mbed Starter Kit / mbed Starter Kit Demo Programs

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

usb_host/main.cpp@0:6a73d3dc037e, 2014-07-28 (annotated)

Committer:
ShawnHymel
Date:
Mon Jul 28 20:29:28 2014 +0000
Revision:
0:6a73d3dc037e
Added main.cpp files from each of the demo programs. Libraries are not included.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ShawnHymel 0:6a73d3dc037e 1 // USB host keyboard and LCD demo
ShawnHymel 0:6a73d3dc037e 2
ShawnHymel 0:6a73d3dc037e 3 #include "mbed.h"
ShawnHymel 0:6a73d3dc037e 4 #include "USBHostKeyboard.h"
ShawnHymel 0:6a73d3dc037e 5 #include "uLCD_4DGL.h"
ShawnHymel 0:6a73d3dc037e 6
ShawnHymel 0:6a73d3dc037e 7 // LED to demonstrate multi-threading
ShawnHymel 0:6a73d3dc037e 8 DigitalOut led(LED1);
ShawnHymel 0:6a73d3dc037e 9
ShawnHymel 0:6a73d3dc037e 10 // Graphic LCD - TX, RX, and RES pins
ShawnHymel 0:6a73d3dc037e 11 uLCD_4DGL uLCD(p9,p10,p11);
ShawnHymel 0:6a73d3dc037e 12
ShawnHymel 0:6a73d3dc037e 13 // Callback function from thread
ShawnHymel 0:6a73d3dc037e 14 void onKey(uint8_t key) {
ShawnHymel 0:6a73d3dc037e 15 uLCD.printf("%c", key);
ShawnHymel 0:6a73d3dc037e 16 }
ShawnHymel 0:6a73d3dc037e 17
ShawnHymel 0:6a73d3dc037e 18 // Function that runs continuously in the thread
ShawnHymel 0:6a73d3dc037e 19 void keyboard_task(void const *) {
ShawnHymel 0:6a73d3dc037e 20
ShawnHymel 0:6a73d3dc037e 21 USBHostKeyboard keyboard;
ShawnHymel 0:6a73d3dc037e 22
ShawnHymel 0:6a73d3dc037e 23 while(1) {
ShawnHymel 0:6a73d3dc037e 24
ShawnHymel 0:6a73d3dc037e 25 // Try to connect a USB keyboard
ShawnHymel 0:6a73d3dc037e 26 uLCD.printf("Waiting...\n");
ShawnHymel 0:6a73d3dc037e 27 while(!keyboard.connect()) {
ShawnHymel 0:6a73d3dc037e 28 Thread::wait(500);
ShawnHymel 0:6a73d3dc037e 29 }
ShawnHymel 0:6a73d3dc037e 30 uLCD.printf("Connected!\n");
ShawnHymel 0:6a73d3dc037e 31
ShawnHymel 0:6a73d3dc037e 32 // When connected, attach handler called on keyboard event
ShawnHymel 0:6a73d3dc037e 33 keyboard.attach(onKey);
ShawnHymel 0:6a73d3dc037e 34
ShawnHymel 0:6a73d3dc037e 35 // Wait until the keyboard is disconnected
ShawnHymel 0:6a73d3dc037e 36 while(keyboard.connected()) {
ShawnHymel 0:6a73d3dc037e 37 Thread::wait(500);
ShawnHymel 0:6a73d3dc037e 38 }
ShawnHymel 0:6a73d3dc037e 39 uLCD.printf("\nDisconnected!\n");
ShawnHymel 0:6a73d3dc037e 40 }
ShawnHymel 0:6a73d3dc037e 41 }
ShawnHymel 0:6a73d3dc037e 42
ShawnHymel 0:6a73d3dc037e 43 // Main - the program enters here
ShawnHymel 0:6a73d3dc037e 44 int main() {
ShawnHymel 0:6a73d3dc037e 45
ShawnHymel 0:6a73d3dc037e 46 // Initialize LCD
ShawnHymel 0:6a73d3dc037e 47 uLCD.baudrate(115200);
ShawnHymel 0:6a73d3dc037e 48 uLCD.background_color(BLACK);
ShawnHymel 0:6a73d3dc037e 49 uLCD.cls();
ShawnHymel 0:6a73d3dc037e 50 uLCD.locate(0,0);
ShawnHymel 0:6a73d3dc037e 51
ShawnHymel 0:6a73d3dc037e 52 // Create a thread that runs a function (keyboard_task)
ShawnHymel 0:6a73d3dc037e 53 Thread keyboardTask(keyboard_task, NULL, osPriorityNormal, 256 * 4);
ShawnHymel 0:6a73d3dc037e 54
ShawnHymel 0:6a73d3dc037e 55 // Flash an LED forever
ShawnHymel 0:6a73d3dc037e 56 while(1) {
ShawnHymel 0:6a73d3dc037e 57 led=!led;
ShawnHymel 0:6a73d3dc037e 58 Thread::wait(500);
ShawnHymel 0:6a73d3dc037e 59 }
ShawnHymel 0:6a73d3dc037e 60 }