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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 = "d312808e29__20250121171817" > 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 = "d312808e34__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e36__20250121171817" > bsp/artinchip/drv/cir/drv_cir.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d312808e39__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e41__20250121171817" > bsp/artinchip/include/drv/drv_cir.h， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d312808e44__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e46__20250121171817" > bsp/artinchip/drv/cir/nec_decoder.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d312808e49__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e51__20250121171817" > bsp/artinchip/drv/cir/rc5_decoder.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d312808e54__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e56__20250121171817" > bsp/artinchip/drv/cir/ir_raw.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d312808e59__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e61__20250121171817" > bsp/artinchip/drv/cir/ir_raw.h， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d312808e64__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e66__20250121171817" > bsp/artinchip/hal/cir/hal_cir.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d312808e69__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e71__20250121171817" > 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 = "d312808e80__20250121171817" > linux 内核中 rc 的基本框架如下图所示：< / p >
< div class = "- topic/p p" data-ofbid = "d312808e83__20250121171817" >
< 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 / >
< / div >
< p class = "- topic/p p" data-ofbid = "d312808e90__20250121171817" > 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 = "d312808e100__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e102__20250121171817" > 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 = "d312808e105__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e107__20250121171817" > 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 = "d312808e110__20250121171817" >
< p class = "- topic/p p" data-ofbid = "d312808e112__20250121171817" > 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 = "d312808e117__20250121171817" > 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 = " footer-container mx-auto " >
< title > footer def< / title >
< style > < ! - -
.p1 {
font-family: FangZhengShuSong, Times, serif;
}
.p2 {
font-family: Arial, Helvetica, sans-serif;
}
.p3 {
font-family: "Lucida Console", "Courier New", monospace;
}
-->< / style >
< div class = "webhelp.fragment.footer" >
< p class = "p1" > Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.< / p >
< / div > < div >
< div class = "generation_time" >
Update Time: 2025-01-21
< / div >
< / div >
< / div >
< / footer >
< div id = "go2top" class = "d-print-none" >
< span class = "oxy-icon oxy-icon-up" > < / span >
< / div >
< div id = "modal_img_large" class = "modal" >
< span class = "close oxy-icon oxy-icon-remove" > < / span >
< div id = "modal_img_container" > < / div >
< div id = "caption" > < / div >
< / div >
< script src = "${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer = "defer" > < / script >
< / body >
2025-01-23 16:37:00 +08:00
< / html >
