问答

NUC972裸机，NAND方式使用u-boot-spl+u-boot+envgo+应用程序可以运行，使用SPI方式不知道怎么弄，麻烦大家帮帮忙指导指导，不胜感激。

使用[font=Helvetica, Microsoft Yahei, verdana][color=#333333][size=13px]NUC972DF61Y,nandfash 是winbond [/size][/color][/font][color=#535353][backcolor=rgb(255, 255, 255)][font=arial, verdana, sans-serif][size=13px]W29N01GVSIAA，[/size][/font][/backcolor][/color][font=Helvetica, Microsoft Yahei, verdana][color=#333333][size=13px]使用官方的linux系统，用芯片内自带的nandflash驱动。批量生产及测试时正常，发客户（无电池，包括rtc电池），1个月后客户焊接RTC电池后，上电57%应用文件丢失或者损坏，丢失数据以page为单位。同时12%无法启动，表现nand-spl 无法启动。[/size][/color][/font][font=Helvetica, Microsoft Yahei, verdana][color=#333333][size=13px]-上电下电测试（硬下电），未出现异常。[/size][/color][/font] [font=Helvetica, Microsoft Yahei, verdana][color=#333333][size=13px]-生成库房（带RTC电池）产品，同一个批次的，未发现异常。[/size][/color][/font] [font=Helvetica, Microsoft Yahei, verdana][color=#333333][size=13px]-生成库房拆除RTC电池，放置14天后，出现5% 应用程序丢失。[/size][/color][/font]

目前手头有两块NUC972的板子，一个开发板，一个自己画的样板。 目前样板无法通过USB连接电脑用NuWriter烧录程序。开发板可以正常烧录。 将样板上的SPI Flash取下，放在开发板上烧录程序之后，再焊接到样板上，程序可以正常运行。也可以通过网口升级裸机程序。 通过SPI Flash启动的时候，读取REG_SYS_PWRON寄存器的值，显示为 0X0201 071F ，开发板该寄存器的值为 0X0200 071F 通过查看文档，发现就是该寄存器的第16位不一样。即USB-ID,引脚的状态，万用表测得该引脚为3.3V，将其拉高或者拉低，依然无法识别。 请高手指点一下排查的方向，感谢

使用工具烧录时出现如下错误：NUC970 IBR 20151008.1735 No Key Boot from USB ======================================= Run firmware code CPU: 300MHz, DDR: 150MHz, SYS: 300MHz, PCLK: 75MHz Parse NuWriter command line ======================================= SM ID [2C][DA][90][95] Using PowerOn setting(0x0): PageSize = 2KB ECC = T12 User Configure: BlockPerFlash= 1,023, PagePerBlock= 64 PageSize= 2,048, ECC= T12, ExtraDataSize= 100, SectorPerBlock= 256 SM ID [2C][DA][90][95] Using PowerOn setting(0x0): PageSize = 2KB ECC = T12 User Configure: BlockPerFlash= 1,023, PagePerBlock= 64 PageSize= 2,048, ECC= T12, ExtraDataSize= 100, SectorPerBlock= 256 g_uIsUserConfig=0 UXmodem_NAND BlockPerFlash=1,023 UXmodem_NAND PagePerBlock=64 UXmodem_NAND PageSize=2,048 SM ID [2C][DA][90][95] Using PowerOn setting(0x0): PageSize = 2KB ECC = T12 User Configure: BlockPerFlash= 1,023, PagePerBlock= 64 PageSize= 2,048, ECC= T12, ExtraDataSize= 100, SectorPerBlock= 256 g_uIsUserConfig=0 UXmodem_NAND BlockPerFlash=1,023 UXmodem_NAND PagePerBlock=64 UXmodem_NAND PageSize=2,048 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,024,address=0x00010000 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,025,address=0x00010800 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,026,address=0x00011000 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,027,address=0x00011800 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,028,address=0x00012000 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,029,address=0x00012800 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,030,address=0x00013000 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,031,address=0x00013800 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,032,address=0x00014000 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,033,address=0x00014800 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,034,address=0x00015000 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,035,address=0x00015800 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! ==> page_no=1,036,address=0x00016000 ERROR: Field 3 encountered uncorrectable BCH error!! ERROR: Field 4 encountered uncorrectable BCH error!! 大佬们求帮助，感谢~~