01-08-2012, 03:16 PM
Embedded system debugging
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EMBEDDED SYSTEM
Embedded system debugging involves more conceptual layers of a target system than debugging for time-sharing systems. Consider the case of debugging a C program within a time-sharing system. User-debugger interaction occurs almost entirely at a C language level of abstraction. Descent into assembly language and machine code representations of a target program is rare. Suspicions about a compiler bug may require inspection of generated assembly code.
PROJECT OVERVIEW
• Chapter 1 contains the block diagram and description of its various blocks and also gives an introduction to the project.
• Chapter 2 deals with the general description of the Power Supply
• Chapter 3 describes the Microcontroller 16F877A details.
• Chapter 4 describes the Measurement of Parameters.
• Chapter 5 describes the Interfacing of RS-232 with 16F877A.
• Chapter 6 describes the LCD Display Unit.
• Chapter 7 describes with the working of Zigbee Transceivers.
RECEIVER SECTION
BLOCK DIAGRAM DESCRIPTION
The transmitter section consists of four parts such as ECG, Temperature, Respiration and Heartbeat sections.ECG signal is taken from human body using electrodes and the amplitude of that signal is too low so amplifier is used to amplify the signal.Temperature can be measured with the help of thermistor and it is also amplified .The amplified ECG signal and Temperature is given to Analog to Digital Converter(ADC).Respiratory level and Heart beat level can be measured. The four section output is given to PIC microcontroller.The output of this circuit can be viewed in Liquid Crystal Display(LCD).The informations can be transferred to anywhere using Zigbee.On the same time driver circuit is used to giving updates to patient.
The receiver section consists of three sections such as Zigbee receiver,RS-232 interface, LABVIEW section.Zigbee receiver receive the signal whatever from the transmitter is given to RS-232 .Using RS-232 it can be easily interfaced with our PC.The output of the whole section can be viewed in LABVIEW.
POWER SUPPLY
BLOCK DIAGRAM
A block diagram containing the parts of a typical power supply and the voltage at various points in the unit is shown in fig. The ac voltage, typically 120 V RMS, is connected to a transformer, which steps that ac voltage down to the level for the desired dc output. A diode rectifier then provides a full-wave rectified voltage that is initially filtered by a simple capacitor filter to produce a dc voltage. This resulting dc voltage usually has some ripple or ac voltage variation. A regulator circuit can use this dc input to provide a dc voltage that not only has much less ripple voltage but also remains the same dc value even if the input dc voltage varies somewhat, or the load connected to the output dc voltage changes. This voltage regulation is usually obtained using one of a number of popular voltage regulator IC units.