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lss: Clean up I2C testbenches

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2025-03-19 14:52:26 -07:00
parent 79e0bf6976
commit b8021192e3
2 changed files with 102 additions and 27 deletions
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59
tb/lss/taxi_i2c_single_reg/test_taxi_i2c_single_reg.py
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@@ -49,27 +49,47 @@ class TB:
await RisingEdge(self.dut.clk)
async def run_test(dut, payload_lengths=None, payload_data=None):
async def run_test_write(dut):
tb = TB(dut)
await tb.reset()
tb.log.info("Test write")
await tb.i2c_master.write(0x70, b'\x11\xAA')
await tb.i2c_master.send_stop()
assert dut.data_out.value.integer == 0xAA
tb.log.info("Test zero-length write")
await RisingEdge(dut.clk)
await RisingEdge(dut.clk)
async def run_test_null_write(dut):
tb = TB(dut)
await tb.reset()
await RisingEdge(dut.clk)
dut.data_in.value = 0xAA
dut.data_latch.value = 1
await RisingEdge(dut.clk)
dut.data_latch.value = 0
await tb.i2c_master.write(0x70, b'')
await tb.i2c_master.send_stop()
assert dut.data_out.value.integer == 0xAA
tb.log.info("Test read")
await RisingEdge(dut.clk)
await RisingEdge(dut.clk)
async def run_test_read(dut):
tb = TB(dut)
await tb.reset()
await RisingEdge(dut.clk)
dut.data_in.value = 0x55
@@ -84,11 +104,27 @@ async def run_test(dut, payload_lengths=None, payload_data=None):
assert data == b'\x55'*4
tb.log.info("Test write to nonexistent device")
await RisingEdge(dut.clk)
await RisingEdge(dut.clk)
async def run_test_nack(dut):
tb = TB(dut)
await tb.reset()
await RisingEdge(dut.clk)
dut.data_in.value = 0xAA
dut.data_latch.value = 1
await RisingEdge(dut.clk)
dut.data_latch.value = 0
await tb.i2c_master.write(0x55, b'\x00\x04'+b'\xde\xad\xbe\xef')
await tb.i2c_master.send_stop()
assert dut.data_out.value.integer == 0xAA
# assert missed ack
await RisingEdge(dut.clk)
@@ -97,8 +133,15 @@ async def run_test(dut, payload_lengths=None, payload_data=None):
if cocotb.SIM_NAME:
factory = TestFactory(run_test)
factory.generate_tests()
for test in [
run_test_write,
run_test_null_write,
run_test_read,
run_test_nack,
]:
factory = TestFactory(test)
factory.generate_tests()
# cocotb-test