mirror of
https://github.com/markqvist/OpenModem.git
synced 2024-12-13 01:44:32 -05:00
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/**
|
|
* \file
|
|
* <!--
|
|
* This file is part of BeRTOS.
|
|
*
|
|
* Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* As a special exception, you may use this file as part of a free software
|
|
* library without restriction. Specifically, if other files instantiate
|
|
* templates or use macros or inline functions from this file, or you compile
|
|
* this file and link it with other files to produce an executable, this
|
|
* file does not by itself cause the resulting executable to be covered by
|
|
* the GNU General Public License. This exception does not however
|
|
* invalidate any other reasons why the executable file might be covered by
|
|
* the GNU General Public License.
|
|
*
|
|
* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
|
|
*
|
|
* -->
|
|
*
|
|
* \author Francesco Sacchi <batt@develer.com>
|
|
*
|
|
* \brief Low-level timer module for NXP LPC2xxx (interface).
|
|
*/
|
|
|
|
#ifndef DRV_LPC2_TIMER_H
|
|
#define DRV_LPC2_TIMER_H
|
|
|
|
#include <hw/hw_cpufreq.h> /* CPU_FREQ */
|
|
|
|
#include "cfg/cfg_timer.h" /* CONFIG_TIMER */
|
|
#include <cfg/compiler.h> /* uint8_t */
|
|
#include <cfg/macros.h> /* BV */
|
|
|
|
#include <io/lpc23xx.h>
|
|
|
|
/**
|
|
* \name Values for CONFIG_TIMER.
|
|
*
|
|
* Select which hardware timer interrupt to use for system clock and softtimers.
|
|
*
|
|
* $WIZ$ timer_select = "TIMER0_COMPARE0", "TIMER_DEFAULT"
|
|
*/
|
|
#define TIMER0_COMPARE0 0 ///< System timer on Timer0 Compare match0
|
|
|
|
#define TIMER_DEFAULT TIMER0_COMPARE0 ///< Default system timer
|
|
|
|
/*
|
|
* Hardware dependent timer initialization.
|
|
*/
|
|
#if (CONFIG_TIMER == TIMER0_COMPARE0)
|
|
ISR_PROTO_CONTEXT_SWITCH(timer_handler);
|
|
#define DEFINE_TIMER_ISR DECLARE_ISR_CONTEXT_SWITCH(timer_handler)
|
|
|
|
#define TIMER_TICKS_PER_SEC 1000
|
|
#define TIMER_HW_CNT (CPU_FREQ / TIMER_TICKS_PER_SEC - 1)
|
|
|
|
/** Frequency of the hardware high-precision timer. */
|
|
#define TIMER_HW_HPTICKS_PER_SEC (CPU_FREQ)
|
|
|
|
/** Type of time expressed in ticks of the hardware high-precision timer */
|
|
typedef uint32_t hptime_t;
|
|
#define SIZEOF_HPTIME_T 4
|
|
|
|
INLINE void timer_hw_irq(void)
|
|
{
|
|
/* Reset The match0 irq flag */
|
|
T0IR = 0x01;
|
|
/* Signal the VIC we have completed the ISR */
|
|
VICVectAddr = 0;
|
|
}
|
|
|
|
INLINE bool timer_hw_triggered(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
INLINE hptime_t timer_hw_hpread(void)
|
|
{
|
|
return T0TC;
|
|
}
|
|
|
|
#else
|
|
|
|
#error Unimplemented value for CONFIG_TIMER
|
|
#endif /* CONFIG_TIMER */
|
|
|
|
void timer_hw_init(void);
|
|
|
|
|
|
#endif /* DRV_LPC2_TIMER_H */
|