For example, if the SysTick interrupt is required every 100 clock pulses, setRELOAD to 99.l To deliver a single SysTick interrupt after a delay of N processor clock cycles, use aRELOAD of value N. For example, if a SysTick interrupt is required after 400 clockpulses, set RELOAD to ...
The basic timer generates an output event (TGRO) which can be configured to occur on an update event or when the counter is enabled (for example on a GPIO input). To understand the three counter modes consider Figure 10.2. In these examples, we assume a prescaler of 1 (counter clock is...
The STM32 GPIO example program shows how to configure and use the GPIO ports of STMicroelectronics STM32F103xx microcontroller. Pins PB8..PB15 (LEDs) are configured as output and pins PA0 (S2) and PC13 (S3) are configured as input. By pressing buttons S2
ENABLE );//管脚初始化GPIO_InitStructure.GPIO_Pin =GPIO_Pin_8;//设置为输入GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING;//初始化GPIO_Init( GPIOA, &GPIO_InitStructure );
//HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0); // 其中调用了 __HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin); /* USER CODE BEGIN EXTI0_IRQn 1 */ //if(GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIO_INPUT_EXTI_PORT, GPIO_INPUT_EXTI_P0)) Exti_Interrupt(0); //自己写的中断功能函数 ...
= NULL ) { isConnected = false ; HAL_GPIO_WritePin(GPIOE, GPIO_PIN_1, GPIO_PIN_RESET); } if ( strstr (( char *)input, "L=0" ) != NULL ) { isLightBulbOn = false ; HAL_GPIO_WritePin(Lightbulb_GPIO_Port, Lightbulb_Pin, GPIO_PIN_RESET); writeToDongle(( uint8_t *)DONGLE_...
在基于STM32微控制器的嵌入式系统开发中,GPIO(GeneralPurposeInput/Output)控制是其中最基本、最常见的操作之一。通过使用STM32的HAL库,可以轻松地对GPIO进行配置和控制。本文将演示如何使用STM32HAL库进行GPIO控制,并提供一个简单的LED控制的实例。 2023-12-21 15:22:16 HMC...
至此,STM32的工程搭建和Jlink调试配置都设置好了。为了方便,在工程成中添加了includes.h、types.h、gpio_bits.h等提供基本功能。 8 测试程序——LED流水灯程序 在工程文件目录下新建Drivers与Devices文件夹, 工程中File->New,新建下面的一些文件。 注:作为一种好的习惯,每个.c文件都应该有一个对应的.h文件。
MX_GPIO_Init(); // 初始化GPIO外设 MX_USART2_UART_Init(); // 初始化USART2串口 /* USER ...
GPIO 通用输入输出口(General Purpose Input Output)GPIO是APB2总线连接并由最常用的IO口引脚(PA或PB...