ozone_cp/APP/systick.c

#include "systick.h"
extern uint32_t g_sys_sick;

/*********************************************************
函数名: void User_SysTickInit(void)
描  述: 系统滴答初始化：100us
输入值: 无
输出值: 无
返回值: 无
如果配置1ms(重装载值48000)
**********************************************************/
void User_SysTickInit(void)
{
    SYSTICK_InitStruType x;

    // x.SysTick_Value = SystemCoreClock / 10000;//重装载值4800(SystemCoreClock=48M)
    // x.SysTick_ClkSource = SysTick_ClkS_Cpu;//时钟48M
    // x.SysTick_ITEnable = Enable;
    // SysTick_Init(&x);//现在滴答定时器时钟用的48M，重装载值4800 t=1s/f(f=48M/4800)
    x.SysTick_Value = SystemCoreClock / 1000;
    x.SysTick_ClkSource = SysTick_ClkS_Cpu;//时钟48M
    x.SysTick_ITEnable = Enable;
    SysTick_Init(&x);//现在滴答定时器时钟用的48M，重装载值4800 t=1s/f(f=48M/48000)

    SysTick_Disable();
}

//采用滴答定时器的时钟源，滴答定时器配置的是100us
// extern uint32_t g_sys_sick;
/**
 * @brief ticket辅助方法
 */
uint32_t get_sys_ticket(void) { return g_sys_sick; }

uint32_t port_haspassedms(uint32_t ticket) {
  uint32_t nowticket = get_sys_ticket();
  if (nowticket >= ticket) {
    return nowticket - ticket;
  }
  return UINT32_MAX - ticket + nowticket;
}


void port_do_debug_light_state(void) {
  static uint32_t lastprocess = 0;
  static uint8_t debug_led_state = 1;
  if (port_haspassedms(lastprocess) > 1000) {
    lastprocess = get_sys_ticket();
    debug_led_state = !debug_led_state;
    port_debug_set(debug_led_state);
  }
}


void Delayms(__IO uint32_t nTime)
{
    uint32_t TimingDelay = 0;
    TimingDelay = get_sys_ticket();
    // printf("nTime%d\r\n",nTime);
    while (port_haspassedms(TimingDelay) <= nTime);
}