Hardware Reference
In-Depth Information
// This is an example of driving a DC motor
var
b
=
require
(
'bonescript'
);
var
motor
=
'P9_16'
,
// Pin to drive transistor
min
=
0.05
,
// Slowest speed (duty cycle)
max
=
1
,
// Fastest (always on)
ms
=
100
,
// How often to change speed, in ms
speed
=
0.5
,
// Current speed;
step
=
0.05
;
// Change in speed
b
.
pinMode
(
motor
,
b
.
ANALOG_OUTPUT
,
6
,
0
,
0
,
doInterval
);
function
doInterval
(
x
) {
if
(
x
.
err
) {
console
.
log
(
'x.err = '
+
x
.
err
);
return
;
}
var
timer
=
setInterval
(
sweep
,
ms
);
}
function
sweep
() {
speed
+=
step
;
if
(
speed
>
max
||
speed
<
min
) {
step
*= -
1
;
}
b
.
analogWrite
(
motor
,
speed
);
console
.
log
(
'speed = '
+
speed
);
}
process
.
on
(
'SIGINT'
,
function
() {
console
.
log
(
'Got SIGINT, turning motor off'
);
clearInterval
(
timer
);
// Stop the timer
b
.
analogWrite
(
motor
,
0
);
// Turn motor off
});
