Diff: usb_host/main.cpp

Revision:

0:6a73d3dc037e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usb_host/main.cpp	Mon Jul 28 20:29:28 2014 +0000
@@ -0,0 +1,60 @@
+// USB host keyboard and LCD demo
+
+#include "mbed.h"
+#include "USBHostKeyboard.h"
+#include "uLCD_4DGL.h"
+
+// LED to demonstrate multi-threading
+DigitalOut led(LED1);
+
+// Graphic LCD - TX, RX, and RES pins
+uLCD_4DGL uLCD(p9,p10,p11);
+
+// Callback function from thread
+void onKey(uint8_t key) {
+    uLCD.printf("%c", key);
+}
+
+// Function that runs continuously in the thread
+void keyboard_task(void const *) {
+    
+    USBHostKeyboard keyboard;
+    
+    while(1) {
+        
+        // Try to connect a USB keyboard
+        uLCD.printf("Waiting...\n");
+        while(!keyboard.connect()) {
+            Thread::wait(500);
+        }
+        uLCD.printf("Connected!\n");
+    
+        // When connected, attach handler called on keyboard event
+        keyboard.attach(onKey);
+        
+        // Wait until the keyboard is disconnected
+        while(keyboard.connected()) {
+            Thread::wait(500);
+        }
+        uLCD.printf("\nDisconnected!\n");
+    }
+}
+
+// Main - the program enters here
+int main() {
+    
+    // Initialize LCD
+    uLCD.baudrate(115200);
+    uLCD.background_color(BLACK);
+    uLCD.cls();
+    uLCD.locate(0,0); 
+    
+    // Create a thread that runs a function (keyboard_task)
+    Thread keyboardTask(keyboard_task, NULL, osPriorityNormal, 256 * 4);
+    
+    // Flash an LED forever
+    while(1) {
+        led=!led;
+        Thread::wait(500);
+    }
+}