How to use SysTick of STM32F103-EEWORLD

Collect

Write it down for later use.

void SysTick_Configuration(void)
{
/* Setup SysTick Timer for 10 msec interrupts */
if (SysTick_Config(SystemCoreClock / 100)) //SysTick configuration function
{
    /* Capture error */
    while (1);
}
/* Configure the SysTick handler priority */
NVIC_SetPriority(SysTick_IRQn, 0x0); //SysTick interrupt priority setting
}
The key lies in the understanding of SysTick_Config(SystemCoreClock / 100)

The function is to open the counter, set the counting period, and enable interrupt. The parameter passed in is the counting period.

The cycle calculation method is: By default, the processor will call SystemInit() during initialization and set the system frequency to 72Mhz, that is, SystemCoreClock=72000000;

It can be simply understood that the system counts 72000000 times per second. If I need a 10ms timing period, I only need to set the reload number to 720000 to meet the requirement.

NVIC_SetPriority(SysTick_IRQn, 0x0); Set the priority to the highest, and adjust it according to your needs

Finally, enter the interrupt processing function

void SysTick_Handler(void)
{

}

Keywords：STM32F103 Reference address：How to use SysTick of STM32F103

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