mtk--gpio调试

gpio 调试

–  #adb shell

–  #cd /sys/devices/virtual/misc/mtgpio/

 

▪       check all GPIO setting  index: mode(0~7) pullselect(0 low,1 high) din(1 en) dout(1 en) pullenable(1 en) dir(0 in, 1 out) dinverse(1 en)

-   #cat pin

▪       check out pin setting(take GPIO88 for example)

-   #echo –r1 88 > pin

▪       set GPIO88 paremeter [pin]:[mode] [pullsel] [din] [dout] [pullen] [dir] [dinv]

-   #echo -w=88:0 0 0 1 1 1 0 > pin

▪       set GPIO88 mode 3

-   #echo -wmode 88 3 > pin

▪       set GPIO88 dir out

-   #echo -wdir 88 1 > pin

▪       set GPIO88 dir in

-   #echo -wdir 88 0 > pin

▪       set GPIO88 push enable

-   #echo -wpen 88 1 > pin

▪       set GPIO88 push up

-   #echo -wpsel 88 1 > pin

▪       set GPIO88 out high

-   #echo -wdout 88 1 > pin

 

▪       set GPIO55 out 26M clock clk: echo -ms [num] [src] [div] > pin

-   #echo -w=55:3 0 0 1 1 1 0 > pin

-   #echo -ms 3 2 1 > pin