USB firmware of CDC and HID for PIC18F2550, PIC24FJ64GB002

<< Reference >>

Microchip Libraries for Applications (MLA) v2014_07_22

 

<< Two my boards >>

1)    My UBW board with PIC18F2550 (in my page on Jan. 16, 2014) works as a USB device.

A configuration of CONFIG1L register of a USB bootloader is set to “Divide by 5 (20 MHz oscillator input) and 96 MHz PLL divided by 2 to derive system clock”, so Fosc is 48MHz derived from a primary oscillator using a 20MHz ceramic resonator.

 

LED : RC0, RC1;    Switch (pull down) : MCLR, RC2;

LCD (SC1602BBWB-XA-GB-G) : RS – RB2, R/W – GND, E – RB3, Data bus – RB4~RB7;

USART : RC6 for USART_TX,   RC7 for UART_RX;

 

2)    My board with PIC24FJ64GB002 (of my page on Aug. 31, 2014) works as both a USB device and a USB host.

FRC 8 MHz – 96 MHz PLL;
48 MHz for USB Module (96 MHz PLL divide by 2);
32 MHz for System Clock (96 MHz PLL divide by 3);

LED : RB0, RB1;    Switch (pull down) : MCLR, RB2;

LCD (SC1602BBWB-XA-GB-G) : RS – RB7, R/W – GND, E – RB8, Data bus : DB4 – RB9, DB5 – RB13, DB6 – RB14, DB7 – RB15;

UART : RA0 for U2RX,   RA1 for U2TX;

 

 

<< USB Device : CDC (Communication Device Class)  Serial Emulator >>

USB CDC device

 

It is necessary to select the appropriate configuration in the project of MPLAB X IDE when compiling by XC8 for PIC18F2550 or XC16 for PIC24FJ64GB002.

 (not including a driver for a Personal-Computer)

 

 

<< USB Host: CDC >>

No picture.

Code for my board with PIC24FJ64GB002 :

 (not including a driver for a Personal-Computer)

 

 

<< USB host : HID (Human Interface Device) class >>

USB host HID Keyboard

 

Code for my board with PIC24FJ64GB002 (outputting a ASCII code translated from a HID code) :

 (containing a bug relating to PnP (plug and play))

 

 

<< A demonstration experiment >>

Keypad – USB – Host (24FJ64GB002) – UART – Device (18F2550) – USB – PC (terminal soft):

Host CDC Device

The upper board (PIC18F2550) practices a USB serial emulator  and the lower (PIC24FJ64GB002) does a USB HID.    A PC (terminal soft) is not shown in the above picture.