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标题: 关于一个中断驱动，请求帮忙，谢！！！！ [打印本页]

作者: fineshang 时间: 2010-01-13 21:38
标题: 关于一个中断驱动，请求帮忙，谢！！！！
写了一个模拟ＳＰＩ驱动，里面嵌入了中断，静态编译进内核２.４，发现中断没有响应，也不会调试。那位大侠指点一下，感激不尽！！！！比较急，谢谢！！！
static int major = 229;
static volatile int dataSPI = 0;

static int spi_drv_open(struct inode* inode, struct file *file)
{
MOD_INC_USE_COUNT;
return 0;
}

static int spi_drv_release(struct inode* inode, struct file *file)
{
MOD_DEC_USE_COUNT;
return 0;
}

static int spi_drv_ioctl(struct inode* inode, struct file *file, int DEVICE_SPI, unsigned int arg)
{
这个函数操作起来没有问题！
}

static int spi_drv_read(struct file *filp, int *buff, size_t count, loff_t *offp)
{
buff = &(dataSPI);
printk("dataSPI = %d\n", *buff);
return 0;
}

static int spi_drv_interrupt(int irq, void *dev_id)
{
volatile int temp = 0;
int power = 1;
int i = 7;
printk("here is in interrupt\n");
for (; i >= 0; i--){
while ((GPEDAT & (1 << 13)) == 0){;};

if ((GPEDAT & (1 << 13)) != 0){
printk("here is in loop\n");
temp = temp + power;
power = power * 2;
}

while ((GPEDAT & (1 << 13)) != 0){;};
}

dataSPI = temp;
enable_irq(IRQ_EINT2);
return 0;
}

static struct file_operations spi_drv_fops =
{
ioctl: spi_drv_ioctl,
open: spi_drv_open,
release: spi_drv_release,
read: spi_drv_read,
};

static int __init spi_drv_init(void)

{
int ret;
unsigned int eint_irq;
int ret_val;
GPFCON = (GPFCON | 0x0030) & 0xFFEF;
printk("SPI Driver.\n");
ret = register_chrdev(major, NAME, &spi_drv_fops);
if (ret<0) {
printk("Unable to register character device!\n");
return ret;
}

eint_irq = IRQ_EINT2;
enable_irq(IRQ_EINT2);
set_external_irq(eint_irq, EXT_RISING_EDGE, GPIO_PULLUP_DIS);

    ret_val = request_irq(eint_irq, spi_drv_interrupt, 0, "READ_SPI", 0);

if (ret_val < 0) {

        return ret_val;

    }

GPGCON = (GPGCON | 0x0000FC30) & 0xFFFF57DF;

GPGUP |= 0x00E4;
GPECON &= 0xF0FFFFFF;

GPEUP |= 0x3000;
printk("SPI Driver init completed!");

return 0;
}

module_init(spi_drv_init);

module_exit(spi_drv_release); 可能风格不是很好，谢大家

作者: emmoblin 时间: 2010-01-14 10:25
你是如何触发的中断？
看看cat /proc/interupt

作者: fineshang 时间: 2010-01-14 15:06
cat /proc/interrupts 里面有
2: 0 READ_SPI
中断2，上升沿触发，没有什么问题阿

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