Hola a todo el mundo.
Despues de leer bastantes hilo por este y otros foros no he conseguido resolver mi problema, de hecho si no hubiera leido no habria llegado hasta este punto.
Estoy haciendo un dispositivo de juegos con un 18f2550 por USB HID y estoy usando CCS, el objetivo es que el dispositivo tenga 5 ejes.
Empece con el ejemplo que trae el compilador de un raton USB. Le modifique el descriptor y lo converti en dispoitivo de juegos, me costo, era una tonteria pero soy navato co los pic's y cada paso es despues de mucho leer y mucho probar. Tambien me apoye en el programa HID Descriptor Tool.
Otro logro, ayudado por el USBView fue, convertir el ejemplo del raton, de HID version 1.0 y USB 1.1 a HID 1.11 y USB 2.0, revisando los datos que me daba el programa del descriptor de un G27 que tengo enchufado.
Despues vino el modificar el ejemplo convertirlo en 5 ejes analogicos de 10 bits. Lo delos 10 bits lo resolvi rapido, pero lo de modificar el descriptor que lo veia facil, me costo bastantes dias de mas ller y mas probar, hasta que encontre un ejemplo de willynovi de un descriptor de un dispositivo de 6 ejes y vi el cielo abierto.
Pero algo debo tener mal en algun sitio, por que añadir mas de cuatro ejes supone que el dispositivo es detectado y enumerado correctamente, pero no recibe datos de los potenciometros de los ejes.
Los cinco ejes se quedan fijos en el centro de su recorrido y ya esta.
El concepto lo tengo bien, o eso creo, por que con 4 ejes el dispositivo funciona perfectamente, pero es añadir el 5 eje al descriptor y aumentar el array de recogida de datos en 2 bytes mas, y dejar de funcionar.
Creo que el problema puede estar en el tamaño del ENDPOINT que en el ejemplo del raton que use estaba a 8, supongo que es un tamaño de 8 bytes, segun lo que he leido de teoria del USB, pero aunque le ponga 10, 12 o 64, el tamaño maximo de los ENDPOINT, el comportamiento es el mismo.
Ya he agotado toda mi inventiva y rebuscando por los foros no veo donde tengo el problema, asi que acudo a alguien para que me revise y me diga donde esta el error, por que como os digo yo no lo veo.
A continuacion os pongo los codigos fuente de los archivos que estoy usando:
#define __USB_PIC_PERIF__ 1
#include <18F2550.h>
#DEVICE ADC=10
//~~~ 20MHZ OSCILLATOR CONFIGS ~~~//
//// FULL SPEED
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN
#use delay(clock=48000000)
#DEFINE USB_HID_DEVICE TRUE //Tells the CCS PIC USB firmware
//to include HID handling code.
//turn on EP1 for IN interrupt transfers. (IN = PIC -> PC)
#define USB_EP1_TX_ENABLE USB_ENABLE_INTERRUPT
#define USB_EP1_TX_SIZE 16 //max packet size of this endpoint
#include <pic18_usb.h> //Microchip PIC18Fxx5x hardware layer for usb.c
#include <usb_desc_mouse2.h> //USB Configuration and Device descriptors for this UBS device
#include <usb.c> //handles usb setup tokens and get descriptor reports
// Esta función configura el registro ADCON2.
void config_adcon2() {
#asm
movlw 0b10111110 ; justificacion_derecha,20Tad,Fosc/64
iorwf 0xFC0,1 ; direccion de ADCON2.
#endasm
}
void usb_debug_task(void) {
static int8 last_connected;
static int8 last_enumerated;
int8 new_connected;
int8 new_enumerated;
new_connected=usb_attached();
new_enumerated=usb_enumerated();
last_connected=new_connected;
last_enumerated=new_enumerated;
}
void main(void) {
long dato;
int8 out_data[10];
set_tris_a (0b0101111);
set_tris_b (0b00000000);
set_tris_c (0b00000000);
SETUP_ADC(ADC_CLOCK_DIV_64 || VSS_VREF);
SETUP_ADC_PORTS(AN0_TO_AN4);
usb_init_cs();
config_adcon2(); // Configuramos el conversor analógico digital.
while (TRUE)
{
usb_task();
usb_debug_task();
if (usb_enumerated())
{
SET_ADC_CHANNEL(PIN_A0);
dato= read_adc();
out_data[0]=(int)dato;
out_data[1]=dato>>8;
SET_ADC_CHANNEL(PIN_A1);
dato= read_adc();
out_data[2]=(int)dato;
out_data[3]=dato>>8;
SET_ADC_CHANNEL(PIN_A2);
dato= read_adc();
out_data[4]=(int)dato;
out_data[5]=dato>>8;
SET_ADC_CHANNEL(PIN_A3);
dato= read_adc();
out_data[6]=(int)dato;
out_data[7]=dato>>8;
SET_ADC_CHANNEL(PIN_A5);
dato= read_adc();
out_data[8]=(int)dato;
out_data[9]=dato>>8;
usb_put_packet(1,out_data,10,USB_DTS_TOGGLE);
}
}
}
A continuacion el codigo del descriptor
#IFNDEF __USB_DESCRIPTORS__
#DEFINE __USB_DESCRIPTORS__
///////// config options, although it's best to leave alone for this demo /////
#define USB_CONFIG_PID 0x0022
#define USB_CONFIG_VID 0x0461
#define USB_CONFIG_BUS_POWER 100 //100mA (range is 0..500)
#define USB_CONFIG_VERSION 0x0200 //01.00 //range is 00.00 to 99.99
//////// end config ///////////////////////////////////////////////////////////
#DEFINE USB_HID_DEVICE TRUE //Tells the CCS PIC USB firmware
//to include HID handling code.
//turn on EP1 for IN interrupt transfers. (IN = PIC -> PC)
#define USB_EP1_TX_ENABLE USB_ENABLE_INTERRUPT
#define USB_EP1_TX_SIZE 16 //max packet size of this endpoint
#include <usb.h>
const char USB_CLASS_SPECIFIC_DESC[] =
{
0x05, 0x01, // Usage Page (Generic Desktop)
0x09, 0x04, // Usage (Joy)
0xA1, 0x00, // Collection (Physical)
0x09, 0x30, // Usage (X)
0x09, 0x31, // Usage (Y)
0x15, 0x00, // Log Min (0)
0x26, 0xFF, 0x03, // Log Max (1023)
0x75, 0x10, // Report Size (16)
0x95, 0x02, // Report Count (2)
0x81, 0x02, // Input (Data, Variable, Absolute)
0x09, 0x32, // Usage (Z)
0x15, 0x00, // Log Min (0)
0x26, 0xFF, 0x03, // Log Max (1023)
0x75, 0x10, // Report Size (16)
0x95, 0x01, // Report Count (1)
0x81, 0x02, // Input (Data, Variable, Absolute)
0x09, 0x33, // Usage (Rx)
0x15, 0x00, // Log Min (0)
0x26, 0xFF, 0x03, // Log Max (1023)
0x75, 0x10, // Report Size (16)
0x95, 0x01, // Report Count (1)
0x81, 0x02, // Input (Data, Variable, Absolute)
0x09, 0x34, // Usage (Ry)
0x15, 0x00, // Log Min (0)
0x26, 0xFF, 0x03, // Log Max (1023)
0x75, 0x10, // Report Size (16)
0x95, 0x01, // Report Count (1)
0x81, 0x02, // Input (Data, Variable, Absolute)
0xc0
};
//if a class has an extra descriptor not part of the config descriptor,
// this lookup table defines where to look for it in the const
// USB_CLASS_SPECIFIC_DESC[] array.
//first element is the config number (if your device has more than one config)
//second element is which interface number
//set element to 0xFFFF if this config/interface combo doesn't exist
const int16 USB_CLASS_SPECIFIC_DESC_LOOKUP[USB_NUM_CONFIGURATIONS][1] =
{
//config 1
//interface 0
0
};
//if a class has an extra descriptor not part of the config descriptor,
// this lookup table defines the size of that descriptor.
//first element is the config number (if your device has more than one config)
//second element is which interface number
//set element to 0xFFFF if this config/interface combo doesn't exist
const int16 USB_CLASS_SPECIFIC_DESC_LOOKUP_SIZE[USB_NUM_CONFIGURATIONS][1] =
{
//config 1
//interface 0
sizeof(USB_CLASS_SPECIFIC_DESC)
};
//////////////////////////////////////////////////////////////////
///
/// start config descriptor
/// right now we only support one configuration descriptor.
/// the config, interface, class, and endpoint goes into this array.
///
//////////////////////////////////////////////////////////////////
#DEFINE USB_TOTAL_CONFIG_LEN 34 //config+interface+class+endpoint
const char USB_CONFIG_DESC[] = {
//IN ORDER TO COMPLY WITH WINDOWS HOSTS, THE ORDER OF THIS ARRAY MUST BE:
// config(s)
// interface(s)
// class(es)
// endpoint(s)
//config_descriptor for config index 1
USB_DESC_CONFIG_LEN, //length of descriptor size ==1
USB_DESC_CONFIG_TYPE, //constant CONFIGURATION (CONFIGURATION 0x02) ==2
USB_TOTAL_CONFIG_LEN,0, //size of all data returned for this config ==3,4
1, //number of interfaces this device supports ==5
0x01, //identifier for this configuration. (IF we had more than one configurations) ==6
0x00, //index of string descriptor for this configuration ==7
0xC0, //bit 6=1 if self powered, bit 5=1 if supports remote wakeup (we don't), bits 0-4 unused and bit7=1 ==8
0x32, //bit 6=1 if self powered, bit 5=1 if supports remote wakeup (we don't), bits 0-4 unused and bit7=1 ==8
//interface descriptor 1
USB_DESC_INTERFACE_LEN, //length of descriptor =10
USB_DESC_INTERFACE_TYPE, //constant INTERFACE (INTERFACE 0x04) =11
0x00, //number defining this interface (IF we had more than one interface) ==12
0x00, //alternate setting ==13
1, //number of endpoints, except 0 ==14
0x03, //class code, 03 = HID ==15
0x01, //subclass code //boot ==16
0x02, //protocol code ==17
0x00, //index of string descriptor for interface ==18
//class descriptor 1 (HID)
USB_DESC_CLASS_LEN, //length of descriptor ==19
USB_DESC_CLASS_TYPE, //dscriptor type (0x21 == HID) ==20
0x11,0x01, //hid class release number (1.0) (try 1.10) ==21,22
0x00, //localized country code (0 = none) ==23
0x01, //number of hid class descrptors that follow (1) ==24
0x22, //report descriptor type (0x22 == HID) ==25
USB_CLASS_SPECIFIC_DESC_LOOKUP_SIZE[0][0], 0x00, //length of report descriptor ==26,27
//endpoint descriptor
USB_DESC_ENDPOINT_LEN, //length of descriptor ==28
USB_DESC_ENDPOINT_TYPE, //constant ENDPOINT (ENDPOINT 0x05) ==29
0x81, //endpoint number and direction (0x81 = EP1 IN) ==30
USB_ENDPOINT_TYPE_INTERRUPT, //transfer type supported (0x03 is interrupt) ==31
USB_EP1_TX_SIZE,0x00, //maximum packet size supported ==32,33
10 //polling interval, in ms. (cant be smaller than 10 for slow speed devices) ==34
};
//****** BEGIN CONFIG DESCRIPTOR LOOKUP TABLES ********
//since we can't make pointers to constants in certain pic16s, this is an offset table to find
// a specific descriptor in the above table.
//NOTE: DO TO A LIMITATION OF THE CCS CODE, ALL HID INTERFACES MUST START AT 0 AND BE SEQUENTIAL
// FOR EXAMPLE, IF YOU HAVE 2 HID INTERFACES THEY MUST BE INTERFACE 0 AND INTERFACE 1
#define USB_NUM_HID_INTERFACES 1
//the maximum number of interfaces seen on any config
//for example, if config 1 has 1 interface and config 2 has 2 interfaces you must define this as 2
#define USB_MAX_NUM_INTERFACES 1
//define how many interfaces there are per config. [0] is the first config, etc.
const char USB_NUM_INTERFACES[USB_NUM_CONFIGURATIONS]={1};
//define where to find class descriptors
//first dimension is the config number
//second dimension specifies which interface
//last dimension specifies which class in this interface to get, but most will only have 1 class per interface
//if a class descriptor is not valid, set the value to 0xFFFF
const int16 USB_CLASS_DESCRIPTORS[USB_NUM_CONFIGURATIONS][USB_NUM_HID_INTERFACES][1]=
{
//config 1
//interface 0
//class 1
18
};
#if (sizeof(USB_CONFIG_DESC) != USB_TOTAL_CONFIG_LEN)
#error USB_TOTAL_CONFIG_LEN not defined correctly
#endif
//////////////////////////////////////////////////////////////////
///
/// start device descriptors
///
//////////////////////////////////////////////////////////////////
const char USB_DEVICE_DESC[] = {
//starts of with device configuration. only one possible
USB_DESC_DEVICE_LEN, //the length of this report ==1
0x01, //the constant DEVICE (DEVICE 0x01) ==2
0x00,0x02, //usb version in bcd (pic167xx is 2.0) ==3,4
0x00, //class code ==5
0x00, //subclass code ==6
0x00, //protocol code ==7
USB_MAX_EP0_PACKET_LENGTH, //max packet size for endpoint 0. (SLOW SPEED SPECIFIES 8) ==8
USB_CONFIG_VID & 0xFF, ((USB_CONFIG_VID >> 8) & 0xFF), //vendor id ==9, 10
USB_CONFIG_PID & 0xFF, ((USB_CONFIG_PID >> 8) & 0xFF), //product id, don't use 0xffff ==11, 12
USB_CONFIG_VERSION & 0xFF, ((USB_CONFIG_VERSION >> 8) & 0xFF), //device release number ==13,14
0x01, //index of string description of manufacturer. therefore we point to string_1 array (see below) ==15
0x02, //index of string descriptor of the product ==16
0x00, //index of string descriptor of serial number ==17
USB_NUM_CONFIGURATIONS //number of possible configurations ==18
};
#if (sizeof(USB_DEVICE_DESC) != USB_DESC_DEVICE_LEN)
#error USB_DESC_DEVICE_LEN not defined correctly
#endif
//////////////////////////////////////////////////////////////////
///
/// start string descriptors
/// String 0 is a special language string, and must be defined. People in U.S.A. can leave this alone.
///
//////////////////////////////////////////////////////////////////
//the offset of the starting location of each string. offset[0] is the start of string 0, offset[1] is the start of string 1, etc.
const char USB_STRING_DESC_OFFSET[]={0,4,12};
//number of strings you have, including string 0.
#define USB_STRING_DESC_COUNT sizeof(USB_STRING_DESC_OFFSET)
// Here is where the "CCS" Manufacturer string and "CCS USB Mouse" are stored.
// Strings are saved as unicode.
char const USB_STRING_DESC[]={
//string 0
4, //length of string index
USB_DESC_STRING_TYPE, //descriptor type 0x03 (STRING)
0x09,0x04, //Microsoft Defined for US-English
//string 1
8, //length of string index
USB_DESC_STRING_TYPE, //descriptor type 0x03 (STRING)
'C',0,
'C',0,
'S',0,
//string 2
28, //length of string index
USB_DESC_STRING_TYPE, //descriptor type 0x03 (STRING)
'C',0,
'C',0,
'S',0,
' ',0,
'U',0,
'S',0,
'B',0,
' ',0,
'M',0,
'o',0,
'u',0,
's',0,
'e',0
};
Como ven todabia conservo el nombre del dispositivo del ejemplo del raton del CCS.
El proyecto lo compilo y lo quemo en el pic que lo tengo en una placa de prototipado, no uso emuladores.
Por si les sirve de algo la informacion, estoy usando Win7 64b y el CCS version 4.104
Muchas gracias por leerse el ladrillaco.