Problems with a simple floating point adder overlay on PYNQZ-2

[marioruiz]

In this post, there is also a solution

Unable to read back floating-point values when using MMIO read

There are a couple of ways of reading/writing floats. One is convert to/from an integer in your code: f = struct.unpack('f', struct.pack('I', device.read(0x20)))[0] Alternatively you can cast the entire address space to an array of float and access the registers through that: equivalently ar = device.mmio.array.view('f') f = ar[0x8] Note that in this second way you need use indexes in the array rather than addresses. You should also do something similar for writing floating point values - .…

Mario