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    march1993LV 3

    @march1993

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    march1993 发布的最新帖子

    • 回复: V3s nor flash 烧录之后必须断电才能引导?

      @awwwwa 有具体的源码可以看一下吗?
      我手上有一份 Allwinner V3s SPI NOR Flash Support List_20150509 V1.0.pdf 这里面所有的 nor flash 都是小于等于128Mbit 的,是不是说 V3s 的 BROM 代码里没有复位 spi nor flash 寄存器的过程?

      如果 brom 已经无法动了,有没有办法绕过这个问题呢?比如 V3s 是否有哪些固定的引脚在复位(reset复位或者watchdog复位)过程中会被拉低呢?也许把这个脚接到 nor flash 的 #RESET 脚?

      发布在 编译和烧写问题专区
      M
      march1993
    • 回复: V3s nor flash 烧录之后必须断电才能引导?

      @awwwwa 在 V3s nor flash 烧录之后必须断电才能引导? 中说:

      rtc的fel标识位置

      并没有。

      根据手册打印了RTC所有的寄存器。

      $ sunxi-fel hex 0x01c20400 288
      01c20400: 00 40 00 00 04 00 00 00 14 00 00 00 00 00 00 00  .@..............
      01c20410: 01 01 00 00 25 12 00 00 00 00 00 00 00 00 00 00  ....%...........
      01c20420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c204a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c204b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c204c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c204d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c204e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c204f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      01c20510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      

      会不会是我贴的 W25Q256 不支持呢?这个NOR是32MiB的,会被uboot设置进入4字节模式?

      发布在 编译和烧写问题专区
      M
      march1993
    • 回复: V3s nor flash 烧录之后必须断电才能引导?

      即便断电再上电进入 u-boot 之后,拉低 RESET 还是不能正常重启,会进入 fel,是布线的问题吗?还是说需要让 Winbond Flash 正确 reset?

      发布在 编译和烧写问题专区
      M
      march1993
    • V3s nor flash 烧录之后必须断电才能引导?

      将 u-boot-sunxi-with-spl.bin 通过 sunxi-fel spiflash-write 0 u-boot-sunxi-with-spl.bin 命令烧录到 nor flash 的头部之后,短接 #RESET 和地之后仍然会进入 fel 模式,必须彻底断电再上电才能进入 u-boot 引导。是哪里出了问题呢?
      SPI 四线已经通过 10K 电阻拉高了

      发布在 编译和烧写问题专区
      M
      march1993