{"id":4256,"date":"2012-01-05T18:04:14","date_gmt":"2012-01-05T23:04:14","guid":{"rendered":"http:\/\/embedded-lab.com\/blog\/?p=4256"},"modified":"2012-11-06T13:52:44","modified_gmt":"2012-11-06T18:52:44","slug":"lab-20-interfacing-a-ks0108-based-graphics-lcd-part-2","status":"publish","type":"post","link":"https:\/\/embedded-lab.com\/blog\/lab-20-interfacing-a-ks0108-based-graphics-lcd-part-2\/","title":{"rendered":"Lab 20: Interfacing a KS0108 based Graphics LCD (Part 2)"},"content":{"rendered":"

In the first part<\/strong><\/a> of this tutorial, we discussed about Winstar\u2019s WDG0151-TMI GLCD module, which is a 128\u00d764 pixel monochromatic display built with KS0108B and KS0107B compatible display controllers. The module was interfaced to a PIC16F887 microcontroller and a test program was written in C to demonstrate how to implement the KS0108 instruction set in the firmware of PIC to activate display pixels on the screen. We wrote our subroutine programs that would turn the GLCD on, move the display location to a specified row and column, and draw a pixel at a given coordinates. You might have realized it by now that how much of effort is required to write the firmware for just plotting a point on a GLCD screen. Today’s discussion will focus more on using the built-in GLCD library routines of mikroC Pro for PIC compiler, which will make your life a lot easier if you are using a graphical LCD in your project.<\/p>\n

\"\"<\/a>

Using MikroC Pro for PIC GLCD library<\/p><\/div>\n

GLCD Library of mikroC Pro for PIC<\/strong><\/p>\n

The mikroC Pro for PIC provides GLCD library for a 128×64 pixel graphical LCD with Samsung KS0108\/KS0107 controller chips. The library routines are categorized into two types: basic<\/strong> and advanced<\/strong>. Before using any library routine, following pin definitions is required. For our case (see the circuit diagram in the\u00a0 first part<\/strong><\/a>) where PORTD is used for data and PORTB pins for control signals, the GLCD pin settings should be defined as follows. Remember that the data lines must be on a single port.<\/p>\n\n

\/\/ glcd pinout settings<\/span>\n char<\/span> GLCD_DataPort at PORTD;<\/span>\n sbit GLCD_CS1 at RB0_bit;<\/span>\n sbit GLCD_CS2 at RB1_bit;<\/span>\n sbit GLCD_RS at RB2_bit;<\/span>\n sbit GLCD_RW at RB3_bit;<<\/span>strong><\/<\/span>strong><\/span>\n sbit GLCD_EN at RB5_bit;<\/span>\n sbit GLCD_RST at RB4_bit;<\/span>\n sbit GLCD_CS1_Direction at TRISB0_bit;<\/span>\n sbit GLCD_CS2_Direction at TRISB1_bit;<\/span>\n sbit GLCD_RS_Direction at TRISB2_bit;<\/span>\n sbit GLCD_RW_Direction at TRISB3_bit;<\/span>\n sbit GLCD_EN_Direction at TRISB5_bit;<\/span>\n sbit GLCD_RST_Direction at TRISB4_bit;<\/span><\/pre><\/td><\/tr><\/table><\/div>\n\n
Basic routines:<\/strong><\/p>\n