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Stc8h8k series assembly and C51 actual combat - digital display ADC, key serial port reply key number and ADC value
2022-07-02 05:55:00 【I don't know who】
The nixie tube shows ADC、 Serial port display ADC Keys and values
One 、 subject
Through and channel ADC0 Connected 16 individual ADC Measurement of analog voltage signal changes caused by keys , Use the nixie tube on the experimental box 2 Bit display key code , low 4 Bit display AD value . Use serial port 1 Display the key value and conversion result value on the host serial port assistant , Display format is ： Key value ： Corresponding ADC result . Continue to press enter to switch lines , Display the next key value and its... In the same format ADC result .
Two 、 Code
main function
// high 2 Bit display key code , low 4 Bit display AD value
#include<stc8h.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
bit busy;
u8 key=0;
uchar cnt1ms=0;
uint ad_volume=0;
#define ADC_OFFSET 64
uchar KeyCode=0;
void CalculateAdcKey(uint adc);
uint Get_ADC12bitResult(uchar channel); //channel = 0~7
#define font_PORT P6 // Define font code output port
#define position_PORT P7 // Define bit control code output port
uchar code LED_SEG[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff,0x40,0x79,0x24,0x30,0x19,0x12d,0x02,0x78,0x00,0x10,0xbf };
// Definition "0、1、2、3、4、5、6、7、8、9","A、B、C、D、E、F" as well as " destroy " Font code
// Definition "0、1、2、3、4、5、6、7、8、9"（ Including decimal point ） And “-” Font code
uchar code Scan_bit[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf, 0xbf, 0x7f}; // Define scan bit control code
uchar data Dis_buf[]={
16,16,16,16,16,16,16,0}; // Define the display buffer , The lowest bit shows "0", Others are " destroy "
void gpio() //gpio Initialize to quasi two-way port , At first, except P30,P31 Others are in high resistance state
{
P0M1 = 0x00; P0M0 = 0x00; // Set as quasi two-way port
P1M1 = 0x00; P1M0 = 0x00; // Set as quasi two-way port
P2M1 = 0x00; P2M0 = 0x00; // Set as quasi two-way port
P3M1 = 0x00; P3M0 = 0x00; // Set as quasi two-way port
P4M1 = 0x00; P4M0 = 0x00; // Set as quasi two-way port
P5M1 = 0x00; P5M0 = 0x00; // Set as quasi two-way port
P6M1 = 0x00; P6M0 = 0x00; // Set as quasi two-way port
P7M1 = 0x00; P7M0 = 0x00; // Set as quasi two-way port
}
/*---------------------------- Send byte ----------------------------*/
void SendData(uchar dat)
{
while (busy);
busy = 1;
SBUF = dat; // The data to be sent is stored SBUF
}
/*---------------------------- Send string function ----------------------------*/
void SendString(uchar *s)
{
while (*s !='\0') // The string is read before it stops
{
SendData(*s++); // Every byte sent s++
}
}
void Timer0Init(void) //1 millisecond @24.000MHz
{
AUXR |= 0x80; // Timer clock 1T Pattern
TMOD &= 0xF0; // Set timer mode
TL0 = 0x40; // Set initial value of timing
TH0 = 0xA2; // Set initial value of timing
TF0 = 0; // eliminate TF0 sign
TR0 = 1; // Timer 0 Start timing
}
/*―――――――――― The time delay function ――――――――――――*/
void Delay1ms() //@24.000MHz
{
unsigned char i, j;
_nop_();
i = 32;
j = 40;
do
{
while (--j);
} while (--i);
}
void Delay500us() //@24.000MHz
{
unsigned char i, j;
i = 16;
j = 147;
do
{
while (--j);
} while (--i);
}
/*―――――――――― Show function ――――――――――――*/
void LED_display(void)
{
uchar i;
for(i=0;i<8;i++)
{
position_PORT =0xff; font_PORT =LED_SEG[Dis_buf[i]]; position_PORT = Scan_bit[7-i]; Delay500us();
}
}
/*―――――――――― Serial initialization ――――――――――――*/
void InitUART(void)
{
SCON = 0x50; //8 Bit data
P_SW1= P_SW1 & 0x3F;
AUXR |= 0x40; // Timer 1T Pattern
AUXR &= 0xFE;
TMOD &= 0x0F;
TMOD |= 0x20; //8 Bit auto reload mode
TL1 = 0xDC; //
TH1 = 0xDC;
TR1 = 1; // Turn on timer 1
ES = 1; // Enable serial port interrupt
EA = 1;
}
/**********************************************/
void main(void)
{
uint j;
gpio();
ADCCFG=ADCCFG|0x20; //RESFMT Location 1, Store results right aligned
ADC_CONTR = 0x80; // open AD Convert module power
P1M1=P1M1|0x01; //P1 Set the port to high resistance
Timer0Init();
InitUART();
ET0 = 1; //Timer0 interrupt enable
TR0 = 1; //Tiner0 run
EA = 1; // Open total interrupt
while(1)
{
Dis_buf[4] = ad_volume / 1000%10; // Show ad value
Dis_buf[5] = ad_volume/100%10; // Show ad value
Dis_buf[6] = ad_volume / 10%10; // Show ad value
Dis_buf[7] = ad_volume % 10; // Show ad value
Dis_buf[0] = KeyCode / 10; // Display key code
Dis_buf[1] = KeyCode % 10; // Display key code
LED_display();
if(cnt1ms >= 10) //10ms Read it once ADC
{
cnt1ms = 0;
j = Get_ADC12bitResult(0); //0 passageway , Make a query ADC, The return value is the result , == 4096 For a mistake
if(((256-ADC_OFFSET)<j)&&(j < 4096))
{
LED_display(); // To shake
LED_display();
j = Get_ADC12bitResult(0);
if(((256-ADC_OFFSET)<j)&&(j < 4096))
{
ad_volume=j;
CalculateAdcKey(j); // Calculation key
SendData(KeyCode/10+0x30);
SendData(KeyCode%10+0x30);
SendString(": ");
SendData(ad_volume / 1000%10+0x30);
SendData(ad_volume/100%10+0x30);
SendData(ad_volume / 10%10+0x30);
SendData(ad_volume % 10+0x30);
SendString("\r\n");
Dis_buf[4] = ad_volume / 1000%10; // Show ad value
Dis_buf[5] = ad_volume/100%10; // Show ad value
Dis_buf[6] = ad_volume / 10%10; // Show ad value
Dis_buf[7] = ad_volume % 10; // Show ad value
Dis_buf[0] = KeyCode / 10; // Display key code
Dis_buf[1] = KeyCode % 10; // Display key code
LED_display();
L1: j = Get_ADC12bitResult(0);
while(((256-ADC_OFFSET)<j)&&(j < 4096)) // Key release
{
LED_display();
goto L1;
}
}
}
}
}
}
/**************** measurement AD value *************************/
uint Get_ADC12bitResult(uchar channel) //channel = 0~15
{
ADC_RES = 0; // Clear the conversion result register 0
ADC_RESL = 0;
ADC_CONTR = (ADC_CONTR & 0xe0) | 0x40 | channel; // Power on first , To start , Then select the channel
_nop_(); _nop_(); _nop_(); _nop_();// You need to wait for the circuit to stabilize at the beginning for the first time
while((ADC_CONTR & 0x20) == 0) ; // wait for ADC complete
ADC_CONTR &= ~0x20; // eliminate ADC End mark
return (((uint)ADC_RES << 8) | ADC_RESL );
}
/***************** ADC Keyboard calculation key code ********************************/
void CalculateAdcKey(uint adc)
{
uchar i;
uint j=256;
for(i=1; i<=16; i++)
{
if((adc >= (j - ADC_OFFSET)) && (adc <= (j + ADC_OFFSET))) break; // Judge whether it is within the deviation range
j += 256;
}
if(i < 17) KeyCode = i; // Save key code
}
/********************** Timer0 1ms Interrupt function ************************/
void timer0 (void) interrupt 1
{
cnt1ms++;
}
/*---------------------------- UART interrupt -----------------------------*/
void Uart() interrupt 4 using 1
{
LED_display();
if (RI)
{
RI = 0; // After receiving characters ,RI clear 0
}
if (TI)
{
TI = 0; // After sending characters TI clear 0
busy = 0; // After sending one character busy clear 0
}
}
LED_display function
// The following is a LED_display.c
#include <stc8h.h>
#include <intrins.h>
#define font_PORT P6 // Define font code output port
#define position_PORT P7 // Define bit control code output port
uchar code LED_SEG[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff,0x40,0x79,0x24,0x30,0x19,0x12d,0x02,0x78,0x00,0x10,0xbf };
// Definition "0、1、2、3、4、5、6、7、8、9","A、B、C、D、E、F" as well as " destroy " Font code
// Definition "0、1、2、3、4、5、6、7、8、9"（ Including decimal point ） And “-” Font code
uchar code Scan_bit[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf, 0xbf, 0x7f}; // Define scan bit control code
uchar data Dis_buf[]={
16,16,16,16,16,16,16,0}; // Define the display buffer , The lowest bit shows "0", Others are " destroy "
/*―――――――――― The time delay function ――――――――――――*/
void Delay1ms() //@24.000MHz
{
unsigned char i, j;
_nop_();
i = 32;
j = 40;
do
{
while (--j);
} while (--i);
}
/*―――――――――― Show function ――――――――――――*/
void LED_display(void)
{
uchar i;
for(i=0;i<8;i++)
{
position_PORT =0xff; font_PORT =LED_SEG[Dis_buf[i]]; position_PORT = Scan_bit[7-i]; Delay1ms ();
}
}
LED_display.h The header file
#ifndef __LED_DISPLAY_H__
#define __LED_DISPLAY_H__
void Delay1ms();
void LED_display(void);
uchar code LED_SEG[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff,0x40,0x79,0x24,0x30,0x19,0x12d,0x02,0x78,0x00,0x10,0xbf };
// Definition "0、1、2、3、4、5、6、7、8、9","A、B、C、D、E、F" as well as " destroy " Font code
// Definition "0、1、2、3、4、5、6、7、8、9"（ Including decimal point ） And “-” Font code
uchar code Scan_bit[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf, 0xbf, 0x7f}; // Define scan bit control code
uchar data Dis_buf[]={
16,16,16,16,16,16,16,0}; // Define the display buffer , The lowest bit shows "0", Others are " destroy "
#end if
Thank you very much for watching ！！！
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