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sd卡按操作格式化fat32模式、将sd_card_files里的MLO复制到SD卡,然后复制LED测试的app到sd卡,插到开发板上,将开发板的拨码开关置为01000,上电,串口打印信息如下,程序没有启动、而且led没有闪烁:
U-Boot 2016.05-g2cdaef6 (Nov 21 2017 - 09:04:05 +0800)
CPU : DRA752-GP ES2.0
Model: TI AM5728 BeagleBoard-X15
Board: AM572x EVM REV A.30
I2C: ready
DRAM: 1 GiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
reading uboot.env
** Unable to read "uboot.env" from mmc1:1 **
Using default environment
SCSI: SATA link 0 timeout.
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: 64bit ncq stag pm led clo only pmp pio slum part ccc apst
scanning bus for devices...
Found 0 device(s).
Net:
Warning: ethernet@48484000 using MAC address from ROM
eth0: ethernet@48484000
Hit any key to stop autoboot: 0
** First descriptor is NOT a primary desc on 0:1 **
switch to partitions #0, OK
mmc0 is current device
** First descriptor is NOT a primary desc on 0:1 **
SD/MMC found on device 0
reading boot.scr
** Unable to read file boot.scr **
reading uEnv.txt
** Unable to read file uEnv.txt **
** First descriptor is NOT a primary desc on 0:1 **
switch to partitions #0, OK
mmc0 is current device
** First descriptor is NOT a primary desc on 0:1 **
SD/MMC found on device 0
** No partition table - mmc 0 **
switch to partitions #0, OK
mmc1(part 0) is current device
SD/MMC found on device 1
** File not found /boot/zImage **
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