81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
#include <gtest/gtest.h>
|
|
#include <time.h>
|
|
#include <wiringPi.h>
|
|
|
|
#define TRIGGER_PIN 0 // BCM 17
|
|
#define LISTENER_PIN 1 // BCM 18
|
|
#define ANOTHER_LISTENER_PIN 26 // BCM 12
|
|
|
|
/**
|
|
* Tests ISR for rising edges.
|
|
*/
|
|
class ISRRising : public ::testing::Test {
|
|
public:
|
|
static void SetUpTestSuite() {
|
|
wiringPiSetup();
|
|
pinMode(TRIGGER_PIN, OUTPUT);
|
|
digitalWrite(TRIGGER_PIN, LOW);
|
|
wiringPiISR(LISTENER_PIN, INT_EDGE_RISING, ISRRising::TriggerCount);
|
|
delay(100);
|
|
}
|
|
|
|
static uint32_t count;
|
|
|
|
static void TriggerCount() { ++count; }
|
|
|
|
static void TriggerCountDown() { --count; }
|
|
|
|
protected:
|
|
virtual void SetUp() { count = 0; }
|
|
|
|
virtual void TearDown() {
|
|
digitalWrite(TRIGGER_PIN, LOW);
|
|
delay(10);
|
|
}
|
|
};
|
|
|
|
uint32_t ISRRising::count = 0;
|
|
|
|
TEST_F(ISRRising, Fundamental) {
|
|
EXPECT_EQ(count, 0u);
|
|
digitalWrite(TRIGGER_PIN, HIGH);
|
|
delay(10);
|
|
EXPECT_EQ(count, 1u);
|
|
digitalWrite(TRIGGER_PIN, LOW);
|
|
delay(10);
|
|
EXPECT_EQ(count, 1u);
|
|
}
|
|
|
|
TEST_F(ISRRising, ThreeTriggers) {
|
|
digitalWrite(TRIGGER_PIN, HIGH);
|
|
delay(10);
|
|
count = 0;
|
|
for (int i = 0; i < 6; ++i) {
|
|
delay(10);
|
|
digitalWrite(TRIGGER_PIN, i % 2);
|
|
}
|
|
delay(10);
|
|
EXPECT_EQ(count, 3u);
|
|
}
|
|
|
|
TEST_F(ISRRising, ISRInitConflict) {
|
|
// this initialization should fail for ISR conflict
|
|
EXPECT_EQ(
|
|
wiringPiISR(LISTENER_PIN, INT_EDGE_FALLING, ISRRising::TriggerCountDown),
|
|
-1);
|
|
// ensure the initialization above has released the mutex lock
|
|
EXPECT_EQ(wiringPiISR(ANOTHER_LISTENER_PIN, INT_EDGE_RISING,
|
|
ISRRising::TriggerCountDown),
|
|
0);
|
|
delay(100);
|
|
|
|
// ensure the existing ISR has not broken
|
|
EXPECT_EQ(count, 0u);
|
|
digitalWrite(TRIGGER_PIN, HIGH);
|
|
delay(10);
|
|
EXPECT_EQ(count, 1u);
|
|
digitalWrite(TRIGGER_PIN, LOW);
|
|
delay(10);
|
|
EXPECT_EQ(count, 1u);
|
|
}
|