Intro

This tutorial shows a way of designing a Heart Diseases Detector using Nexys Video board.

This project combines electronics and medicine in order to obtain a product that detects hearth diseases.

The results of this project don't compare with an examination and therefore the resuls cannot be considered valid - this is a project made for a contest and not for medical purposes.

The aim of the project is to compare signals from MIT-BIT database with the signals acquired from the patients and returns a response to the tested person.

Step 1: Dowload the Patterns

The patterns are Matlab files which include 3 types of files: .atr, .dat, .hea. After you've downloaded the files, you need to add their name in the code. The code will be atached down here :-) .On the first part, you need to add the path and the files for every signal. Remember that MIT-BIH data base has sampling frequency = 360 Hz, so you need to obtain this frequency from FPGA. On the specific data, you also have a variable called SAMPLES2READ which shows the number of periods to be displayed.

The files for database must be downloaded from here: MIT-BIT data base.

Step 2: Blocks(ADC and RAM)

The TOP module consist of 4 important blocks:

It is necessary to reduce the standard frequency of 100 MHz to 360 Hz, due to the sampling frequency of the MIT-BIH database; that's why the ADC block has multiple components: PLL, XADC, Frequency Divider.

The RAM :

2048 memory locations
one memory location = 12b

Because the control for writing and reading from the memory needs to be easily done, this block is controlled from an input port : we (write enable).

When the memory is full, a pulse is generated on the pin pulseMem to inform the transmission block to start the transfer to the PC.

Step 3: Transmission

The transmission block waits for the memory to be full and after that it sends information to the PC. Because our signal has 12b - we chose to transmit 2 packages of 8 bits: