sam7ex256_misc.c

开放源码实时操作系统源码.

/*==========================================================================
//
//      sam7ex256_misc.c
//
//      HAL misc board support code for Olimex SAM7-EX256 board
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2006 Andrew Lunn <[e-mail]>
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    Uwe Kindler
// Contributors: Andrew Lunn, John Eigelaar
// Date:         2006-12-30
// Purpose:      HAL board support
// Description:  Implementations of HAL board interfaces
//
//####DESCRIPTIONEND####
//
//========================================================================*/

#include <pkgconf/system.h>
#include <pkgconf/hal.h>

#include <cyg/hal/hal_io.h>             // IO macros

//
// The development board does not contain any leds but a nokia 320 x 320 
// pixel lcd. We use the backlight of the lcd as a simple 1-bit LED
//
void hal_at91_led (int val)
{
    HAL_ARM_AT91_GPIO_CFG_DIRECTION(AT91_GPIO_PB20, AT91_PIN_OUT);
    HAL_ARM_AT91_GPIO_PUT(AT91_GPIO_PB20, (val & 1));
}

//
// Initialisation of Micrel KS8721 ethernet phy
//
void hal_plf_eth_init(void)
{
   cyg_uint32 stat;

   // Enable the PIOB Clock
   HAL_WRITE_UINT32(AT91_PMC + AT91_PMC_PCER, AT91_PMC_PCER_PIOB);
    
   // PU = Enables PCS_LPBK mode at power-up / reset.
   HAL_ARM_AT91_GPIO_CFG_DIRECTION(AT91_GPIO_PB15, AT91_PIN_IN);
   HAL_ARM_AT91_GPIO_CFG_PULLUP(AT91_GPIO_PB15, AT91_PIN_PULLUP_DISABLE);
   
   // PU = Enables ISOLATE mode at power-up /reset.
   HAL_ARM_AT91_GPIO_CFG_DIRECTION(AT91_GPIO_PB7, AT91_PIN_IN);
   HAL_ARM_AT91_GPIO_CFG_PULLUP(AT91_GPIO_PB7, AT91_PIN_PULLUP_DISABLE);
   
   // PU = Enables RMII mode at power-up / reset
   // TODO: The errata reports that the RMII mode for the SAM7X does not work.
   //      It would probably still be a good idea to use the RMII/MII CDL 
   //      configuration to select the appropriate mode here
   HAL_ARM_AT91_GPIO_CFG_DIRECTION(AT91_GPIO_PB16, AT91_PIN_IN);
   HAL_ARM_AT91_GPIO_CFG_PULLUP(AT91_GPIO_PB16, AT91_PIN_PULLUP_DISABLE);
   
   // PU = Enable RMII_BTB mode at power-up / reset.
   HAL_ARM_AT91_GPIO_CFG_DIRECTION(AT91_GPIO_PB4, AT91_PIN_IN);
   HAL_ARM_AT91_GPIO_CFG_PULLUP(AT91_GPIO_PB4, AT91_PIN_PULLUP_DISABLE);

   // Power Down Mode = 1 = normal operation
   HAL_ARM_AT91_GPIO_CFG_DIRECTION(AT91_GPIO_PB18, AT91_PIN_OUT);
   HAL_ARM_AT91_GPIO_PUT(AT91_GPIO_PB18, 1);

   // All the lines setup correctly. Now do a external reset and let the phy 
   // start up in the correct mode
   HAL_WRITE_UINT32(AT91_RST+AT91_RST_RMR,AT91_RST_RMR_KEY|(1<<0x8));
   HAL_WRITE_UINT32(AT91_RST+AT91_RST_RCR,AT91_RST_RCR_KEY|AT91_RST_RCR_EXTRST);

   do 
   {
     HAL_READ_UINT32(AT91_RST+AT91_RST_RSR,stat);
   } while (!(stat & AT91_RST_RSR_NRST_SET));
}


//--------------------------------------------------------------------------
// EOF sam7ex256_misc.c