The STM32 Timer example program shows how to configure and use the timer TIM1 of STMicroelectronics STM32F103xx microcontroller. TIM1 is configured to generate an update interrupt every 250 ms. The lit LED moves on every timer tick. The configuration of
This is an interrupt handler. The HAL libraries will manage the main interrupt service routine (ISR) when the timer interrupt occurs (feel free to examine it in stm32l4xx_it.c). At some point in that ISR, the code will call HAL_TIM_PeriodElapsedCallback(), which we ...
使能 SysTick 中断 (HAL_SYSTICK_Config 内部通常会使能) // HAL_NVIC_EnableIRQ(SysTick_IRQn); g_soft_timer_tick_flag = 0; // 清除初始标志位 } SoftTimerID_t SoftTimer_Create(SoftTimerMode_t mode, uint32_t period_ms, SoftTimerCallback_t callback) { if (callback == NULL || period_...
For example, this ISR exits immediately after clearing the timer interrupt. Without the external buffer implementation, this code would work as expected. However, on a device with an external, system-level write buffer, this code could cause this "double IRQ" condition: void Timer_IRQHandler (vo...
Given the example above, one way to do this is by incrementing the timeout counter AFTER clearing the interrupt: void Timer_IRQHandler (void) { PortD->PTOR |= 1<<0; /* Toggle output on port D0 */ Timer->MSR |= TIMER_MASK; /* Clear timer interrupt */ ...
For example, if a SysTick interrupt is required after 400 clock pulses, set RELOAD to 400. 在N个处理器时钟周期要产生一次SysTick中断,重载值RELOAD就设置为N。例如需要在400个时钟周期后产生一次SysTick中断,重载值RELOAD就设置为400。 原文:To generate a multi-shot timer with a period of N ...
You'll see blynkTimer Software is blocked while system is connecting to WiFi / Internet / Blynk, as well as by blocking task in loop(), using delay() function as an example. The elapsed time then is very unaccurateWhy using ISR-based Hardware Timer Interrupt is better...
现在我们清楚了,这儿就是中断向量表,每一个item对应一个中断或异常处理,这里item的填写要和stm32spec中的Interrupt and exception vectors一节中的列表中的顺序一致。 说道这里,又有一个问题,这个向量表是放在何处的呢?上面对.intvec的解释可以看出是被链接器放到了一个地址上(这里是0x08000000,NVIC_VectTab_FLASH)...
Abstract: STM32 has powerful timers, including basic timer, comment timer and senior timer. In this chapter, we will introduce the basic application of the timer: How to use timer interrupt to control the LED blinking with interval of 1s. In this chapter, we will use the GPIO project des...
NVIC_SetPendingIRQ(Timer0_IRQn);// 此处假设 Timer0_IRQn 等于 3// Timer0_IRQn 为定义在设备...