HWBytes

Normally I wanted to Show you yesterday my results of the Filter Implementation, but I found no time so I will Show it today. Cause my Electrodes hadn't good contact you won't see a real ECG but you can see how it filters. Orange is the Original unfiltered Signal. Blue is the Signal filtered with the FPGA. Yellow the Signal filtered with Matlab. Matlab and the FPGA uses the same Coefficients so there's much more Noise from the FPGA. I thought I can reduce the Noise with double Floating Point Precision but that won't met my Timings. That let me come back to Fixed Point Arithmetic. So I made this evening a Fixpoint Version I used 25 Bits Precomma and 39 Bits Pastcomma. So in Sum I'm using 64 Bit Vectors and 128 for Multiplication. When I wrote it I used the STD_LOGIC_ARITH and STD_LOGIC_UNSIGNED librarys. When I simulated it first I hadn't get the right results so I thought about it and I realized that Unsigned is the wrong library I had to use ...

This Weekend I was working on implementing some Filters on the FPGA for my ADS Embedded Project. First I tried it with Fixed Point Arithmetic as I mentioned it in my previous Post. But after reading and trying a bit with it I decided to Switch to Floating Point cause I still have a working Floating Point Adder from a University Project and some thinking about it let's me Implement a working Floating Point Multiplier and the Integer to Floating Point Conversion Units. I don't think that I will release the Units here because I don't know about the licensing. But If you are interested in these Parts send me a mail and I will send you the Code you Need. After I tested them and removing some bugs I started to Implement my Filter. In my University I started to let Matlab create the Filters with the HDL Coder but it doesn't work pretty well and take much resources, because I don't optimized it well in the Settings. But the Simulink Models I created for that we...