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st7920locate
Anobium edited this page Oct 18, 2020
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1 revision
Syntax:
ST7920Locate ( Xpos, Ypos)
Explanation:
This command locates the pixel at the specific X and Y location of the text screen. Subsequent printing to the GLCD will place a character to the GLCD controller on the specified row and column. Due to the design of the ST7920 controller (to accomodate Mandarin and Cyrillic), you must place the text on the column according to the numbers above the diagram below. The addressing is handle by the command.
|--0--|--1--|--2--|... ...|--7--|
+--+--+--+--+--+---------------------+
|H |e |l |l |o | ... | <- row 0 (address 0x80)
+--+--+--+--+--+---------------------+
|T |h |i |s | |i ... | <- row 1 (address 0x90)
+--+--+--+--+--+---------------------+
|' |' |' |' |' |' ... | <- row 2 (address 0x88)
+--+--+--+--+--+---------------------+
|- |- |- |- |- |- ... | <- row 3 (address 0x98)
+--+--+--+--+--+---------------------+
Writing 'a' onto the 1st column, and 1st row:
|--0--|--1--|--2--|... ...|--7--|
+--+--+--+--+--+---------------------+
| | | | | | ... | <- row 0 (address 0x80)
+--+--+--+--+--+---------------------+
| | |a | | | ... | <- row 1 (address 0x90)
+--+--+--+--+--+---------------------+
| | | | | | ... | <- row 2 (address 0x88)
+--+--+--+--+--+---------------------+
| | | | | | ... | <- row 3 (address 0x98)
+--+--+--+--+--+---------------------+
Example usage:
ST7920Locate ( 64, 31) ‘the pixel at the mid screen point