基于51單片機倒車雷達設計（超聲波，TFT屏）

ID:327295 · 發表于 2020-8-16 17:38

根據設計4個超聲波傳感器檢測倒車距離并采用TFT屏幕顯示，不同距離顯示字體顏色改變。

程序如下：

#include<reg51.h>
#include<absacc.h>
#include<intrins.h>
#include<string.h>
#include<font.h>
#include<stdio.h>
sbit TX = P2^1;
sbit RX = P2^0;
unsigned char dspflag;
unsigned char cnt;
unsigned char tflag;
void display(unsigned int d);
void init_t(void);
void Pulse()
{
unsigned char i;
for (i =0 ;i<10; ++i) {
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
// _nop_(); //延時,調整發射頻率
TX = ~TX;
}
}
unsigned int sonic()
{
unsigned int n;
RX=1;
TR1=0;
TH1=TL1=0;
Pulse();
TR1=1;
TF1=0;
for(n=0;n<160;n++); // 排出相鄰干擾
while( RX ==1 && TF1 == 0 ) ;
TR1=0;
if ( TF1 ) {
n=9999;
}else{
n=(TH1<<8)+TL1;
n=(unsigned int) ( n*0.017);//0.018446); // 0.017*12/11.0592
}
return n;
}
//測試硬件平臺：STC12C5A60S2/STC12LE5A60S2
//主頻：12MHZ
//單片機IO推挽輸出設置定義
#define USE_LANDSCAPE//測試程序橫豎屏切換，橫屏請開啟此宏，豎屏請屏蔽
#define MCU_STC12//如果您使用的單片機不是STC12系列(如STC89C52)請屏蔽此宏定義
#ifdef MCU_STC12
sfr P3M1 = 0xB1; //P3M1.n,P3M0.n =00--->Standard, 01--->push-pull
sfr P3M0 = 0xB2; // =10--->pure input, 11--->open drain
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
#endif
//---------------------------液晶屏接線說明-------------------------------------//
//接線前請參考液晶屏說明書第10頁引腳定義
sbit bl =P1^5;//接模塊BL引腳，背光可以采用IO控制或者PWM控制，也可以直接接到高電平常亮
sbit scl =P1^0;//接模塊CLK引腳,接裸屏Pin9_SCL
sbit sda =P1^1;//接模塊DIN/MOSI引腳，接裸屏Pin8_SDA
sbit rs =P1^2;//接模塊D/C引腳，接裸屏Pin7_A0
sbit cs =P1^4;//接模塊CE引腳，接裸屏Pin12_CS
sbit reset =P1^3;//接模塊RST引腳，接裸屏Pin6_RES
//---------------------------End of液晶屏接線---------------------------------//
//定義常用顏色
#define RED 0xf800
#define GREEN 0x07e0
#define BLUE 0x001f
#define WHITE 0xffff
#define BLACK 0x0000
#define YELLOW 0xFFE0
#define GRAY0 0xEF7D
#define GRAY1 0x8410
#define GRAY2 0x4208
void Contrast_Adjust();
code typFNT_GBK16 hz16[];
void Output_Pixel(uint x,uint y);
void delay1us(uint x) // 12.000MHz??
{
while(x--) // x*1 us
{
_nop_();
_nop_();
_nop_();
_nop_();
}
}
void delay_ms(uint time)
{
uint i,j;
for(i=0;i<time;i++)
for(j=0;j<250;j++);
}
//向SPI總線傳輸一個8位數據
void SPI_WriteData(uchar Data)
{
unsigned char i=0;
for(i=8;i>0;i--)
{
if(Data&0x80)
sda=1; //輸出數據
else sda=0;
scl=0;
scl=1;
Data<<=1;
}
}
//向液晶屏寫一個8位指令
void Lcd_WriteIndex(uchar Data)
{
cs=0;
rs=0;
SPI_WriteData(Data);
cs=1;
}
//向液晶屏寫一個8位數據
void Lcd_WriteData(uchar Data)
{
unsigned char i=0;
cs=0;
rs=1;
SPI_WriteData(Data);
cs=1;
}
//向液晶屏寫一個16位數據
void LCD_WriteData_16Bit(unsigned int Data)
{
unsigned char i=0;
cs=0;
rs=1;
SPI_WriteData(Data>>8); //寫入高8位數據
SPI_WriteData(Data); //寫入低8位數據
cs=1;
}
void Reset()
{
reset=0;
delay_ms(100);
reset=1;
delay_ms(100);
}
//////////////////////////////////////////////////////////////////////////////////////////////
//液晶屏初始化 for S6D02A1
void lcd_initial()
{ Reset();//Reset before LCD Init.
//LCD Init For 1.44Inch LCD Panel with ST7735R.
Lcd_WriteIndex(0x11);//Sleep exit
delay_ms (120);
//ST7735R Frame Rate
Lcd_WriteIndex(0xB1);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB2);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB3);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB4); //Column inversion
Lcd_WriteData(0x07);
//ST7735R Power Sequence
Lcd_WriteIndex(0xC0);
Lcd_WriteData(0xA2);
Lcd_WriteData(0x02);
Lcd_WriteData(0x84);
Lcd_WriteIndex(0xC1);
Lcd_WriteData(0xC5);
Lcd_WriteIndex(0xC2);
Lcd_WriteData(0x0A);
Lcd_WriteData(0x00);
Lcd_WriteIndex(0xC3);
Lcd_WriteData(0x8A);
Lcd_WriteData(0x2A);
Lcd_WriteIndex(0xC4);
Lcd_WriteData(0x8A);
Lcd_WriteData(0xEE);
Lcd_WriteIndex(0xC5); //VCOM
Lcd_WriteData(0x0E);
Lcd_WriteIndex(0x36); //MX, MY, RGB mode
Lcd_WriteData(0xC0);
#ifdef USE_LANDSCAPE
Lcd_WriteData(0xA8); //豎屏C8 橫屏08 A8
#else
Lcd_WriteData(0xC8); //豎屏C8 橫屏08 A8
#endif
//ST7735R Gamma Sequence
Lcd_WriteIndex(0xe0);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x1a);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x18);
Lcd_WriteData(0x2f);
Lcd_WriteData(0x28);
Lcd_WriteData(0x20);
Lcd_WriteData(0x22);
Lcd_WriteData(0x1f);
Lcd_WriteData(0x1b);
Lcd_WriteData(0x23);
Lcd_WriteData(0x37);
Lcd_WriteData(0x00);
Lcd_WriteData(0x07);
Lcd_WriteData(0x02);
Lcd_WriteData(0x10);
Lcd_WriteIndex(0xe1);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x1b);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x17);
Lcd_WriteData(0x33);
Lcd_WriteData(0x2c);
Lcd_WriteData(0x29);
Lcd_WriteData(0x2e);
Lcd_WriteData(0x30);
Lcd_WriteData(0x30);
Lcd_WriteData(0x39);
Lcd_WriteData(0x3f);
Lcd_WriteData(0x00);
Lcd_WriteData(0x07);
Lcd_WriteData(0x03);
Lcd_WriteData(0x10);
Lcd_WriteIndex(0x2a);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00+2);
Lcd_WriteData(0x00);
Lcd_WriteData(0x80+2);
Lcd_WriteIndex(0x2b);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00+3);
Lcd_WriteData(0x00);
Lcd_WriteData(0x80+3);
Lcd_WriteIndex(0xF0); //Enable test command
Lcd_WriteData(0x01);
Lcd_WriteIndex(0xF6); //Disable ram power save mode
Lcd_WriteData(0x00);
Lcd_WriteIndex(0x3A); //65k mode
Lcd_WriteData(0x05);
Lcd_WriteIndex(0x29);//Display on
}
/*************************************************
函數名：LCD_Set_Region
功能：設置lcd顯示區域，在此區域寫點數據自動換行
入口參數：xy起點和終點
返回值：無
*************************************************/
void Lcd_SetRegion(unsigned int x_start,unsigned int y_start,unsigned int x_end,unsigned int y_end)
{
#ifdef USE_LANDSCAPE//使用橫屏模式
Lcd_WriteIndex(0x2a);
Lcd_WriteData(0x02);
Lcd_WriteData(x_start+2);
Lcd_WriteData(0x02);
Lcd_WriteData(x_end+2);
Lcd_WriteIndex(0x2b);
Lcd_WriteData(0x01);
Lcd_WriteData(y_start+1);
Lcd_WriteData(0x01);
Lcd_WriteData(y_end+1);
#else//豎屏模式
Lcd_WriteIndex(0x2a);
Lcd_WriteData(0x02);
Lcd_WriteData(x_start+2);
Lcd_WriteData(0x02);
Lcd_WriteData(x_end+2);
Lcd_WriteIndex(0x2b);
Lcd_WriteData(0x01);
Lcd_WriteData(y_start+1);
Lcd_WriteData(0x01);
Lcd_WriteData(y_end+1);
#endif
Lcd_WriteIndex(0x2c);
}
void PutPixel(uint x_start,uint y_start,uint color)
{
Lcd_SetRegion(x_start,y_start,x_start+1,y_start+1);
LCD_WriteData_16Bit(color);
}
void dsp_single_colour(int color)
{
uchar i,j;
Lcd_SetRegion(0,0,128-1,160-1);
for (i=0;i<160;i++)
for (j=0;j<128;j++)
LCD_WriteData_16Bit(color);
}
//采用設置窗口方法填充字庫數據，相比Gui_DrawFont_GBK16更快速
void Fast_DrawFont_GBK16(uint x, uint y, uint fc, uint bc, uchar *s)
{
unsigned char i,j;
unsigned short k;
uint HZnum;
HZnum=sizeof(hz16)/sizeof(typFNT_GBK16);
while(*s)
{
if((*s) >= 128)
{
for (k=0;k<HZnum;k++)
{
if ((hz16[k].Index[0]==*(s))&&(hz16[k].Index[1]==*(s+1)))
{ Lcd_SetRegion(x,y,x+16-1,y+16-1);
for(i=0;i<16*2;i++)
{
for(j=0;j<8;j++)
{
if(hz16[k].Msk[ i]&(0x80>>j)) LCD_WriteData_16Bit(fc);
else
{
if (fc!=bc) LCD_WriteData_16Bit(bc);
}
}
}
}
}
s+=2;x+=16;
}
else
s+=1;
}
}
//此方法描繪漢字較慢
void Gui_DrawFont_GBK16(uint x, uint y, uint fc, uint bc, uchar *s)
{
unsigned char i,j;
unsigned short k,x0;
x0=x;
while(*s)
{
if((*s) >= 128)
{
for (k=0;k<hz16_num;k++)
{
if ((hz16[k].Index[0]==*(s))&&(hz16[k].Index[1]==*(s+1)))
{
for(i=0;i<16;i++)
{
for(j=0;j<8;j++)
{
if(hz16[k].Msk[i*2]&(0x80>>j)) PutPixel(x+j,y+i,fc);
else {
if (fc!=bc) PutPixel(x+j,y+i,bc);
}
}
for(j=0;j<8;j++)
{
if(hz16[k].Msk[i*2+1]&(0x80>>j)) PutPixel(x+j+8,y+i,fc);
else
{
if (fc!=bc) PutPixel(x+j+8,y+i,bc);
}
}
}
}
}
s+=2;x+=16;
}
else
s+=1;
}
}
//顯示一個英文字符
void Display_ASCII8X16(uint x0,uint y0,uint fc,uchar *s)
{
int i,j,k,x,y,xx;
unsigned char qm;
long int ulOffset;
char ywbuf[32],temp[2];
for(i = 0; i<strlen((char*)s);i++)
{
if(((unsigned char)(*(s+i))) >= 161)
{
temp[0] = *(s+i);
temp[1] = '\0';
return;
}
else
{
qm = *(s+i);
ulOffset = (long int)(qm) * 16;
for (j = 0; j < 16; j ++)
{
ywbuf[j]=Zk_ASCII8X16[ulOffset+j];
}
for(y = 0;y < 16;y++)
{
for(x=0;x<8;x++)
{
k=x % 8;
if(ywbuf[y]&(0x80 >> k))
{
xx=x0+x+i*8;
PutPixel(xx,y+y0,fc);
}
}
}
}
}
}
void Font_Test(void)
{//中文顯示測試全動電子歡迎您因為專業所以注
Fast_DrawFont_GBK16(16,10,BLUE,YELLOW, "中文顯示測試");
Fast_DrawFont_GBK16(32,30,RED,WHITE, "中景園");
Fast_DrawFont_GBK16(40,50,BLUE,WHITE, "歡迎您");
Fast_DrawFont_GBK16(32,70,WHITE,BLUE, "因為專注");
Fast_DrawFont_GBK16(32,90,WHITE,BLUE, "所以專業");
// delay_ms(1800);
}
void Font_Test2(void)
{//中文顯示測試全動電子歡迎您因為專業所以注
Fast_DrawFont_GBK16(16,0,BLUE,YELLOW, "基于超聲波的");
Fast_DrawFont_GBK16(32,16,RED,WHITE, "倒車雷達");
Fast_DrawFont_GBK16(24,32,BLUE,WHITE, "設計與制作");
Fast_DrawFont_GBK16(16*3,48,WHITE,BLACK, "程玥");
Fast_DrawFont_GBK16(0,16*5,RED,WHITE, "距離");
Display_ASCII8X16(16*2+1,16*5,RED,":");
Display_ASCII8X16(16*6,16*5,RED,"M");
// Display_ASCII8X16(10,10,BLACK,"Welcome");
// Display_ASCII8X16(10,26,BLACK,"Zhongjy");
// Display_ASCII8X16(10,42,BLACK,"Dots:128*160");
// Display_ASCII8X16(10,58,BLACK,"IC: ST7735");
// Display_ASCII8X16(10,74,BLACK,"VA:6 o'clock");
// Display_ASCII8X16(10,90,BLACK,"I LOVE JIXIE");
// delay_ms(1800);
}
main()
{
uint time = 500;
uchar tt[5] = {0};
unsigned int k;
unsigned int cnt;
init_t();
#ifdef MCU_STC12
P3M1 &= ~(1<<2), P3M0 |= (1<<2); //P3.2 set as push-pull output mode
P1M0 = 0x20;
#endif
bl=0;
lcd_initial();
dsp_single_colour(WHITE);
Font_Test2();
while(1)
{
cnt = sonic();
// EA=1;
for(k=0;k<6000;k++)
sprintf(tt, "%d", cnt);;
if(time % 2)
{
Fast_DrawFont_GBK16(16*3,16*5,WHITE,RED,"空空空");
Display_ASCII8X16(16*4,16*5,BLACK,tt);
//bl = 1;
}
else
{
Fast_DrawFont_GBK16(16*3,16*5,WHITE,YELLOW,"空空空");
Display_ASCII8X16(16*4,16*5,BLACK,tt);
// bl = 0;
}
time++;
if(time > 5000)
{
time = 0;
}
delay_ms(3500);
}
}
void isr_t0(void) interrupt 1
{
tflag++;
if(tflag == 16)
{
tflag = 0;
dspflag ++;
if(dspflag == 3)
dspflag = 0;
}
}
void init_t(void)
{
TMOD = 0x12; // 超聲用定時器1
TH0 = 0x06;
TL0 = 0x06;
ET0 = 1;
EA = 1;
TR0 = 1;
}

復制代碼

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基于51單片機倒車雷達設計（超聲波，TFT屏）

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