<![CDATA[Drawing random PNG images from SD problem]]>How do i get this code to work
this works :
M5.Lcd.drawPngFile(SD,"/Image8.PNG", 0, 0); // display splash screen
but
M5.Lcd.drawPngFile(SD,PngName, 0, 0); // display splash screen
does not in code below.
I want to generate a random slide show

   int Arand=random(11);
  String PngName="/Image"+ String (Arand)+".PNG";
  Serial.println (PngName);
   M5.Lcd.drawPngFile(SD,(PngName), 0, 0); // display splash screen
]]>https://community.m5stack.com/topic/2772/drawing-random-png-images-from-sd-problemRSS for NodeThu, 30 Apr 2026 03:11:17 GMTMon, 18 Jan 2021 13:32:22 GMT60<![CDATA[Reply to Drawing random PNG images from SD problem on Mon, 18 Jan 2021 17:43:57 GMT]]>Hello @AndyT

you are welcome. Glad to hear it works now.

Cheers
Felix

]]>https://community.m5stack.com/post/11851https://community.m5stack.com/post/11851Mon, 18 Jan 2021 17:43:57 GMT<![CDATA[Reply to Drawing random PNG images from SD problem on Mon, 18 Jan 2021 17:40:16 GMT]]>Cheers Felix,
No it did not compile without errors before. But adding .c.str() solved it .
Thank you again

]]>https://community.m5stack.com/post/11850https://community.m5stack.com/post/11850Mon, 18 Jan 2021 17:40:16 GMT<![CDATA[Reply to Drawing random PNG images from SD problem on Mon, 18 Jan 2021 13:45:40 GMT]]>Hi @AndyT

AFAIK drawPngFile() expects a pointer to a character array as path name and not a String. Just curious, does your code compile w/o error?

I think something like this should work:

M5.Lcd.drawPngFile(SD, PngName.c_str(), 0, 0);

Thanks
Felix

]]>https://community.m5stack.com/post/11829https://community.m5stack.com/post/11829Mon, 18 Jan 2021 13:45:40 GMT