checksum 如何计算?

只看该作者 · 2013-11-29 14:21

EB 0B 51 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 64 4F 68 77 56 63 6C 35 68 32 63 3D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 5D EE 55 02 20 EC

EB 0B 51 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 64 6D 2B 61 6A 70 42 48 45 61 30 3D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 5D F9 35 02 4F EC

EB 0B 51 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 59 6D 70 76 52 6B 50 69 4B 67 6B 3D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 2D FE 1D C8 EC

以上有三组数据，已知EB是包头，EC是包尾，均为不变数据，倒数第二个数据为checksum，想请问各位大虾，checksum如何计算出来的。小弟在此先感谢了。

如果知道的可以留下QQ号码，歇息。

只看该作者 · 2013-11-29 14:40

感觉很复杂，对吧？

只看该作者 · 2013-11-29 14:41

可能我说明的不够清晰，第一组的 checksum 是倒数第二个数据 20，第二组的 checksum 是倒数第二个数据 4F，第三组的 checksum 是倒数第二个数据 C8

只看该作者 · 2013-11-29 14:49

EB 0B 51 64 4F 68 77 56 63 6C 35 68 32 63 3D 5D EE 55 02 20 EC

EB 0B 51 64 6D 2B 61 6A 70 42 48 45 61 30 3D 5D F9 35 02 4F EC

EB 0B 51 59 6D 70 76 52 6B 50 69 4B 67 6B 3D 1C 2D FE 1D C8 EC

蓝色部分为不会变的数据，也就是包头包尾，为红色部分是 checksum，黑色部分为数据，这样子可能好看一点。