基于TFT彩屏的数字示波器单片机部分代码（TFT的单片机驱动）

ID:140725 · 发表于 2017-3-10 02:25

给大家发次程序的目的是在于，便于大家学习用51大家来驱动TFT2.4彩屏

流程是由触发电路检测周期，fpga数周期和采样，数据发给单片机。单片机通过周期和数据确定横纵坐标，在tft上显示。

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基于tft彩屏的数字示波器单片机编程部分.rar (9.48 KB, 下载次数: 50)

单片机源程序：

#include"head.h"
#include"intrins.h"
sbit key1=P3^2; //水平扫描档
sbit key2=P3^3;
sbit key3=P3^4;
sbit key4=P3^5; //竖直档
sbit key5=P3^6;
sbit key6=P3^7; //延迟
uchar sdiv=1;//默认竖直档
float hdiv=0.000002;//默认水平扫描档
char xdata y[128]; //存放fpga给的每周期128个点
uint i=0;
float T;//周期
float fu=0;//幅值
sbit clk=P2^0;//单片机给fpga的时钟
sbit start=P2^2;//单片机给fpga的标志位
uchar time[3];//存放的fpga给的周期信息
long int t_long;//由周期信息移位得到的周期数（只是个数，需要转化）
long int freq;//频率
void receive()//单片机与fpga通讯部分，每次fpga发给单片机131个点，前3个点是和周期有关的信息，后128个点是每周期波形的数据点
{
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发数据
_nop_();
_nop_();
clk=1;
time[i]=P1; //高电平单片机收数据
}
t_long=((long int)time[2]*256*256+(int)time[1]*256+time[0])*2;//移位得到周期的数数
for(i=0;i<128;i++)
{
clk=1;
_nop_();
_nop_();
clk=0;
_nop_();
_nop_();
clk=1;
if((uchar)P1<128) //对AD而言128相当于0，所以相当于判断正负
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()//检测按键改变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)//循环，每次都是先收到数据，然后显示
{
ClearScreen(0xffff);//清屏
table();//坐标
fu=0;
receive();
fu=fu*5/128;
freq=(long int)200000000/t_long;
T=1.0/freq;
keyscan();
//画图函数
for(i=0;i<320;i++) //i代表像素点位置，（T/hdiv*32）指的是显示一个周期至少需要的像素点
{
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,"频率:",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);
}
//是否延迟
if(key6==0)
{
delayms(10);
if(key6==0)
delayms(10000);
while(!key1);
}
}
}