320 x 240 LCD Display Terminal with Touchscreen
SOH ETX Serial Protocol Features

Command Specification In
Out
Print  <SOH>
"P"
{Row 0-239(00h-EFh) in Two Digit ASCII Hex}
{Starting Column 0-319(000h-13Fh) in Three Digit ASCII Hex}
{Font 0-5 in Single Digit ASCII Hex}
   • Small 5 x 8(.0755" Character height)
   • Large 9 x 16(.151" Character height)
   • Micro 4 x 5(Caps Only)(.047" Character height)
   • Giant #'s 30 x 56(#'s Only)(.529" Character height)
{Type 1, 2(1h-2Fh) in Single Digit ASCII Hex}
   • Normal
   • Inverted
   {Justification 0, 1, 2, 3 in Single Digit ASCII Hex }
   • Left
   • Center
   • Right
   • Absolute
{Color 0 or 1 in Single Digit ASCII Hex }
   • 0 = Off
   • 1 = On
{Characters of text to be displayed}
<ETX>

Example: <SOH>P00000101 TEST<ETX> would print “TEST” on row 0, column 0, with a 5x7 font

 I
Clear  <SOH>
"C"
{Starting Row 0-239(00h-EFh) in Two Digit ASCII Hex}
{Ending Row 0-239(00h-EFh) in Two Digit ASCII Hex}
{Starting Column 0-319(000h-13Fh) in Two Digit ASCII Hex}
{Ending Column 0-319(000h-13Fh) in Two Digit ASCII Hex}
<ETX>
Example: <SOH>C000000013F <ETX> would clear Row 0 from column 0 to column 319 		I
Horizontal Load(Bitmap)  <SOH>
"H"
{Row 0-239(00h-00EFh) in Two Digit ASCII Hex}
{Starting Column 0-319(000h-13Fh) in Three Digit ASCII Hex}
{Length of Data 0-319(000h-13Fh) in Three Digit ASCII Hex}
{Data 0-255(00h-FFh) in Two Digit ASCII Hex}
<ETX>
Example: <SOH>H01000001xxxx.... <ETX> would display bitmap data on the upper row  		I
Line  <SOH>
"L"
{X Start0-319(000h-13Fh) in Three Digit ASCII Hex}
{Y Start 0-239(00h-EFh) in Two Digit ASCII Hex}
{X End 0-319(000h-13Fh) in Three Digit ASCII Hex}
{Y End 0-255(00h-EFh) in Two Digit ASCII Hex}
{Color 0-1(0h or 1h) in Single Digit ASCII Hex}
<ETX>
Example: <SOH>L0000013FEF1 <ETX> would draw a diagonal line on the display 		I
Box  <SOH>
"B"
{Upper Left X 0-319(000h-13Fh) in Three Digit ASCII Hex}
{Upper Left Y0-239(00h-EFh) in Two Digit ASCII Hex}
{Bottom Right X0-319(000h-13Fh) in Three Digit ASCII Hex}
{Bottom Right Y0-239(00h-EFh) in Two Digit ASCII Hex}
{Color0-1(0h or 1h) in Single Digit ASCII Hex}
<ETX>
Example: <SOH>B0000013FEF1<ETX> would draw a box around the display 		I
Pixel  <SOH>
"X"
{X 0-319(000h-13Fh) in Three Digit ASCII Hex}
{Y 0-239(00h-EFh) in Two Digit ASCII Hex}
{Color0-1 in Single Digit ASCII Hex}
<ETX>
Example: <SOH>X0A0781<ETX> would draw a circle in the middle of the display 		I
Circle  <SOH>
"l"
{X 0-319(000h-13Fh) in Three Digit ASCII Hex}
{Y0-239(00h-EFh) in Two Digit ASCII Hex}
{Radius0-319(000h-13Fh) in Three Digit ASCII Hex}
{Color 0-1(0h or 1h) in Single Digit ASCII Hex}
<ETX>
Example: <SOH>X0A0781<ETX> would draw a circle in the middle of the display 		I
Tone  <SOH>
"T"
{Frequency 0-4095Hz (00-FFF) in Three Digit ASCII Hex}
{Duration 0-255 Seconds/50 (00-FF) in Two Digit ASCII Hex}
<ETX>
Example: <SOH>T01A32 <ETX> would play a tone of 26Hz, for 50 Fiftieths(1 Second) 		I
Keystroke  <SOH>
"K"
{Two Digit ASCII Hex keycode}
<ETX>
Example: <SOH>K30<ETX> would be sent when key zero is pressed 		O
Touchscreen  <SOH>
"t"
X touch location 0-319(0000h-013Fh) in Four Digit ASCII Hex
Y touch location 0-239(0000h-00EFh) in Four Digit ASCII Hex
{Transmitted by Display when touchscreen was touched}
<ETX>
Example: <SOH>t00A00078<ETX> would be sent when touch screen is pressed in middle of screen 		O
Reset  <SOH>
"R"
{Transmitted on Display power up, to let host know display was reset}
<ETX>
Example: <SOH>R<ETX> would be sent when key zero is pressed 		O
When a displays address is set to greater than zero, commands to and from the display require/have a two digit ascii hex address between the <SOH> and the command letter.  If a message is sent to address zero, it is considered a broadcast, and displays on all displays.
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Ackerman Computer Sciences
6233 East Sawgrass Road
Sarasota, Florida 34240-8922
Phone (941)377-5775 -- Fax (941)378-4226

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Last Updated 8/04/08