Serial ADC0831 Interfaced With 8051

ADC0831 is an 8 pin IC with 8-bit serial data output receive the output from ADC high to low pulse is given at CS (chip select) pin of ADC form controller. ADC requires delay of two clock pulses before starting data conversion. At the second clock cycle, ADC sends a ‘0’ bit to the controller which indicates that the upcoming bits are the data bits.

ADC needs eight clock pulses to send 8-bit digital output. This digital data is received bit by bit and stored in a variable.  The data is converted to its corresponding ASCII value and sent to LCD for display. The connections of LCD with microcontroller are shown in circuit diagram. The analog signals are generated by at a variable resistance (preset) which is connected to input pin of ADC0831.  

Algorithm

1.      Initialize LCD.

2.      Send a high to low pulse to CS pin to initialize conversion.

3.      Send two clock pulses.

4.      Receive the data bits by one by one and store it in a variable.

5.      Display its corresponding decimal value on LCD.

This code is  written in Embedded C and compiled  in keil uvision 3 and simulated in proteus simulation software.

Here you can get Code, circuit, and simulation:

For Embedded C  Code click here

For Protues Simulation Click Here

For Hex Code Click Here

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