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USB-HID resetting the pic18f4550

 
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Doglao



Joined: 26 Mar 2007
Posts: 11

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USB-HID resetting the pic18f4550
PostPosted: Fri Nov 26, 2010 1:13 pm     Reply with quote
Hi there!!!

I'm very confused and a bit bored, I'm trying to comunicate with my pic18f4550 in usb hid mode, but after each minute the micro reset and lost the connection, this takes place all time and I don't wanna give up of it, I need help with my source code. this is my code:

Code:


#include <18F4550.h>
//#DEVICE ADC=10

#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN
#use delay(clock=48000000)

// Informa ao fmw do PIC para incluir codido de tratameto HID.
#DEFINE USB_HID_DEVICE  TRUE

// As seguintes definições são necessárias para o driver USB PIC abilitar o endpoint 1 para transmissão
// e separar um spaço para buffer no periférico.
#define USB_EP1_TX_ENABLE  USB_ENABLE_INTERRUPT   // EP1  para entrada de interrupt transfers
#define USB_EP1_TX_SIZE    8  //separa 8 bytes no hardware para transmissão.

// As seguintes definições são necessárias para o driver USB PIC abilitar o endpoint 1 para recepção
// e separar um spaço para buffer no periférico.
#define USB_EP1_RX_ENABLE  USB_ENABLE_INTERRUPT   //EP1 for Saída de interrupt transfers
#define USB_EP1_RX_SIZE    8  //Separa 8 bytes no hardware para receber

#include <pic18_usb.h>   //Microchip 18Fxx5x camada de hardware para usb.c
#include "mult_io_usb_desc_hid.h"  //Configurações USB e descritores do dispositivo
#include <usb.c>        //handles usb setup tokens and get descriptor reports

#include "globals.h"
#include "multi_lcd.h"
#include "texto.h"
#include "i2c/MCP23016Driver.h"
#include "multi_io_config.h"

void per_per(int slave);
void varre_gp(int offset, int gp);
void pin_out(int pin);

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();

   if (new_enumerated)
      LED_ON(LED_ENUM);
   else
      LED_OFF(LED_ENUM);

   if (new_connected && !last_connected)
      txt_conn_enum();//printf("\r\n\nUSB connected\nwait enumaration");
   if (!new_connected && last_connected)
      txt_disc_wait();//printf("\r\n\nUSB disconnected\nwait connection");
   if (new_enumerated && !last_enumerated)
      txt_enum_host();//printf("\r\n\nUSB enumerated\nby PC/HOST");
   if (!new_enumerated && last_enumerated)
      txt_unen_enum();//printf("\r\n\nUSB unen PC/HOST\nwait enumeration");

   last_connected=new_connected;
   last_enumerated=new_enumerated;
}
void main() {   
   int8 delay=0;
   int8 cont_timer = 0;
   setup();  //   configure port
   TotalPin.Gp = 1;
   conta_pin = 0;
   Pointer = 1;
   display=0;
   result = 1;
   usb_init();
   
   while (true) {
      //usb_task();
      usb_debug_task();
      if(usb_enumerated()){ 
         flag_enum = 1;
         delay_ms(1);
         delay++;
         if(delay >= 250){
          //  send_timer = 1;
          delay = 0;
            cont_timer++;
            if(cont_timer >= 0){
               conta_pin++;
               cont_timer = 0;
               out_data[0] = conta_pin;
               out_data[1] = 0;
              // num_xy(9,2,out_data[0]);
               while(!usb_put_packet(1,out_data,2,USB_DTS_TOGGLE));
               if(conta_pin >= 32)
                  conta_pin = 0;
            }
         }
      }
       if (usb_kbhit(1)) {
            usb_get_packet(1, in_data, 2);
            txt_dado_recebido(in_data[0], in_data[1]);
            pin_out(in_data[0]);
         }
   }
}
void per_per(int slave)
{
   int A, B;// Valores + a contagem dos pinos para mostrar a correta posicao
   if(slave == 70){
      A = 1;
      B = 9;
   }
   if(slave == 68){
      A = 17;
      B = 25;
   }
   if(slave == 66){
      A = 33;
      B = 41;
   }
   if(slave == 64){
      A = 49;
      B = 57;
   }
   LeMcp23016(slave, gp0);
   if(iVarGp0 || iVarGp1){
       result = 1;
      if(iVarGp0){
         varre_gp(A,iVarGp0);
         return;
      }
      if(iVarGp1){
         varre_gp(B,iVarGp1);
         return;
      }
   }else
       result = 0;
}

void varre_gp(int offset, int gp)
{
   while(!resultado){
      resultado = Pointer & gp;
      if(resultado) {
         resultado=0;
         out_data[0] = (display+offset);
         out_data[1] = 0;
         num_xy(9,2,display+offset);
         if(flag_enum)
            usb_put_packet(1, out_data, 2, USB_DTS_TOGGLE);
         break;
      }
      Pointer <<= 1;
      display+=1;
   }
   Pointer = 1;
   display = 0;
   out_data[0] = 0;
   delay_ms(25);
}
void pin_out(int pin)
{
   int slave = slave_2;
   int mask_pin = 1;
  // Write_mcp_pin(slave_1,0xff, 0xff);
  // Write_mcp_pin(slave_2,0xff, 0xff);
   if(pin > 16){
      pin = (pin -16);
      slave = slave_1;
   }
   
   if(pin >0 && pin<=8){
      mask_pin <<= pin;
      Write_mcp_pin(slave,~mask_pin, 0xff);
   }
      Write_mcp_pin(slave,0xff, 0xff);

   if(pin >8 && pin<=16)
   {
      mask_pin <<= (pin-8);
      Write_mcp_pin(slave,0xff, ~mask_pin);
   }
}




What's wrong with my code, I'm reading the incoming data from usb, and sends data to outgoing data usb each 250ms, then after few minutes the picmicro freezes or reboot itself.
I did make a minimal source with sample ccs USBHID and nothing wrong occurs , then when I start to populating with more codes, like a lcd, i2c, and so on, the problems appears.
anybody could help me?.

thanks

Douglas Ricardo dos santos Pereira Confused
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Doglao
Ttelmah



Joined: 11 Mar 2010
Posts: 19515

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PostPosted: Fri Nov 26, 2010 3:44 pm     Reply with quote
Given the demo works, rules out the likely hardware problems (inadequate smoothing on the Vusb line is a common problem).

I'd guess you have code using interrupts?.

The most likely thing is that you have some interrupt routine, that takes a long time, or uses another function that is also in the 'main' code, resulting in interrupts being disabled for a significant time somewhere. This _will_ kill USB.

Or you are overflowing the stack. Look at the .sym file, what is the 'worst case' stack useage?.

Best Wishes
Doglao



Joined: 26 Mar 2007
Posts: 11

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PostPosted: Fri Nov 26, 2010 8:56 pm     Reply with quote
Yes Laughing this is the problem, I disabled the interrupts in
both lcd and i2c source code with long times, thanks a
lot, now this is running at this moment and no reset, but
the lcd is corrupted, appearing wrong characters.
I think to use RTOS to separate in tasks the lcd, i2c and usb, I don't have experience with RTOS, is good time to start learn more about this.

thanks Ttelmah

Douglas Ricardo dos Santos Pereira
_________________
Breaking rocks in the hot sun!
Doglao
Doglao



Joined: 26 Mar 2007
Posts: 11

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PostPosted: Fri Nov 26, 2010 9:17 pm     Reply with quote
It's too early to say that this running now, return to resetting again.
_________________
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Doglao
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