/*----------------------------------------------------------------
|
/*----------------------------------------------------------------
|
// //
|
// //
|
// boot-loader-ethmac.c //
|
// boot-loader-ethmac.c //
|
// //
|
// //
|
// This file is part of the Amber project //
|
// This file is part of the Amber project //
|
// http://www.opencores.org/project,amber //
|
// http://www.opencores.org/project,amber //
|
// //
|
// //
|
// Description //
|
// Description //
|
// The main functions for the boot loader application. This //
|
// The main functions for the boot loader application. This //
|
// application is embedded in the FPGA's SRAM and is used //
|
// application is embedded in the FPGA's SRAM and is used //
|
// to load larger applications into the DDR3 memory on //
|
// to load larger applications into the DDR3 memory on //
|
// the development board. //
|
// the development board. //
|
// //
|
// //
|
// Author(s): //
|
// Author(s): //
|
// - Conor Santifort, csantifort.amber@gmail.com //
|
// - Conor Santifort, csantifort.amber@gmail.com //
|
// //
|
// //
|
//////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////
|
// //
|
// //
|
// Copyright (C) 2011 Authors and OPENCORES.ORG //
|
// Copyright (C) 2011 Authors and OPENCORES.ORG //
|
// //
|
// //
|
// This source file may be used and distributed without //
|
// This source file may be used and distributed without //
|
// restriction provided that this copyright statement is not //
|
// restriction provided that this copyright statement is not //
|
// removed from the file and that any derivative work contains //
|
// removed from the file and that any derivative work contains //
|
// the original copyright notice and the associated disclaimer. //
|
// the original copyright notice and the associated disclaimer. //
|
// //
|
// //
|
// This source file is free software; you can redistribute it //
|
// This source file is free software; you can redistribute it //
|
// and/or modify it under the terms of the GNU Lesser General //
|
// and/or modify it under the terms of the GNU Lesser General //
|
// Public License as published by the Free Software Foundation; //
|
// Public License as published by the Free Software Foundation; //
|
// either version 2.1 of the License, or (at your option) any //
|
// either version 2.1 of the License, or (at your option) any //
|
// later version. //
|
// later version. //
|
// //
|
// //
|
// This source is distributed in the hope that it will be //
|
// This source is distributed in the hope that it will be //
|
// useful, but WITHOUT ANY WARRANTY; without even the implied //
|
// useful, but WITHOUT ANY WARRANTY; without even the implied //
|
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
|
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
|
// PURPOSE. See the GNU Lesser General Public License for more //
|
// PURPOSE. See the GNU Lesser General Public License for more //
|
// details. //
|
// details. //
|
// //
|
// //
|
// You should have received a copy of the GNU Lesser General //
|
// You should have received a copy of the GNU Lesser General //
|
// Public License along with this source; if not, download it //
|
// Public License along with this source; if not, download it //
|
// from http://www.opencores.org/lgpl.shtml //
|
// from http://www.opencores.org/lgpl.shtml //
|
// //
|
// //
|
----------------------------------------------------------------*/
|
----------------------------------------------------------------*/
|
|
|
#include "amber_registers.h"
|
#include "amber_registers.h"
|
#include "utilities.h"
|
#include "utilities.h"
|
#include "timer.h"
|
#include "timer.h"
|
|
|
|
|
/* Global variable for the current time */
|
/* Global variable for the current time */
|
time_t* current_time_g;
|
time_t* current_time_g;
|
|
|
|
|
time_t* init_timer()
|
/* Create a timer object */
|
|
time_t* new_timer()
|
{
|
{
|
time_t* timer;
|
time_t* timer;
|
timer= malloc(sizeof(time_t));
|
timer= malloc(sizeof(time_t));
|
timer->milliseconds = 0;
|
timer->milliseconds = 0;
|
timer->seconds = 0;
|
timer->seconds = 0;
|
return timer;
|
return timer;
|
}
|
}
|
|
|
|
|
|
|
/*Initialize a global variable that keeps
|
/*Initialize a global variable that keeps
|
track of the current up time. Timers are
|
track of the current up time. Timers are
|
compared against this running value.
|
compared against this running value.
|
*/
|
*/
|
void init_current_time()
|
void init_timer()
|
{
|
{
|
|
/* Initialize the current time object */
|
|
current_time_g = new_timer();
|
|
|
/* Configure timer 0 */
|
/* Configure timer 0 */
|
/* Counts down from this value and generates an interrupt every 1/100 seconds */
|
/* Counts down from this value and generates an interrupt every 1/100 seconds */
|
*(unsigned int *) ( ADR_AMBER_TM_TIMER0_LOAD ) = 1562; // 16-bit, x 256
|
*(unsigned int *) ( ADR_AMBER_TM_TIMER0_LOAD ) = 1562; // 16-bit, x 256
|
*(unsigned int *) ( ADR_AMBER_TM_TIMER0_CTRL ) = 0xc8; // enable[7], periodic[6],
|
*(unsigned int *) ( ADR_AMBER_TM_TIMER0_CTRL ) = 0xc8; // enable[7], periodic[6],
|
|
|
/* Enable timer 0 interrupt */
|
/* Enable timer 0 interrupt */
|
*(unsigned int *) ( ADR_AMBER_IC_IRQ0_ENABLESET ) = 0x020;
|
*(unsigned int *) ( ADR_AMBER_IC_IRQ0_ENABLESET ) = 0x020;
|
|
}
|
|
|
current_time_g = malloc(sizeof(time_t));
|
|
current_time_g->milliseconds = 0;
|
/* Set the timer to current time plus a number of milliseconds */
|
current_time_g->seconds = 0;
|
void set_timer (time_t* timer, int milliseconds)
|
|
{
|
|
int seconds = _div(milliseconds, 1000);
|
|
int mseconds = milliseconds - seconds*1000; /* milliseconds % 1000 */
|
|
|
|
if (current_time_g->milliseconds >= (1000 - mseconds)) {
|
|
timer->seconds = current_time_g->seconds + 1;
|
|
timer->milliseconds = current_time_g->milliseconds + mseconds - 1000;
|
|
}
|
|
else {
|
|
timer->seconds = current_time_g->seconds;
|
|
timer->milliseconds = current_time_g->milliseconds + mseconds;
|
}
|
}
|
|
|
|
timer->seconds += seconds;
|
|
}
|
|
|
|
|
void timer_interrupt()
|
void timer_interrupt()
|
{
|
{
|
/* Clear timer 0 interrupt in timer */
|
/* Clear timer 0 interrupt in timer */
|
*(unsigned int *) ( ADR_AMBER_TM_TIMER0_CLR ) = 1;
|
*(unsigned int *) ( ADR_AMBER_TM_TIMER0_CLR ) = 1;
|
|
|
/* Disable timer 0 interrupt in interrupt controller */
|
/* Disable timer 0 interrupt in interrupt controller */
|
*(unsigned int *) ( ADR_AMBER_IC_IRQ0_ENABLECLR ) = 0x020;
|
*(unsigned int *) ( ADR_AMBER_IC_IRQ0_ENABLECLR ) = 0x020;
|
|
|
/* Update the global current_time variable */
|
/* Update the global current_time variable */
|
if (current_time_g->milliseconds == 990) {
|
if (current_time_g->milliseconds == 990) {
|
current_time_g->milliseconds = 0;
|
current_time_g->milliseconds = 0;
|
current_time_g->seconds++;
|
current_time_g->seconds++;
|
}
|
}
|
else {
|
else {
|
current_time_g->milliseconds+=10;
|
current_time_g->milliseconds+=10;
|
}
|
}
|
|
|
/* Enable timer 0 interrupt in interrupt controller */
|
/* Enable timer 0 interrupt in interrupt controller */
|
*(unsigned int *) ( ADR_AMBER_IC_IRQ0_ENABLESET ) = 0x020;
|
*(unsigned int *) ( ADR_AMBER_IC_IRQ0_ENABLESET ) = 0x020;
|
}
|
}
|
|
|
|
|
/* Return true if timer has expired */
|
/* Return true if timer has expired */
|
int timer_expired(time_t * expiry_time)
|
int timer_expired(time_t * expiry_time)
|
{
|
{
|
if (!expiry_time->seconds && !expiry_time->milliseconds)
|
if (!expiry_time->seconds && !expiry_time->milliseconds)
|
/* timer is not set */
|
/* timer is not set */
|
return 0;
|
return 0;
|
else if (expiry_time->seconds < current_time_g->seconds)
|
else if (expiry_time->seconds < current_time_g->seconds)
|
return 1;
|
return 1;
|
else if ((expiry_time->seconds == current_time_g->seconds) &&
|
else if ((expiry_time->seconds == current_time_g->seconds) &&
|
(expiry_time->milliseconds < current_time_g->milliseconds))
|
(expiry_time->milliseconds < current_time_g->milliseconds))
|
return 1;
|
return 1;
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/* Set the timer to current time plus 5 seconds */
|
|
void set_timer (time_t* timer, int milliseconds)
|
|
{
|
|
int seconds = _div(milliseconds, 1000);
|
|
int mseconds = milliseconds - seconds*1000; /* milliseconds % 1000 */
|
|
|
|
|
|
if (current_time_g->milliseconds >= (1000 - mseconds)) {
|
|
timer->seconds = current_time_g->seconds + 1;
|
|
timer->milliseconds = current_time_g->milliseconds + mseconds - 1000;
|
|
}
|
|
else {
|
|
timer->seconds = current_time_g->seconds;
|
|
timer->milliseconds = current_time_g->milliseconds + mseconds;
|
|
}
|
|
|
|
timer->seconds += seconds;
|
|
}
|
|
|
|
|
|
