高手们！帮忙看一下！矩阵键盘扫描，程序！

liutaolinux

目前row0---row2 GPN0 - GPN2
      col0-clo4       GPN4-GPN6 和 GPN9

反转法扫描键盘！大家看看是什么问题！用的是中断！

liutaolinux

static void Scan_Keyboard(void)
{
        unsigned char IOValue = 0;
       
        IOValue |= 0xfff8; // 0 1 2是输出值0
        writel(0xfff8,S3C64XX_GPNDAT);
        Port_Init();/*012 output 4 5 6 9 是input*/
        IOValue = readl(S3C64XX_GPNDAT);
        printk("4569IOVAlue = %d...\n",IOValue);

        if((IOValue & (1 << 4)) == 0)
                COLVAL = 1;
        else if((IOValue & (1 << 5)) == 0)
                COLVAL = 2;
        else if ((IOValue & (1 << 6)) == 0)
                COLVAL = 3;
        else if((IOValue & (1 << 9)) == 0)
                COLVAL = 4;
       
                //反转
        writel(0xfd8f,S3C64XX_GPNDAT);
        port_init();/*012是input 4 5 6 9是output*/
        IOValue = readl(S3C64XX_GPNDAT);
        printk("123IOvalue = %d...\n",IOValue);
        if((IOValue & 1) == 0)
                ROWVAL = 1;
        else if((IOValue & (1 << 1)) == 0)
                ROWVAL = 2;
        else if((IOValue & (1 << 2))        == 0)
                ROWVAL = 3;       
       
        writel(0x2a,S3C64XX_GPNCON);//把0 1 2 重新设置成中断模式
}

liutaolinux

static void Scan_Keyboard(void)
{
        unsigned char IOValue = 0;
       
         这一行是没有的-----//IOValue |= 0xfff8; // 0 1 2是输出值0
        writel(0xfff8,S3C64XX_GPNDAT);
        Port_Init();/*012 output 4 5 6 9 是input*/
        IOValue = readl(S3C64XX_GPNDAT);
        printk("4569IOVAlue = %d...\n",IOValue);

        if((IOValue & (1 << 4)) == 0)
                COLVAL = 1;
        else if((IOValue & (1 << 5)) == 0)
                COLVAL = 2;
        else if ((IOValue & (1 << 6)) == 0)
                COLVAL = 3;
        else if((IOValue & (1 << 9)) == 0)
                COLVAL = 4;
       
                //反转
        writel(0xfd8f,S3C64XX_GPNDAT);
        port_init();/*012是input 4 5 6 9是output*/
        IOValue = readl(S3C64XX_GPNDAT);
        printk("123IOvalue = %d...\n",IOValue);
        if((IOValue & 1) == 0)
                ROWVAL = 1;
        else if((IOValue & (1 << 1)) == 0)
                ROWVAL = 2;
        else if((IOValue & (1 << 2))        == 0)
                ROWVAL = 3;       
       
        writel(0x2a,S3C64XX_GPNCON);//把0 1 2 重新设置成中断模式
}

liutaolinux

反转法  这么写有BUG吗？

liutaolinux

liutaolinux

再补充一个问题  readl  wtitel 函数原型是什么样子的！

T-Bagwell

Why don't you use the kernel symbol functions?
for example irq_request? use the irq_handler ?

liutaolinux

回复 7# T-Bagwell


    where can I find the symbole ?
    i dont know how to change it?
     can you speak chinese

T-Bagwell

回复 8# liutaolinux


    There have no chinese input method in this system
    I'm very lazy,
    you can see all of the symbol in Documentations,
Documentation/input/input.txt
Documentation/input/input-programming.txt

It will provide you how to use it.

liutaolinux

回复 9# T-Bagwell


    thank you very much!
    let me see!
    I will ask you where I can no learn of!