功能：使44B0蜂鸣器周期的相关代码。很不错

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2410在ads1.2环境下的iis音频驱动试验代码，采用DMA的传输方式，大家可以参考一下-2410 in ads1.2 environment iis audio driver test code, the use of DMA transfer mode, we can refer to

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基于qt的温湿度监控系统，并且可以移植到arm9开发板上

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