If/Else statements with u8g2.print

[Yedwa]

Hi Olivier

I am trouble printing on Nokia 5110 with u8g2.print function when used inside If/Else statement. May you be so kind to share an example of how this can be done successfully. Thank you for your assistance. Regards, Yedwa

[olikraus]

Please attach you "none"-working code.

[Yedwa]

The code was first written by Joop Brokking (http://www.brokking.net/imu.html) using liquid-crystal display.

void write_LCD(){

if(lcd_loop_counter == 14)lcd_loop_counter = 0;
lcd_loop_counter ++;
if(lcd_loop_counter == 1){ angle_pitch_buffer = angle_pitch_output * 10;
u8g2.setCursor(25, 28);
} if(lcd_loop_counter == 2){ if(angle_pitch_buffer < 0) u8g2.print("-");
}else u8g2.print("+");

if(lcd_loop_counter == 3)u8g2.print(abs(angle_pitch_buffer)/1000);
if(lcd_loop_counter == 4)u8g2.print((abs(angle_pitch_buffer)/100)%10); if(lcd_loop_counter == 5)u8g2.print((abs(angle_pitch_buffer)/10)%10); if(lcd_loop_counter == 6)u8g2.print(".");
if(lcd_loop_counter == 7)u8g2.print(abs(angle_pitch_buffer)%10);

if(lcd_loop_counter == 8){ angle_roll_buffer = angle_roll_output * 10; u8g2.setCursor(25,38); } if(lcd_loop_counter == 9){ if(angle_roll_buffer < 0)u8g2.print("-");
else u8g2.print("+");
} if(lcd_loop_counter == 10)u8g2.print(abs(angle_roll_buffer)/1000);
if(lcd_loop_counter == 11)u8g2.print((abs(angle_roll_buffer)/100)%10) if(lcd_loop_counter == 12)u8g2.print((abs(angle_roll_buffer)/10)%10); if(lcd_loop_counter == 13)u8g2.print(".");
if(lcd_loop_counter == 14)u8g2.print(abs(angle_roll_buffer)%10); }

[olikraus]

I do not see an issue here. Which constructor do you use?

[Yedwa]

U8G2_PCD8544_84X48_F_4W_HW_SPI u8g2(U8G2_R2, / cs=/ 10, / dc=/ 9, / reset=/ 8); // Nokia 5110 Display

In the code when I did not include u8g2.clearBuffer(); or u8g2.sendBuffer(); the lcd remain blank, however when I included u8g2.sendBuffer(); as shown below, the lcd updated partially.

if(lcd_loop_counter == 14)lcd_loop_counter = 0;
lcd_loop_counter ++;
if(lcd_loop_counter == 1){ angle_pitch_buffer = angle_pitch_output * 10;
u8g2.setCursor(25, 28); u8g2.sendBuffer();

I am thinking my problem has to do with clearbuffer or sendbuffer which is missing in each loop counter.

[olikraus]

:+1: