--- /dev/null
+/**
+ * \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 */
+
--- /dev/null
+/**
+ * \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 */
projects / bertos.git / commitdiff