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final fix swd pin 3 8and po15 i/o bridge from gnd power pack also disable frame blue led on stm 32 sorry didnt know i could hook up a I/0 to gnd this works :) please test and let me know better swiching between stm mcu and power pack


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this is the best methood seem the pc and power pack are switching via io pin and swd pin 3

dont know why its working may need a resister or diode on i/o 

 

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new update 29/06/2017

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100 k resister and diod line pointing down from power pack  and hook to pin pb3 where hub 75  is and pd13 on top of i/0 pins

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