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framebuffer: fix sync generation

This commit is contained in:
Sebastien Bourdeauducq 2012-07-01 18:43:39 +02:00
parent 6776e2275c
commit 0a29b74cce
1 changed files with 4 additions and 6 deletions
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10
milkymist/framebuffer/__init__.py
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@ -109,8 +109,6 @@ class VTG(Actor):
generate_en = Signal()
hcounter = Signal(BV(_hbits))
vcounter = Signal(BV(_vbits))
hsync = Signal()
vsync = Signal()
comb = [
active.eq(hactive & vactive),
@ -133,8 +131,8 @@ class VTG(Actor):
If(hcounter == 0, hactive.eq(1)),
If(hcounter == tp.hres, hactive.eq(0)),
If(hcounter == tp.hsync_start, hsync.eq(1)),
If(hcounter == tp.hsync_end, hsync.eq(0)),
If(hcounter == tp.hsync_start, self.token("dac").hsync.eq(1)),
If(hcounter == tp.hsync_end, self.token("dac").hsync.eq(0)),
If(hcounter == tp.hscan,
hcounter.eq(0),
If(vcounter == tp.vscan,
@ -146,9 +144,9 @@ class VTG(Actor):
If(vcounter == 0, vactive.eq(1)),
If(vcounter == tp.vres, vactive.eq(0)),
If(vcounter == tp.vsync_start, vsync.eq(1)),
If(vcounter == tp.vsync_start, self.token("dac").vsync.eq(1)),
If(vcounter == tp.vsync_end,
vsync.eq(0),
self.token("dac").vsync.eq(0),
self.endpoints["timing"].ack.eq(1)
)
)