gpio 调试
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#adb shell
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#cd /sys/devices/virtual/misc/mtgpio/
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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)
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#cat pin
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check out pin setting(take GPIO88 for example)
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#echo –r1 88 > pin
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set GPIO88 paremeter [pin]:[mode] [pullsel] [din] [dout] [pullen] [dir] [dinv]
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#echo -w=88:0 0 0 1 1 1 0 > pin
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set GPIO88 mode 3
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#echo -wmode 88 3 > pin
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set GPIO88 dir out
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#echo -wdir 88 1 > pin
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set GPIO88 dir in
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#echo -wdir 88 0 > pin
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set GPIO88 push enable
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#echo -wpen 88 1 > pin
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set GPIO88 push up
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#echo -wpsel 88 1 > pin
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set GPIO88 out high
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#echo -wdout 88 1 > pin
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set GPIO55 out 26M clock clk: echo -ms [num] [src] [div] > pin
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#echo -w=55:3 0 0 1 1 1 0 > pin
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#echo -ms 3 2 1 > pin
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