diff --git a/examples/example_callback.c b/examples/example_callback.c
new file mode 100644
index 0000000..ef05722
--- /dev/null
+++ b/examples/example_callback.c
@@ -0,0 +1,58 @@
+#include "multi_button.h"
+
+struct Button btn1;
+struct Button btn2;
+
+int read_button1_GPIO() 
+{
+	return HAL_GPIO_ReadPin(B1_GPIO_Port, B1_Pin);
+}
+
+int read_button2_GPIO() 
+{
+	return HAL_GPIO_ReadPin(B2_GPIO_Port, B2_Pin);
+}
+
+int main()
+{
+	button_init(&btn1, read_button1_GPIO, 0);
+	button_init(&btn2, read_button2_GPIO, 0);
+	
+	button_attach(&btn1, PRESS_DOWN,       BTN1_PRESS_DOWN_Handler);
+	button_attach(&btn1, PRESS_UP,         BTN1_PRESS_UP_Handler);
+	button_attach(&btn1, PRESS_REPEAT,     BTN1_PRESS_REPEAT_Handler);
+	button_attach(&btn1, SINGLE_CLICK,     BTN1_SINGLE_Click_Handler);
+	button_attach(&btn1, DOUBLE_CLICK,     BTN1_DOUBLE_Click_Handler);
+	button_attach(&btn1, LONG_RRESS_START, BTN1_LONG_RRESS_START_Handler);
+	button_attach(&btn2, LONG_PRESS_HOLD,  BTN1_LONG_PRESS_HOLD_Handler);
+	
+	button_attach(&btn2, PRESS_DOWN,       BTN2_PRESS_DOWN_Handler);
+	button_attach(&btn2, PRESS_UP,         BTN2_PRESS_UP_Handler);
+	button_attach(&btn2, PRESS_REPEAT,     BTN2_PRESS_REPEAT_Handler);
+	button_attach(&btn2, SINGLE_CLICK,     BTN2_SINGLE_Click_Handler);
+	button_attach(&btn2, DOUBLE_CLICK,     BTN2_DOUBLE_Click_Handler);
+	button_attach(&btn2, LONG_RRESS_START, BTN2_LONG_RRESS_START_Handler);
+	button_attach(&btn2, LONG_PRESS_HOLD,  BTN2_LONG_PRESS_HOLD_Handler);
+	
+	button_start(&btn1);
+	button_start(&btn2);
+	
+	//make the timer invoking the button_ticks() interval 5ms.
+	//This function is implemented by yourself.
+	__timer_start(button_ticks, 0, 5); 
+	
+	while(1) 
+	{}
+}
+
+void BTN1_PRESS_DOWN_Handler(void* btn)
+{
+	//do something...
+}
+
+void BTN1_PRESS_UP_Handler(void* btn)
+{
+	//do something...
+}
+
+...
\ No newline at end of file
diff --git a/examples/example_poll.c b/examples/example_poll.c
new file mode 100644
index 0000000..510f89e
--- /dev/null
+++ b/examples/example_poll.c
@@ -0,0 +1,37 @@
+#include "multi_button.h"
+
+struct Button btn1;
+
+int read_button1_GPIO() 
+{
+	return HAL_GPIO_ReadPin(B1_GPIO_Port, B1_Pin);
+}
+
+
+int main()
+{
+	static uint8_t btn1_event_val;
+	
+	button_init(&btn1, read_button1_GPIO, 0);
+	button_start(&btn1);
+	
+	//make the timer invoking the button_ticks() interval 5ms.
+	//This function is implemented by yourself.
+	__timer_start(button_ticks, 0, 5); 
+	
+	while(1) 
+	{
+		if(btn1_event_val != get_button_event(&btn1)) {
+			btn1_event_val = get_button_event(&btn1);
+			
+			if(btn1_event_val == PRESS_DOWN) {
+				//do something
+			} else if(btn1_event_val == PRESS_UP) {
+				//do something
+			} else if(btn1_event_val == LONG_PRESS_HOLD) {
+				//do something
+			}
+		}
+	}
+}
+