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    V3s的USB启动问题

    编译和烧写问题专区
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    • J
      jeff123a LV 3 last edited by

      如题,目前使用贴片的TF卡贴到SDC0上,想通过FEL模式去烧录。现在问题是如果TF卡有启动程序,则无论SPI_MISO是否拉地,都直接会在TF卡启动,不进入FEL模式。按照V3S芯片手册,SPI_MISO引脚应该是优先级最高的,想问下是什么问题。

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      • J
        jeff123a LV 3 last edited by

        75e6bb4f-078f-467a-816d-52a825a9a7e2-image.png

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          jeff123a LV 3 @jeff123a last edited by

          @jeff123a 7dc50911-5fb4-409a-b02f-a4ed8af18143-image.png

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          • A
            awwwwa LV 8 last edited by

            默认优先级最高的是SDC0,需要SDC0-CLK接地

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              jeff123a LV 3 @awwwwa last edited by

              @awwwwa 那这个和v3s的芯片手册是不是冲突了。。调试了半天

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                awwwwa LV 8 @jeff123a last edited by

                @jeff123a 手册也写明了先 SDC0再SPI0,没有问题
                e77dfbfa-d546-4d4b-a0ac-39ab9bd34531-image.png

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                  jeff123a LV 3 @awwwwa last edited by

                  @awwwwa 我是想要在上面BSP pin拉低进入USB,但是只要SDC0有程序就不会进入USB模式。SPI我全程没用到,只是MISO脚拉低而已

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                    awwwwa LV 8 @jeff123a last edited by

                    @jeff123a 拉低SDC的SDC0-CLK,才可以进入下载模式

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