bspbacklight.cpp

来自「Freescale IMX31 ADS Demo board backlight」· C++ 代码 · 共 111 行

//------------------------------------------------------------------------------
//
//  Copyright (C) 2005, Freescale Semiconductor, Inc. All Rights Reserved
//  THIS SOURCE CODE IS CONFIDENTIAL AND PROPRIETARY AND MAY NOT
//  BE USED OR DISTRIBUTED WITHOUT THE WRITTEN PERMISSION OF
//  Freescale Semiconductor, Inc.
//
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
//
//  File:  bspbacklight.c
//
//  Provides BSP-specific configuration routines for the backlight driver.
//  The routines in this file assume that we use IPU built-in pulse-width
//  modulator,
//
//------------------------------------------------------------------------------
#include <windows.h>
#include "bsp.h"

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


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


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


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


//------------------------------------------------------------------------------
// Global Variables


//------------------------------------------------------------------------------
// Local Variables
static PCSP_IPU_REGS g_pIPU;

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


//------------------------------------------------------------------------------
//
// Function: BSPBacklightInitialize
//
// This function maps the IPU registers.
//
// Parameters:
//      None.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPBacklightInitialize()
{
    PHYSICAL_ADDRESS phyAddr;

    phyAddr.QuadPart = CSP_BASE_REG_PA_IPU;

    // Map peripheral physical address to virtual address
    g_pIPU = (PCSP_IPU_REGS)MmMapIoSpace(phyAddr, sizeof(CSP_IPU_REGS), FALSE);
}


//------------------------------------------------------------------------------
//
// Function: BSPBacklightRelease
//
// This function initializes the camera sensor module.
//
// Parameters:
//      None.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPBacklightRelease()
{
    return;
}


//------------------------------------------------------------------------------
//
// Function: BSPSetupCamera
//
// This function initializes the camera sensor module.
//
// Parameters:
//      None.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPBacklightSetIntensity(DWORD level)
{
    INSREG32BF(&g_pIPU->SDC_CUR_BLINK_PWM_CTRL,
               IPU_SDC_CUR_BLINK_PWM_CTRL_PWM,
               level);
}