Admin at 21:19, 15 June 2015

2015-06-15T21:19:57Z

Admin: Created page with "= Action = Start a continuous sketch update. ..."

2014-12-12T18:01:06Z

Created page with "= Action = Start a continuous sketch update. ..."

New page

= Action =

Start a continuous sketch update.

 

 

= Syntax =

CmdSketch x, y, w, h, ptr, format

 

 

= Remarks =
<div style="padding: 0px; margin: 0px;">
{| cellspacing="0" cellpadding="0" border="0" style="border: none; border-spacing: 0px; border-collapse: collapse;"
|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
x

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
x-coordinate of sketch area top-left, in pixels

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
y

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
y-coordinate of sketch area top-left, in pixels

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
w

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Width of sketch area, in pixels

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
h

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Height of sketch area, in pixels

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
ptr

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Base address of sketch bitmap

|- style="vertical-align: top;"
| valign="top" width="65" style="width: 65px; border: 2px solid rgb(0, 0, 0);" |
format

| valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
Format of sketch bitmap, either L1 or L8

|}
</div>
 

Please  note that update frequency of  bitmap data in graphics memory depends on sampling frequency of ADC built-in circuit of FT800, which is up to 1000 Hz.

 

After the sketch command, the co-processor engine continuously samples the touch inputs and paints pixels into a bitmap, according to the touch (x, y). This means that the user touch inputs are drawn into the bitmap without any need for MCU work.

Command [[CmdStop]] stops the sketch process.

 

Note that only one of CmdSketch, [[CmdScreenSaver]] or [[CmdSpinner]] can  be active at one time.

 

 

 

= Example =

<source lang="bascomavr">
' see demo - FT800 Sketch.bas also FT800 Demo4.bas (SUB Sketch)
</source>

{{Languages}}

[[Category:FT800 Commands]]

@@ Line 16: / Line 16: @@
 = <span class="f_Header">Remarks</span> =
-<div style="padding: 0px; margin: 0px;">
+<div style="padding: 0px; margin: 0px;"><div style="font-size: 13.3333330154419px; padding: 0px; margin: 0px;">
 {| cellspacing="0" cellpadding="0" border="0" style="border: none; border-spacing: 0px; border-collapse: collapse;"
 |- style="vertical-align: top;"
@@ Line 59: / Line 59: @@
 | valign="top" width="767" style="width: 767px; border: 2px solid rgb(0, 0, 0);" |
 Format of sketch bitmap, either<span style="font-weight: bold;">&nbsp;L1</span>&nbsp;or&nbsp;<span style="font-weight: bold;">L8</span>
 |}
 </div>
 &nbsp;
 Please &nbsp;note that update frequency of &nbsp;bitmap data in graphics memory depends on sampling frequency of ADC built-in circuit of FT800, which is up to 1000 Hz.
@@ Line 68: / Line 77: @@
 <span class="f_Header">&nbsp;</span>
-After the sketch command, the co-processor engine continuously samples the touch inputs and paints pixels into a bitmap, according to the touch (x, y). This means that the user touch inputs are drawn into the bitmap without any need for MCU work.
+&nbsp;
-Command&nbsp;[[CmdStop]]&nbsp;stops the sketch process.
+<span class="f_Header">FT801</span>
-&nbsp;
+<span style="font-size: 11pt; font-family: Calibri;">CmdSketch - Capacitive touch specific sketch This command has the same functionality as CmdSketch except it has done the optimization for a Capacitive Touch Panel.</span>
-Note that only one of&nbsp;CmdSketch,&nbsp;[[CmdScreenSaver]]&nbsp;or&nbsp;[[CmdSpinner]]&nbsp;can &nbsp;be active at one time.
+<span style="font-size: 11pt; font-family: Calibri;">Because Capacitive Touch Panels have lower sampling frequencies (around 100 Hz) to report the coordinates, the sketch functionality updates less frequently compared to resistive touch. CmdSketch introduces &nbsp;a linear interpolation algorithm to provide a smoother effect when drawing the output line.</span>
 &nbsp;
-<span style="font-family: Arial;">&nbsp;</span>
+&nbsp;
-<span style="font-family: Arial;">&nbsp;</span>
+After the sketch command, the co-processor engine continuously samples the touch inputs and paints pixels into a bitmap, according to the touch (x, y). This means that the user touch inputs are drawn into the bitmap without any need for MCU work.
 = <span class="f_Header">Example</span> =

CmdSketch - Revision history

Admin at 21:19, 15 June 2015

Admin: Created page with "= Action = Start a continuous sketch update. ..."