add repeating interrupts with tests

src/test.py

@@ -40,10 +40,49 @@ async def test_one_shot(dut):
     await ClockCycles(dut.clk, 2)
 
     dut.uio_in.value = 0xA0  # set we high and config_address to 0b10
-    dut.ui_in.value = 0x10
+    dut.ui_in.value = 0x0A
     await ClockCycles(dut.clk, 10)
     dut.uio_in.value = 0x0  # unset we so we no longer configure registers.
     await ClockCycles(dut.clk, 10)
 
     dut._log.info("checking that interrupt is high")
     assert dut.uo_out.value == 0b01000000
+
+
+@cocotb.test()
+async def repeating_no_divider(dut):
+
+    dut._log.info("start")
+    clock = Clock(dut.clk, 10, units="us")
+    cocotb.start_soon(clock.start())
+
+    # reset
+    dut._log.info("reset")
+    dut.rst_n.value = 0
+    await ClockCycles(dut.clk, 2)
+
+    dut.rst_n.value = 1
+    # set WE high, config_address to 0b00
+    dut.uio_in.value = 0b1000_0000
+    # divider off, repeat on.
+    dut.ui_in.value = 0b0100_0000
+    # TODO: set repeating on in the payload
+    await ClockCycles(dut.clk, 1)
+    dut.uio_in.value = 0x01
+    dut.ui_in.value = 0x00
+    # set WE high and config_address to 0b01
+    dut.uio_in.value = 0xC0
+    dut.ui_in.value = 0x00  # should not set temp_counter
+    await ClockCycles(dut.clk, 2)
+
+    dut.uio_in.value = 0xA0  # set we high and config_address to 0b10
+    dut.ui_in.value = 0x0A
+    await ClockCycles(dut.clk, 10)
+    dut._log.info("checking that interrupt is high")
+    assert dut.uo_out.value == 0b01000000
+
+    dut.uio_in.value = 0x0  # unset we so we no longer configure registers.
+    await ClockCycles(dut.clk, 10)
+    dut._log.info("checking that interrupt is high")
+    assert dut.uo_out.value == 0b01000000
+    await ClockCycles(dut.clk, 10)

src/tt_um_minipit_stevej.v

@@ -92,6 +92,9 @@ module tt_um_minipit_stevej (
             if (counter_set && (current_count == counter)) begin
                 // pull interrupt line high for one clock cycle
                 interrupting <= 1;
+                if (repeating) begin
+                    current_count <= 0;
+                end
             end else begin
                 interrupting <= 0;
             end