board707
commented
2 years ago Hi!
In the master branch of the library, it is impossible to display a marquee and a stationary line at the same time, because the marquee shifts the whole screen.
But in dev-V2 branch you can switch off screen shifting by setting
use_shift = false;
at DMD_STM32a.h (near 245 line)
hello, first of all thank you so much for writing such library for stm32. I am having issue with the code which is written to display steady message at 2nd row and scrolling message at 1st row at the same time. i tried this in two ways: 1 ) call draw string to display the string and then call the marquee. it shifts all the display including static message. `dmd.drawString(0,(DISPLAYS_DOWN - 2) 16,"SCROLLING",10,GRAPHICS_NORMAL,0); // at 2nd row dmd.drawMarquee("SCROLLING",10,(32DISPLAYS_ACROSS)-1,DISPLAYS_DOWN - 1)* 16); // at 1st row
long prev_step =millis(); boolean ret=false; while(!ret){ if ((millis() - prev_step) > 50 ) { ret=dmd.stepMarquee(-1,0); prev_step=millis(); } }`
2 ) call the marquee and then draw string to display the string . it shows static message on 2nd row while scrolling message at 1st row but the screen is flickering. i know the reason it is flickering due to marquee is shifting whole screen and i am forcing to display the static message. but i dont know how to solve. please help me. ` dmd.drawMarquee("SCROLLING",10,(32DISPLAYS_ACROSS)-1,DISPLAYS_DOWN - 1) 16); //at 1st row
long prev_step =millis(); boolean ret=false; while(!ret){ if ((millis() - prev_step) > 50 ) { ret=dmd.stepMarquee(-1,0); dmd.drawString(0,(DISPLAYS_DOWN - 2)* 16,"SCROLLING",10,GRAPHICS_NORMAL,0); //at 2nd row prev_step=millis(); } }`
video showing two rows but p10 display connected across for testing purpose only. first row message ABC second row message "1" static and other scrolling "SCROLLING"