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/*
* USRP - Universal Software Radio Peripheral
*
* Copyright (C) 2003 Free Software Foundation, Inc.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA
*/
/*
* common code for USRP
*/
#include "usrp_common.h"
void init_board (void);
void
init_usrp (void)
{
CPUCS = bmCLKSPD1; // CPU runs @ 48 MHz
CKCON = 0; // MOVX takes 2 cycles
// IFCLK is generated internally and runs at 48 MHz; GPIF "master mode"
IFCONFIG = bmIFCLKSRC | bm3048MHZ | bmIFCLKOE | bmIFCLKPOL | bmIFGPIF;
SYNCDELAY;
// configure IO ports (B and D are used by GPIF)
IOA = bmPORT_A_INITIAL; // Port A initial state
OEA = bmPORT_A_OUTPUTS; // Port A direction register
IOC = bmPORT_C_INITIAL; // Port C initial state
OEC = bmPORT_C_OUTPUTS; // Port C direction register
IOE = bmPORT_E_INITIAL; // Port E initial state
OEE = bmPORT_E_OUTPUTS; // Port E direction register
// REVCTL = bmDYN_OUT | bmENH_PKT; // highly recommended by docs
// SYNCDELAY;
// configure end points
EP1OUTCFG = bmVALID | bmBULK; SYNCDELAY;
EP1INCFG = bmVALID | bmBULK | bmIN; SYNCDELAY;
EP2CFG = bmVALID | bmBULK | bmQUADBUF; SYNCDELAY; // 512 quad bulk OUT
EP4CFG = 0; SYNCDELAY; // disabled
EP6CFG = bmVALID | bmBULK | bmQUADBUF | bmIN; SYNCDELAY; // 512 quad bulk IN
EP8CFG = 0; SYNCDELAY; // disabled
// reset FIFOs
FIFORESET = bmNAKALL; SYNCDELAY;
FIFORESET = 2; SYNCDELAY;
// FIFORESET = 4; SYNCDELAY;
FIFORESET = 6; SYNCDELAY;
// FIFORESET = 8; SYNCDELAY;
FIFORESET = 0; SYNCDELAY;
// configure end point FIFOs
// let core see 0 to 1 transistion of autoout bit
EP2FIFOCFG = bmWORDWIDE; SYNCDELAY;
EP2FIFOCFG = bmAUTOOUT | bmWORDWIDE; SYNCDELAY;
EP6FIFOCFG = bmAUTOIN | bmWORDWIDE; SYNCDELAY;
// prime the pump
#if 0
EP2BCL = 0x80; SYNCDELAY;
EP2BCL = 0x80; SYNCDELAY;
EP2BCL = 0x80; SYNCDELAY;
EP2BCL = 0x80; SYNCDELAY;
#endif
EP0BCH = 0; SYNCDELAY;
// arm EP1OUT so we can receive "out" packets (TRM pg 8-8)
EP1OUTBC = 0; SYNCDELAY;
EP2GPIFFLGSEL = 0x01; SYNCDELAY; // For EP2OUT, GPIF uses EF flag
EP6GPIFFLGSEL = 0x02; SYNCDELAY; // For EP6IN, GPIF uses FF flag
// set autoin length for EP6
// FIXME should be f(enumeration)
EP6AUTOINLENH = (512) >> 8; SYNCDELAY; // this is the length for high speed
EP6AUTOINLENL = (512) & 0xff; SYNCDELAY;
init_board ();
}
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