yaoming,
你好。很久没来这了。
碰到一个SD卡的问题,我的系统我加上了SD卡,结果:在linux系统启动的情况下热插入SD卡时没问题,但是热拔的时候,系统会重启。
[root@ShDemo root]#[ 96.352940] mmc0: new high speed MMC card at address 0001
[ 96.370255] mmcblk0: mmc0:0001 AF HMP 980 MiB
[ 96.386718] mmcblk0: p1
[ 111.420244] mmc0: card 0001 removed
tcpsvd: got signal 2, exit
[root@ShDemo root]#
[@ShDemo root]#
[@ShDemo root]#umount: tmpfs busy - remounted read-only
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to all processes
Requesting system reboot
[ 113.849340] musb-hdrc musb-hdrc: remove, state 1
[ 113.854159] usb usb1: USB disconnect, address 1
[ 113.907625] musb-hdrc musb-hdrc: USB bus 1 deregistered
[ 113.924442] USB 1.1 clocked from USB 2.0 PHY -- can't power it down
[ 113.960700] Restarting system.
AM1808 initialization passed!
Booting TI User Boot Loader
UBL Version: 1.65
UBL Flashtype: NAND
Starting NAND Copy...
... ...
有人说是热插拔时对系统的电源产生了干扰,然后我就在sd卡座子边上的电源焊了个10uf的电容,结果还是一样。
又有人说是热插拔时,判断sd卡插入的pin的电平抖动引起的,但是为何插入的时候不重启呢?
请帮忙看看是什么原因。
谢谢。