Onda VX747: improve the USB insertion detection

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21001 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 7 insertions, 1 deletions

diff --git a/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c b/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c
index e519efc4ab..5ba8dd6981 100644
--- a/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c
@@ -633,9 +633,15 @@ void usb_init_device(void)
 }
 
 #ifdef USB_GPIO_IRQ
+static unsigned long last_tick;
 void USB_GPIO_IRQ(void)
 {
-    usb_status_event(usb_detect());
+    /* Prevent enabled-disabled bouncing */
+    if(current_tick - last_tick > HZ/16)
+    {
+        usb_status_event(usb_detect());
+        last_tick = current_tick;
+    }
 }
 #endif