lpc24xx_enet.c

NXP LPC系列AMR7的开发程序源码（LCD

/*************************************************************************
 *
 *    Used with ICCARM and AARM.
 *
 *    (c) Copyright IAR Systems 2007
 *
 *    File name   : LPC24xx_enet.c
 *    Description : MAC/DMA Controller with DMA (ENET) driver
 *
 *    History :
 *    1. Date        : September 17, 2007
 *       Author      : Stanimir Bonev
 *       Description : Create
 *
 *    $Revision: 18137 $
 **************************************************************************/
#include "LPC24xx_enet.h"

#pragma segment="EMAC_DMA_RAM"

#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=4
__no_init EnetDmaRxDesc_t EnetDmaRx[ENET_DMA_DESC_NUMB];
#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=8
__no_init EnetDmaRxStatus_t EnetDmaRxSta[ENET_DMA_DESC_NUMB];
#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=4
__no_init Int8U RxBuff0[EMAC_MAX_PACKET_SIZE];
#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=4
__no_init Int8U RxBuff1[EMAC_MAX_PACKET_SIZE];


#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=4
__no_init EnetDmaTxDesc_t EnetDmaTx[ENET_DMA_DESC_NUMB];
#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=4
__no_init EnetDmaTxStatus_t EnetDmaTxSta[ENET_DMA_DESC_NUMB];
#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=4
__no_init Int8U TxBuff0[EMAC_MAX_PACKET_SIZE];
#pragma location="EMAC_DMA_RAM"
#pragma data_alignment=4
__no_init Int8U TxBuff1[EMAC_MAX_PACKET_SIZE];

static Int8U PhyAddr = 1;
/*************************************************************************
 * Function Name:
 * Parameters: None
 *
 * Return: Boolean
 *
 * Description: Init  MAC/DMA Controller
 *
 *************************************************************************/
Boolean tapdev_init(void)
{
  Int32U Reg,to;
static volatile Int32U Tst;

  // clk enable
  PCONP_bit.PCENET = 1;
  POWERDOWN_bit.POWERDOWN = 0;

  // Pins assignment
  //------------------------------------------------------
  // Write to PINSEL2/3 to select the PHY functions on P1[17:0]
  // P1.6, ENET-TX_CLK, has to be set for Rev '-' devices and it
  // must not be set for Rev 'A