Formatting FAT32 has existed for over 20 years and the filesystem layout is well understood. After that, the remainder of the partition is divided up into clusters which contain all file data and metadata. FAT32 supports several power of 2 based cluster sizes, but the only two we should consider are 32kiB and 64kiB. Using 64kiB will yield the best speed performance at the expense of wasted space for small files. To do this, perform a regular format of the partition and record the size of the FAT tables.
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Up to now, default configuration is that initial pin mux is done by bootloader, U-Boot, and can be later overwritten by the Linux kernel. Recent 2. See below for how to modify this file. This is marked by the trailing comment. IEN: This enables input, i. Linux kernel uses some different syntax compared to U-Boot for pin mux, but logic is the same. This string consists of two parts: the pad name e. Configure mux MODE4 here. Done with 3 orred macros in U-Boot. Recent Kernels More recent kernels 2.
Follow these directions to perform configuration in these kernels. NOTE: Although these instructions may be correct, there is a problem with enabling mux-ing in at least some kernels. If your root filesystem will not mount after following these instructions, you can revert to your old kernel and try setting mux values through u-boot.
Skip to the next section for this. This contains a bunch of preprocessor magic which is intended to make your life easier. First locate the appropriate ball definition for the OMAP package being used. This assumes you are using OpenEmbedded and bitbake. In my case I want to use pin Find the BB Description in the beagle. A given pin may appear in more than one place.
Changing the first occurrence may not make the change you want. For example, I wanted to use PWMs.
Formatting SD Cards for Speed and Lifetime