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video: align hsync and vsync generated by the vtg

This commit is contained in:
Franck Jullien 2022-02-03 13:47:30 +01:00
parent 26c44af3f7
commit 25152fe4de
1 changed files with 13 additions and 11 deletions
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24
litex/soc/cores/video.py
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@ -242,21 +242,23 @@ class VideoTimingGenerator(Module, AutoCSR):
# Increment HCount. # Increment HCount.
NextValue(source.hcount, source.hcount + 1), NextValue(source.hcount, source.hcount + 1),
# Generate HActive / HSync. # Generate HActive / HSync.
If(source.hcount == 0, NextValue(hactive, 1)), # Start of HActive. If(source.hcount == 0, NextValue(hactive, 1)), # Start of HActive.
If(source.hcount == hres, NextValue(hactive, 0)), # End of HActive. If(source.hcount == hres, NextValue(hactive, 0)), # End of HActive.
If(source.hcount == hsync_start, NextValue(source.hsync, 1)), # Start of HSync. If(source.hcount == hsync_start,
If(source.hcount == hsync_end, NextValue(source.hsync, 0)), # End of HSync. NextValue(source.hsync, 1), # Start of HSync.
NextValue(source.vsync, 1), # Start of VSync.
NextValue(source.vcount, vsync_start)
),
If(source.hcount == hsync_end, NextValue(source.hsync, 0)), # End of HSync.
If(source.hcount == hscan, NextValue(source.hcount, 0)), # Reset HCount.
# End of HScan. # End of HScan.
If(source.hcount == hscan, If(source.hcount == hsync_start,
# Reset HCount.
NextValue(source.hcount, 0),
# Increment VCount. # Increment VCount.
NextValue(source.vcount, source.vcount + 1), NextValue(source.vcount, source.vcount + 1),
# Generate VActive / VSync. # Generate VActive / VSync.
If(source.vcount == 0, NextValue(vactive, 1)), # Start of VActive. If(source.vcount == 0, NextValue(vactive, 1)), # Start of VActive.
If(source.vcount == vres, NextValue(vactive, 0)), # End of HActive. If(source.vcount == vres, NextValue(vactive, 0)), # End of HActive.
If(source.vcount == vsync_start, NextValue(source.vsync, 1)), # Start of VSync. If(source.vcount == vsync_end, NextValue(source.vsync, 0)), # End of VSync.
If(source.vcount == vsync_end, NextValue(source.vsync, 0)), # End of VSync.
# End of VScan. # End of VScan.
If(source.vcount == vscan, If(source.vcount == vscan,
# Reset VCount. # Reset VCount.