Yl236 digital tube adc0809c Language

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//
// At89s52 adc0809 Digital Display
// Author: Yan Jianhua QQ: 10772919
// Jiangsu Nantong Technician College
// 2014.5.28
//
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Sfr P0 = 0x80; // digital segment code, adc0809 data end
Sfr P2 = 0xa0; // control Foot
// Digital control pin definition, wr, cs changed from 0 to 1 valid
Sbit cs1 = P2 ^ 0; // field code
Sbit cs2 = P2 ^ 1; // bit code
Sbit wr = P2 ^ 2; // clock
// Adc0809 control pin Definition
Sbit adc_eoc = P2 ^ 3; // conversion completed = 1, unfinished = 0
Sbit adc_cs = P2 ^ 4; // can be directly grounded = 0
Sbit adc_rd = P2 ^ 5; // oe = ~ (Rd | cs)
Sbit adc_wr = P2 ^ 6; // start = ale = ~ (Wr | cs)
// Variable definition
Unsigned long int v; // voltage value
Unsigned char v2; // Save the adc result
// Latency Function
Void ys (unsigned x)
{
Unsigned char I;
While (x --) for (I = 0; I <120; I ++ );
}
// Adc Conversion Function
Adc ()
{
// Prepare
Adc_eoc = 1; // set the conversion end flag.
Adc_rd = 1; // disable the bus to prevent digital tube interference
Adc_wr = 1; // write prohibited
Adc_cs = 0; // cs simultaneously controls wr and rd and can be directly grounded.
// Start the conversion
Adc_wr = 0; // set the channel number, the ale High-Level Lock channel address, and the start rising edge is reset.
Adc_wr = 1; // start Conversion
While (adc_eoc = 0); // The conversion ends at a high level.
Adc_rd = 0; // oe high level allow output
// Read the result
P0 = 0xff; // P0 serves as the input end
V2 = P0; // read the Conversion Result
Adc_rd = 1; // disable the bus to prevent digital tube interference
}
// 8-bit common Yang digital display function
Xianshi ()
{
Unsigned char code DSY_CODE [] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99,0x92,0x82, 0xf8, 0x80, 0x90, 0xff, 0xbf}; // segment code
Unsigned char I;
V = (unsigned long int) v2 * 5000/255; // The row must be forcibly converted
// Scan from right to left and from the second bit
For (I = 0; I <8; I ++)
{
// Bit Elimination
P0 = 0xff; // close
Cs2 = 0; // bit valid
Wr = 0; wr = 1; // clock
Cs2 = 1; // The bit is invalid.
// Send the field code
P0 = DSY_CODE [v % 10]; // send a field code
Cs1 = 0; // valid segment
Wr = 0; wr = 1; // clock
Cs1 = 1; // The segment is invalid.
// Send location code
P0 = ~ (1 < Cs2 = 0; // bit valid
Wr = 0; wr = 1; // clock
Cs2 = 1; // The bit is invalid.
V/= 10; // scale down v by 10 times for a long time
Ys (1 );
}
}
// Main Function
Main ()
{
While (1)
{
Adc (); // adc Conversion
Xianshi (); // Digital Display
}
}

The following figure shows the simulation principle.