main.cpp

00001 /* LAB10_USBHID_demo
00002  *
00003  * This is a very simple Generic HID demo, which is based on the 
00004  * example program shown in the Cypress AN82072 Application Note.
00005  * Due to the similarities, you can use the graphical PC application
00006  * from the published in the downloadable software package of the above 
00007  * mentioned Application Note, if you set the Vid/PId valuaes of aur device 
00008  * (VID = 0x1234, PID = 0x0006). 
00009  * Note, that besides the Generic Hid Ui.exe executable, you also need 
00010  * the dynamic library cyUSB.dll as well (freom the same ZIP package)
00011  */
00012 
00013 #include "mbed.h"
00014 #include "USBHID.h"
00015 
00016 //We declare a USBHID device. By default input and output reports are 8 bytes long.
00017 USBHID hid(8, 8);
00018 
00019 HID_REPORT send_report;        //This report will contain data to be sent
00020 HID_REPORT recv_report;        //This report will contain data received
00021 
00022 DigitalOut LED_1(LED1);        //Buitin KED at PA5
00023 PwmOut LED_2(D3);              //External LED at D3 (PB3)
00024 DigitalOut myGND(D4);
00025 DigitalIn SW1(BUTTON1,PullUp); //Builtin button at PC13
00026 AnalogIn adc(A0);              //Analog input at A0 (PA0)
00027 
00028 int main(void) {
00029     send_report.length = 8;
00030     LED_1 = 0;
00031     LED_2.period_ms(20);
00032     myGND = 0;
00033     while (1) {
00034         uint16_t raw = adc.read_u16();                  //Read ADC (A0 chan)
00035         for (int i = 0; i < send_report.length; i++)    //Fill the report
00036             send_report.data[i] = 0x00;
00037         send_report.data[0] = !SW1.read();
00038         send_report.data[3] = (raw>>8);
00039         send_report.data[4] = (raw & 0xff);
00040         hid.send(&send_report);                         //Send the report
00041 
00042         if(hid.readNB(&recv_report)) {                  //try to read a msg
00043             LED_1 = recv_report.data[0];
00044             LED_2.write(recv_report.data[1]*0.01f);
00045         }
00046     }
00047 }