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GRiSP Erlang Runtime Library

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grisp src pmod_hb5.erl
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src/pmod_hb5.erl 

-module(pmod_hb5).



-export([config/1, stop/1, forward/1, backward/1]).



config(Slot) ->

    grisp_gpio:configure_slot(Slot, {output_0, output_0, input, input}).



start(gpio1) -> grisp_gpio:set(gpio1_2);

start(gpio2) -> grisp_gpio:set(gpio2_2).



stop(gpio1) -> grisp_gpio:clear(gpio1_2);

stop(gpio2) -> grisp_gpio:clear(gpio2_2).





forward(Slot) ->

    stop(Slot),    % Never change direction on a active H-bridge

    direction(Slot, forward),

    start(Slot).





backward(Slot) ->

    stop(Slot),	  % Never change direction on a active H-bridge

    direction(Slot, backward),

    start(Slot).



direction(gpio1, forward)  -> grisp_gpio:clear(gpio1_1);

direction(gpio1, backward) -> grisp_gpio:set(gpio1_1);

direction(gpio2, forward)  -> grisp_gpio:clear(gpio2_1);

direction(gpio2, backward) -> grisp_gpio:set(gpio2_1).