84x48 LCD Display PCD8544 Module for Nokia 5110 Raspberry Pi

Product Description

Raspberry Pi drive PCD8544 course:

1. How to connect hardware:
2. The connection mode of B version

The insertion mode of B+ version: Please bear in mind that among 2*20P pin header of B+, the 2*13P pin header in the front are fully compatible with B version, namely their signal definition is exactly the same. So module program for B+ and B are totally compatible with each other!


1. Install wiring pi. First

   cd ~
git clone git://git.drogon.net/wiringPi
cd wiringPi

2. Establish working directory

   cd ~
mkdir cpu_show

3. Download source code to  /home/pi/cpu_show through SFTP

4. Compile source code

   cd ~/cpu_show

cc -o cpushow pcd8544_rpi.c PCD8544.c  -L/usr/local/lib –lwiringPi

//Final execution and result-check
sudo ./cpushow

//////////////////////Knowledge on Contrast Modification//////////////////////////
// There are differences in contrast between each LCD, so if your found
//content displayed is too dark or too light,
//you’ll need to modify contrast variables of source code pcd8544_rpi.c, then recompile the source code and check the final result as well as corresponding changes!  
nano pcd8544_rpi.c

// lcd contrast 
//may be need modify to fit your screen!  normal: 30- 90 ,default is:45 !!!maybe modify this value!
int contrast = 45; 

//change this part. The default setting is 45. If it’s too dark, decrease a little bit, If it’s too light, increase a little bit. We recommend you decrease/increase by 5 points at a time.

//After modification, source code should be recompiled before running
cc -o cpushow pcd8544_rpi.c PCD8544.c  -L/usr/local/lib -lwiringPi
sudo ./cpushow

//////////////////////The End ///////////////////////