diff options
Diffstat (limited to 'firmware/usbn2mc.c')
| -rw-r--r-- | firmware/usbn2mc.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/firmware/usbn2mc.c b/firmware/usbn2mc.c new file mode 100644 index 0000000..d9b0fdd --- /dev/null +++ b/firmware/usbn2mc.c @@ -0,0 +1,153 @@ +/* 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); +} |