First... sorry for my english...
I'm pretty new to Arduino, and i want to print what i want in the screen...
I am using Arduino mega, full graphic smart controller
, and ramps 1.4; i found this code "hello world" with u8glib but it isn't work -> "avrdude: stk500v2_ReceiveMessage(): timeout" :
#include "U8glib.h"
U8GLIB_ST7920_128X64_4X u8g(23, 17, 16); // SPI Com: SCK = en = 18, MOSI = rw = 16, CS = di = 17
void draw(void) {
// graphic commands to redraw the complete screen should be placed here
u8g.setFont(u8g_font_unifont);
//u8g.setFont(u8g_font_osb21);
u8g.drawStr( 0, 22, "Hello World!");
}
void setup(void) {
// flip screen, if required
// u8g.setRot180();
// set SPI backup if required
//u8g.setHardwareBackup(u8g_backup_avr_spi);
// assign default color value
if ( u8g.getMode() == U8G_MODE_R3G3B2 ) {
u8g.setColorIndex(255); // white
}
else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) {
u8g.setColorIndex(3); // max intensity
}
else if ( u8g.getMode() == U8G_MODE_BW ) {
u8g.setColorIndex(1); // pixel on
}
else if ( u8g.getMode() == U8G_MODE_HICOLOR ) {
u8g.setHiColorByRGB(255,255,255);
}
}
void loop(void) {
// picture loop
u8g.firstPage();
do {
draw();
} while( u8g.nextPage() );
// rebuild the picture after some delay
delay(50);
}
someone can see the problem?