单板不能启动,加载不了内核,串口不停打印以下信息:
U-Boot 1.1.6 (Dec 9 2008 - 16:22:10)
DRAM: 64 MB
NAND: NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,
3V 8-bit)
256 MiB
In: serial
Out: serial
Err: serial
PHY not reset!!
Hit any key to stop autoboot: 3
U-Boot 1.1.6 (Dec 9 2008 - 16:22:10)
DRAM: 64 MB
NAND: NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,
3V 8-bit)
256 MiB
In: serial
Out: serial
Err: serial
PHY not reset!!
Hit any key to stop autoboot: 3
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用SAM-BAV2.9对SDRAM空间进行测试,结果都是没问题,不知道问题出在哪?SDRAM为32MB,16BIT接口,从NAND FLASH启动。CPU不停输出复位信号,启动过程中在即使敲了键盘也不能停止它复位。 |