The important thing to remember about timers is that they are actual hardware devices. So when we create a delay with a timer, it is a hardware delay, as opposed to a software delay, for example, with a for loop and a software delay() function. In this program, we w...
Timer_t *constpxTimer = ( Timer_t * )listGET_OWNER_OF_HEAD_ENTRY( pxCurrentTimerList );/* Remove the timer from the list of active timers. A check has already been performed to ensure the list is not empty. */(void)uxListRemove( &( pxTimer->xTimerListItem ) );traceTIMER_EXPIRED...
For instance a master timer can then be used as a prescaler for a slave timer. To connect the TRGO1 output of Timer 1 to Timer 2, Timer 2 must be configured in slave mode using ITR0 as internal trigger. You select this through the TS bits in theTIM2_SMCR register (writing TS...
#include "stm32f10x.h" #include "led.h" #include "delay.h" #include "key.h" #include "usart.h" #include <string.h> #include "timer.h" #include "oled.h" #include "rtc.h" /* 函数功能: 绘制时钟表盘框架 */ void DrawTimeFrame(void) { u8 i; OLED_Circle(32,32,31);//画外圆...
STM32L4定时器(TIMER)介绍
通过Debug一步步排除,发现是HAL_Delay()函数位置产生了死循环,进一步检查函数内部,最后发现是因为按键使用了中断模式,并且按键中断的抢占优先级(Preemption priority)与系统时钟中断(Time base:System tick timer)的抢占优先级相同,因此在按键中断处理程序中的... ...
(1);delay_us(1);delay_us(1); ,,, ,,, //延迟1000个delay_us(1);的时间 gpio_bit_set(GPIOA,GPIO_PIN_2);//设置PA2为高电平 } 设置示波器单次触发,触发值1V,程序执行后示波器就会捕捉到两引脚的上升波形,上升点相减就是1000个delay_us(1);的时间加上gpio_bit_set(GPIOA,GPIO_PIN_2);的执...
HAL_Delay(1000); /* USER CODEENDWHILE */ /* USER CODEBEGIN3*/ } /* USER CODEEND3*/ } /* REST OF MAIN.C */ In our code, note that we start the timer with HAL_TIM_Base_Start(&htim16). From there, we can use __HAL_TIM_GET_COUNTER(&htim16) to get th...
C语言的time函数应该如何使用 头文件time.h @函数名称: localtime 函数原型: struct tm *localtime(const time_t *timer) 函数功能: 返回一个以tm结构表达的机器时间信息 函数返回: 以tm结构表达的时间,结构tm定义如下: 2020-02-20 15:37:48
2、尝试用HAL_Delay函数失败 发现在外部中断中使用HAL_Delay函数会卡死,只能触发一次中断,然后后面无法触发 原因 查看HAL_Delay函数 /** * @brief This function provides minimum delay (in milliseconds) based * on variable incremented. * @note In the default implementation , SysTick timer is the source...