adconst.c

来自「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LE」· C语言 代码 · 共 109 行

/****************************************************************
**                                                              *
**  FILE         :  ADConst.C                                   *
**  COPYRIGHT    :  (c) 2001 .Xiamen Yaxon NetWork CO.LTD       *
**                                                              *
**                                                              *
**  By : CCH 2002.1.15                                          *
****************************************************************/
#include "includes.h"
#include "tools.h"
#include "keyboard.h"
#include "hstctl.h"
#include "screen.h"
#include "winstack.h"
#include "itemmenu.h"
#include "handset.h"
#include "adconst.h"

#if EN_HANDSET > 0



/*
********************************************************************************
*                  DEFINE CONFIG PARAMETERS
********************************************************************************
*/
#define MAX_STEP                            9
#define INIT_STEP                           4
#define VALUE_STEP                          3

/*
********************************************************************************
*                  DEFINE MODULE VARIANTS
********************************************************************************
*/
static INT8U      curvalue;
static KEY_STRUCT curkey;



static void DisplayProc(void)
{
    INT8U linesize;

    AdjustContrast();
    
    linesize = GetScreenLineSize();
    VTL_ClearScreen();
    VTL_ScreenPrintStr("对比度\n ----------+");
    VTL_AbsMovCursor(linesize + 2);
    VTL_ScreenPrintChar(0x83, curvalue);
    OverWriteScreen();
}

static void TurnUp(void)
{
    if (curvalue < MAX_STEP) curvalue++;
    DisplayProc();
}

static void TurnDown(void)
{
    if (curvalue > 0) curvalue--;
    DisplayProc();
}

static void HdlKeyProc(void)
{
    GetKeyMsg(&curkey);
    switch (curkey.key)
    {
        case KEY_UP:
            TurnUp();
            break;
        case KEY_DOWN:
            TurnDown();
            break;
        case KEY_ACK:
            PopWinStack();
            break;
        case KEY_NAK:
            PopWinStack();
            break;
        default:
            break;
    }
}

static WINSTACKENTRY_STRUCT WinStackEntry = {DisplayProc, 0, 0, DisplayProc, HdlKeyProc};

static void ActivateADConst(void)
{
    PushWinStack(&WinStackEntry);
}


ITEMMENU_STRUCT MENU_ADCONST = {ITEM_FCN, "    调节\n   对比度", ActivateADConst, 0, 0};

void InitADConst(void)
{
    curvalue = INIT_STEP;
}

void AdjustContrast(void)
{
    CtlHstContrast(4 + curvalue * VALUE_STEP);
}
#endif