PIC Programming - Matrix Orbital LCD's

Driving Matrix Orbital serial LCD displays

I modified Mark Crosbies LCD library so that it works with Matrix Orbital LCDs, which have somewhat different commands to the Scott Edwards Electronics LCDs the library was originally written for. You can use the library for either type of LCD by setting a #define. Note that Matrix Orbital rows and columns are numbered from 1.

Here is my library source code.

I have made the following changes to the library:

lcd_scroll_left and lcd_scroll_right are not implemented for Matrix Orbital LCDs.

void lcd_printnum(unsigned short x, char digits) Print a number with leading zero suppression, and selectable significant digits

Similar to lcd_printdec, but this routine can print any value up to 65535, and leading zeros are suppressed. The number of characters to print is selected by the digits parameter.

The following commands are only implemented for Martix Orbital LCDs.

void lcd_command(char cmd) Send an arbitrary command to the LCD

Sends a command to the LCD. Since there are quite a large number of single character commands, I decided it was more efficient to send them to the LCD via one common routine than to have a separate piece of code for each one. You can access the commands for your program here

void lcd_bargraph_vert( char column, char length) display vertical bargraph

Displays a vertical bargraph of size length at the specified column. The bar can be between 0 and 8 * the number of rows in the display [e.g. 32 for a 4 line display].

void lcd_bargraph_horiz( char row, char column, char direction, char length) display horizontal bargraph

Displays a horizontal bargraph at row,column with the specified length. The length can be between 0 and 5 * the number of columns in the display [e.g. 100 for a 20 column display]. The graph displays L to R if direction is 0 and R to L if direction is 1.

Back Home