Subversion Repositories usb_fpga_2_13

/*!

   lightshow -- lightshow on Experimental Board 1.10

   Copyright (C) 2009-2014 ZTEX GmbH

   http://www.ztex.de

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License version 3 as

   published by the Free Software Foundation.

   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, see http://www.gnu.org/licenses/.

!*/

#include <avr/io.h>

#define F_CPU 32000000UL

#include <util/delay.h>

typedef uint8_t byte;

int main(void)

{

    // enable 32.768 kHz, 32 MHz, 2 Mhz clocks

    asm volatile (

        "ldi r24,0xd8" "\n\t"

        "ldi r23,7" "\n\t"

        "out 0x34,r24" "\n\t"

        "sts 0x50,r23"

        ::: "r24", "r23"

    );

    // wait until clocks are ready

    while ( (OSC.STATUS & 7) != 7 ) { }

    // enable run time configuration of 32 MHz and 2 MHz clocks; select 32 MHz clock as system clock

    asm volatile (

        "ldi r24,0xd8" "\n\t"

        "ldi r23,1" "\n\t"

        "out 0x34,r24" "\n\t"

        "sts 0x60,r23" "\n\t"

        "out 0x34,r24" "\n\t"

        "sts 0x68,r23" "\n\t"

        "out 0x34,r24" "\n\t"

        "sts 0x40,r23"

        ::: "r24", "r23"

    );

    // disable JTAG at portb

    asm volatile (

        "ldi r24,0xd8" "\n\t"

        "ldi r23,1" "\n\t"

        "out 0x34,r24" "\n\t"

        "sts 0x96,r23" "\n\t"

        ::: "r24", "r23"

    );

    // clock output to PD7

    PORTCFG.CLKEVOUT = 2;

    PORTD.DIR = 128;

    PORTJ.DIR = 0;       // input: 4 LED's

    PORTH.DIR = 0;       // input: 8 LED's

    PORTD.DIR |= 15;    // output: 4 LED's

    PORTF.DIR = 255;    // output: 8 LED's

    while (1) {

        PORTD.OUT = PORTJ.IN;

        PORTF.OUT = PORTH.IN;

    }

}