So far I have tried these libraries:
- DigiCDC
- DigiUSB
Which is the one you suggested.
For the DigiUSB I have modified the library files for the USB device class, vendor, product-id and interfaceClass inside -usbconfig.h-, I have managed to get it only "recognized" but I cant manage to send data from JS into the webusb. Apparently the interface in and out are not properly created and is missing the "in".
The code I use is from the blink example:
#define USB_CFG_DEVICE_NAME 'D','i','g','i','B','l','i','n','k'
#define USB_CFG_DEVICE_NAME_LEN 9
#include <DigiUSB.h>
byte in = 0;
int Blue = 0;
int Red = 0;
int Green = 0;
int next = 0;
void setup() {
DigiUSB.begin();
pinMode(0,OUTPUT);
pinMode(1,OUTPUT);
pinMode(2,OUTPUT);
}
void loop() {
setBlue();
DigiUSB.refresh();
setBlue();
if (DigiUSB.available() > 0) {
in = 0;
in = DigiUSB.read();
if (next == 0){
if(in == 115){
next = 1;
DigiUSB.println("Start");
}
}
else if (next == 1){
Red = in;
DigiUSB.print("Red ");
DigiUSB.println(in,DEC);
next = 2;
}
else if (next == 2){
Green = in;
DigiUSB.print("Green ");
DigiUSB.println(in,DEC);
next = 3;
}
else if (next == 3){
Blue = in;
DigiUSB.print("Blue ");
DigiUSB.println(in,DEC);
next = 0;
}
}
analogWrite(0,Red);
analogWrite(1,Green);
setBlue();
}
void setBlue(){
if(Blue == 0){
digitalWrite(2,LOW);
return;
}
else if(Blue == 255){
digitalWrite(2,HIGH);
return;
}
// On period
for (int x=0;x<Blue;x++){
digitalWrite(2,HIGH);
}
// Off period
for(int x=0;x<(255-Blue);x++){
digitalWrite(2,LOW);
}
}
I have also discovered that some of these libraries were made when the webusb specification came out when aparently chrome was able to freely connect to HID, then they changed into connecting only to "custom devices" and those devices require to set up a propper "interface" for in and out communication. According to the arduino specification for atmega32u4, it generates 3 interfaces, 2 of which have in and out controls. There is where I got stuck, I don't know how exactly migrate the VUSB to support these in out sections.
