IMXRT105x LCD控制器对于高分辨率支持问题

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IMXRT105x LCD控制器对于高分辨率支持问题

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yourchoochoo
Contributor I

Hi, @kerryzhou 

硬件环境: IMXRT105x、 SDRAM(166M SEMC)、 480*1920 24bit RGB LCD

目前情况:
    LCD显示静态界面,图像能够显示,但是会在代码运行过程中发生水平偏移,若绘制LCD画面后,执行 while(1){delay},则图像发生水平偏移的频率较高,若绘制LCD画面后,直接return,让CPU进入IDLE,则发生水平偏移的频率会低的多。

问题:
    1.  105x 芯片手册上描述说LCD控制器最高分辨率支持为1366*768 WXGA,这里是指总像素点合还是横纵像素点?

    2.  105x 是否能支持这种高分辨率的显示屏?

    3.  LCD显示发生水平偏移,猜测为总线带宽不够导致,但具体具体原因未知,针对这种问题是否有比较好的解决方案?

希望能得到相关指点,十分感谢。

 

 

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fangfang
NXP TechSupport
NXP TechSupport

楼主

您好,你可以参考这个文档,里面有更多的信息可以帮到您。

https://www.nxp.com/docs/en/application-note/AN12302.pdf。

 

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eric_yp_chen
Contributor I

Hi @yourchoochoo 

建議您量測  LCD 端的Hsync信號, 有可能是Rise /Fall Setup Time 太長造成LCD水平位移 

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fangfang
NXP TechSupport
NXP TechSupport

楼主

您好,你可以参考这个文档,里面有更多的信息可以帮到您。

https://www.nxp.com/docs/en/application-note/AN12302.pdf。

 

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- We are following threads for 7 weeks after the last post, later replies are ignored
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yourchoochoo
Contributor I

企业微信截图_1604022645562.png

目前修改   LCDIF_CTRL2_OUTSTANDING_REQS  与 LCDIF_CTRL2_BURST_LEN_8 寄存器已经解决了水平偏移的问题,但是第二点中的 LCDIF_THRES 寄存器,我在用户手册中并未找到相关寄存器,但是看他的描述,是指下列寄存器吗?企业微信截图_1604022811910.png

 

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