8-bit checksum is off by one
8-bit checksum is off by one Need help figuring out an 8-bit checksum. The data is 132byte vectors. I thought I had the checksum figured out as I am able to transfer ~30kb of data before I hit the last segment of data shown blow which the checksum fails on. Its off by one. d1 = [0x00, 0x00, 0xff, 0x00, 0x00, 0x44, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0xff, 0x00, 0x10, 0x11, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0xff, 0x00, 0x10, 0x12, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0xff, 0x00, 0x10, 0x13, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0x70, 0x00, 0xff, 0x00, 0x10, 0x14, 0xff, 0x00, 0x10, 0x18, 0xff, 0x00, 0x10, 0x1c, 0xff, 0x00, 0x10, 0x20, 0xff, 0x00, 0x10, 0x24, 0xff, 0x00, 0x10, 0x28, 0xff, 0x00, 0x10, 0x2c, 0xff, 0x00, 0x10, 0x30, 0xff, 0x00, 0x10, 0x34, 0xff, 0x00, 0x10, 0x38, 0xff, 0x00, 0x10, 0x3c, 0xff, 0x00, 0x10, 0x40, 0xff, 0x00, 0x10, 0x44, 0xff, 0x00, ...