关于I2C寄存器中的SB位是针对master 的状态，可以从参考手册中找到。 另外，根据I2C通讯标准，从机是不能主动发起通讯的，是由主机发起读命令后，从机才可以发数据出来的。
谢谢回复！问题已解决。 上位机调用.dat后，再逐次读取隐藏的CMD页面信息。依此判断芯片烧录进展，主要代码如下： string cmd = txtInput_CMD.Text; cmd = cmd.Trim().TrimEnd('&') + "&exit";//说明：不管命令是否成功均执行exit命令，否则当调用ReadToEnd()方法时，会处于假死状态 using (Process p = new Process()) { p.StartInfo.FileName = @"你的文件路径\CMD.bat” p.StartInfo.UseShellExecute = false; //是否使用操作系统shell启动 p.StartInfo.RedirectStandardInput = true; //接受来自调用程序的输入信息 p.StartInfo.RedirectStandardOutput = true; //由调用程序获取输出信息 p.StartInfo.RedirectStandardError = true; //重定向标准错误输出 //p.StartInfo.Arguments = string.Format("10");//this is argument p.StartInfo.CreateNoWindow = true; //不显示程序窗口 p.Start();//启动程序 //向cmd窗口写入命令 p.StandardInput.WriteLine(cmd); p.StandardInput.AutoFlush = true; //获取cmd窗口的输出信息 StreamReader reader = p.StandardOutput;//截取输出流 string line = reader.ReadLine();//每次读取一行 txtRX_CMD_Info.AppendText(line + "\n"); while (!reader.EndOfStream) { line = reader.ReadLine(); txtRX_CMD_Info.AppendText(line + "\n"); } p.WaitForExit();//等待程序执行完退出进程 p.Close(); }
最好还是先用示波器看看实际发送的数据是否正确，尤其是波特率是否正确。 很多时候由于波特率的偏差，串口助手收到的数据未必正确。其次也可以看看两边的配置模式是否一致，尤其是串口助手的配置
可以用，这部分GPIO初始化也似乎没有问题。 这种早期的STM32在这个功能上面，有bug。 解决的办法，是在每次修改引脚的状态之前，再进行一次转换设定: GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable,ENABLE); GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE); （可能只用一条，AFIO的时钟不能关）
你好，可以详细说一下操作步骤吗？ 我现在有两个按键，通过中断的方式得知按键是否按下，按键按下触发中断，对一个uint8_t类型的叫keyValue的全局变量赋值，来表示我按下了哪个按键，如果按照我发问的截图那样设置hardware button is clicked ，如下图所示文件会有一个handleKeyEvent函数，我想知道我应该如何操作才可以在Model::tick()中把我的keyValue的值传递给handleKeyEvent函数，最终实现页面的切换
楼主，STM32CUBEIDE的项目，怎么重构造printf函数啊！我这边按百度的方法都不行！ https://blog.csdn.net/qq_42212961/article/details/105803129 STM32CUBEIDE版本是1.5.0，编译不报错，调试运行到那就会跳转到延迟函数去~~ 以下是代码 /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * © Copyright (c) 2021 STMicroelectronics. * All rights reserved. * * 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 */ #include "stdio.h" /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ // 重定向printf start ////_write函數在syscalls.c中， 使用__weak定義， 所以可以直接在其他文件中定義_write函數 //__attribute__((weak)) int _write(int file, char *ptr, int len) //{ // if(HAL_UART_Transmit(&huart2,ptr,len,0xffff) != HAL_OK) // { // Error_Handler(); // } //} /* 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 ---------------------------------------------------------*/ ADC_HandleTypeDef hadc1; DMA_HandleTypeDef hdma_adc1; CRC_HandleTypeDef hcrc; I2C_HandleTypeDef hi2c1; IWDG_HandleTypeDef hiwdg; TIM_HandleTypeDef htim3; UART_HandleTypeDef huart1; UART_HandleTypeDef huart2; DMA_HandleTypeDef hdma_usart1_tx; DMA_HandleTypeDef hdma_usart1_rx; /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_DMA_Init(void); static void MX_USART1_UART_Init(void); static void MX_ADC1_Init(void); static void MX_I2C1_Init(void); static void MX_USART2_UART_Init(void); static void MX_IWDG_Init(void); static void MX_CRC_Init(void); static void MX_TIM3_Init(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ static uint32_t fac_us=17; #ifdef __GNUC__ /* With GCC, small printf (option LD Linker->Libraries->Small printf set to 'Yes') calls __io_putchar() */ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif /* __GNUC__ */ PUTCHAR_PROTOTYPE { HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF); return ch; } /* 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 */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_DMA_Init(); MX_USART1_UART_Init(); MX_ADC1_Init(); MX_I2C1_Init(); MX_USART2_UART_Init(); MX_IWDG_Init(); MX_CRC_Init(); MX_TIM3_Init(); /* USER CODE BEGIN 2 */ /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ HAL_GPIO_WritePin(WARN_GPIO_Port, WARN_Pin,GPIO_PIN_SET); printf("123456"); HAL_GPIO_WritePin(WARN_GPIO_Port, WARN_Pin,GPIO_PIN_SET); delay_ms(1000); HAL_GPIO_WritePin(WARN_GPIO_Port, WARN_Pin,GPIO_PIN_RESET); delay_ms(1000); HAL_GPIO_WritePin(WARN_GPIO_Port, WARN_Pin,GPIO_PIN_SET); } /* USER CODE END 3 */ } /** * @brief System Clock Configuration * @retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_PeriphCLKInitTypeDef PeriphClkInit = {0}; /** Configure the main internal regulator output voltage */ HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1); /** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.LSIState = RCC_LSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1; RCC_OscInitStruct.PLL.PLLN = 12; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV6; RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV3; 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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV2; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) { Error_Handler(); } /** Initializes the peripherals clocks */ eriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_I2C1 |RCC_PERIPHCLK_ADC; eriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1; eriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_PCLK1; eriphClkInit.AdcClockSelection = RCC_ADCCLKSOURCE_PLLADC; if (HAL_RCCEx_PeriphCLKConfig(&eriphClkInit) != HAL_OK) { Error_Handler(); } } /** * @brief ADC1 Initialization Function * @param None * @retval None */ static void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_AnalogWDGConfTypeDef AnalogWDGConfig = {0}; ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) */ hadc1.Instance = ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1; hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; hadc1.Init.LowPowerAutoWait = DISABLE; hadc1.Init.LowPowerAutoPowerOff = DISABLE; hadc1.Init.ContinuousConvMode = DISABLE; hadc1.Init.NbrOfConversion = 3; hadc1.Init.DiscontinuousConvMode = DISABLE; hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; hadc1.Init.DMAContinuousRequests = DISABLE; hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED; hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_7CYCLES_5; hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_7CYCLES_5; hadc1.Init.OversamplingMode = ENABLE; hadc1.Init.Oversampling.Ratio = ADC_OVERSAMPLING_RATIO_64; hadc1.Init.Oversampling.RightBitShift = ADC_RIGHTBITSHIFT_3; hadc1.Init.Oversampling.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER; hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH; if (HAL_ADC_Init(&hadc1) != HAL_OK) { Error_Handler(); } /** Configure Analog WatchDog 1 */ AnalogWDGConfig.WatchdogNumber = ADC_ANALOGWATCHDOG_1; AnalogWDGConfig.WatchdogMode = ADC_ANALOGWATCHDOG_SINGLE_REG; AnalogWDGConfig.Channel = ADC_CHANNEL_5; AnalogWDGConfig.ITMode = DISABLE; AnalogWDGConfig.HighThreshold = 0; AnalogWDGConfig.LowThreshold = 0; if (HAL_ADC_AnalogWDGConfig(&hadc1, &AnalogWDGConfig) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_5; sConfig.Rank = ADC_REGULAR_RANK_1; sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_6; sConfig.Rank = ADC_REGULAR_RANK_2; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_8; sConfig.Rank = ADC_REGULAR_RANK_3; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC1_Init 2 */ /* USER CODE END ADC1_Init 2 */ } /** * @brief CRC Initialization Function * @param None * @retval None */ static void MX_CRC_Init(void) { /* USER CODE BEGIN CRC_Init 0 */ /* USER CODE END CRC_Init 0 */ /* USER CODE BEGIN CRC_Init 1 */ /* USER CODE END CRC_Init 1 */ hcrc.Instance = CRC; hcrc.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_DISABLE; hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE; hcrc.Init.GeneratingPolynomial = 16387; hcrc.Init.CRCLength = CRC_POLYLENGTH_16B; hcrc.Init.InitValue = 0xffff; hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE; hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE; hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES; if (HAL_CRC_Init(&hcrc) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN CRC_Init 2 */ /* USER CODE END CRC_Init 2 */ } /** * @brief I2C1 Initialization Function * @param None * @retval None */ static void MX_I2C1_Init(void) { /* USER CODE BEGIN I2C1_Init 0 */ /* USER CODE END I2C1_Init 0 */ /* USER CODE BEGIN I2C1_Init 1 */ /* USER CODE END I2C1_Init 1 */ hi2c1.Instance = I2C1; hi2c1.Init.Timing = 0x00303D5B; hi2c1.Init.OwnAddress1 = 0; hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; hi2c1.Init.OwnAddress2 = 0; hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK; hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE; hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE; if (HAL_I2C_Init(&hi2c1) != HAL_OK) { Error_Handler(); } /** Configure Analogue filter */ if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK) { Error_Handler(); } /** Configure Digital filter */ if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN I2C1_Init 2 */ /* USER CODE END I2C1_Init 2 */ } /** * @brief IWDG Initialization Function * @param None * @retval None */ static void MX_IWDG_Init(void) { /* USER CODE BEGIN IWDG_Init 0 */ /* USER CODE END IWDG_Init 0 */ /* USER CODE BEGIN IWDG_Init 1 */ /* USER CODE END IWDG_Init 1 */ hiwdg.Instance = IWDG; hiwdg.Init.Prescaler = IWDG_PRESCALER_32; hiwdg.Init.Window = 4095; hiwdg.Init.Reload = 4095; if (HAL_IWDG_Init(&hiwdg) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN IWDG_Init 2 */ /* USER CODE END IWDG_Init 2 */ } /** * @brief TIM3 Initialization Function * @param None * @retval None */ static void MX_TIM3_Init(void) { /* USER CODE BEGIN TIM3_Init 0 */ /* USER CODE END TIM3_Init 0 */ TIM_ClockConfigTypeDef sClockSourceConfig = {0}; TIM_MasterConfigTypeDef sMasterConfig = {0}; /* USER CODE BEGIN TIM3_Init 1 */ /* USER CODE END TIM3_Init 1 */ htim3.Instance = TIM3; htim3.Init.Prescaler = 6400-1; htim3.Init.CounterMode = TIM_COUNTERMODE_UP; htim3.Init.Period = 2500-1; htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE; if (HAL_TIM_Base_Init(&htim3) != HAL_OK) { Error_Handler(); } sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL; if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK) { Error_Handler(); } sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET; sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN TIM3_Init 2 */ /* USER CODE END TIM3_Init 2 */ } /** * @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 */ /* USER CODE BEGIN USART1_Init 1 */ /* USER CODE END USART1_Init 1 */ 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(); } /* USER CODE BEGIN USART1_Init 2 */ /* USER CODE END USART1_Init 2 */ } /** * @brief USART2 Initialization Function * @param None * @retval None */ static void MX_USART2_UART_Init(void) { /* USER CODE BEGIN USART2_Init 0 */ /* USER CODE END USART2_Init 0 */ /* USER CODE BEGIN USART2_Init 1 */ /* USER CODE END USART2_Init 1 */ huart2.Instance = USART2; huart2.Init.BaudRate = 115200; huart2.Init.WordLength = UART_WORDLENGTH_8B; huart2.Init.StopBits = UART_STOPBITS_1; huart2.Init.Parity = UART_PARITY_NONE; huart2.Init.Mode = UART_MODE_TX_RX; huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart2.Init.OverSampling = UART_OVERSAMPLING_16; huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE; huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1; huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT; if (HAL_UART_Init(&huart2) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN USART2_Init 2 */ /* USER CODE END USART2_Init 2 */ } /** * Enable DMA controller clock */ static void MX_DMA_Init(void) { /* DMA controller clock enable */ __HAL_RCC_DMA1_CLK_ENABLE(); /* DMA interrupt init */ /* DMA1_Channel1_IRQn interrupt configuration */ HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 1, 0); HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn); /* DMA1_Channel2_3_IRQn interrupt configuration */ HAL_NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0, 0); HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn); } /** * @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_GPIOF_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOD_CLK_ENABLE(); /*Configure GPIO pin Output Level */ HAL_GPIO_WritePin(RUN_GPIO_Port, RUN_Pin, GPIO_PIN_RESET); /*Configure GPIO pin Output Level */ HAL_GPIO_WritePin(WARN_GPIO_Port, WARN_Pin, GPIO_PIN_RESET); /*Configure GPIO pin : RUN_Pin */ GPIO_InitStruct.Pin = RUN_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(RUN_GPIO_Port, &GPIO_InitStruct); /*Configure GPIO pins : ADDR1_Pin ADDR2_Pin ADDR3_Pin ADDR4_Pin */ GPIO_InitStruct.Pin = ADDR1_Pin|ADDR2_Pin|ADDR3_Pin|ADDR4_Pin; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Pull = GPIO_PULLUP; HAL_GPIO_Init(GPIOD, &GPIO_InitStruct); /*Configure GPIO pins : VERSION1_Pin VERSION2_Pin */ GPIO_InitStruct.Pin = VERSION1_Pin|VERSION2_Pin; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Pull = GPIO_PULLUP; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); /*Configure GPIO pin : WARN_Pin */ GPIO_InitStruct.Pin = WARN_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(WARN_GPIO_Port, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ /* USER CODE BEGIN 4 */ //延时nus //nus为要延时的us数. //nus:0~190887435(最大值即2^32/fac_us@fac_us=22.5) void delay_us(uint32_t nus) { uint32_t ticks; uint32_t told,tnow,tcnt=0; uint32_t reload=SysTick->LOAD; //LOAD的值 ticks=nus*fac_us; //需要的节拍数 told=SysTick->VAL; //刚进入时的计数器值 while(1) { tnow=SysTick->VAL; if(tnow!=told) { if(tnow=ticks)break; //时间超过/等于要延迟的时间,则退出. } }; } //延时nms //nms:要延时的ms数 void delay_ms(uint16_t nms) { uint32_t i; for(i=0;i
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