pinMode(LED_BLUE, OUTPUT); pinMode(LED_RED, OUTPUT);//Interval in microsecsif(ITimer.attachInterruptInterval(HW_TIMER_INTERVAL_MS*1000, TimerHandler))//过小的HW_TIMER_INTERVAL_MS会导致loop无法运行,这里测试过不需要调节{ Serial.print(F("Starting ITimer OK, millis() =")); Serial.println(mi...
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
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 ...
ESP_LOGI(TAG, "Example configured to blink GPIO LED!"); /* 复位GPIO的状态 */ gpio_reset_pin(26); gpio_reset_pin(27); /* 设置GPIO为输出模式 */ gpio_set_direction(26,GPIO_MODE_OUTPUT); gpio_set_direction(27,GPIO_MODE_OUTPUT); while(1) { ESP_LOGI(TAG, "Turning the LED %s!",...
Output compare preload 输出比较预加载,作用和auto-reload preload 类似; CH Polarity 通道起始电平。 打开定时器中断,如果没要求优先级默认即可。 四、生成代码 1、关于生成的定时器配置的代码如下所示: staticvoidMX_TIM2_Init(void) {/*USER CODE BEGIN TIM2_Init 0*//*USER CODE END TIM2_Init 0*/TIM...
搜索PH7引脚,设置为Output模式: 然后再右键,设置Pin Reserved,选择Cortex-M4 FW。 点击左边的System Core,再点到GPIO,可以进行GPIO配置,如上下拉、速率等: 然后,时钟可以不用再配置,项目管理这里,注意勾选如下两项: Copy only the necessary library files,工程会从 STM32Cube MCU 软件包中拷贝需要用到的 HAL ...
在右边图中找到 PD6 引脚,选择GPIO_Output。 在GPIO output level中选择Low输出低电平。 3.3 配置时钟 选择Clock Configuration,USB 时钟配置为48MHz,且来源最好是外部晶振分频得到。 3.4 USB Device USB有主机(Host)和设备(Device)之分。一般电脑的USB接口为主机接口,而键盘、鼠标、U盘等则为设备。
打开左边的System CoreGPIO进入GPIO模式配置界面,在下方会列出该GPIO的配置项。下面我们依次来解释这些配置项的含义: 名称说明 GPIO mode 设置引脚输出模式,可选Output Push Pull(推挽)模式或者Output Open Drain(开漏)模式 GPIO Pull-up/Pull-down 设置 引脚是上拉/下拉/没有上下拉 Mzximum ouput speed 设置引脚...
GPIO An LED is toggled on the NUCLEO-L476 board to indicate sampling and other activity. The activity LED is controlled by Port A, Pin 5, and needs to enabled as digital output to support this function. Build Settings The printf(…) function is used to print numbersformatted as floating ...