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tb: phy_core: Make signal_status more robust 

signal_status and must be low for a rising edge before it goes high. At
the moment we depend on ClockEnable to wait for a rising edge. Instead,
wait for a falling edge explicitly. This makes this test less
dependent on how tx_ce is generated.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
This commit is contained in:
Sean Anderson 2023-03-05 00:13:13 -05:00
parent 19a588bd81
commit ec04874781
1 changed files with 2 additions and 2 deletions
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4
tb/phy_core.py
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@ -26,9 +26,9 @@ async def test_transfer(phy):
phy.link_monitor_test_mode.value = 1 phy.link_monitor_test_mode.value = 1
await cocotb.start(ClockEnable(phy.clk, phy.tx_ce, 5)) await cocotb.start(ClockEnable(phy.clk, phy.tx_ce, 5))
await Timer(1) await Timer(1)
phy.signal_status.value = 1
await cocotb.start(Clock(phy.clk, 8, units='ns').start()) await cocotb.start(Clock(phy.clk, 8, units='ns').start())
await FallingEdge(phy.tx_ce) await FallingEdge(phy.clk)
phy.signal_status.value = 1
tx_data = list(as_nibbles([0x55, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef])) tx_data = list(as_nibbles([0x55, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]))
rx_data = list(as_nibbles((0x55, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10))) rx_data = list(as_nibbles((0x55, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10)))