设计说明
CIR 模块的源码位于bsp/artinchip/
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bsp/artinchip/drv/cir/drv_cir.c，cir driver 层接口实现
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bsp/artinchip/include/drv/drv_cir.h，cir driver 层接口头文件
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bsp/artinchip/drv/cir/nec_decoder.c，NEC 协议编解码实现
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bsp/artinchip/drv/cir/rc5_decoder.c，RC5 协议编解码实现
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bsp/artinchip/drv/cir/ir_raw.c，编解码调用及注册接口实现
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bsp/artinchip/drv/cir/ir_raw.h，编解码调用及注册接口头文件
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bsp/artinchip/hal/cir/hal_cir.c，cir hal 层接口实现
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bsp/artinchip/include/hal/hal_cir.h，cir hal 层接口头文件及寄存器定义