EK314的EMMC是否可以覆盖写？

软件01

xml文件是用fdisk类似相关命令分区，然后用mkfs.ext3格式化分区的空间，最后mount -t ext3的相关命令挂载分区，复制文件系统文件到分区里面。你想通网盘烧写128M的文件系统吗，你打包成什么格式？

软件01

yt_p 发表于 2016-10-11 17:06
烧系统这个是没有问题的，我是想问一下在uboot下擦除EMMC应该怎么擦？

mmc read addr blk# cnt
mmc write addr blk# cnt
mmc erase blk# cnt
mmc rescan
mmc part - lists available partition on current mmc device
mmc dev [dev] [part] - show or set current mmc device [partition]
mmc bootpart [dev] [part] - show or set boot partition
mmc list - lists available devices

Program the kernel uImage located in RAM at ${loadaddr} into the microSD. For
example the command to write the image with the size 0x400000 from ${loadaddr}
to the offset of 0x100000 of the microSD card. Refer to the following examples for
the definition of the mmc Parameters.

blk# = (microSD Offset)/(SD block length) = 0x100000/0x200 = 0x800
cnt = (image Size)/(SD block length) = 0x400000/0x200 = 0x2000

详细的需要计算一下

软件01

yt_p 发表于 2016-10-12 12:00
这个我已经知道了，是我表达不好吧。我问的是mmc erase 0x3000 0x1000 这样就会出错，而且擦除很慢。而且才 ...

我们分区都是烧写时分区，很少在u-boot里分区。10M的空间留给uImage ,你可以擦除稍微大点试试