Hi,
I would like to ask a question on AM1808 LCD output.
If the application requires outputting video input from camera to TFT LCD screen via AM1808, what is the solution?
After reading the datasheet carefully, I found that the video output ability of AM1808 is rather limited. To bridge input with output, the same format sets should be supported both at the front and the end side, like in DM6437. However, unlike digital media processor DM6437 whose VPSS is capable of doing conversion between various formats, including (YUV, RGB) pair, I found no hardware video format conversion ability in AM1808:
|
|
VPIF |
LCDC TFT mode (BPP=12 or 16, not using pallette) |
|
YUV |
✓ |
✕ |
|
RGB |
BPP 8, 10, 12 |
12(supported?) or 16 |
The only intersection between {VPIF format} and {LCDC format} is 12-bit RGB; however, as asked in Does AM1808 LCDC support 12-bit TFT mode?, the description on TFT output modes was not particularly clear regarding 12-bit mode.
Is my understanding on VPIF and LCDC correct? If 12-bit TFT mode is supported, is it the only way to output camera video input on LCD? If 12-bit TFT mode is not supported, does it mean via TFT LCD there is no way to display camera video input?
Zheng
