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I am using Matlab to read data from a serial port coming through a microprocessor. The data is in hexadecimal format with each sample of 4 bytes(32 bits). When I read this data, I get some random sequence of numbers which don't match the transmitted data. Below is my code

This MATLAB code example was automatically generated with a device configuration tool provided by the toolbox. Type 'tmtool' to start this tool. This is a basic code example to show you how to get started using MATLAB to communicate with a serial device.

Please tell me what I am doing wrong do that I can get the correct heart sound.thanks

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2 Answers

You can lower the baudrate to something more standard, like 115200.

You can also try with a terminal program.

HebeleHododo

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HebeleHododo

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The Serial Port Session

This example describes the steps you use to perform any serialport task from beginning to end.

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The serial port session comprises allthe steps you are likely to take when communicating with a deviceconnected to a serial port. These steps are:

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1. Find your serial ports — Display a list ofserial ports on your system using the seriallist function.

2. Create a serial port object — Createa serial port object for a specific serial port using the serial creation function.

   Configure properties during object creation if necessary. Inparticular, you might want to configure properties associated withserial port communications such as the baud rate, the number of databits, and so on.

3. Connect to the device — Connectthe serial port object to the device using the fopen function.

   After the object is connected, alter the necessary device settingsby configuring property values, read data, and write data.

4. Configure properties — To establishthe desired serial port object behavior, assign values to propertiesusing the set function or dotnotation.

   In practice, you can configure many of the properties at anytime including during, or just after, object creation. Conversely,depending on your device settings and the requirements of your serialport application, you might be able to accept the default propertyvalues and skip this step.

5. Write and read data — Write datato the device using the fprintf or fwrite function, and read data from thedevice using the fgetl, fgets, fread, fscanf, or readasync function.

   The serial port object behaves according to the previously configuredor default property values.

6. Disconnect and clean up — Whenyou no longer need the serial port object, disconnect it from thedevice using the fclose function,remove it from memory using the delete function, and remove it from the MATLAB^® workspaceusing the clear command.

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The serial port session is reinforced in many of the serialport documentation examples. To see a basic example that uses thesteps shown above, see Example: Getting Started.