Snapshot of JC3636W518EN kit before demo folder cleanup

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2-Program Example/Demo_Arduino/library/ESP32_IO_Expander/examples/TestFunctions/TestFunctions.ino

@@ -0,0 +1,72 @@
+#include <Arduino.h>
+#include <ESP_IOExpander_Library.h>
+
+#define EXAMPLE_I2C_NUM         (0)
+#define EXAMPLE_I2C_SDA_PIN     (8)
+#define EXAMPLE_I2C_SCL_PIN     (18)
+
+/**
+ * Create an ESP_IOExpander object, Currently supports:
+ *      - TCA95xx (8bit)
+ *      - TCA95xx (16bit)
+ *      - HT8574
+ */
+ESP_IOExpander *expander = new ESP_IOExpander_TCA95xx_8bit(EXAMPLE_I2C_NUM, ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_000, EXAMPLE_I2C_SCL_PIN, EXAMPLE_I2C_SDA_PIN);
+
+void setup()
+{
+    Serial.begin(115200);
+    Serial.println("Test begin");
+
+    expander->init();
+    expander->begin();
+
+    Serial.println("Original status:");
+    expander->printStatus();
+
+    expander->pinMode(0, OUTPUT);
+    expander->pinMode(1, OUTPUT);
+    expander->multiPinMode(IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3, OUTPUT);
+
+    Serial.println("Set pint 0-3 to output mode:");
+    expander->printStatus();
+
+    expander->digitalWrite(0, LOW);
+    expander->digitalWrite(1, LOW);
+    expander->multiDigitalWrite(IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3, LOW);
+
+    Serial.println("Set pint 0-3 to low level:");
+    expander->printStatus();
+
+    expander->pinMode(0, INPUT);
+    expander->pinMode(1, INPUT);
+    expander->multiPinMode(IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3, INPUT);
+
+    Serial.println("Set pint 0-3 to input mode:");
+    expander->printStatus();
+}
+
+int level[4] = {0, 0, 0, 0};
+uint32_t level_temp;
+String level_str;
+
+void loop()
+{
+    // Read pin 0-3 level
+    level[0] = expander->digitalRead(0);
+    level[1] = expander->digitalRead(1);
+    level_temp = expander->multiDigitalRead(IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3);
+    level[2] = level_temp & IO_EXPANDER_PIN_NUM_2 ? HIGH : LOW;
+    level[3] = level_temp & IO_EXPANDER_PIN_NUM_3 ? HIGH : LOW;
+
+    Serial.print("Pin level: ");
+    Serial.print(level[0]);
+    Serial.print(", ");
+    Serial.print(level[1]);
+    Serial.print(", ");
+    Serial.print(level[2]);
+    Serial.print(", ");
+    Serial.println(level[3]);
+
+    sleep(1);
+}