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dvisampler/dma: bugfixes

This commit is contained in:
Sebastien Bourdeauducq 2013-05-08 22:50:40 +02:00
parent 66b4bae7c8
commit d685ed21fc
1 changed files with 4 additions and 5 deletions
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9
milkymist/dvisampler/dma.py
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@ -107,7 +107,8 @@ class DMA(Module):
pack_counter = Signal(max=pack_factor)
self.comb += last_pixel.eq(pack_counter == (pack_factor - 1))
self.sync += If(write_pixel,
[If(pack_counter == i, cur_memory_word[32*i:32*(i+1)].eq(encoded_pixel)) for i in range(pack_factor)],
[If(pack_counter == (pack_factor-i-1),
cur_memory_word[32*i:32*(i+1)].eq(encoded_pixel)) for i in range(pack_factor)],
pack_counter.eq(pack_counter + 1)
)
@ -123,11 +124,9 @@ class DMA(Module):
self.submodules += fsm
fsm.act(fsm.WAIT_SOF,
self.frame.ack.eq(~sof),
reset_words.eq(1),
If(self._slot_array.address_valid,
If(self.frame.stb & sof, fsm.next_state(fsm.TRANSFER_PIXEL))
)
self.frame.ack.eq(~self._slot_array.address_valid | ~sof),
If(self._slot_array.address_valid & sof & self.frame.stb, fsm.next_state(fsm.TRANSFER_PIXEL))
)
fsm.act(fsm.TRANSFER_PIXEL,
self.frame.ack.eq(1),