Adding nrf51 timer unit tests

machineware-gmbh · May 26, 2023 · fbdfd8e · fbdfd8e
1 parent 4a5b23f
commit fbdfd8e
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Showing 2 changed files with 82 additions and 5 deletions.
diff --git a/src/vcml/models/timers/nrf51.cpp b/src/vcml/models/timers/nrf51.cpp
@@ -127,6 +127,7 @@ void nrf51::write_clear(u32 val) {
     if (val == 1u) {
         count = 0;
         m_start = sc_time_stamp();
+        update();
     }
 }
 

diff --git a/test/models/timer_nrf51.cpp b/test/models/timer_nrf51.cpp
@@ -39,23 +39,99 @@ class nrf51_test : public test_base
         NRF51_MODE = 0x504,
         NRF51_BITMODE = 0x508,
         NRF51_PRESCALER = 0x510,
-        NRF51_CC = 0x540,
+        NRF51_CC0 = 0x540,
     };
 
+    constexpr u64 nrf51_capture(size_t i) { return NRF51_CAPTURE0 + i * 4; }
+    constexpr u64 nrf51_compare(size_t i) { return NRF51_COMPARE0 + i * 4; }
+    constexpr u64 nrf51_cc(size_t i) { return NRF51_CC0 + i * 4; }
+
     nrf51_test(const sc_module_name& nm):
         test_base(nm), nrf51("nrf51"), out("out"), irq("irq") {
         out.bind(nrf51.in);
         nrf51.irq.bind(irq);
         rst.bind(nrf51.rst);
-        clk.bind(nrf51.clk);
+        nrf51.clk.stub(16 * MHz);
         EXPECT_STREQ(nrf51.kind(), "vcml::timers::nrf51");
     }
 
     virtual void run_test() override {
-        // u32 data;
-
+        u32 data;
         wait(SC_ZERO_TIME);
-        EXPECT_FALSE(irq) << "irq did not reset";
+        ASSERT_FALSE(irq) << "irq did not reset";
+
+        // setup bitmode and prescaler
+        ASSERT_OK(out.writew<u32>(NRF51_BITMODE, 3));
+        ASSERT_OK(out.writew<u32>(NRF51_PRESCALER, 4)); // 16 MHz / 2^4
+
+        // start time and sample
+        ASSERT_OK(out.writew<u32>(NRF51_START, 1));
+        wait(1, SC_SEC);
+        ASSERT_OK(out.writew<u32>(NRF51_STOP, 1));
+        ASSERT_OK(out.writew<u32>(nrf51_capture(1), 1));
+        ASSERT_OK(out.readw<u32>(nrf51_cc(1), data));
+        ASSERT_EQ(data, 1000000);
+
+        // timer should not count while stopped
+        wait(10, SC_SEC);
+        ASSERT_OK(out.writew<u32>(nrf51_capture(2), 1));
+        ASSERT_OK(out.readw<u32>(nrf51_cc(2), data));
+        ASSERT_EQ(data, 1000000);
+
+        // clear timer
+        ASSERT_OK(out.writew<u32>(NRF51_CLEAR, 1));
+        ASSERT_OK(out.writew<u32>(nrf51_capture(3), 1));
+        ASSERT_OK(out.readw<u32>(nrf51_cc(3), data));
+        ASSERT_EQ(data, 0);
+        ASSERT_FALSE(irq);
+
+        // test interrupts
+        ASSERT_OK(out.writew<u32>(NRF51_INTENSET, bit(16)));
+        ASSERT_OK(out.writew<u32>(nrf51_cc(0), 2000000));
+        ASSERT_OK(out.writew<u32>(nrf51_compare(0), 0));
+        ASSERT_OK(out.writew<u32>(NRF51_START, 1));
+        ASSERT_FALSE(irq);
+        sc_time t = sc_time_stamp();
+        wait(irq.default_event());
+        ASSERT_TRUE(irq);
+        t = sc_time_stamp() - t;
+        ASSERT_EQ(t, sc_time(2.0, SC_SEC));
+        ASSERT_OK(out.readw<u32>(nrf51_compare(0), data));
+        ASSERT_EQ(data, 1);
+        ASSERT_OK(out.writew<u32>(nrf51_cc(0), 0));
+        ASSERT_OK(out.writew<u32>(nrf51_compare(0), 0));
+        ASSERT_FALSE(irq);
+        ASSERT_OK(out.writew<u32>(NRF51_START, 0));
+
+        // test counter mode
+        ASSERT_OK(out.writew<u32>(NRF51_MODE, 1));
+        ASSERT_OK(out.writew<u32>(NRF51_CLEAR, 1));
+        ASSERT_OK(out.writew<u32>(NRF51_START, 1));
+        for (size_t i = 0; i < 3; i++)
+            ASSERT_OK(out.writew<u32>(NRF51_COUNT, 1));
+        ASSERT_OK(out.writew<u32>(nrf51_capture(2), 1));
+        ASSERT_OK(out.readw<u32>(nrf51_cc(2), data));
+        ASSERT_EQ(data, 3);
+        ASSERT_OK(out.writew<u32>(nrf51_cc(0), 5));
+        ASSERT_OK(out.writew<u32>(nrf51_compare(0), 0));
+        ASSERT_FALSE(irq);
+        ASSERT_OK(out.writew<u32>(NRF51_COUNT, 1));
+        ASSERT_FALSE(irq);
+        ASSERT_OK(out.writew<u32>(NRF51_COUNT, 1));
+        ASSERT_TRUE(irq);
+        ASSERT_OK(out.writew<u32>(nrf51_cc(0), 0));
+        ASSERT_OK(out.writew<u32>(nrf51_compare(0), 0));
+        ASSERT_FALSE(irq);
+
+        // test counter mode stop
+        ASSERT_OK(out.writew<u32>(nrf51_capture(3), 1));
+        ASSERT_OK(out.readw<u32>(nrf51_cc(3), data));
+        ASSERT_EQ(data, 5);
+        ASSERT_OK(out.writew<u32>(NRF51_STOP, 1));
+        ASSERT_OK(out.writew<u32>(NRF51_COUNT, 1));
+        ASSERT_OK(out.writew<u32>(nrf51_capture(1), 1));
+        ASSERT_OK(out.readw<u32>(nrf51_cc(1), data));
+        ASSERT_EQ(data, 5);
     }
 };