮使用的GPIO口
GPIO_InitStruct.Pin = USER_BUTTON_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(USER_BUTTON_GPIO_Port, &GPIO_InitStruct);
// 设置用户LED按钮使用的GPIO口
GPIO_InitStruct.Pin = USER_LED_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(USER_LED_GPIO_Port, &GPIO_InitStruct);
// 设置OLED使用的接口(模拟方式)
GPIO_InitStruct.Pin = OLED_SCL_Pin|OLED_SDA_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
/**
* @brief 从机请求地址分配的回调函数
* @par Called functions
* - HAL_I3C_TgtReqDynamicAddrCallback()
* - HAL_I3C_Ctrl_SetDynamicAddress()
* @retval None
*/
**void** **HAL_I3C_TgtReqDynamicAddrCallback** (I3C_HandleTypeDef *hi3c, uint64_t targetPayload) {
**printf** ("从机请求地址分配。");
GUI_ShowString(0, 16, (uint8_t*)"ReqAddr", 8, 1);
/* Update Payload on aTargetDesc */
aTargetDesc[uwTargetCount]->TARGET_BCR_DCR_PID = targetPayload;
/* Send associated dynamic address */
HAL_I3C_Ctrl_SetDynAddr(hi3c, aTargetDesc[uwTargetCount++]->DYNAMIC_ADDR);
}
/**
* @brief 控制器完成动态地址的分配的回调函数
* @param hi3c : [IN] 包含配置信息的结构体.
* @retval None
*/
**void** **HAL_I3C_CtrlDAACpltCallback** (I3C_HandleTypeDef *hi3c) {
**printf** ("完成动态地址的分配。");
GUI_ShowString(60, 16, (uint8_t*)"Addr OK", 8, 1);
}
/**
* @brief 收到连接请求后代额回调函数.
* @par Called functions
* - HAL_I3C_NotifyCallback()
* @retval None
*/
**void** **HAL_I3C_NotifyCallback** (I3C_HandleTypeDef *hi3c, uint32_t eventId) {
**if** ((eventId & EVENT_ID_HJ) == EVENT_ID_HJ) {
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
// 建立收到连接请求的标志
**printf** ("收到连接请求！");
GUI_ShowString(0, 8, (uint8_t*)"Notify", 8, 1);
uwHotJoinRequested = 1;
}
}
/**
* @brief 从机（I3C2）连接成功的回调函数.
* 函数目的是为了检查热连接过程是否完成
* @par Called functions
* - HAL_I3C_TgtHotJoinCallback()
* @retval None
*/
**void** **HAL_I3C_TgtHotJoinCallback** (I3C_HandleTypeDef *hi3c, uint8_t dynamicAddress) {
// 从机连上
GUI_ShowString(0, 24, (uint8_t*)"Target Addr=", 8, 1);
GUI_ShowNum(100, 24, dynamicAddress, 2, 8, 1);
**printf** ("Slave is OK! Address=%d", dynamicAddress);
}
/**
* @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 */
__disable_irq();
**while** (1) {
}
/* USER CODE END Error_Handler_Debug */
}
// 定时器2的溢出中断回调函数
**void** **HAL_TIM_PeriodElapsedCallback** (TIM_HandleTypeDef *htim) {
// static unsigned char ledState = 0;
// if (htim == (&htim2)) {
// if (ledState == 0)
// BSP_LED_Off(LED2);
// else
// BSP_LED_On(LED2);
// ledState = !ledState;
// }
BSP_LED_Toggle(LED2);
}
/* USER CODE BEGIN 4 */
/**
* @brief Configures EXTI line 13 (connected to PC.13 pin) in interrupt mode
* @param None
* @retval None
*/
**static** **void** **EXTI13_IRQHandler_Config** (**void** )
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIOC clock */
__HAL_RCC_GPIOC_CLK_ENABLE();
/* Configure PC.13 pin as input floating */
GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING_FALLING; //GPIO_MODE_IT_FALLING;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Pin = BUTTON_USER_PIN;
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
/* Enable and set line 13 Interrupt to the lowest priority */
HAL_NVIC_SetPriority(*EXTI13_IRQn* , 2, 0);
HAL_NVIC_EnableIRQ(*EXTI13_IRQn* );
}
**void** **HAL_GPIO_EXTI_Rising_Callback** (uint16_t GPIO_Pin) {
// 判断是不是来自PC13的
**if** (GPIO_Pin == BUTTON_USER_PIN) {
/* Toggle LED2 */
BSP_LED_On(LED2);
}
}
**void** **HAL_GPIO_EXTI_Falling_Callback** (uint16_t GPIO_Pin) {
// 判断是不是来自PC13的
**if** (GPIO_Pin == BUTTON_USER_PIN) {
/* Toggle LED2 */
BSP_LED_Off(LED2);
}
}
**#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) */
/* USER CODE END 6 */
}
**#endif** /* USE_FULL_ASSERT */
程序里加了开发板上用户按钮的上升沿和下降沿中断。后面制作辅助设备，还需要很多按钮。这次的程序主要就是为了产生计时器，后面继续追加按钮、菜单方面的操作。
