修正delay_us被优化的错误
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@ -64,7 +64,7 @@ GETCHAR_PROTOTYPE
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void delay_us(uint16_t us)
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{
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uint32_t delay = (HAL_RCC_GetHCLKFreq() / 4000000 * us);
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volatile uint32_t delay = (HAL_RCC_GetHCLKFreq() / 4000000 * us);
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while (delay--);
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}
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