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< / div > < div class = "- topic/body concept/conbody body conbody" > < section class = "- topic/section section" id = "cir_design_intro__section_cjj_4mn_4dc" data-ofbid = "cir_design_intro__section_cjj_4mn_4dc" > < h2 class = "- topic/title title sectiontitle" > 源码说明< / h2 >
< div class = "- topic/p p" data-ofbid = "d112176e27__20250121171554" > CIR 模块的源码位于< span class = "+ topic/ph sw-d/filepath ph filepath" > bsp/artinchip/< / span > < ul class = "- topic/ul ul" id = "cir_design_intro__ul_uth_b5k_g1c" data-ofbid = "cir_design_intro__ul_uth_b5k_g1c" > < li class = "- topic/li li" data-ofbid = "d112176e32__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e34__20250121171554" > bsp/artinchip/drv/cir/drv_cir.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e37__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e39__20250121171554" > bsp/artinchip/include/drv/drv_cir.h， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e42__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e44__20250121171554" > bsp/artinchip/drv/cir/nec_decoder.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e47__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e49__20250121171554" > bsp/artinchip/drv/cir/rc5_decoder.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e52__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e54__20250121171554" > bsp/artinchip/drv/cir/ir_raw.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e57__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e59__20250121171554" > bsp/artinchip/drv/cir/ir_raw.h， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e62__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e64__20250121171554" > bsp/artinchip/hal/cir/hal_cir.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e67__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e69__20250121171554" > bsp/artinchip/include/hal/hal_cir.h， < / p >
< / li > < / ul > < / div >
< / section > < section class = "- topic/section section" id = "cir_design_intro__section_t52_pmn_4dc" data-ofbid = "cir_design_intro__section_t52_pmn_4dc" > < h2 class = "- topic/title title sectiontitle" > 模块架构< / h2 >
< p class = "- topic/p p" data-ofbid = "d112176e78__20250121171554" > linux 内核中 rc 的基本框架如下图所示：< / p >
< div class = "- topic/p p" data-ofbid = "d112176e81__20250121171554" >
< br / > < div class = "imagecenter" > < img class = "- topic/image image imagecenter" id = "cir_design_intro__image_d4h_d5k_g1c" src = "../../../images/cir/rc_arch_lite.png" width = "384" alt = "rc_arch" / > < / div > < br / >
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< p class = "- topic/p p" data-ofbid = "d112176e88__20250121171554" > 红外信号的编码和解码工作由< span class = "- topic/ph ph" > CIR
协议< / span > 负责完成。在完成编码后， （ ） ，
在发送端就是需要将这一系列的 pulse/space 写入发送 FIFO， ， < span class = "- topic/ph ph" > CIR 协议< / span > 进行解码，最终将解码得到的
scancode到输入子系统， ，
驱动的主要任务有：< / p >
< ol class = "- topic/ol ol" id = "cir_design_intro__ol_ugz_2fn_d1c" data-ofbid = "cir_design_intro__ol_ugz_2fn_d1c" > < li class = "- topic/li li" data-ofbid = "d112176e98__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e100__20250121171554" > 将编码得到的高低电平信号以游码的形式写入 TX-FIFO， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e103__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e105__20250121171554" > 将 CIR 模块接收的 RX-FIFO 中的游码正确表示为高低电平的形式，相邻的高电平或低电平需要进行合并。< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d112176e108__20250121171554" >
< p class = "- topic/p p" data-ofbid = "d112176e110__20250121171554" > 根据用户空间传递的红外参数，对 CIR 的底层寄存器进行配置，如配置载波频率，配置占空比等< / p >
< / li > < / ol >
< p class = "- topic/p p" data-ofbid = "d112176e115__20250121171554" > 由于红外信号的数据量都很少，所以在红外信号的发送端，一般是利用循环将所有的数据一次性全部发送出去，而不会采用中断或 DMA
的方式。在红外信号的接收端， ， ，
模块可以支持任何的红外协议，对不同红外协议的支持可以通过对载波配置寄存器的设置来实现。< span class = "- topic/ph ph" > Luban-Lite
中目前提供了 NEC 和 RC5 协议的编解码，< / span > CIR 驱动中默认配置的是支持 NEC 协议。< / p >
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< div class = " wh_topic_toc " > < div class = "wh_topic_label" > 在本页上< / div > < ul > < li class = "section-item" > < div class = "section-title" > < a href = "#cir_design_intro__section_cjj_4mn_4dc" data-tocid = "cir_design_intro__section_cjj_4mn_4dc" > 源码说明< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#cir_design_intro__section_t52_pmn_4dc" data-tocid = "cir_design_intro__section_t52_pmn_4dc" > 模块架构< / a > < / div > < / li > < / ul > < / div >
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