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/* usbn960x.c
* Copyright (C) 2005 Benedikt Sauter
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include "usbn2mc.h"
#include "uart.h"
//*******************************************************************
// add own vendor requests
// ********************************************************************
// decode your own vendor requests
void
USBNDecodeVendorRequest (DeviceRequest * req)
{
#if 0
//SendHex(req->bRequest); // decode request code
SendHex (req->wLength); // decode request code
USBNWrite (RXC0, RX_EN);
USBNRead (RXD0);
USBNRead (RXD0);
//USBNWrite(TXC0,FLUSH);
//USBNWrite(TXD0,0x24);
//USBNWrite(TXD0,0x25);
#endif
}
void
USBNDecodeClassRequest (DeviceRequest * req)
{
#if 0
//SendHex(req->bRequest); // decode request code
SendHex (req->wLength); // decode request code
USBNWrite (RXC0, RX_EN);
USBNRead (RXD0);
USBNRead (RXD0);
#endif
}
// ********************************************************************
// This subroutine handles the communication with usbn9604
// ********************************************************************
// Read data from usbn96x register
void
USBNInitMC (void)
{
// interrupt on INT4 pin falling edge (atmega128)
//EICRB = (0 << ISC41) | (1 << ISC40);
EICRB = (1 << ISC40);
// interrupts on!
//EIMSK = (1 << INT4); // allow extern irq4
EIMSK = (1 << INT4);
USB_CTRL_DDR |= (1 << PF_A0) | (1 << PF_RD) | (1 << PF_WR); // output (a0,rd,wr)
//USB_CTRL_PORT |= ((1 << PF_RD) | (1 << PF_WR) & ~(PF_A0));
USB_CTRL_PORT |= ((1 << PF_RD) | (1 << PF_WR));
USB_CS_DDR |= (1 << PF_CS);
USB_CS_PORT |= (1 << PF_CS);
sei ();
}
unsigned char
USBNRead (unsigned char Adr)
{
USB_DATA_DDR = 0xff; // set for output
USB_DATA_OUT = Adr; // load address
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_WR) | (1 << PF_A0); // strobe the CS, WR, and A0 pins
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_WR) | (1 << PF_A0); // strobe the CS, WR, and A0 pins
// USB_CS_PORT ^=(1<<PF_CS);
// USB_CTRL_PORT ^= (1<<PF_WR) |(1<<PF_A0);
asm ("nop"); // pause for data to get to bus
USB_DATA_DDR = 0x00; // set PortD for input
return (USBNBurstRead ()); // get data off the bus
}
unsigned char
USBNBurstRead (void)
{
unsigned char result;
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_RD);
asm ("nop"); // pause for data to get to bus
asm ("nop");
result = USB_DATA_IN;
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_RD);
return result;
}
// Write data to usbn96x register
void
USBNWrite (unsigned char Adr, unsigned char Data)
{
USB_DATA_OUT = Adr; // put the address on the bus
USB_DATA_DDR = 0xff; // set for output
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_WR) | (1 << PF_A0);
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_WR) | (1 << PF_A0);
USBNBurstWrite (Data);
}
void
USBNBurstWrite (unsigned char Data)
{
USB_DATA_OUT = Data; // put data on the bus
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_WR);
USB_CS_PORT ^= (1 << PF_CS);
USB_CTRL_PORT ^= (1 << PF_WR);
}
void
USBNDebug (char *msg)
{
// UARTWrite (msg);
}
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