[原创] 新年献礼：LM3S8962开发板+2.8寸TFT移植过程及源码工程

fengzhang2002 2011-1-8 14:33 楼主

答应大家的教程有好几个了，今天有点空先补上一个，希望大家感兴趣

一、准备工作

1、开发板为坛子里搞活动试用的LM3S8962开发板，图片坛子里很多就不发了

2、2.8寸TFT彩屏，淘宝上选购的48元2.8寸带触摸（无山寨图标） TFT 液晶屏，个人感觉还是比较超值，显示效果很细腻，说是SONY手机的屏

http://item.taobao.com/item.htm?id=4896524706

3、排线或者杜邦线，看大家自己的爱好了，我接9B92开发板是用的排线，接8962用的杜邦线

二、电路连接示意图

三、移植驱动

我是在rdk-idm的6918开发板的代码上移植的，只需要修改drivers目录下的formike240x320x16_ili9320.c文件中的对应GPIO口定义即可

#define LCD_DATAH_BASE          GPIO_PORTA_BASE
#define LCD_DATAL_BASE          GPIO_PORTB_BASE
#define LCD_RST_BASE            GPIO_PORTG_BASE
#define LCD_RST_PIN             GPIO_PIN_0
#define LCD_RS_BASE             GPIO_PORTC_BASE
#define LCD_RS_PIN              GPIO_PIN_4
#define LCD_RD_BASE             GPIO_PORTC_BASE
#define LCD_RD_PIN              GPIO_PIN_5
#define LCD_WR_BASE             GPIO_PORTC_BASE
#define LCD_WR_PIN              GPIO_PIN_6
#define LCD_BL_BASE             GPIO_PORTC_BASE
#define LCD_BL_PIN              GPIO_PIN_7

主函数如下：

int
main(void)
{
    tContext sContext;
    tRectangle sRect;
    unsigned long ulUser0, ulUser1, ulLastIPAddr, ulIPAddr;
    unsigned char pucMACAddr[6];
    char pcBuffer[32];

    //
    // 初始化时钟
    //
    SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_8MHZ);

    SysTickPeriodSet(SysCtlClockGet() / TICKS_PER_SECOND);
    SysTickEnable();
    SysTickIntEnable();

IntMasterEnable();

//FlashUserGet(&ulUser0, &ulUser1);

    pucMACAddr[0] = 0x01;
    pucMACAddr[1] = 0x23;
    pucMACAddr[2] = 0x45;
    pucMACAddr[3] = 0x67;
    pucMACAddr[4] = 0x89;
    pucMACAddr[5] = 0xab;

    //lwIPInit(pucMACAddr, 0, 0, 0, IPADDR_USE_DHCP);
    lwIPInit(pucMACAddr, 0xc0a8010b, 0xffffff00, 0x00000000, IPADDR_USE_STATIC);
    //LocatorInit();
    //LocatorMACAddrSet(pucMACAddr);
    //LocatorAppTitleSet("RDK-IDM hello");
    //SoftwareUpdateInit(SoftwareUpdateRequestCallback);

    //
    // 初始化显示器驱动
    //
    Formike240x320x16_ILI9320Init();

    //
    // 打开背光
    //
    Formike240x320x16_ILI9320BacklightOn();

    //
    // 初始化显示器上下文
    //
    GrContextInit(&sContext, &g_sFormike240x320x16_ILI9320);

    //
    // 填充24行为蓝色
    //
    sRect.sXMin = 0;
    sRect.sYMin = 0;
    sRect.sXMax = GrContextDpyWidthGet(&sContext) - 1;
    sRect.sYMax = 23;
    GrContextForegroundSet(&sContext, ClrDarkBlue);
    GrRectFill(&sContext, &sRect);

    //
    // 画白色边框
    //
    GrContextForegroundSet(&sContext, ClrWhite);
    GrRectDraw(&sContext, &sRect);

    //
    // 显示用应用程序名称
    //
    GrContextFontSet(&sContext, &g_sFontCm20);
    GrStringDrawCentered(&sContext, "hello", -1,
                         GrContextDpyWidthGet(&sContext) / 2, 11, 0);

    //
    // 显示 hello eeworld
    //
    GrContextFontSet(&sContext, &g_sFontCm40);
    GrStringDrawCentered(&sContext, "Hello EEWorld!", -1,
                         GrContextDpyWidthGet(&sContext) / 2,
                         ((GrContextDpyHeightGet(&sContext) - 24) / 2) + 24,
                         0);

    //
    // Display the MAC address (so that the user can perform a firmware update
    // if required).
    //
    usprintf(pcBuffer,
             "MAC: %02x-%02x-%02x-%02x-%02x-%02x",
             pucMACAddr[0], pucMACAddr[1], pucMACAddr[2], pucMACAddr[3],
             pucMACAddr[4], pucMACAddr[5]);
    GrContextFontSet(&sContext, &g_sFontCm20);
    GrStringDrawCentered(&sContext, pcBuffer, -1,
                         GrContextDpyWidthGet(&sContext) / 2,
                         GrContextDpyHeightGet(&sContext) - 20, 0);

    //
    // Flush any cached drawing operations.
    //
    GrFlush(&sContext);

    //
    // Assume we don't have an IP address yet.
    //
    ulLastIPAddr = 0;

    //
    // Loop until someone requests a remote firmware update. Inside the loop,
    // we check the IP address and update the display. This information is
    // needed to allow someone to configure the LMFlash application to update
    // the board but the IP address is likely not available by the time we
    // get here initially.
    //
    while(!g_bFirmwareUpdate)
    {
        //
        // What is our current IP address?
        //
        ulIPAddr = lwIPLocalIPAddrGet();

        //
        // If it changed, update the display.
        //
        if(ulIPAddr != ulLastIPAddr)
        {
            ulLastIPAddr = ulIPAddr;

            usprintf(pcBuffer, "IP: %d.%d.%d.%d",
                     ulIPAddr & 0xff, (ulIPAddr >> 8) & 0xff,
                     (ulIPAddr >> 16) & 0xff, ulIPAddr >> 24);
            GrStringDrawCentered(&sContext, pcBuffer, -1,
                                 GrContextDpyWidthGet(&sContext) / 2,
                                 GrContextDpyHeightGet(&sContext) - 40, 0);
        }
    }

    //
    // If we drop out, a remote firmware update request has been received.
    //

    //
    // Tell the user what's up
    //
    GrContextFontSet(&sContext, &g_sFontCm40);
    GrStringDrawCentered(&sContext, " Updating... ", -1,
                         GrContextDpyWidthGet(&sContext) / 2,
                         ((GrContextDpyHeightGet(&sContext) - 24) / 2) + 24,
                         true);

    //
    // Transfer control to the bootloader.
    //
    //SoftwareUpdateBegin();

    //
    // The boot loader should take control, so this should never be reached.
    // Just in case, loop forever.
    //
    while(1)
    {
    }
}

完整工程代码如下：