readbox.c

在ARM7和UC/OSII的平台上实现了GPS自动报站的功能,涉及GPS模块LEA_4S的驱动,位置速寻算法,语音芯片ISD4004的录放音驱动,LED页面管理等等.从启动代码到操作系统的移植以及到业

/*
******************************************************************
*                  XIAMEN YAXON NETWORK CO.LTD.  
*                   XINXI BUILDING,HULI,XIAMEN
*      (c) Copyright 2002,XIAMEN YAXON NETWORK CO.LTD. ,XIAMEN
*                     All Rights Reserved
*
* FileName     :  TEXTBOX.C
* Programmer(s):  WuJingYu
* Description  : 
******************************************************************
*/

/*
*****************************************************************
*                  REVISION HISTORY
*                 
* Date:    2002-10-20
*****************************************************************
*/ 

#define READBOX_GLOBALS

#include "includes.h"
#include "ErrTask.H"
#include "Lcd.h"


static INT8U  LineSize,NumLine;

static void GetReadBoxPara(READBOX *readbox)
{
     NumLine  = readbox->box->numrow;
     LineSize = readbox->box->numcol;
}   

static void PlotPage(READBOX *readbox)
{
     INT16U i,lineheadpos;
     INT8U curline,curpage,totalpage;
     INT8U curpos,nexttext;
     INT8U *ptr;
     
     GetReadBoxPara(readbox);
     curline = 0;
     curpage = 0;
     totalpage = 0;
     curpos = 0;
     lineheadpos = 0;
     ptr = readbox->text;
     
     for (i=0;i<readbox->textlen;i++) {
        nexttext = *(ptr+1); 
        if (*ptr == 0x0D && nexttext == 0x0A) {
           curline++;
           i++;
           curpos = 0;
           lineheadpos = i+1;
           ptr++;
           ptr++;
           if (curline == NumLine) {
               readbox->pagepos[curpage++] = i;
               totalpage++;
               curline = 0;
               continue;
           }   
        }
        if (!(++curpos % LineSize)) {
           if (NeedRoundLine((INT8U*)(readbox->text+lineheadpos),LineSize)) {
              i--; 
           } else {
              ptr++;
           }
           curpos = 0;
           curline++;
           lineheadpos = i+1;
           if (curline == NumLine) {
              if (curpage >= MAXPAGE) {
//                 ErrExit(ERR_READBOX_MAXPAGE);
              }  
              readbox->pagepos[curpage++] = lineheadpos;
              totalpage++;
              curline = 0;
              continue; 
           }
        } else {
           ptr++;
        }
     }
     readbox->curpage = 0;
     readbox->totalpage = totalpage;
}

static void UpdateReadBoxArrow(READBOX *readbox)
{
     if (readbox->totalpage == 0) {
        return;
     } else {
        if (readbox->curpage == 0) {
            ShowUpArrow(OFF);
            ShowDownArrow(ON);
        } else if (readbox->curpage == readbox->totalpage) {
            ShowUpArrow(ON);
            ShowDownArrow(OFF);
        } else {
            ShowUpArrow(ON);
            ShowDownArrow(ON);    
        }    
     }    
}


static void ShowReadBoxText(READBOX *readbox,INT8U updatelcd)
{
     INT8U totalpage,curpage;
     INT16U textlen;
     INT8U *textptr;
     
     LockOutBox(readbox->box);
     ClearOutBox();
     GetReadBoxPara(readbox);
     
     curpage = readbox->curpage;
     totalpage = readbox->totalpage;
     textptr = readbox->text + readbox->pagepos[curpage];
   
     if (totalpage == 0) {
        textptr = readbox->text; 
        textlen = readbox->textlen; 
     } else if (curpage == 0) {
        textptr = readbox->text;
        textlen = readbox->pagepos[curpage];
     } else if (curpage == totalpage) {
        textptr = readbox->text + readbox->pagepos[curpage-1]; 
        textlen = readbox->textlen - readbox->pagepos[curpage-1] ;
     } else {
        textptr = readbox->text + readbox->pagepos[curpage-1] ; 
        textlen = readbox->pagepos[curpage] - readbox->pagepos[curpage-1];
     } 
     Print_Text(textptr,textlen);
     UpdateReadBoxArrow(readbox);
     UpdateOutBox_MEM();
     if (updatelcd) {
        UpdateOutBox_LCD();
     }   
}

static void PageDown(READBOX *readbox)
{
     if (readbox->curpage == readbox->totalpage) return;
     ++readbox->curpage ;
     ShowReadBoxText(readbox,1);
}   

static void PageUp(READBOX *readbox)
{
     if (readbox->totalpage == 0 || readbox->curpage == 0) return;
     --readbox->curpage;
     ShowReadBoxText(readbox,1);
}

void InitReadBox(READBOX *readbox)
{
     PlotPage(readbox);
}     

void CreateReadBox(READBOX *readbox)
{
     ShowReadBoxText(readbox,0);
     CreateBorder(readbox->box);
}
    
void ClearReadBox(READBOX *readbox)
{
     LockOutBox(readbox->box);
     ClearOutBox();
     UpdateOutBox_MEM();
     UpdateOutBox_LCD();
     UnLockOutBox(readbox->box);
}
    
void RefreshReadBox(READBOX *readbox)
{
     PlotPage(readbox);
     ShowReadBoxText(readbox,1);
     
}    


void AddRaadBoxText(READBOX *readbox,INT8U *text,INT16U textlen)
{
     readbox->text = text;
     readbox->textlen = textlen;
}    

BOOLEAN ReadBox_HdlKey(READBOX *readbox)
{
      INT8U key;
      void (*ExecFunc)(void);
      
      key = GetCurLcdKey();
      switch (key) {
         case KEY_UP:
            PageUp(readbox);
            return TRUE;
         case KEY_DOWN:
            PageDown(readbox);
            return TRUE;
         case  KEY_ACK:
            ExecFunc = readbox->execfunc;
            if (ExecFunc != NULL) {
               (*ExecFunc)();
               return TRUE;
	    }else{
	       return FALSE;
	    }
         default:
            return FALSE;    
      }
}