- E_Bool Ticker_Out(u32 *pTicker, u32 uCompareValue)
- {
- u32 uTicks = 0;
- uTicks = BSP_Get_SysTick();
-
- if(0 == uCompareValue)
- {
- *pTicker = uTicks;
- return True;
- }
- else
- {
- if(uTicks >= (*pTicker))
- {
- uTicks = uTicks - (*pTicker);
- }
- else
- {
- uTicks = (U32_MAX_VALUE - (*pTicker)) + uTicks;
- }
- if (uTicks >= uCompareValue)
- {
- return True;
- }
- }
- return False;
- }
- u32 BSP_Get_SysTick(void)
- {
- return gSystickTimes; /* 获取系统心跳 */
- }
- void SysTick_Handler(void)
- {
- gSystickTimes++; /* 系统心跳计数 */
- }
- int main()
- {
- E_Bool eState = False;
- static u32 uSampleTicker = 0;
-
- while(1)
- {
- eState = Ticker_Out(&uSampleTicker, 500);
- if(True == eState)
- {
- Ticker_Out(&uSampleTicker, 0);
- LED_ON();
- }
- }
- }
| 
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