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    jetson nano 2GB无法识别相机 MV-MIPI-IMX264M

    Scheduled Pinned Locked Moved Jetson App Software
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    • H Offline
      hmj @veye_xumm
      last edited by

      @veye_xumm

      如果用作硬触发模式,如何设置,相机的曝光时间?

      veye_xummV 1 Reply Last reply Reply Quote 0
      • H Offline
        hmj @veye_xumm
        last edited by

        @veye_xumm
        v4l2-ctl --set-ctrl trigger_mode=1
        v4l2-ctl --set-ctrl trigger_src=1
        v4l2-ctl -d /dev/video0 --set-fmt-video=width=2432,height=2048,pixelformat=GREY --stream-mmap --stream-count=1 --stream-to=raw.raw

        我用gpio触发, 硬件链接没问题, 量到正常电平,但是并没有获取到图片,还需要哪些设置?

        1 Reply Last reply Reply Quote 0
        • veye_xummV Offline
          veye_xumm @hmj
          last edited by

          @hmj 参考下面这个文章的ISP部分，可以配置自动曝光，手动曝光。如果是外触发模式，建议使用手动曝光模式，然后手动配置曝光时间和增益。
          https://wiki.veye.cc/index.php/Mv_mipi_i2c.sh_user_guide#metime

          Questions will be answered as soon as possible, please be patient.
          如果你使用中文，请直接用中文提问。
          May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

          H 1 Reply Last reply Reply Quote 0
          • H Offline
            hmj @veye_xumm
            last edited by hmj

            @veye_xumm
            关于ROI, 有几个问题请教一下
            1:X,Y,W,H中的W应该多少字节对齐合适? 全画面下文档建议是64x, X的起始位置应为多少字节对其合适?参考代码中是8
            2:ROI重配置是否需要对/dev/video0设备关闭重新打开?
            3:ROI的设置有2部分重叠, I2C那边有设置参数, V4L2也有设置参数.是否要重配置
            如果我需一起哦截取的位置是 [256,256, 512,512] 那么V4L2那边的具体参数该怎么配置,从0,0开始(应为I2C已经配过了), 还是(256,256)开始?

            veye_xummV 1 Reply Last reply Reply Quote 0
            • veye_xummV Offline
              veye_xumm @hmj
              last edited by

              @hmj

              1. [y] [height] 的步长为 4，[width] 的步长为 8。

                实际上在jetson平台上，建议width的步长为64.这样方便jetson主板收到数据之后对齐操作，也方便你应用层处理。

              @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

              2:ROI重配置是否需要对/dev/video0设备关闭重新打开?

              不需要。

              @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

              3:ROI的设置有2部分重叠, I2C那边有设置参数, V4L2也有设置参数.是否要重配置

              不需要重复设置。
              如果你打开/dev/video0之前对camera做一系列配置，可以用脚本对摄像头进行一系列配置。然后打开/dev/video0，v4l2接口会得到新配置的参数。
              另一个方法，也更简单一些。对于v4l2接口支持的参数，就直接用v4l2接口配置。不支持的用脚本配置即可。

              @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

              如果我需一起哦截取的位置是 [256,256, 512,512] 那么V4L2那边的具体参数该怎么配置,从0,0开始(应为I2C已经配过了), 还是(256,256)开始?

              不管用什么配置方法，都正确传递[256,256, 512,512] 参数进去应该就可以的。

              Questions will be answered as soon as possible, please be patient.
              如果你使用中文，请直接用中文提问。
              May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

              H 1 Reply Last reply Reply Quote 0
              • H Offline
                hmj @veye_xumm
                last edited by hmj

                @veye_xumm

                假设jetson上电后得预配置时[0,0,2432,2048],正在正常按节奏取图,
                这时UI 给了一个[128, 16, 1024, 256] 这么一个需求,
                如何配置驱动,才能让用户无感无缝切换图片.
                (配置时候,可以接受暂时停流, 不接受重启上层应用或重启jetson设备)

                veye_xummV 1 Reply Last reply Reply Quote 0
                • veye_xummV Offline
                  veye_xumm @hmj
                  last edited by

                  @hmj 你在你的程序里面，调用stop stream（VIDIOC_STREAMOFF），然后配置roi，然后重新start stream（VIDIOC_STREAMON）。

                  Questions will be answered as soon as possible, please be patient.
                  如果你使用中文，请直接用中文提问。
                  May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                  H 1 Reply Last reply Reply Quote 0
                  • H Offline
                    hmj @veye_xumm
                    last edited by

                    @veye_xumm
                    也就是说,在nano平台, 关于roi这组参数,可以忽略i2c层面配置,只有v4l那边配置就可以了?
                    这么做是真实硬件ROI, 会带来FPS得提升吧?

                    veye_xummV 1 Reply Last reply Reply Quote 0
                    • veye_xummV Offline
                      veye_xumm @hmj
                      last edited by

                      @hmj
                      I2c脚本和v4l2接口，本质上都是通过i2c配置了camera的寄存器。所以只需要v4l做了，就无需使用脚本配置。
                      是的，降低roi中的图像高度，会提升MAXFPS，你可以通过脚本获取当前配置下的max fps，然后配置fps到范围内的值。

                      Questions will be answered as soon as possible, please be patient.
                      如果你使用中文，请直接用中文提问。
                      May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                      H 1 Reply Last reply Reply Quote 0
                      • H Offline
                        hmj @veye_xumm
                        last edited by hmj

                        @veye_xumm
                        我现在又遇到一个问题,如果我把相机曝光设置为10000(2432*2048), 查询GET_FPS,帧率大约为38.84,那么帧周期为27902, 在此基础上用硬触发(周期为28000的脉冲,其中高电平维持10000,站空比为5:7)去拍, 比如发送10个脉冲, 那么只能收到5图,如果把触发周期改成34000以上, 那么10图都能接受到.

                        我现在需要保证相机尽量快速取图,哪边还需要再配置才能获地高速?

                        veye_xummV 1 Reply Last reply Reply Quote 0
                        • veye_xummV Offline
                          veye_xumm @hmj
                          last edited by

                          @hmj 按照https://wiki.veye.cc/index.php/Mv_mipi_camera_manual/zh part2.4.3的描述，你的诉求应该是没有问题的。
                          你先参考这个链接，升级一下固件：https://wiki.veye.cc/index.php/Mvcam_firmware_update_manual
                          然后再做一下测试试试。

                          Questions will be answered as soon as possible, please be patient.
                          如果你使用中文，请直接用中文提问。
                          May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                          H 1 Reply Last reply Reply Quote 0
                          • H Offline
                            hmj @veye_xumm
                            last edited by

                            @veye_xumm

                            ./mv_mipi_i2c.sh -r -f version
                            version is C 01.34 and L 02.00
                            貌似已经是最新固件,与网站上6月5日是同一版, 无需再升级

                            veye_xummV 1 Reply Last reply Reply Quote 0
                            • veye_xummV Offline
                              veye_xumm @hmj
                              last edited by

                              @hmj https://wiki.veye.cc/index.php/Mv_mipi_i2c.sh_user_guide
                              参考这个页面，把trigger相关的参数读出来一下，发给我看看。
                              trgnum
                              trginterval
                              trgdelay
                              trgedge
                              trgfilter_enable
                              trgfilter_time
                              trgexp_delay
                              trgcount

                              Questions will be answered as soon as possible, please be patient.
                              如果你使用中文，请直接用中文提问。
                              May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                              H 1 Reply Last reply Reply Quote 0
                              • H Offline
                                hmj @veye_xumm
                                last edited by

                                @veye_xumm said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

                                trgcount

                                pt@dpt-desktop:./mv_mipi_i2c.sh -r -f version
                                version is C 01.34 and L 02.00
                                dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trgnum
                                r trigger num is 1
                                dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trginterval
                                r trginterval is 0
                                dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgdelay
                                r trgdelay is 0
                                dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgedge
                                r trg edge is 0
                                dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trgfilter_enable
                                r trgfilter enable is 0
                                dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trgfilter_time
                                r trgfilter time is 1 us
                                dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgexp_delay
                                r trigger exposure delay is 0 us
                                dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgcount
                                r trigger count 156, trigger lost 0

                                veye_xummV 1 Reply Last reply Reply Quote 0
                                • veye_xummV Offline
                                  veye_xumm @hmj
                                  last edited by

                                  @hmj 你现在读取一下fps和maxfps，分别是多少？

                                  Questions will be answered as soon as possible, please be patient.
                                  如果你使用中文，请直接用中文提问。
                                  May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                                  H 2 Replies Last reply Reply Quote 0
                                  • H Offline
                                    hmj @veye_xumm
                                    last edited by

                                    @veye_xumm
                                    ./mv_mipi_i2c.sh -r -f maxfps
                                    r maxfps @ current setting is 35.84 fps
                                    ./mv_mipi_i2c.sh -r -f fps
                                    r fps is 30.00 fps

                                    veye_xummV 1 Reply Last reply Reply Quote 0
                                    • veye_xummV Offline
                                      veye_xumm @hmj
                                      last edited by

                                      @hmj
                                      这是问题所在了。
                                      虽然是触发模式，但是实际生效的帧率还是fps这个参数，maxfps永远只是最大能力的一个提示而已。
                                      那么你之前

                                      @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

                                      查询GET_FPS,帧率大约为38.84,那么帧周期为27902,

                                      这个地方的帧周期计算，应该使用fps来算。 这个fps不仅影响着camera真正的运作时序，也影响着最大可设的曝光时间。
                                      建议你：

                                      ./mv_mipi_i2c.sh -w -f fps -p1 40 -b [bus]
./mv_mipi_i2c.sh -r -f fps -b [bus]

                                      这样，就把相机设置到了当前roi下最大帧率。
                                      应该就没问题了。

                                      Questions will be answered as soon as possible, please be patient.
                                      如果你使用中文，请直接用中文提问。
                                      May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                                      H 1 Reply Last reply Reply Quote 0
                                      • H Offline
                                        hmj @veye_xumm
                                        last edited by

                                        @veye_xumm
                                        感谢,问题解决~

                                        veye_xummV 1 Reply Last reply Reply Quote 0
                                        • veye_xummV Offline
                                          veye_xumm @hmj
                                          last edited by

                                          @hmj 不客气

                                          Questions will be answered as soon as possible, please be patient.
                                          如果你使用中文，请直接用中文提问。
                                          May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                                          1 Reply Last reply Reply Quote 0
                                          • H Offline
                                            hmj @veye_xumm
                                            last edited by

                                            @veye_xumm
                                            我们现在基本测试已经通过,现在有个棘手的问题,由于jetson nano的mipi驱动在kernel image中,我目前的做法是直接替换官方的.

                                            我们目前项目中添加了许多其他功能, 因此修改了内核的许多地方.所以为了替换之前的老相机,必须拿到你们kenrel源码和DTS, 再整合进我们目前的内核中,才能无缝完成项目的迁移.

                                            veye_xummV 1 Reply Last reply Reply Quote 0

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