1.11   Programmation USB mode utilisateur (2/4)

• Utilisation de tubes de communication :
  • tube de contrôle :

    int typ=USB_TYPE_xxx; /* see usb.h */
    int req=USB_REQ_yyy;  /* see usb.h */
    int val=...;          /* parameter for req */
    int ind=...;          /* parameter for req */
    char data[MAX_DATA];  /* data to send or to receive */
    int size=...;         /* size to send or maximum size to receive */
    char data[]={...};    /* if data to be sent */
    int size=...;         /* size of data */
    int timeout=...;      /* timeout in ms */
    int nb_bytes=usb_control_msg(handle,typ,req,val,ind,size,data,timeout);
    

  • tube pour interruptions :

    int endpoint=...;       /* ID of endpoint */
    char data[MAX_DATA];    /* data to send or to receive */
    int size=...;           /* size to send or maximum size to receive */
    int timeout=...;        /* timeout in ms */
    /* OUT interrupt, from host to device */
    int bytes_out=usb_interrupt_write(handle,endpoint,data,size,timeout);
    /* IN interrupt, host polling device */
    int bytes_in=usb_interrupt_read(handle,endpoint,data,size,timeout);
    

  • tube pour transfert de volume :

    int endpoint=...;       /* ID of endpoint */
    char data[MAX_DATA];    /* data to send or to receive */
    int size=...;           /* size to send or maximum size to receive */
    int timeout=...;        /* timeout in ms */
    /* OUT bulk transfer */
    int bytes_out=usb_bulk_write(handle,endpoint,data,size,timeout);
    /* IN bulk transfer */
    int bytes_in=usb_bulk_read(handle,endpoint,data,size,timeout);
    

  • tube isodromique non implanté.