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PIC18F4550 CDC communication with C18

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Matheus_Carvalho

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Hi,
I'm trying to make a code for Pic serial communication with Labview by serial RS-232. I'm using bootloader together, this is the code:
**************************************************************************************************************
#INCLUDES
**************************************************************************************************************/
#include <p18f4550.h>
#include <stdio.h>
#include <delays.h>
#include <timers.h>
#include <adc.h>
#include <GenericTypeDefs.h>
#include <usb_config.h>
#include <usb_descriptors.c>
#include <usb_device.h>
#include <usb.h>
#include <usb_function_cdc.h>
#include <HardwareProfile.h>

/**************************************************************************************************************
#Desvio das funções de reset e interrupções para a posição acima de 0x1000 (MODO BOOTLOADER)
**************************************************************************************************************/
extern void _startup (void);
void ISR_alta_prioridade (void);
#pragma code _RESET_INTERRUPT_VECTOR = 0x1000
void _reset (void)
{
_asm
goto _startup
_endasm
}
#pragma code

void ISR_alta_prioridade (void);
#pragma code _HIGH_INTERRUPT_VECTOR = 0x1008
void _high_ISR (void)
{
_asm
goto ISR_alta_prioridade
_endasm
}
#pragma code
#pragma interrupt ISR_alta_prioridade

void ISR_alta_prioridade (void)
{
USBDeviceTasks();
}
/**************************************************************************************************************
Função Necessária quando o USB_INTERRUPT está ativado
**************************************************************************************************************/
BOOL USER_USB_CALLBACK_EVENT_HANDLER(USB_EVENT event, void *pdata, WORD size)
{
switch(event)
{
/* Este evento é disparado quando o dispositivo recebe uma solicitação */
/* SET_CONFIGURATION enviada pelo host (wValue = 0) */
case EVENT_CONFIGURED:
/* Inicia os endpoints para o uso do dispositivo de acordo com a configuraçao atual (CDC) */
/* Seta o baud rate, bit parity, stop bit e o número de bits de dado */
/* A configuração padrão está indicada a seguir */
/* Baud rate: 19.200 bps */
/* Bit de parada: 1 */
/* Bit de paridade: sem */
/* Número de bits do dado: 8 bits */
/* Para modificar esta configuração, basta abrir o arquivo usb_function_cdc.c e modificar os campos de função CDCInitEP() */
CDCInitEP();
break;

/* Este evento é disparado quando o dispositivo recebe um pacote de SETUP enviado pelo host e devem responder para complementar a solicitação */
case EVENT_EP0_REQUEST:
USBCheckCDCRequest(); /* Verifica e trata a solicitação */
break;

case EVENT_TRANSFER:
Nop();
break;

default:
break;
}
return 1;
}
#define led PORTDbits.RD0
#define botao PORTBbits.RB4
void main()
{
TRISB = 0xFF;
TRISD = 0x00;
USBDeviceInit();
USBDeviceAttach();
PIR2bits.USBIF=0; //Limpa o flag de interrupção do USB
IPR2bits.USBIP=1; //Interrupção USB - Alta Prioridade
RCONbits.IPEN=1; //Habilita interrupção com nivel de prioridade
INTCONbits.GIEH=1; //Habilita todas as interrupções de alta prioridade
INTCONbits.GIEL=1; //Habilita todas as interrupções de baixa prioridade

while (1)
{
if (!botao)
led = 1;
else
led = 0;
if (USBUSARTIsTxTrfReady())
putrsUSBUSART("USP");
CDCTxService();
Delay10KTCYx(50);
USBDeviceTasks();
}
}
When I plug it in my computer (Windows 7 64bits), it appears a serial port (com4), but when I didn't receive any data by serial. I'm trying to send 'USP', but it doesn't work. Could anyone help me with this code?
Thanks a lot.
 

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