128 x 64 LCD Display Terminal
SOH ETX Serial Protocol Features

Command Specification In
Out
Print  <SOH>
"P"
{Row 0-7 in Two Digit ASCII Hex}
{Starting Column 0-127(00h-7Fh) in Two Digit ASCII Hex}
{Font 0-3 in Single Digit ASCII Hex}
   • Small 5 x 8(.151" Character height)
   • Large 9 x 16(.302" Character height)
   • Micro 4 x 5(Caps Only)(.094" Character height)
   • Giant #'s 30 x 56(#'s Only)(.105" Character height)
{Type 1, 2, 4, 8, 16, 32(00h-3Fh) in Two Digit ASCII Hex}
   • Normal
   • Inverted
   • Underlined
   • Outlined
{Justification 0, 1, 2, 3 in Single Digit ASCII Hex }
   • Left
   • Center
   • Right
   • Absolute
{Up to 25 characters of text to be displayed}
<ETX>

Example: <SOH>P0000010 TEST<ETX> would print “TEST” on row 0, column 0, with a 5x7 font

 I
Clear  <SOH>
"C"
{Row 0-7 in Two Digit ASCII Hex}
{Starting Column 0-127(00h-7Fh) in Two Digit ASCII Hex}
{Ending Column 0-127(00h-7Fh) in Two Digit ASCII Hex}
<ETX>
Example: <SOH>C0007F <ETX> would clear Row 0 from column 0 to column 127 		I
Graphic  <SOH>
"G"
{Row 0-255 in Two Digit ASCII Hex(Bit Mask, with line0 being LSB)}
{Starting Column 0-127(00h-7Fh) in Two Digit ASCII Hex}
{Data 0-255(00h-FFh) in Two Digit ASCII Hex}
<ETX>
Example: <SOH>G0100 001FF<ETX> would draw a vertical line on row 0, 8 bits high 		I
Horizontal Load(Bitmap)  <SOH>
"H"
{Row 0-255 in Two Digit ASCII Hex(Bit Mask, with line0 being LSB)}
{Starting Column 0-127(00h-7Fh) in Two Digit ASCII Hex}
{Length of Data 0-127(00h-7Fh) in Two Digit ASCII Hex}
{Data 0-255(00h-FFh) in Two Digit ASCII Hex}
<ETX>
Example: <SOH>H010000xxxx.... <ETX> would display bitmap data on the upper row  		I
Line  <SOH>
"L"
{X Start0-255 in Two Digit ASCII Hex}
{Y Start 0-255 in Two Digit ASCII Hex}
{X End 0-255 in Two Digit ASCII Hex}
{Y End 0-255 in Two Digit ASCII Hex}
{Color 0-15 in Single Digit ASCII Hex}
<ETX>
Example: <SOH>L00007F3F1 <ETX> would draw a diagonal line on the display 		I
Box  <SOH>
"B"
{Upper Left X 0-255 in Two Digit ASCII Hex}
{Upper Left Y 0-255 in Two Digit ASCII Hex}
{Bottom Right X 0-255 in Two Digit ASCII Hex}
{Bottom Right Y 0-255 in Two Digit ASCII Hex}
{Color 0-15 in Single Digit ASCII Hex}
<ETX>
Example: <SOH>B00007F3F1<ETX> would draw a box around the display 		I
Pixel  <SOH>
"X"
{X 0-255 in Two Digit ASCII Hex}
{Y 0-255 in Two Digit ASCII Hex}
{Color 0-15 in Single Digit ASCII Hex}
<ETX>
Example: <SOH>X3F1F1<ETX> would draw a circle in the middle of the display 		I
Circle  <SOH>
"l"
{X 0-255 in Two Digit ASCII Hex}
{Y 0-255 in Two Digit ASCII Hex}
{Radius 0-255 in Two Digit ASCII Hex}
{Color 0-15 in Single Digit ASCII Hex}
<ETX>
Example: <SOH>l3F1F101<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
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 4/13/05