summaryrefslogtreecommitdiff
path: root/nuttx/arch/arm/src/sam3u/sam3u_timerisr.c
diff options
context:
space:
mode:
authorGregory Nutt <gnutt@nuttx.org>2013-06-02 13:04:40 -0600
committerGregory Nutt <gnutt@nuttx.org>2013-06-02 13:04:40 -0600
commit9c0f7e4217cf195b2f83175b0014e273fbc805da (patch)
tree46f769b6188d65d2f3471b9fe7bdae2676162f56 /nuttx/arch/arm/src/sam3u/sam3u_timerisr.c
parent872bef7d41462d36b81ddc8de82a2cde18eaf096 (diff)
downloadpx4-nuttx-9c0f7e4217cf195b2f83175b0014e273fbc805da.tar.gz
px4-nuttx-9c0f7e4217cf195b2f83175b0014e273fbc805da.tar.bz2
px4-nuttx-9c0f7e4217cf195b2f83175b0014e273fbc805da.zip
Eliminated sam3u_internal.h. Use separate header files instead. More renaming from sam3u_ to sam_ to make room in the namespce for the sam4l_
Diffstat (limited to 'nuttx/arch/arm/src/sam3u/sam3u_timerisr.c')
-rw-r--r--nuttx/arch/arm/src/sam3u/sam3u_timerisr.c162
1 files changed, 0 insertions, 162 deletions
diff --git a/nuttx/arch/arm/src/sam3u/sam3u_timerisr.c b/nuttx/arch/arm/src/sam3u/sam3u_timerisr.c
deleted file mode 100644
index cddd1cd05..000000000
--- a/nuttx/arch/arm/src/sam3u/sam3u_timerisr.c
+++ /dev/null
@@ -1,162 +0,0 @@
-/****************************************************************************
- * arch/arm/src/sam3u/sam3u_timerisr.c
- *
- * Copyright (C) 2010, 2013 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <stdint.h>
-#include <time.h>
-#include <debug.h>
-#include <nuttx/arch.h>
-#include <arch/board/board.h>
-
-#include "nvic.h"
-#include "clock_internal.h"
-#include "up_internal.h"
-#include "up_arch.h"
-
-#include "chip.h"
-#include "sam3u_internal.h"
-
-/****************************************************************************
- * Definitions
- ****************************************************************************/
-
-/* The desired timer interrupt frequency is provided by the definition
- * CLK_TCK (see include/time.h). CLK_TCK defines the desired number of
- * system clock ticks per second. That value is a user configurable setting
- * that defaults to 100 (100 ticks per second = 10 MS interval).
- *
- * The SAM3U feeds the Cortex System Timer (SysTick) with the MCK clock or
- * the MCK clock divided by 8, configurable with the CLKSOURCE bit in the
- * SysTick Control and Status register.
- */
-
-#undef CONFIG_SAM34_SYSTICK_HCLKd8 /* Power up default is MCK, not MCK/8 */
-
-#if CONFIG_SAM34_SYSTICK_HCLKd8
-# define SYSTICK_RELOAD ((SAM_MCK_FREQUENCY / 8 / CLK_TCK) - 1)
-#else
-# define SYSTICK_RELOAD ((SAM_MCK_FREQUENCY / CLK_TCK) - 1)
-#endif
-
-/* The size of the reload field is 24 bits. Verify that the reload value
- * will fit in the reload register.
- */
-
-#if SYSTICK_RELOAD > 0x00ffffff
-# error SYSTICK_RELOAD exceeds the range of the RELOAD register
-#endif
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
-/****************************************************************************
- * Private Function Prototypes
- ****************************************************************************/
-
-/****************************************************************************
- * Global Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Function: up_timerisr
- *
- * Description:
- * The timer ISR will perform a variety of services for various portions
- * of the systems.
- *
- ****************************************************************************/
-
-int up_timerisr(int irq, uint32_t *regs)
-{
- /* Process timer interrupt */
-
- sched_process_timer();
- return 0;
-}
-
-/****************************************************************************
- * Function: up_timerinit
- *
- * Description:
- * This function is called during start-up to initialize
- * the timer interrupt.
- *
- ****************************************************************************/
-
-void up_timerinit(void)
-{
- uint32_t regval;
-
- /* Set the SysTick interrupt to the default priority */
-
- regval = getreg32(NVIC_SYSH12_15_PRIORITY);
- regval &= ~NVIC_SYSH_PRIORITY_PR15_MASK;
- regval |= (NVIC_SYSH_PRIORITY_DEFAULT << NVIC_SYSH_PRIORITY_PR15_SHIFT);
- putreg32(regval, NVIC_SYSH12_15_PRIORITY);
-
- /* Make sure that the SYSTICK clock source is set correctly */
-
-#if 0 /* Does not work. Comes up with HCLK source and I can't change it */
- regval = getreg32(NVIC_SYSTICK_CTRL);
-#if CONFIG_SAM34_SYSTICK_HCLKd8
- regval &= ~NVIC_SYSTICK_CTRL_CLKSOURCE;
-#else
- regval |= NVIC_SYSTICK_CTRL_CLKSOURCE;
-#endif
- putreg32(regval, NVIC_SYSTICK_CTRL);
-#endif
-
- /* Configure SysTick to interrupt at the requested rate */
-
- putreg32(SYSTICK_RELOAD, NVIC_SYSTICK_RELOAD);
-
- /* Attach the timer interrupt vector */
-
- (void)irq_attach(SAM_IRQ_SYSTICK, (xcpt_t)up_timerisr);
-
- /* Enable SysTick interrupts */
-
- putreg32((NVIC_SYSTICK_CTRL_CLKSOURCE|NVIC_SYSTICK_CTRL_TICKINT|NVIC_SYSTICK_CTRL_ENABLE), NVIC_SYSTICK_CTRL);
-
- /* And enable the timer interrupt */
-
- up_enable_irq(SAM_IRQ_SYSTICK);
-}