The 3.29 format is a floating point value presented as a signed 32-bit integer.
To convert, take the 32-bit integer and divide it by 2^29.
For example: 0x1234ABCD, 3.29 format equals
n = 0x1234ABCD / (0x20000000) = 0x0.91A55E68 = 0.5689295772463083..