這兩周配合同事徐軍搞了個(gè)FPGA測試軟件。在測試過程中出現(xiàn)了幾個(gè)問題，現(xiàn)在終于解決了，現(xiàn)在總結(jié)如下：
1、char *pTemp=new char[800];
然后是一些關(guān)于pTemp的操作，例如
for(int i=0;i<800;i++)
{
......;
pTemp++;
}
然后我用delete pTemp;程序運(yùn)行就出現(xiàn)錯(cuò)誤了，經(jīng)過調(diào)試發(fā)現(xiàn)，應(yīng)該char *pBuf; pBuf=pTemp;然后delete pBuf;就可以了。這樣既不會(huì)產(chǎn)生內(nèi)存泄漏，又不會(huì)刪除空的內(nèi)存。
2、軟件定時(shí)刷新顯示，我將從單片機(jī)要來的數(shù)據(jù)顯示在CRichEditCtrl控件上面，代碼如下：
CHARFORMAT CTestView::GetCharFormat(DWORD dwMask)
{
CHARFORMAT cf;
cf.cbSize = sizeof(CHARFORMAT);
cf.dwMask = dwMask;
m_richEdit.GetSelectionCharFormat(cf);
return cf;
}
void CTestView::showData(CString szData,COLORREF crColorData)
{
int len;
CHARFORMAT cf = GetCharFormat(1); //初始化
if (cf.dwEffects & CFE_AUTOCOLOR)
cf.dwEffects -= CFE_AUTOCOLOR;
cf.dwMask= CFM_COLOR;
//寫入數(shù)據(jù)太多時(shí)，richedit控件不能正確顯示顏色，所以分段顯示
int count = szData.GetLength()/5000;
long Base = 0;
for(int i=0;i<count;i++)
{
cf.crTextColor = crColorData;
m_richEdit.SetSelectionCharFormat(cf);
len = m_richEdit.GetWindowTextLength();
m_richEdit.SetSel(len,len);
m_richEdit.ReplaceSel(szData.Mid(Base,szData.GetLength()/count));
Base += szData.GetLength()/count;
}
cf.crTextColor = crColorData;
m_richEdit.SetSelectionCharFormat(cf);
len = m_richEdit.GetWindowTextLength();
m_richEdit.SetSel(len,len);
m_richEdit.ReplaceSel(szData.Mid(Base));
//m_richEdit.LineScroll(m_richEdit.GetLineCount());
m_richEdit.SetModify(FALSE);
}
void CTestView::showString(CString szTitle,COLORREF crColorTitle,
CString szData,COLORREF crColorData)
{
CString szText="";
CHARFORMAT cf= GetCharFormat(1);
if (cf.dwEffects & CFE_AUTOCOLOR)
cf.dwEffects -= CFE_AUTOCOLOR;
cf.dwMask = CFM_COLOR;
cf.crTextColor = crColorTitle;
m_richEdit.SetSelectionCharFormat(cf);
int len = m_richEdit.GetWindowTextLength();
m_richEdit.SetSel(len,len);
m_richEdit.ReplaceSel(szTitle);
m_richEdit.LineScroll(1);
m_richEdit.SetModify(FALSE);
cf.crTextColor = crColorData;
m_richEdit.SetSelectionCharFormat(cf);
len = m_richEdit.GetWindowTextLength();
m_richEdit.SetSel(len,len);
m_richEdit.ReplaceSel(szData);
m_richEdit.LineScroll(1);
m_richEdit.SetModify(FALSE);
cf.crTextColor = RGB(0,0,255);
m_richEdit.SetSelectionCharFormat(cf);
len = m_richEdit.GetWindowTextLength();
m_richEdit.SetSel(len,len);
m_richEdit.ReplaceSel(szText);
m_richEdit.LineScroll(1);
m_richEdit.SetModify(FALSE);
}
在OnInitialUpdate()函數(shù)中，我初始化m_richEdit如下：
//初始化m_richEdit
m_richEdit.Create(WS_VSCROLL|WS_CHILD|WS_VISIBLE|ES_AUTOVSCROLL|ES_MULTILINE|ES_WANTRETURN,
CRect(10,34,486,380), this, 1);
m_richEdit.ModifyStyleEx(1, WS_EX_CLIENTEDGE);
m_richEdit.SetReadOnly();
在定時(shí)顯示里面，我調(diào)用showData()函數(shù)：
row=absoluteAddr;
while(*pTemp!='\0')
{
strtemp=pTemp;
for(i=0;i<48;i++)
pTemp++;
//顯示行號(hào)
str.Format("%04x",row);
row += 0x10;
str += " ";
showData(str,RGB(128,128,0));
//顯示前八個(gè)字節(jié)
str=strtemp.Left(24);
str += " ";
showData(str,RGB(0,0,255));
//顯示后八個(gè)字節(jié)
str=strtemp.Mid(24,24);
showData(str,RGB(0,0,255));
//換行
str="\r\n";
showData(str,RGB(0,0,255));
}
后來發(fā)現(xiàn)一個(gè)問題，當(dāng)顯示行號(hào)為000f時(shí)候，即最后一行的時(shí)候總是回比前面的多往前縮進(jìn)一個(gè)空格，考慮到最后一行還多加了一個(gè)回車換行，我把代碼該成如下：
for(row=absoluteAddr;row<absoluteAddr+0x0F*0x10;row += 0x10)
{
strtemp=pTemp;
for(i=0;i<48;i++)
pTemp++;
//顯示行號(hào)
str.Format("%04x",row);
str += " ";
showData(str,RGB(128,128,0));
//顯示前八個(gè)字節(jié)
str=strtemp.Left(24);
str += " ";
showData(str,RGB(0,0,255));
//顯示后八個(gè)字節(jié)
str=strtemp.Mid(24,24);
showData(str,RGB(0,0,255));
//換行
str="\r\n";
showData(str,RGB(0,0,255));
}
str.Format("%04x",row);
str += " ";
showData(str,RGB(128,128,0));
strtemp=pTemp;
//顯示前八個(gè)字節(jié)
str=strtemp.Left(24);
str += " ";
showData(str,RGB(0,0,255));
//顯示后八個(gè)字節(jié)
str=strtemp.Mid(24,24);
showData(str,RGB(0,0,255));