问答21ic问答首页 - TAG - 单片机程序
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航顺单片机程序总是死
程序死在了自带库的微秒延时 void BSP_SYSTEM_Delay_us(uint32_t usCnt) { /* SysTick default clock source: HCLK/8 = 32MHz/8 = 4MHz */ SysTick->LOAD = 4 * usCnt; /* Clear SysTick current counter value */ SysTick->VAL = 0; /* Enable SysTick counter */ SysTick->CTRL = SysTick_CTRL_ENABLE_Msk; /* Wait for SysTick counter to 0 */ while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk))//死在这一部 { } /* Disable SysTick counter */ SysTick->CTRL = ~SysTick_CTRL_ENABLE_Msk; /* Clear SysTick current counter value */ SysTick->VAL = 0; }
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