Add onewire

Makefile

@@ -100,6 +100,9 @@ test_spi_connected1_loopback: TESTS=-DTEST_SPI_CONNECTED1_LOOPBACK
 test_spi_connected2_masterpingpong: TESTS=-DTEST_SPI_CONNECTED2_MASTERPINGPONG
 test_spi_connected2_slavepingpong:  TESTS=-DTEST_SPI_CONNECTED2_SLAVEPINGPONG
 
+## OneWire tests targets
+test_onewire_sensor: TESTS=-DTEST_ONEWIRE_SENSOR
+
 # Arduino-cli commands
 
 # For WSL and Windows :

src/corelibs/onewire/test_onewire_sensor.cpp

@@ -0,0 +1,100 @@
+/* test_onewire_sensor.cpp
+ *
+ * This test verifies if the OneWire sensor (e.g. in this case: DS18B20) is responding and providing valid data.
+ * It includes tests for device presence, chip description, and data retrieval.
+ */
+
+// std includes
+#include <OneWire.h>
+#include "test_common_includes.h"
+
+// OneWire instance and variables
+static OneWire oneWire(5); // Pin 5 is used for the OneWire bus
+static uint8_t addr[8];
+static uint8_t data[12];
+
+// Test group definition
+TEST_GROUP(onewire_sensor);
+
+TEST_SETUP(onewire_sensor) {
+    // Reset the OneWire bus
+    oneWire.reset_search();
+}
+
+TEST_TEAR_DOWN(onewire_sensor) {
+    // Cleanup if necessary
+}
+
+// Test case: Verify if a device is present on the OneWire bus
+TEST(onewire_sensor, test_device_presence) {
+    bool deviceFound = oneWire.search(addr);
+
+    // Print result and pass/fail message
+    if (deviceFound) {
+        Serial.println(" - Device Found");
+    } else {
+        TEST_FAIL_MESSAGE(" - No device found on the OneWire bus.");
+    }
+
+    // Verify the CRC of the device address
+    TEST_ASSERT_TRUE_MESSAGE(OneWire::crc8(addr, 7) == addr[7], " - Invalid CRC for device address");
+}
+
+// Test case: Verify if a chip description is returned
+TEST(onewire_sensor, test_device_description) {
+    bool deviceFound = oneWire.search(addr);
+    TEST_ASSERT_TRUE_MESSAGE(deviceFound, " - No device found on the OneWire bus");
+
+    // Check if the first byte of the address corresponds to a known chip family
+    if (addr[0] == 0x10 || addr[0] == 0x28 || addr[0] == 0x22) {
+        Serial.println(" - Chip description found.");
+    } else {
+        TEST_FAIL_MESSAGE(" - No valid chip description found.");
+    }
+}
+
+// Test case: Verify if data was returned (basic functionality)
+TEST(onewire_sensor, test_data_returned) {
+    bool deviceFound = oneWire.search(addr);
+    TEST_ASSERT_TRUE_MESSAGE(deviceFound, " - No device found on the OneWire bus");
+
+    // Start temperature conversion
+    oneWire.reset();
+    oneWire.select(addr);
+    oneWire.write(0x44, 1); // Start conversion with parasite power on
+
+    // Wait for conversion to complete
+    delay(1000);
+
+    // Read the scratchpad
+    oneWire.reset();
+    oneWire.select(addr);
+    oneWire.write(0xBE); // Read Scratchpad
+
+    for (uint8_t i = 0; i < 9; i++) {
+        data[i] = oneWire.read();
+    }
+
+    // Verify that data was returned (non-zero values in the scratchpad)
+    bool dataReturned = false;
+    for (uint8_t i = 0; i < 9; i++) {
+        if (data[i] != 0) {
+            dataReturned = true;
+            break;
+        }
+    }
+
+    // Print result and pass/fail message
+    if (dataReturned) {
+        Serial.println(" - Data received");
+    } else {
+        TEST_FAIL_MESSAGE(" - No valid data returned from the sensor.");
+    }
+}
+
+// Define test runner for the OneWire sensor test group
+TEST_GROUP_RUNNER(onewire_sensor) {
+    RUN_TEST_CASE(onewire_sensor, test_device_presence);
+    RUN_TEST_CASE(onewire_sensor, test_device_description);
+    RUN_TEST_CASE(onewire_sensor, test_data_returned);
+}

src/test_main.ino

@@ -165,6 +165,12 @@ void RunAllTests(void)
 
 #endif
 
+#ifdef TEST_ONEWIRE_SENSOR
+
+    RUN_TEST_GROUP(onewire_sensor);
+
+#endif
+
 }