#include <stdint.h> #include "stm32f446.h" void tim2_init(void); int main(void) { //Turn on peripheral clock for GPIO Port A pRCC->AHB1ENR |= (1 << 0); //Set PA5 as the output pin pGPIOA->MODER |= (0b01 << 10); tim2_init(); while(1) { while(...
在使用STM32的HAL库时,经常会用到HAL_Delay()延时函数,该函数的参数是无符号32bit整数,除非被更高优先级打断,否则可实现毫秒级的阻塞式延时。该函数的底层是使用了CM4内核的滴答定时器,非ST厂商设计的定时器。从硬件和程序实现步骤上对该方法追根溯源。 滴答定时器是CM4内核中的一部分,内核的简化模型...
tick timer,SysTick,具有自动重载和溢出中断功能,所有基于Cortex_M3处理器的微控制器都可以由这个定时器获得一定的时间间隔。 systick的作用: 在单任务引用程序中,因为其架构就决定了它执行任务的性,这就引出一个问题:当某个任务出现问题时,就会牵连到后续的... STM32F407 SysTick简介 一.系统定时器 1....
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... 查看原文 STM32F103C8T6利用串口指令和按键控制28BYJ-48...
I tried changing the stm board to check it is hard fault related but still same issue happening. Also i am using CubeIDE and HAL libraries but we tried programming and debugging in standard library and it worked well. So probably problem is about HAL libraries, but i couldn't figure it...
代码的书写过程中经常用到延时,这里主要讲述一下HAl延时,HAL库之HAL_Delay()函数在72M主频,STM32CUBEMX自动生成情况下,默认为延时1ms单位,即HAL_Delay(500)表示500ms延时,这是因为在默认状态下,SysTick()默认设置为1ms中断,下面就原理进行叙述。 2022-04-26 09:09:38 Free...
I have set up ThreadX on my STM32U5A9 board using CubeMX. In such configuration it is recommended to use SysTick for ThreadX and select some other timer as a Timebase Source so I selected TIM7. Now HAL_Delay() and HAL_GetTick() functions are very unreliable. If the...
I was using similar logic for STM32F103C8T6 with mikroelektonika and it is working fine. I dont know if this will help in any way. But here is my experience with STMs Mikroelektrika ProForArm amd Cube IDE on the same micro controller. ...
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Creating a new stm32cubemx project for either of the stm32F4 chips using the stm32cube 1.26.0-1.26.2 drivers causes HAL_Delay to enter infinite loop because the systick timer to not increment and the default systick priority set to 15 instead of 0. Setting systick priority to 0 does ...