81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
#include <gtest/gtest.h>
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#include <time.h>
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#include <wiringPi.h>
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#define TRIGGER_PIN 26 // BCM 12
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#define LISTENER_PIN 31 // BCM 1
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#define ANOTHER_LISTENER_PIN 28 // BCM 20
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/**
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* Tests ISR for rising edges.
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*/
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class ISRRising : public ::testing::Test {
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public:
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static void SetUpTestSuite() {
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wiringPiSetup();
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pinMode(TRIGGER_PIN, OUTPUT);
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digitalWrite(TRIGGER_PIN, LOW);
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wiringPiISR(LISTENER_PIN, INT_EDGE_RISING, ISRRising::TriggerCount);
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delay(100);
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}
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static uint32_t count;
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static void TriggerCount() { ++count; }
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static void TriggerCountDown() { --count; }
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protected:
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virtual void SetUp() { count = 0; }
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virtual void TearDown() {
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digitalWrite(TRIGGER_PIN, LOW);
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delay(10);
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}
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};
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uint32_t ISRRising::count = 0;
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TEST_F(ISRRising, Fundamental) {
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EXPECT_EQ(count, 0u);
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digitalWrite(TRIGGER_PIN, HIGH);
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delay(10);
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EXPECT_EQ(count, 1u);
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digitalWrite(TRIGGER_PIN, LOW);
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delay(10);
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EXPECT_EQ(count, 1u);
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}
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TEST_F(ISRRising, ThreeTriggers) {
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digitalWrite(TRIGGER_PIN, HIGH);
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delay(10);
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count = 0;
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for (int i = 0; i < 6; ++i) {
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delay(10);
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digitalWrite(TRIGGER_PIN, i % 2);
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}
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delay(10);
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EXPECT_EQ(count, 3u);
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}
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TEST_F(ISRRising, ISRInitConflict) {
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// this initialization should fail for ISR conflict
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EXPECT_EQ(
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wiringPiISR(LISTENER_PIN, INT_EDGE_FALLING, ISRRising::TriggerCountDown),
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-1);
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// ensure the initialization above has released the mutex lock
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EXPECT_EQ(wiringPiISR(ANOTHER_LISTENER_PIN, INT_EDGE_RISING,
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ISRRising::TriggerCountDown),
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0);
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delay(100);
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// ensure the existing ISR has not broken
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EXPECT_EQ(count, 0u);
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digitalWrite(TRIGGER_PIN, HIGH);
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delay(10);
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EXPECT_EQ(count, 1u);
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digitalWrite(TRIGGER_PIN, LOW);
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delay(10);
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EXPECT_EQ(count, 1u);
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}
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