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[/] [usb_fpga_1_11/] [trunk/] [examples/] [usb-fpga-1.15/] [1.15d/] [lightshow/] [avr/] [lightshow.c] - Rev 7
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/*! lightshow -- lightshow on Experimental Board 1.10 Copyright (C) 2009-2010 ZTEX e.K. 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; } }
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