> there'is missing some infos. E.g:how fill values for : pixel > clock, horizontal synchronization pulse width, horizontal > front porch, horizontal back porch, vertical synchronization > pulse width, vertical front porch, vertical back porch, > ac-bias pin frequency.
Does your linux kernel already boot? If yes, you can use a user-space tool to change those settings on the fly until the displayed image is what you need. I once write a tool "pxaregs" for an PXA255 that could do this, you need to adapt this to your omap. http://www.mn-logistik.de/unsupported/pxa250/pxaregs.c In my experiments, the LCD was very forgiving for wrong timings, e.g. with a different timing when specified I still got a picture. If the timing was too slow, the picture flickered, especially if your room is lit with neon bulbs. If the timing was too high, then the PDA got a bit slower, because the PXA255 used more bus bandwidth for video refresh. The pulse width was also not that important, but pulse polarities of course mattered. I cannot guarantee that you won't damage your LCD display, but I didn't damage mine :-) For my current target, I'm using something like this to get all LCD controller settings and will re-use this on windows: print "LCDC:" print "mem32 10021000: %08x LSSAR" pmw(0x10021000) print "mem32 10021004: %08x LSR" pmw(0x10021004) print "mem32 10021008: %08x LVPWR" pmw(0x10021008) print "mem32 1002100c: %08x LCPR" pmw(0x1002100c) print "mem32 10021010: %08x LCWHBR" pmw(0x10021010) print "mem32 10021014: %08x LCCMR" pmw(0x10021014) print "mem32 10021018: %08x LPCR" pmw(0x10021018) print "mem32 1002101c: %08x LHCR" pmw(0x1002101c) print "mem32 10021020: %08x LVCR" pmw(0x10021020) print "mem32 10021024: %08x LPOR" pmw(0x10021024) print "mem32 10021028: %08x LSCR" pmw(0x10021028) print "mem32 1002102c: %08x LPCCR" pmw(0x1002102c) print "mem32 10021030: %08x LDCR" pmw(0x10021030) print "mem32 10021034: %08x LRMCR" pmw(0x10021034) print "mem32 10021038: %08x LICR" pmw(0x10021038) print "mem32 1002103c: %08x LIER" pmw(0x1002103c) print "mem32 10021040: %08x LISR" pmw(0x10021040) print "mem32 10021050: %08x LGWSAR" pmw(0x10021050) print "mem32 10021054: %08x LGWSR" pmw(0x10021054) print "mem32 10021058: %08x LGWVPWR" pmw(0x10021058) print "mem32 1002105c: %08x LGWPOR" pmw(0x1002105c) print "mem32 10021060: %08x LGWPR" pmw(0x10021060) print "mem32 10021064: %08x LGWCR" pmw(0x10021064) print "mem32 10021068: %08x LGWDCR" pmw(0x10021068) (But the above is correct only for an i.MX21 processor). I'm capturing the output via haretconsole and have a pythonscript that can decode this. In the end I get output like this: Chapter 26: LCD Controller (LCDC) Address Value Register Page Description Bits Value Bit name Description -------------------------------------------------------------------------- 10021000 c0101000 LSSAR 643 Screen Start Address Register 10021004 00f00140 LSR 644 Size Register 0-9 140 YMAX (320) 20-25 f XMAX/16 (15) 10021008 00000078 LVPWR ? Virtual Page Width Register 0-9 78 VPW Virtual Page Width (120) 1002100c 00000000 LCPR 651 Cursor Position Register 0-9 0 CYP X position 16-25 0 CXP Y position 28 0 OP Arithmetic Operation Control 30-31 0 CC Cursor Control [unused] ... which is quite easy to understand :-) _______________________________________________ Haret mailing list [email protected] https://handhelds.org/mailman/listinfo/haret
