HDMI examples for Rev.B silicon?
Rayman
Posts: 15,802
The code in the documentation doesn't seem to be working for me...
Trying to figure out if problem is code or hardware....
Update: Seems this s32d850t monitor doesn't like 640x350 resolution, works on another monitor...
Trying to figure out if problem is code or hardware....
Update: Seems this s32d850t monitor doesn't like 640x350 resolution, works on another monitor...
Comments
'******************************************** '* VGA 640 x 480 x 16bpp 5:6:5 RGB - HDMI * '******************************************** CON hdmi_base = 48 'must be a multiple of 8 DAT org ' ' ' Setup ' hubset ##%1_000001_0000011000_1111_10_00 'config PLL, 20MHz/2*25*1 = 250MHz waitx ##20_000_000 / 200 'allow crystal+PLL 5ms to stabilize hubset ##%1_000001_0000011000_1111_10_11 'switch to PLL rdfast ##640*350*2/64,##$1000 'set rdfast to wrap on bitmap setxfrq ##$0CCCCCCC+1 'set streamer freq to 1/10th clk setcmod #$100 'enable HDMI mode drvl #7<<6 + hdmi_base 'enable HDMI pins wrpin ##%100100_00_00000_0,#7<<6 + hdmi_base 'set 1mA drive on HDMI pins ' ' ' Field loop ' field mov hsync0,sync_000 'vsync off mov hsync1,sync_001 callpa #90,#blank 'top blanks mov x,##350 'set visible lines line call #hsync 'do horizontal sync xcont m_rf,#1 'do visible line djnz x,#line 'another line? callpa #83,#blank 'bottom blanks mov hsync0,sync_222 'vsync on mov hsync1,sync_223 callpa #2,#blank 'vertical sync blanks jmp #field 'loop ' ' ' Subroutines ' blank call #hsync 'blank lines xcont m_vi,hsync0 _ret_ djnz pa,#blank hsync xcont m_bs,hsync0 'horizontal sync xzero m_sn,hsync1 _ret_ xcont m_bv,hsync0 ' ' ' Initialized data ' sync_000 long %1101010100_1101010100_1101010100_10 ' sync_001 long %1101010100_1101010100_0010101011_10 ' hsync sync_222 long %0101010100_0101010100_0101010100_10 'vsync sync_223 long %0101010100_0101010100_1010101011_10 'vsync + hsync m_bs long $70810000 + hdmi_base<<17 + 16 'before sync m_sn long $70810000 + hdmi_base<<17 + 96 'sync m_bv long $70810000 + hdmi_base<<17 + 48 'before visible m_vi long $70810000 + hdmi_base<<17 + 640 'visible m_rf long $B0850000 + hdmi_base<<17 + 640 'visible rfword rgb16 (5:6:5) ' ' ' Uninitialized data ' x res 1 hsync0 res 1 hsync1 res 1 ' ' ' Bitmap ' orgh $1000 - 70 'justify pixels at $1000 file "birds_16bpp.bmp" 'rayman's picture (640 x 350)Ha, I was just getting the link for you:
https://drive.google.com/file/d/1W4_O8garuXfxYGz80bLm81kBuby5WeI9/view?usp=sharing
Seems I get ~2V on VIO from HDMI data pins somehow...
That demo sets up 1mA drive mode on those eight I/O pins, so the voltage is going to be a function of the receiver's impedance.
Gives me same thing though...
I'll try on P0 when I find my Digital Video Expansion adapter...
My chip is a hair warm... Maybe it's overheating... Only thing I can think of that could cause this....
Okay. You are getting 2V on the VIO pin which is driving the HDMI pins. That VIO pin is driven by a 3.3V regulator, right? Seems there is some heavy load, maybe, dragging that 3.3V down?
BTW: Just tested on cheaper monitor and it works!
I have this recalcitrant 50 or 55" 4k TCL monitor from costco that often doesn't like the signals being fed to it. For some odd reason its the one I often try first, but it does no favors.
Then we have a cheap white dick smith monitor that just works (mostly)
Vertical placement is off, but at least shows image correctly...
That may give the lowest resolution they test monitors at ?
(yes, the pixels are very much not square)
(Although, actually, my PC boots at whatever the monitor's EDID claims to be the native resolution. (internally, it just scales whatever resolution the running software selects to that, until the OS loads the proper GPU driver))
I have the new screen. Using two different laptops windows 10 pro. On one the spiral works on the other no. I cannot get the birds to work. Period.
Please look at the threads. What is going on. Used Pnut v and earlier versions still no avail.