LCD Smartie use u8glib library help !!

Other Hardware Displays
1

Hi all , I am new player , I read MilesBurton.com , want use ST7920 SPI LCD screen and arduino nano make like 4 row 20 line LCD . I use u8glib/example/Console , but not success ,it always scroll up when serial read . And LCD Smartie if use HD44780 LCD driver , serial will send 254,71,1,1 is row 1 ,254,71,1,2 is row 2,254,71,1,2 is row 3 ,254,71,1,4 is row 4 , 254,88 is clear screen, please teach me and help , thank you
sorry and forgive my poor english

2

Can you give a link to your display ?

3

128x64 Graphic LCD(ST7920 chip) 128x64 Graphic LCD - DFRobot
thank you

4

Stick to one library, and try to make that work.
For example the u8glib supports U8GLIB_ST7920_128X64_1X.
Can you make that work ?
You could use the graphics mode to write 4 lines of text.

It could be the way you have connected it. For example a ribbon cable would cause such problems.
Or the display might be broken.

Can you make a photo of the wiring ?

5

thank you your help ,
Yeah , the display is work now . Another question
void loop(){

byte rxbyte;
byte temp;
int row = 0;
rxbyte = serial_getch();

if (rxbyte == 254) //Matrix Orbital uses 254 prefix for commands
{
switch (serial_getch())
{
case 71: //set cursor position
row = (serial_getch() - 1); //get column byte
switch (serial_getch()) //get row byte
{
case 1:
row = 0;//row1
break;
case 2:
row = 1;//row2
break;
case 3:
row = 2;//row3
break;
case 4:
row = 3;//row4
break;
default:
break;
}
LCDA.setCursor(row,0);
break;
How can i use u8glib library to Set Cursor ?
thank you