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soc/cores/video: Improve/Cleanup VideoFrameBuffer, disable by default and modify default hres/vres to 800/600.

This commit is contained in:
Florent Kermarrec 2021-03-04 11:59:44 +01:00
parent 0ee92448b9
commit f553b5fc83
1 changed files with 12 additions and 13 deletions
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25
litex/soc/cores/video.py
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@ -184,7 +184,10 @@ class VideoTimingGenerator(Module, AutoCSR):
# Generate timings.
hactive = Signal()
vactive = Signal()
self.submodules.fsm = fsm = FSM(reset_state="IDLE")
fsm = FSM(reset_state="IDLE")
fsm = ResetInserter()(fsm)
self.submodules.fsm = fsm
self.comb += fsm.reset.eq(~enable)
fsm.act("IDLE",
NextValue(hactive, 0),
NextValue(vactive, 0),
@ -192,9 +195,7 @@ class VideoTimingGenerator(Module, AutoCSR):
NextValue(source.vres, vres),
NextValue(source.hcount, 0),
NextValue(source.vcount, 0),
If(enable,
NextState("RUN")
)
NextState("RUN")
)
self.comb += source.de.eq(hactive & vactive) # DE when both HActive and VActive.
self.sync += source.first.eq((source.hcount == 0) & (source.vcount == 0)),
@ -390,7 +391,7 @@ class CSIInterpreter(Module):
)
class VideoTerminal(Module):
def __init__(self, hres=640, vres=480, with_csi_interpreter=True):
def __init__(self, hres=800, vres=600, with_csi_interpreter=True):
self.enable = Signal(reset=1)
self.vtg_sink = vtg_sink = stream.Endpoint(video_timing_layout)
self.uart_sink = uart_sink = stream.Endpoint([("data", 8)])
@ -555,7 +556,7 @@ class VideoTerminal(Module):
class VideoFrameBuffer(Module, AutoCSR):
"""Video FrameBuffer"""
def __init__(self, dram_port, hres=640, vres=480, base=0x00000000, clock_domain="sys"):
def __init__(self, dram_port, hres=800, vres=600, base=0x00000000, clock_domain="sys"):
self.vtg_sink = vtg_sink = stream.Endpoint(video_timing_layout)
self.source = source = stream.Endpoint(video_data_layout)
@ -567,7 +568,7 @@ class VideoFrameBuffer(Module, AutoCSR):
self.dma.add_csr(
default_base = base,
default_length = hres*vres*32//8, # 32-bit RGB-444
default_start = 1,
default_enable = 0,
default_loop = 1
)
@ -585,13 +586,11 @@ class VideoFrameBuffer(Module, AutoCSR):
self.comb += [
vtg_sink.ready.eq(1),
If(vtg_sink.valid & vtg_sink.de,
source.valid.eq(self.cdc.source.valid),
vtg_sink.ready.eq(source.ready),
self.cdc.source.ready.eq(source.ready)
self.cdc.source.connect(source, keep={"valid", "ready"}),
vtg_sink.ready.eq(source.valid & source.ready),
),
source.de.eq(vtg_sink.de),
source.hsync.eq(vtg_sink.hsync),
source.vsync.eq(vtg_sink.vsync),
vtg_sink.connect(source, keep={"de", "hsync", "vsync"}),
source.r.eq(self.cdc.source.data[ 0: 8]),
source.g.eq(self.cdc.source.data[ 8:16]),
source.b.eq(self.cdc.source.data[16:24]),