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csantifort |
/*----------------------------------------------------------------
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// //
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// boot-loader-ethmac.c //
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// //
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// This file is part of the Amber project //
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// http://www.opencores.org/project,amber //
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// //
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// Description //
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// The main functions for the boot loader application. This //
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// application is embedded in the FPGA's SRAM and is used //
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// to load larger applications into the DDR3 memory on //
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// the development board. //
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// //
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// Author(s): //
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// - Conor Santifort, csantifort.amber@gmail.com //
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// //
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//////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2011 Authors and OPENCORES.ORG //
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// //
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// This source file may be used and distributed without //
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// restriction provided that this copyright statement is not //
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// removed from the file and that any derivative work contains //
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// the original copyright notice and the associated disclaimer. //
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// //
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// This source file is free software; you can redistribute it //
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// and/or modify it under the terms of the GNU Lesser General //
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// Public License as published by the Free Software Foundation; //
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// either version 2.1 of the License, or (at your option) any //
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// later version. //
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// //
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// This source is distributed in the hope that it will be //
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// useful, but WITHOUT ANY WARRANTY; without even the implied //
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// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
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// PURPOSE. See the GNU Lesser General Public License for more //
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// details. //
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// //
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// You should have received a copy of the GNU Lesser General //
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// Public License along with this source; if not, download it //
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// from http://www.opencores.org/lgpl.shtml //
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// //
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----------------------------------------------------------------*/
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#include "amber_registers.h"
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#include "timer.h"
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#include "led.h"
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/* global variables */
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time_t* led_flash_timer_g;
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void init_led()
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{
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/* Turn off all LEDs */
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led_clear();
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/* create some timers */
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led_flash_timer_g = new_timer();
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set_timer(led_flash_timer_g, 500);
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}
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void process_led()
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{
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/* Flash a heartbeat LED */
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if (timer_expired(led_flash_timer_g)) {
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led_flip(0);
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set_timer(led_flash_timer_g, 500);
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}
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}
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/* turn off all leds */
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void led_clear()
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{
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*(unsigned int *) ADR_AMBER_TEST_LED = 0;
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}
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/* led is either 0,1,2 or 3 */
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void led_flip(int led)
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{
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int current_value;
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current_value = *(unsigned int *) ADR_AMBER_TEST_LED;
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*(unsigned int *) ADR_AMBER_TEST_LED = current_value ^ (1<<led);
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}
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/* led is either 0,1,2 or 3 */
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void led_on(int led)
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{
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int current_value;
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current_value = *(unsigned int *) ADR_AMBER_TEST_LED;
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*(unsigned int *) ADR_AMBER_TEST_LED = current_value | (1<<led);
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}
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/* led is either 0,1,2 or 3 */
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void led_off(int led)
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{
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int current_value;
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current_value = *(unsigned int *) ADR_AMBER_TEST_LED;
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*(unsigned int *) ADR_AMBER_TEST_LED = current_value & ~(1<<led);
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}
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/* led is either 0,1,2 or 3 */
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void led_123(int value)
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{
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int current_value;
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current_value = *(unsigned int *) ADR_AMBER_TEST_LED;
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*(unsigned int *) ADR_AMBER_TEST_LED = (current_value & 1) | value<<1;
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}
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