@PU5PSY, I'm glad you're taking the PIO/DMA route.
640x480 needed a 25MHz clock, and PicoMite does monochrome only on that resolution. There's only so much you can do per 5 clocks...
Also, the function generating the signal would need to be in SRAM. Unless Arduino puts functions in SRAM by default, your first code example will run into trouble sometime down the line. And you tried to do non-integer microsecond timing...
I want to clarify that my "up to the task" comment was not about generation of a test signal -- monitors will generally try to be robust and can deal with some degree of non-perfect VGA signal timing -- but it's whether one can get the chip to do all the work to generate a display signal with screen data.
But it looks like you are moving forward, so best wishes and good luck on your project!![:D]( "Very Happy")
640x480 needed a 25MHz clock, and PicoMite does monochrome only on that resolution. There's only so much you can do per 5 clocks...
Also, the function generating the signal would need to be in SRAM. Unless Arduino puts functions in SRAM by default, your first code example will run into trouble sometime down the line. And you tried to do non-integer microsecond timing...
I want to clarify that my "up to the task" comment was not about generation of a test signal -- monitors will generally try to be robust and can deal with some degree of non-perfect VGA signal timing -- but it's whether one can get the chip to do all the work to generate a display signal with screen data.
But it looks like you are moving forward, so best wishes and good luck on your project!
Statistics: Posted by katak255 — Fri Feb 14, 2025 1:34 am