bspbacklight.cpp

mx27 f14v2 源代码。包括ADS板上诸多驱动的源码。

//
//  Copyright (C) 2006, Freescale Semiconductor, Inc. All Rights Reserved.
//  THIS SOURCE CODE, AND ITS USE AND DISTRIBUTION, IS SUBJECT TO THE TERMS
//  AND CONDITIONS OF THE APPLICABLE LICENSE AGREEMENT
//
//------------------------------------------------------------------------------
//
//  File:  bspbacklight.c
//
//  Provides BSP-specific configuration routines for the backlight driver.
//	Current all functions are stub
//
//------------------------------------------------------------------------------

#include <windows.h>
#include "bsp.h"

//------------------------------------------------------------------------------
// External Functions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
// External Variables
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
// Defines
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
// Types
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
// Global Variables
//------------------------------------------------------------------------------
// Mapped LCDC registers
static CSP_LCDC_REGS *gpBackLightLCD;
//------------------------------------------------------------------------------
// Local Variables
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
// Local Functions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
//
// Function: BSPBacklightInit
//
// This function does BSP initialization
//
// Parameters:
//      None.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPBacklightInit()
{
    PHYSICAL_ADDRESS phyAddr;
    
    // For MX27 reference platform, backlight is contract by contrast pin from
    // LCDC.
    // Mem maps the LCDC module space for user access
    phyAddr.QuadPart = CSP_BASE_REG_PA_LCDC;
    gpBackLightLCD = (CSP_LCDC_REGS *)MmMapIoSpace(phyAddr, sizeof(CSP_LCDC_REGS), FALSE);
    if(gpBackLightLCD  ==  NULL)   
    {
        DEBUGMSG(1, (TEXT("LCDC NILL pointer!\r\n")) );
    }  
}

//------------------------------------------------------------------------------
//
// Function: BSPBacklightDeInit
//
// This function does BSP deinitializaiton
//
// Parameters:
//      None.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPBacklightDeInit()
{
    if(gpBackLightLCD)
    {
        MmUnmapIoSpace(gpBackLightLCD, sizeof(CSP_LCDC_REGS));
        gpBackLightLCD = NULL;
    }
}

//------------------------------------------------------------------------------
//
// Function: BSPBacklightSetIntensity
//
// This function does BSP-sepcific action when the backlight level changed.
//
// Parameters:
//      The current backlight level
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPBacklightSetIntensity(DWORD level)
{
    INSREG32BF(&gpBackLightLCD->PCCR, LCDC_PCCR_PW, level);
}