NSError
*
error;
YDisplay
*
disp;
YDisplayLayer
*
l0,
*
l1;
int
h, w, y, x, vx, vy;
@autoreleasepool
{
// Setup the API to use local USB devices
if([
YAPI
RegisterHub
:
@"usb"
:
&
error
]
!=
YAPI_SUCCESS
)
{
NSLog
(
@"RegisterHub error: %@"
,
[
error localizedDescription
])
;
usage
()
;
return
1
;
}
if(
argc <
2
)
{
disp
=
[
YDisplay
FirstDisplay
]
;
if(
disp
==
nil
)
{
NSLog
(
@"No module connected (check USB cable)"
)
;
usage
()
;
return
1
;
}
}
else
{
NSString
*
target
=
[
NSString
stringWithUTF8String
:
argv
[
1
]]
;
disp
=
[
YDisplay
FindDisplay
:
target
]
;
if(![
disp isOnline
])
{
NSLog
(
@"Module not connected (check identification and USB cable)"
)
;
usage
()
;
return
1
;
}
}
// clear screen (and all layers)
[
disp resetAll
]
;
// retreive the display size
w
=
[
disp get_displayWidth
]
;
h
=
[
disp get_displayHeight
]
;
// reteive the first layer
l0
=
[
disp get_displayLayer
:
0
]
;
// display a text in the middle of the screen
[
l0 drawText
:
w
/
2
:
h
/
2
:
Y_ALIGN_CENTER
:
@"Hello world!"
]
;
// visualize each corner
[
l0 moveTo
:
0
:
5
]
;
[
l0 lineTo
:
0
:
0
]
;
[
l0 lineTo
:
5
:
0
]
;
[
l0 moveTo
:
0
:
h
-
6
]
;
[
l0 lineTo
:
0
:
h
-
1
]
;
[
l0 lineTo
:
5
:
h
-
1
]
;
[
l0 moveTo
:
w
-
1
:
h
-
6
]
;
[
l0 lineTo
:
w
-
1
:
h
-
1
]
;
[
l0 lineTo
:
w
-
6
:
h
-
1
]
;
[
l0 moveTo
:
w
-
1
:
5
]
;
[
l0 lineTo
:
w
-
1
:
0
]
;
[
l0 lineTo
:
w
-
6
:
0
]
;
// draw a circle in the top left corner of layer 1
l1
=
[
disp get_displayLayer
:
1
]
;
[
l1 clear
]
;
[
l1 drawCircle
:
h
/
8
:
h
/
8
:
h
/
8
]
;
// and animate the layer
NSLog
(
@"Use Ctrl-C to stop"
)
;
x
=
0
;
y
=
0
;
vx
=
1
;
vy
=
1
;
while
([
disp isOnline
])
{
x
+=
vx;
y
+=
vy;
if
((
x <
0
)
||
(
x > w
-
(
h
/
4
)))
vx
=
-
vx;
if
((
y <
0
)
||
(
y > h
-
(
h
/
4
)))
vy
=
-
vy;
[
l1 setLayerPosition
:
x
:
y
:
0
]
;
[
YAPI
Sleep
:
5
:&
error
]
;
}
[
YAPI
FreeAPI
]
;
}
return
0
;
12. Using Yocto-Display with Objective-C
66
www.yoctopuce.com
Содержание Yocto-Display
Страница 1: ...Yocto Display User Manual...
Страница 2: ......
Страница 40: ...34 www yoctopuce com...
Страница 52: ...46 www yoctopuce com...
Страница 84: ...78 www yoctopuce com...
Страница 92: ...86 www yoctopuce com...
Страница 130: ...124 www yoctopuce com...
Страница 158: ...22 High level API Reference 152 www yoctopuce com On failure throws an exception or returns a negative error code...
Страница 422: ...416 www yoctopuce com...
Страница 424: ...24 Characteristics 418 www yoctopuce com...
