想给和家亲摄像头刷 OpenIPC，求助 u-boot 相关问题

纯小白，不太了解这方面，让大家见笑了。

摄像头是岭雁科技的 LYC40-PTZ ，经拆机确认 SoC 是君正的 T31N ，CMOS 是 sc2335 ，应该可以支持 OpenIPC ，所以用 ttl 连接后按照网上一些教程照葫芦画瓢准备进 u-boot 刷机。

启动日志如下：

U-Boot SPL 2013.07 (No 23 2020 - 17:19:58) Timer init CLK stop PLL init pll_init:366 pll_cfg.pdiv = 10, pll_cfg.h2div = 5, pll_cfg.h0div = 5, pll_cfg.cdiv = 1, pll_cfg.l2div = 2 nf=118 nr = 1 od0 = 1 od1 = 2 cppcr is 07605100 CPM_CPAPCR 0750510d nf=100 nr = 1 od0 = 1 od1 = 2 cppcr is 06405100 CPM_CPMPCR 0640510d nf=100 nr = 1 od0 = 1 od1 = 2 cppcr is 06405100 CPM_CPVPCR 0640510d cppcr 0x9a7b5510 apll_freq 1404000000 mpll_freq 1200000000 vpll_freq = 1200000000 ddr sel mpll, cpu sel apll ddrfreq 600000000 cclk 1404000000 l2clk 702000000 h0clk 240000000 h2clk 240000000 pclk 120000000 CLK init SDRAM init sdram init start ddr_inno_phy_init ..! phy reg = 0x00000007, CL = 0x00000007 ddr_inno_phy_init ..! 11: 00000004 ddr_inno_phy_init ..! 22: 00000006 ddr_inno_phy_init ..! 33: 00000006 REG_DDR_LMR: 00000210 REG_DDR_LMR: 00000310 REG_DDR_LMR: 00000110 REG_DDR_LMR, MR0: 00f73011 T31_0x5: 00000007 T31_0x15: 0000000c T31_0x4: 00000000 T31_0x14: 00000002 INNO_TRAINING_CTRL 1: 00000000 INNO_TRAINING_CTRL 2: 000000a1 T31_cc: 00000003 INNO_TRAINING_CTRL 3: 000000a0 T31_118: 0000003c T31_158: 0000003c T31_190: 0000001f T31_194: 0000001e jz-04 : 0x00000051 jz-08 : 0x000000a0 jz-28 : 0x00000024 DDR PHY init OK INNO_DQ_WIDTH :00000003 INNO_PLL_FBDIV :00000014 INNO_PLL_PDIV :00000005 INNO_MEM_CFG :00000051 INNO_PLL_CTRL :00000018 INNO_CHANNEL_EN :0000000d INNO_CWL :00000006 INNO_CL :00000007 DDR Controller init DDRC_STATUS 0x80000001 DDRC_CFG 0x0a288a40 DDRC_CTRL 0x0000011c DDRC_LMR 0x00400008 DDRC_DLP 0x00000000 DDRC_TIMING1 0x040e0806 DDRC_TIMING2 0x02170707 DDRC_TIMING3 0x2007051e DDRC_TIMING4 0x1a240031 DDRC_TIMING5 0xff060405 DDRC_TIMING6 0x32170505 DDRC_REFCNT 0x00f2e701 DDRC_MMAP0 0x000020fc DDRC_MMAP1 0x00002400 DDRC_REMAP1 0x03020d0c DDRC_REMAP2 0x07060504 DDRC_REMAP3 0x0b0a0908 DDRC_REMAP4 0x0f0e0100 DDRC_REMAP5 0x13121110 DDRC_AUTOSR_EN 0x00000000 sdram init finished SDRAM init ok board_init_r image entry point: 0x80100000 U-Boot 2013.07 (Nov 23 2020 - 17:19:58) Board: ISVP (Ingenic XBurst T31 SoC) DRAM: 64 MiB Top of RAM usable for U-Boot at: 84000000 Reserving 445k for U-Boot at: 83f90000 Reserving 32832k for malloc() at: 81f80000 Reserving 32 Bytes for Board Info at: 81f7ffe0 Reserving 124 Bytes for Global Data at: 81f7ff64 Reserving 128k for boot params() at: 81f5ff64 Stack Pointer at: 81f5ff48 Now running in RAM - U-Boot at: 83f90000 MMC: msc: 0 the manufacturer 1c SF: Detected EN25QH128A In: serial Out: serial Err: serial Net: ====>phy 0:0x0-0x0 found SPEED:0, DUPLEX:0 Jz4775-9161 upgradeFirmware 20200921120000 20200921120000 upgradeFirmware 20200921120000 20200921120000 upgradeFirmware 013 013 sdupdate - auto upgrade file from mmc to flash Usage: sdupdate LOAD_ID ADDR_START ADDR_END LOAD_ID: 0-->u-boot 1-->kernel 2-->rootfs 3-->demo.bin ex: sdupdate (update all) or sdupdate 0 0x0 0x40000 Enter key to stop autoboot in 3 seconds the manufacturer 1c SF: Detected EN25QH128A --->probe spend 4 ms SF: 2621440 bytes @ 0x50000 Read: OK --->read spend 842 ms ## Booting kernel from Legacy Image at 80600000 ... Image Name: Linux-3.10.14__isvp_swan_1.0__ Image Type: MIPS Linux Kernel Image (lzma compressed) Data Size: 1727656 Bytes = 1.6 MiB Load Address: 80010000 Entry Point: 803c7810 Verifying Checksum ... OK Uncompressing Kernel Image ... OK Starting kernel ... 

现在的问题是，根据提示“Enter key to stop autoboot in 3 seconds”中断启动不成功，不管按什么键都会照常启动内核。ttl 连接确认没问题，是可以正常输入的。在内核启动开始跑 log 后按键会有一个登陆提示 Ingenic-uc1_1 login: 然后继续跑码。

我的疑惑是：

• 看类似的教程，即使有 u-boot 密码，也是在按任意键停止启动后不跑码了才出登陆提示，那我这边出现的登陆提示到底是进入 u-boot 的登陆，还是其他的？
• 为什么无法中断启动，是设置了特殊的按键吗？
• 根据日志内容提示可以用 sdupdate 命令更新 u-boot ，假如我无法找到正确的密码，我可以直接用该命令覆盖一个新的 u-boot 上去吗？

希望各位大佬解惑。