Output (MDIO) Module User's Guide

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Architecture

Example 4. EMAC Control Module Initialization Code

Uint32 tmpval ;

/* Disable all the EMAC/MDIO interrupts in the control module */

EmacControlRegs->CONTROL.C_RX_EN = 0;

EmacControlRegs->CONTROL.C_TX_EN = 0;

EmacControlRegs->CONTROL.C_RX_THRESH_EN = 0;

EmacControlRegs->CONTROL.C_MISC_EN = 0;

/* Wait about 100 cycles */

for( I=0; i<5; I++ )

tmpval = ECTL_REGS->EWCTL ;

#ifdef INTT_PACING

/* Set the control related to pacing of TX and RX interrupts */

EmacControlRegs->INTR_COUNT->C_RX_IMAX = 0x4; // 4 RX intt/ms

EmacControlRegs->INTR_COUNT->C_TX_IMAX = 0x4; // 4 TX intt/ms

EmacControlRegs->INT_CONTROL = 0x30000; //bit16,bit17 for enabling TX and Rx intt pacing.

EmacControlRegs->INT_CONTROL |= 0x258; // 600 clocks of 150MHz in 4us time

#endif

/* Initialize MDIO and EMAC Module */

[Discussed later in this document]

/* Enable all the EMAC/MDIO interrupts in the control module */

EmacControlRegs->CONTROL.C_RX_EN = 0xff;

EmacControlRegs->CONTROL.C_TX_EN = 0xff;

EmacControlRegs->CONTROL.C_RX_THRESH_EN = 0xff;

EmacControlRegs->CONTROL.C_MISC_EN = 0xf;

SPRUEQ6 – December 2007 Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO) 53

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