/** * \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 LPC2xxx (implementation). * * notest:arm */ #include "cfg/cfg_timer.h" #include <cfg/macros.h> // BV() #include <cfg/debug.h> // BV() #include <drv/vic_lpc2.h> #include <io/lpc23xx.h> #include "timer_lpc2.h" /** HW dependent timer initialization */ #if (CONFIG_TIMER == TIMER0_COMPARE0) #define TIMER0_ID 4 void timer_hw_init(void) { /* Power on timer0 */ PCONP |= BV(1); /* Set TIMER0 clk to CPU_FREQ */ PCLKSEL0 &= ~0x0C; PCLKSEL0 |= 0x04; /* reset prescaler counter */ T0PR = 0; /* Set match register 0 */ T0MR0 = TIMER_HW_CNT; /* IRQ and reset counter on compare match 0 */ T0MCR &= ~0x03; T0MCR |= 0x03; /* Reset timer0 counter and prescaler */ T0TCR = 0x02; vic_setVector(TIMER0_ID, timer_handler); vic_enable(TIMER0_ID); /* Start timer0 */ T0TCR = 0x01; } #else #error Unimplemented value for CONFIG_TIMER #endif /* CONFIG_TIMER */