基于TFT彩屏的數字示波器單片機部分代碼（TFT的單片機驅動）

ID:140725 · 發表于 2017-3-10 02:25

給大家發次程序的目的是在于，便于大家學習用51大家來驅動TFT2.4彩屏

流程是由觸發電路檢測周期，fpga數周期和采樣，數據發給單片機。單片機通過周期和數據確定橫縱坐標，在tft上顯示。

下載：

基于tft彩屏的數字示波器單片機編程部分.rar (9.48 KB, 下載次數: 50)

單片機源程序：

#include"head.h"
#include"intrins.h"
sbit key1=P3^2; //水平掃描檔
sbit key2=P3^3;
sbit key3=P3^4;
sbit key4=P3^5; //豎直檔
sbit key5=P3^6;
sbit key6=P3^7; //延遲
uchar sdiv=1;//默認豎直檔
float hdiv=0.000002;//默認水平掃描檔
char xdata y[128]; //存放fpga給的每周期128個點
uint i=0;
float T;//周期
float fu=0;//幅值
sbit clk=P2^0;//單片機給fpga的時鐘
sbit start=P2^2;//單片機給fpga的標志位
uchar time[3];//存放的fpga給的周期信息
long int t_long;//由周期信息移位得到的周期數（只是個數，需要轉化）
long int freq;//頻率
void receive()//單片機與fpga通訊部分，每次fpga發給單片機131個點，前3個點是和周期有關的信息，后128個點是每周期波形的數據點
{
uchar time[3];
uchar i;
start=1;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
for(i=0;i<3;i++)
{
clk=1;
delayms(10);
_nop_();
_nop_();
clk=0; //clk下降沿fpga發數據
_nop_();
_nop_();
clk=1;
time[i]=P1; //高電平單片機收數據
}
t_long=((long int)time[2]*256*256+(int)time[1]*256+time[0])*2;//移位得到周期的數數
for(i=0;i<128;i++)
{
clk=1;
_nop_();
_nop_();
clk=0;
_nop_();
_nop_();
clk=1;
if((uchar)P1<128) //對AD而言128相當于0，所以相當于判斷正負
y[i]=(uchar)P1+128;
else
y[i]=(uchar)P1-128;
if(y[i]>fu)
fu=y[i]; //接受最大值
}
_nop_();
_nop_();
start=0;
clk=1;
_nop_();
_nop_();
clk=0;
_nop_();
_nop_();
clk=1;
}
void keyscan()//檢測按鍵改變div
{
if(key1==0)
{
delayms(10);
if(key1==0)
{
hdiv=0.0000001;
ClearScreen(0xffff);
table();
}
while(!key1);
}
if(key2==0)
{
delayms(10);
if(key2==0)
{
hdiv=0.000002;
ClearScreen(0xffff);
table();
}
while(!key2);
}
if(key3==0)
{
delayms(10);
if(key3==0)
{
hdiv=0.02;
ClearScreen(0xffff);
table();
}
while(!key3);
}
if(key4==0)
{
delayms(10);
if(key4==0)
{
sdiv=1;
ClearScreen(0xffff);
table();
}
while(!key4);
}
if(key5==0)
{
delayms(10);
if(key5==0)
{
sdiv=5;
ClearScreen(0xffff);
table();
}
while(!key5);
}
}
void main(void)
{
clk=1;
start=0;
ILI9325_Initial();//tft初始化
while(1)//循環，每次都是先收到數據，然后顯示
{
ClearScreen(0xffff);//清屏
table();//坐標
fu=0;
receive();
fu=fu*5/128;
freq=(long int)200000000/t_long;
T=1.0/freq;
keyscan();
//畫圖函數
for(i=0;i<320;i++) //i代表像素點位置，（T/hdiv*32）指的是顯示一個周期至少需要的像素點
{
if(i==320) break;
LCD_SetPos(120+sdiv*y[(uint)(i%(uint)(T/hdiv*32)*127/(T/hdiv*32-1))],120+sdiv*y[(uint)(i%(uint)(T/hdiv*32)*127/(T/hdiv*32))-1],i,i);
Write_Data_U16(0xf800);
}
LCD_PutString(30,20,"峰值:",0x001f,0xffff);
LCD_PutChar8x16( 30, 56, (uchar)(fu*10)/10+48, 0x001f, 0xffff);
LCD_PutChar8x16( 30, 62, '.', 0x001f, 0xffff);
LCD_PutChar8x16( 30, 68, (uchar)(fu*10)%10+48, 0x001f, 0xffff);
LCD_PutChar8x16( 30, 74, 'V', 0x001f, 0xffff);
LCD_PutString(30,130,"頻率:",0x001f,0xffff);
if(freq<1000){
LCD_PutChar8x16(30,166,(int)freq/100+48,0x001f,0xffff);
LCD_PutChar8x16(30,172,(int)freq/10%10+48,0x001f,0xffff);
LCD_PutChar8x16(30,178,(int)freq%10+48,0x001f,0xffff);
LCD_PutString(30,184,"Hz",0x001f,0xffff);
}
if(freq>=1000 && freq/1000<1000){
LCD_PutChar8x16(30,166,(int)(freq/1000/100)+48,0x001f,0xffff);
LCD_PutChar8x16(30,172,(int)(freq/1000/10%10)+48,0x001f,0xffff);
LCD_PutChar8x16(30,178,(int)(freq/1000)%10+48,0x001f,0xffff);
LCD_PutString(30,184,"KHz",0x001f,0xffff);
}
if(freq>=1000000 && freq/1000000<1000){
LCD_PutChar8x16(30,166,(int)(freq/1000000/100)+48,0x001f,0xffff);
LCD_PutChar8x16(30,172,(int)(freq/1000000/10%10)+48,0x001f,0xffff);
LCD_PutChar8x16(30,178,(int)(freq/1000000%10)+48,0x001f,0xffff);
LCD_PutString(30,184,"MHz",0x001f,0xffff);
}
LCD_PutString(30,220,"周期:",0x001f,0xffff);
if(T>=1){
LCD_PutChar8x16(30,256,(int)T+48,0x001f,0xffff);
LCD_PutString(30,262,"s",0x001f,0xffff);
}
if(T<1 && 1000*T>=1){
LCD_PutChar8x16(30,256,(int)(1000*T)/100+48,0x001f,0xffff);
LCD_PutChar8x16(30,262,(int)(1000*T)/10%10+48,0x001f,0xffff);
LCD_PutChar8x16(30,268,(int)(1000*T)%10+48,0x001f,0xffff);
LCD_PutString(30,274,"ms",0x001f,0xffff);
}
if(1000*T<1 && 1000000*T>=1){
LCD_PutChar8x16(30,256,(int)(1000000*T)/100+48,0x001f,0xffff);
LCD_PutChar8x16(30,262,(int)(1000000*T)/10%10+48,0x001f,0xffff);
LCD_PutChar8x16(30,268,(int)(1000000*T)%10+48,0x001f,0xffff);
LCD_PutString(30,274,"us",0x001f,0xffff);
}
//是否延遲
if(key6==0)
{
delayms(10);
if(key6==0)
delayms(10000);
while(!key1);
}
}
}