chumbyhackerboard:vga
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
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chumbyhackerboard:vga [2010/09/21 05:18] ladyada |
chumbyhackerboard:vga [2016/01/28 18:05] (current) |
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| Line 32: | Line 32: | ||
| * back porch: 31 horizontal lines | * back porch: 31 horizontal lines | ||
| - | so HW_LCDIF_VDCTRL1 = 542 (0x21e) | + | so HW_LCDIF_VDCTRL1 = 524 (0x20C) |
| ====== HW_LCDIF_VDCTRL0 ====== | ====== HW_LCDIF_VDCTRL0 ====== | ||
| Line 60: | Line 60: | ||
| -> 0x00340002 | -> 0x00340002 | ||
| + | |||
| + | ====== HW_LCDIF_VDCTRL3 ====== | ||
| + | by default = 0x004b0027 | ||
| + | |||
| + | * MUX_SYNC_SIGNALS = 0 | ||
| + | * VSYNC_ONLY = 1 (?) | ||
| + | * HORIZONTAL_WAIT_CNT = 48 (h back porch) + 96 (sync pulse) = 0xDE and then | ||
| + | * VERTICAL_WAIT_CNT = 31 (v back porch) + 2 (sync pulse) = 0x21 | ||
| + | |||
| + | -> 0x00DE0021 | ||
| ====== HW_LCDIF_TRANSFER_COUNT ====== | ====== HW_LCDIF_TRANSFER_COUNT ====== | ||
| Line 81: | Line 91: | ||
| HSync = 31.3Khz (should be 31.46) | HSync = 31.3Khz (should be 31.46) | ||
| - | Vsync = 58 Hz (should be 60.04) | + | Vsync = 59.75 Hz (should be 60.04) |
| Vsync negative pulse = 63.9 uS (should be 63.57) (it is low from the negative edge of one HSync to another negative Hsync edge) | Vsync negative pulse = 63.9 uS (should be 63.57) (it is low from the negative edge of one HSync to another negative Hsync edge) | ||
| Hsync negative pulse = 3.83 uS (should be 3.81) | Hsync negative pulse = 3.83 uS (should be 3.81) | ||
| + | |||
| + | HSync Back porch = 5 uS (should be 1.9?), Hsync front porch = ~14.2uS (should be 0.9?) | ||
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