Hardware Reference
In-Depth Information
Example 2-4. Reading a pushbutton with a pull-up and pull-down resistor
(pushbuttonPullup.js)
#!/usr/bin/env node
var
b
=
require
(
'bonescript'
);
var
buttonTop
=
'P9_26'
;
b
.
pinMode
(
buttonTop
,
b
.
INPUT
,
7
,
'pullup'
,
'fast'
,
doAttachTop
);
function
doAttachTop
(
x
) {
if
(
x
.
err
) {
console
.
log
(
'x.err = '
+
x
.
err
);
return
;
}
b
.
attachInterrupt
(
buttonTop
,
true
,
b
.
CHANGE
,
printStatus
);
}
var
buttonBot
=
'P9_42'
;
b
.
pinMode
(
buttonBot
,
b
.
INPUT
,
7
,
'pulldown'
,
'fast'
,
doAttachBot
);
function
doAttachBot
(
x
) {
if
(
x
.
err
) {
console
.
log
(
'x.err = '
+
x
.
err
);
return
;
}
b
.
attachInterrupt
(
buttonBot
,
true
,
b
.
CHANGE
,
printStatus
);
}
function
printStatus
(
x
) {
if
(
x
.
attached
) {
console
.
log
(
"Interrupt handler attached"
);
return
;
}
console
.
log
(
'x.value = '
+
x
.
value
);
console
.
log
(
'x.err = '
+
x
.
err
);
}
