From 7223bfcc006fdee03e54cae5bbe71ca77afdc69a Mon Sep 17 00:00:00 2001
From: D301_Ubuntu <1395769145@qq.com>
Date: Thu, 11 Apr 2024 10:28:40 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=AE=9A=E6=97=B6=E5=99=A8?=
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Signed-off-by: D301_Ubuntu <1395769145@qq.com>
---
 13_irq/imx6uirq.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/13_irq/imx6uirq.c b/13_irq/imx6uirq.c
index 29d52c2..16c7dc3 100644
--- a/13_irq/imx6uirq.c
+++ b/13_irq/imx6uirq.c
@@ -60,10 +60,22 @@ struct imx6uirq_dev imx6uirq;   /* irq设备 */
 static irqreturn_t key0_handler(int irq,void *dev_id)
 {
     struct imx6uirq_dev *dev = (struct imx6uirq_dev *)dev_id;
-    unsigned char keyvalue;
+    
 
     dev->curkeynum = 0;
 
+    dev->timer.data = (volatile long)dev_id;
+
+    mod_timer(&dev->timer, jiffies + msecs_to_jiffies(10));
+
+    return IRQ_RETVAL(IRQ_HANDLED);
+}
+
+void timer_function(unsigned long arg)
+{
+    struct imx6uirq_dev *dev = (struct imx6uirq_dev *)arg;
+    unsigned char keyvalue;
+
     keyvalue = gpio_get_value(dev->irqkeydesc.gpio);
     if (keyvalue == 0)        /*  按键被按下 */
     {
@@ -73,8 +85,6 @@ static irqreturn_t key0_handler(int irq,void *dev_id)
         atomic_set(&dev->keyvalue, 0x80 | dev->irqkeydesc.value);
         atomic_set(&dev->releasekey, 1);/* 松开标记 */
     }
-
-    return IRQ_RETVAL(IRQ_HANDLED);
 }
 
 static int keyio_init(void)
@@ -114,6 +124,10 @@ static int keyio_init(void)
         return -EFAULT;
     }
 
+    /*  初始化定时器 */
+    init_timer(&imx6uirq.timer);
+    imx6uirq.timer.function = timer_function;
+
     return 0;
 }
 
@@ -192,12 +206,14 @@ static __init imx6uirq_init(void)
     atomic_set(&imx6uirq.releasekey,0);
     keyio_init();
 
+ 
     return 0;
 }
 
 static __exit imx6uirq_exit(void)
 {
-    free_irq(imx6uirq.irqkeydesc.irqnum,&imx6uirq);
+    del_timer_sync(&imx6uirq.timer);
+    free_irq(imx6uirq.irqkeydesc.irqnum, &imx6uirq);
     gpio_free(imx6uirq.irqkeydesc.gpio );
 
     // 注销字符设备驱动
-- 
Gitee