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# usb_drv.c

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    00001 /*This file has been prepared for Doxygen automatic documentation generation.*/
    00013
    00014 /* Copyright (c) 2007, Atmel Corporation All rights reserved.
    00015  *
    00016  * Redistribution and use in source and binary forms, with or without
    00017  * modification, are permitted provided that the following conditions are met:
    00018  *
    00019  * 1. Redistributions of source code must retain the above copyright notice,
    00020  * this list of conditions and the following disclaimer.
    00021  *
    00022  * 2. Redistributions in binary form must reproduce the above copyright notice,
    00023  * this list of conditions and the following disclaimer in the documentation
    00024  * and/or other materials provided with the distribution.
    00025  *
    00026  * 3. The name of ATMEL may not be used to endorse or promote products derived
    00027  * from this software without specific prior written permission.
    00028  *
    00029  * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED
    00030  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    00031  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
    00032  * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
    00033  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    00034  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    00035  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    00036  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    00037  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    00038  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    00039  */
    00040
    00041 //_____ I N C L U D E S ____________________________________________________
    00042
    00043 #include "config.h"
    00044 #include "conf_usb.h"
    00045 #include "usb_drv.h"
    00046
    00047 //_____ M A C R O S ________________________________________________________
    00048
    00049 //_____ D E C L A R A T I O N ______________________________________________
    00050
    00051 #if (USB_DEVICE_FEATURE==DISABLED && USB_HOST_FEATURE==DISABLED)
    00052    #error at least one of  USB_DEVICE_FEATURE or USB_HOST_FEATURE should be unabled
    00053 #endif
    00054
    00055 #if (USB_DEVICE_FEATURE == ENABLED)
    00056
    00067 U8 usb_config_ep(U8 config0, U8 config1)
    00068 {
    00069     Usb_enable_endpoint();
    00070     UECFG0X = config0;
    00071     UECFG1X = (UECFG1X & (1<<ALLOC)) | config1;
    00072     Usb_allocate_memory();
    00073     return (Is_endpoint_configured());
    00074 }
    00075
    00087 U8 usb_select_enpoint_interrupt(void)
    00088 {
    00089 U8 interrupt_flags;
    00090 U8 ep_num;
    00091
    00092    ep_num = 0;
    00093    interrupt_flags = Usb_interrupt_flags();
    00094
    00095    while(ep_num < MAX_EP_NB)
    00096    {
    00097       if (interrupt_flags & 1)
    00098       {
    00099          return (ep_num);
    00100       }
    00101       else
    00102       {
    00103          ep_num++;
    00104          interrupt_flags = interrupt_flags >> 1;
    00105       }
    00106    }
    00107    return 0;
    00108 }
    00109
    00130 U8 usb_send_packet(U8 ep_num, U8* tbuf, U8 data_length)
    00131 {
    00132 U8 remaining_length;
    00133
    00134    remaining_length = data_length;
    00135    Usb_select_endpoint(ep_num);
    00136    while(Is_usb_write_enabled() && (0 != remaining_length))
    00137    {
    00138       Usb_write_byte(*tbuf);
    00139       remaining_length--;
    00140       tbuf++;
    00141    }
    00142    return remaining_length;
    00143 }
    00144
    00165 U8 usb_read_packet(U8 ep_num, U8* rbuf, U8  data_length)
    00166 {
    00167 U8 remaining_length;
    00168
    00169    remaining_length = data_length;
    00170    Usb_select_endpoint(ep_num);
    00171
    00172    while(Is_usb_read_enabled() && (0 != remaining_length))
    00173    {
    00174       *rbuf = Usb_read_byte();
    00175       remaining_length--;
    00176       rbuf++;
    00177    }
    00178    return remaining_length;
    00179 }
    00180
    00191 void usb_halt_endpoint (U8 ep_num)
    00192 {
    00193    Usb_select_endpoint(ep_num);
    00194    Usb_enable_stall_handshake();
    00195 }
    00196
    00207 U8 usb_init_device (void)
    00208 {
    00209    Usb_select_device();
    00210    if(Is_usb_id_device())
    00211    {
    00212       Usb_select_endpoint(EP_CONTROL);
    00213       if(!Is_usb_endpoint_enabled())
    00214       {
    00215 #if (USB_LOW_SPEED_DEVICE==DISABLE)
    00216          return usb_configure_endpoint(EP_CONTROL,    \
    00217                                 TYPE_CONTROL,  \
    00218                                 DIRECTION_OUT, \
    00219                                 SIZE_64,       \
    00220                                 ONE_BANK,      \
    00221                                 NYET_DISABLED);
    00222 #else
    00223          return usb_configure_endpoint(EP_CONTROL,    \
    00224                                 TYPE_CONTROL,  \
    00225                                 DIRECTION_OUT, \
    00226                                 SIZE_8,       \
    00227                                 ONE_BANK,      \
    00228                                 NYET_DISABLED);
    00229 #endif
    00230       }
    00231    }
    00232    return FALSE;
    00233 }
    00234
    00235 #endif
    00236
    00240
    00241 #if (USB_HOST_FEATURE == ENABLED)
    00242
    00252 U8 host_config_pipe(U8 config0, U8 config1)
    00253 {
    00254     Host_enable_pipe();
    00255     UPCFG0X = config0;
    00256     UPCFG1X = config1;
    00257     Host_allocate_memory();
    00258     return (Is_pipe_configured());
    00259 }
    00260
    00268 U8 host_determine_pipe_size(U16 size)
    00269 {
    00270         if(size <= 8  ) {return (SIZE_8   );}
    00271    else if(size <= 16 ) {return (SIZE_16  );}
    00272    else if(size <= 32 ) {return (SIZE_32  );}
    00273    else if(size <= 64 ) {return (SIZE_64  );}
    00274    else if(size <= 128) {return (SIZE_128 );}
    00275    else if(size <= 256) {return (SIZE_256 );}
    00276    else if(size <= 512) {return (SIZE_512 );}
    00277    else                 {return (SIZE_1024);}
    00278
    00279 }
    00280
    00288 void host_disable_all_pipe(void)
    00289 {
    00290 U8 i;
    00291    for (i=0;i<7;i++)
    00292    {
    00293       Host_reset_pipe(i);
    00294       Host_select_pipe(i);
    00295       Host_unallocate_memory();
    00296       Host_disable_pipe();
    00297    }
    00298 }
    00299
    00309 U8 usb_get_nb_pipe_interrupt(void)
    00310 {
    00311 U8 interrupt_flags;
    00312 U8 i;
    00313
    00314    interrupt_flags = Host_get_pipe_interrupt();
    00315    for(i=0;i< MAX_EP_NB;i++)
    00316    {
    00317       if (interrupt_flags & (1<<i))
    00318       {
    00319          return (i);
    00320       }
    00321    }
    00322    // This return should never occurs ....
    00323    return MAX_EP_NB+1;
    00324 }
    00325
    00326
    00327 #endif   // USB_HOST_FEATURE == ENABLED
    00328
    00329