串口通信,要同时接受ABC三相输入电压,其中数据接受方式为A1,B1,C1,A2,B2,C2....A1024,B1024,C1024.共1024*3=3072个数据,其中串口输入缓冲区大小设置为6144,但是运行结果报错“class EStackOverFlow With Message "Stack OverFlow".”
其中,我的程序如下: //处理控件中的该事件,获取底层交换数据和连线状态
procedure TForm5.MSComm1Comm(Sender: TObject);
var
i,inputlen,tmpint:integer;
tmpvar:variant;
begin
if mscomm1.CommEvent=comevreceive then
begin
delay(100);
inputlen:=mscomm1.InBufferCount;
tmpvar:=mscomm1.Input;
count:=count+inputlen;
for i:=0 to inputlen-1 do
begin
tmpint:=tmpvar[i];
index:=i+j;
a[index]:=tmpint;
end;
j:=index+1;
end;
end;//转换并存储数据
procedure TForm5.Button3Click(Sender: TObject);
var
k,x,i:integer;
jj:integer;begin
max1:=-9999.0; max2:=-9999.0; max3:=-9999.0;
s1:=0.0; s2:=0.0;s3:=0.0;s4:=0.0;s5:=0.0;s6:=0.0;
s7:=0.0; s8:=0.0;s9:=0.0;s10:=0.0;s11:=0.0;s12:=0.0;
memo1.Clear;memo2.Clear;memo3.clear;memo4.Clear;
memo5.Clear;memo6.Clear;memo7.clear;memo8.Clear;
memo9.Clear;memo10.Clear;memo11.clear;memo12.Clear;
memo13.Clear; jj:=0;
for k:=0 to (count div 2)-1 do
begin
b[k]:=(a[jj]+256*a[jj+1]);
jj:=jj+2;
if b[k]<$8000 then
begin
b[k]:=b[k]/32768;
end
else
begin
b[k]:=(b[k]-65536)/32678;
end;
end; //显示输入电压曲线
if xuanze=1 then
begin
Fastlineseries1.Clear;Fastlineseries1.Clear;Fastlineseries1.Clear;
i:=0; x:=0;
while(i<3072) do
begin
Fastlineseries1.AddXY(x*0.2,b[i],'',clred);
Fastlineseries2.Addxy(x*0.2,b[i+1],'',clgreen);
Fastlineseries3.Addxy(x*0.2,b[i+2],'',clblue);
i:=i+3;
x:=x+1;
end;
i:=0;
while(i<3072) do
begin
s1:=s1+b[i];
if max1<b[i] then
begin
max1:=b[i];
end;
memo1.Lines.Add(floattostr(b[i]));
memo1.lines.savetofile('A相输入电压.txt');
i:=i+3;
end;
m1:=max1;
v1:=max1/1.414;
a1:=s1/1024;
ComboBox2Change(Sender); i:=1;
while(i<6144) do
begin
s2:=s2+b[i];
if max2<b[i] then
begin
max2:=b[i];
end;
memo2.Lines.Add(floattostr(b[i]));
memo2.lines.savetofile('B相输入电压.txt');
i:=i+3;
end;
m2:=max2;
v2:=max2/1.414;
a2:=s2/1024;
ComboBox3Change(Sender); i:=2;
while(i<3072) do
begin
s3:=s3+b[i];
if max3<b[i] then
begin
max3:=b[i];
end;
memo3.Lines.Add(floattostr(b[i]));
memo3.lines.savetofile('C相输入电压.txt');
i:=i+3;
end;
m3:=max3;
v3:=max3/1.414;
a3:=s3/1024;
ComboBox4Change(Sender);
end;end;请问各位大大,是否输入缓冲区设置过大,数据溢出,要如何处理?谢谢!希望知道的能指点一二,只要诚心回答的都有分,谢谢!
其中,我的程序如下: //处理控件中的该事件,获取底层交换数据和连线状态
procedure TForm5.MSComm1Comm(Sender: TObject);
var
i,inputlen,tmpint:integer;
tmpvar:variant;
begin
if mscomm1.CommEvent=comevreceive then
begin
delay(100);
inputlen:=mscomm1.InBufferCount;
tmpvar:=mscomm1.Input;
count:=count+inputlen;
for i:=0 to inputlen-1 do
begin
tmpint:=tmpvar[i];
index:=i+j;
a[index]:=tmpint;
end;
j:=index+1;
end;
end;//转换并存储数据
procedure TForm5.Button3Click(Sender: TObject);
var
k,x,i:integer;
jj:integer;begin
max1:=-9999.0; max2:=-9999.0; max3:=-9999.0;
s1:=0.0; s2:=0.0;s3:=0.0;s4:=0.0;s5:=0.0;s6:=0.0;
s7:=0.0; s8:=0.0;s9:=0.0;s10:=0.0;s11:=0.0;s12:=0.0;
memo1.Clear;memo2.Clear;memo3.clear;memo4.Clear;
memo5.Clear;memo6.Clear;memo7.clear;memo8.Clear;
memo9.Clear;memo10.Clear;memo11.clear;memo12.Clear;
memo13.Clear; jj:=0;
for k:=0 to (count div 2)-1 do
begin
b[k]:=(a[jj]+256*a[jj+1]);
jj:=jj+2;
if b[k]<$8000 then
begin
b[k]:=b[k]/32768;
end
else
begin
b[k]:=(b[k]-65536)/32678;
end;
end; //显示输入电压曲线
if xuanze=1 then
begin
Fastlineseries1.Clear;Fastlineseries1.Clear;Fastlineseries1.Clear;
i:=0; x:=0;
while(i<3072) do
begin
Fastlineseries1.AddXY(x*0.2,b[i],'',clred);
Fastlineseries2.Addxy(x*0.2,b[i+1],'',clgreen);
Fastlineseries3.Addxy(x*0.2,b[i+2],'',clblue);
i:=i+3;
x:=x+1;
end;
i:=0;
while(i<3072) do
begin
s1:=s1+b[i];
if max1<b[i] then
begin
max1:=b[i];
end;
memo1.Lines.Add(floattostr(b[i]));
memo1.lines.savetofile('A相输入电压.txt');
i:=i+3;
end;
m1:=max1;
v1:=max1/1.414;
a1:=s1/1024;
ComboBox2Change(Sender); i:=1;
while(i<6144) do
begin
s2:=s2+b[i];
if max2<b[i] then
begin
max2:=b[i];
end;
memo2.Lines.Add(floattostr(b[i]));
memo2.lines.savetofile('B相输入电压.txt');
i:=i+3;
end;
m2:=max2;
v2:=max2/1.414;
a2:=s2/1024;
ComboBox3Change(Sender); i:=2;
while(i<3072) do
begin
s3:=s3+b[i];
if max3<b[i] then
begin
max3:=b[i];
end;
memo3.Lines.Add(floattostr(b[i]));
memo3.lines.savetofile('C相输入电压.txt');
i:=i+3;
end;
m3:=max3;
v3:=max3/1.414;
a3:=s3/1024;
ComboBox4Change(Sender);
end;end;请问各位大大,是否输入缓冲区设置过大,数据溢出,要如何处理?谢谢!希望知道的能指点一二,只要诚心回答的都有分,谢谢!
procedure TForm5.MSComm1Comm(Sender: TObject); //转换并存储数据
procedure TForm5.Button3Click(Sender: TObject); ComboBox4Change(Sender); -----这个显示的是幅值,这个没关系,不用关注主要是这个地方出错了:
//处理控件中的该事件,获取底层交换数据和连线状态
procedure TForm5.MSComm1Comm(Sender: TObject);
var
i,inputlen,tmpint:integer;
tmpvar:variant;
begin
if mscomm1.CommEvent=comevreceive then
begin
delay(100);
inputlen:=mscomm1.InBufferCount;
tmpvar:=mscomm1.Input;
count:=count+inputlen;
for i:=0 to inputlen-1 do
begin
tmpint:=tmpvar[i];
index:=i+j;
a[index]:=tmpint;
end;
j:=index+1;
end;
end; 我将输入缓冲区设置为2048,接收转速数据1024时没有出错,可以正常显示,可是在显示三相电压时数据就有1024*3=3072个,因为串口按照高低字节接受,所以缓冲区应该为3072*2=6144,可是在运行接收电压数据程序就显示错误“class EStackOverFlow With Message "Stack OverFlow".”
所以,我想应该是输入缓冲区溢出?
procedure TForm5.MSComm1Comm(Sender: TObject);
var
i,inputlen,tmpint:integer;
tmpvar:variant;
begin
if mscomm1.CommEvent=comevreceive then
begin
delay(100);
inputlen:=mscomm1.InBufferCount;
tmpvar:=mscomm1.Input;
count:=count+inputlen;
for i:=0 to inputlen-1 do
begin
tmpint:=tmpvar[i];
index:=i+j;
a[index]:=tmpint;
end;
j:=index+1;
end;
end;
其中数组a,b的声明如下:
public
{ Public declarations }
a:array[0..20000] of integer;
b:array[0..10000] of currency;
请问,究竟是哪里出错?请各位大大提供宝贵的意见!
procedure TForm5.MSComm1Comm(Sender: TObject);
中的延时函数改为delay(20),其中修改数组a,b的声明如下:
public
{ Public declarations }
a:array[0..10000] of integer;
b:array[0..5000] of currency;
经过多次调试,终于修订为以上参数,运行通过,谢谢各位的支持与帮助!