037c9ea0a4
Summary The naming standard at https://cwiki.apache.org/confluence/display/NUTTX/Naming+FAQ requires that all MCU-private files begin with the name of the architecture, not up_. This PR addresses only these name changes for the up_*.h files. There are only three, but almost 1680 files that include them: up_arch.h up_internal.h up_vfork.h The only change to the files is from including up_arch.h to arm_arch.h (for example). The entire job required to be compatible with that Naming Convention will also require changing the naming of the up_() functions that are used only within arch/arm and board/arm. Impact There should be not impact of this change (other that one step toward more consistent naming). Testing stm32f4discovery:netnsh
124 lines
4.4 KiB
C
124 lines
4.4 KiB
C
/****************************************************************************
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* c5471/c5471_timerisr.c
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*
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* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include "chip.h"
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#include "arm_arch.h"
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#include "clock/clock.h"
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#include "arm_internal.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* We want the general purpose timer running at the rate
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* USEC_PER_TICK. The C5471 clock is 47.5MHz and we're using
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* a timer PTV value of 3 (3 == divide incoming frequency by
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* 16) which then yields a 16 bitCLKS_PER_INT value
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* of 29687.
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*
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* 47500000 / 16 = 2968750 clocks/sec
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* 2968750 / 100 = 29687 clocks/ 100Hz interrupt
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*
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*/
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#define CLKS_PER_INT 29687
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#define CLKS_PER_INT_SHIFT 5
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#define AR 0x00000010
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#define ST 0x00000008
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#define PTV 0x00000003
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Function: c5471_timerisr
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*
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* Description:
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* The timer ISR will perform a variety of services for
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* various portions of the systems.
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*
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****************************************************************************/
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static int c5471_timerisr(int irq, uint32_t *regs, FAR void *arg)
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{
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/* Process timer interrupt */
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nxsched_process_timer();
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return 0;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: up_timer_initialize
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*
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* Description:
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* This function is called during start-up to initialize
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* the timer interrupt.
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*
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****************************************************************************/
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void up_timer_initialize(void)
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{
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uint32_t val;
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up_disable_irq(C5471_IRQ_SYSTIMER);
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/* Start the general purpose timer running in auto-reload mode
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* so that an interrupt is generated at the rate USEC_PER_TICK.
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*/
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val = ((CLKS_PER_INT-1) << CLKS_PER_INT_SHIFT) | AR | ST | PTV;
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putreg32(val, C5471_TIMER2_CTRL);
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/* Attach and enable the timer interrupt */
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irq_attach(C5471_IRQ_SYSTIMER, (xcpt_t)c5471_timerisr, NULL);
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up_enable_irq(C5471_IRQ_SYSTIMER);
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}
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