tb: add block test: test_fb

1 files changed, 28 insertions, 0 deletions

diff --git a/tb/top/test_fb.py b/tb/top/test_fb.py
new file mode 100644
index 0000000..c7bbddf
--- /dev/null
+++ b/tb/top/test_fb.py
@@ -0,0 +1,28 @@
+import struct
+
+import cocotb
+from cocotb.clock import Clock
+from cocotb.triggers import Combine, ClockCycles, RisingEdge, Timer, with_timeout
+from cocotb_bus.drivers.avalon import AvalonMaster
+
+@cocotb.test()
+async def fp_mat_mul(dut):
+    await cocotb.start(Clock(dut.clk, 2).start())
+
+    dut.rst_n.value = 1
+    await Timer(1)
+    dut.rst_n.value = 0
+    await Timer(1)
+    dut.rst_n.value = 1
+
+    master = AvalonMaster(dut, 'cmd', dut.clk, case_insensitive=False)
+
+    for i in range(32):
+        await master.write(i, int.from_bytes(struct.pack('<e', i + 1), 'little'))
+
+    await ClockCycles(dut.clk, 50)
+    for i in range(4):
+        for j in range(4):
+            read, = struct.unpack('<e', (await master.read(i * 4 + j)).integer.to_bytes(2, 'little'))
+            expected = sum((1 + i * 4 + k) * (17 + k * 4 + j) for k in range(4))
+            assert read == expected, f'expected {expected} at ({i}, {j}), got {read}'