CmdSketch
Contents |
Action
Start a continuous sketch update.
Syntax
CmdSketch x, y, w, h, ptr, format
Remarks
|
x |
x-coordinate of sketch area top-left, in pixels |
|
y |
y-coordinate of sketch area top-left, in pixels |
|
w |
Width of sketch area, in pixels |
|
h |
Height of sketch area, in pixels |
|
ptr |
Base address of sketch bitmap |
|
format |
Format of sketch bitmap, either L1 or L8 |
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
' see demo - FT800 Sketch.bas also FT800 Demo4.bas (SUB Sketch)| Languages | English |
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