a9d713bbcc
Squashed commit of the following:
arch/arm/src/samd5e5: Clean-up EIC logic.
arch/arm/src/samd5e5: Fix some compilation issues; Still issues with the EIC logic from samd2x.
arch/arm/src/samd5e5: Fix some compilation issues; bring in some EIC logic from samd2x.
arch/arm/src/samd5e5: Add NVMCTRL header file, fix some compiler problems, misc. clean-up.
configs/metro-m4: Add LED support.
arch/arm/src/samd5e5: Bring in SAML21 clock configuration. This is a WIP; it cannot possible even compile yet.
arch/arm/src/samd5e5: Leverage Cortex-M4 interrupt and SysTick logic from the SAM3/4.
arch/arm/src/samd5e5: Add SERCOM utility function.
arch/arm/src/samd5e5: Bring all SERCOM USART logic from SAMD2L2 to SAMD5E5. This is a brute coy with nothing more than more that name changes and extension from 5 to 7 SERCOMs.
arch/arm/src/samd5e5: Add sam_config.h header file
arch/arm/src/samd5e5/: Add Generic Clock (GCLK) utility functions.
arch/arm/src/samd5e5: Add EVSYS register definition file
arch/arm/src/samd5e5 and configs/metro-m4: Use SERCOM3 for the Arduino serial shield as console.
arch/arm/src/samd5e5/chip: Add SERCOM USART, SPI, I2C master, and slave register defintions header files
arch/arm/src/samd5e5/chip: Add AES, PM, TRNG, and WDT header files.
arch/arm/src/samd5e5/chip: Add pin multiplexing header files.
Various fixes to configuration system; fix metro-m4/nsh defconfig file.
configs/metro-m4: Add initial support for the Adafruit Metro M4 board.
arch/arm/src/samd5e5: Add peripheral clock helpers.
arch/arm/src/samd5e5/chip: Add PAC register definition header file. Fix some errors in the memory map header file.
arch/arm/src/samd5e5: Add chip.h headerf file.
arch/arm/src/samd5e5: Add PORT register definitions and support from SAML21.
arch/arm/include/samd5e5: Add interrupt vector definitions.
arch/arm/src/samd5e5: Add some boilerplate files. Correct some typos.
arch/arm/src/samd5e5/chip/sam_eic.h: Add EIC register definitions.
arch/arm/src/samd5e5/chip: Add OSC32KCTRL and OSCCTRL register definitions.
arch/arm/src/samd5e5/chip: Add GCLK, MCLK, and RSTC header files.
arch/arm/src/samd5e5/chip/sam_cmcc.h: Add CMCC register definitions
arch/arm/src/samd5e5/chip/sam_supc.h: Add SUPC header file.
arch/arm/src/samd5e5: Add start-up logic.
arch/arm/src/samd5e5: Add Make.defs file
arch/arm/src/samd5e5/chip: Add memory map header file.
arch/arm/include/samd5e5: Add chip.h header file.
arch/arm/Kconfig and arch/arm/src/samd5e5/Kconfig: Add configuration logic for the SAMD5x/Ex family.
155 lines
5.3 KiB
C
155 lines
5.3 KiB
C
/****************************************************************************
|
|
* arch/arm/src/samd5e5/sam_timerisr.c
|
|
*
|
|
* Copyright (C) 2018 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/irq.h>
|
|
|
|
#include "nvic.h"
|
|
#include "clock/clock.h"
|
|
#include "up_internal.h"
|
|
#include "up_arch.h"
|
|
|
|
#include <arch/board/board.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* The SysTick is driven by the CPU clock. */
|
|
|
|
#define SAM_SYSTICK_CLOCK BOARD_CPU_FREQUENCY /* CPU frequency */
|
|
|
|
/* 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).
|
|
*/
|
|
|
|
#define SYSTICK_RELOAD ((SAM_SYSTICK_CLOCK / CLK_TCK) - 1)
|
|
|
|
/* 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 Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: sam_timerisr
|
|
*
|
|
* Description:
|
|
* The timer ISR will perform a variety of services for various portions
|
|
* of the systems.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int sam_timerisr(int irq, uint32_t *regs, void *arg)
|
|
{
|
|
/* Process timer interrupt */
|
|
|
|
sched_process_timer();
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: arm_timer_initialize
|
|
*
|
|
* Description:
|
|
* This function is called during start-up to initialize the timer
|
|
* interrupt.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void arm_timer_initialize(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);
|
|
#ifdef 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);
|
|
putreg32(0, NVIC_SYSTICK_CURRENT);
|
|
|
|
/* Attach the timer interrupt vector */
|
|
|
|
(void)irq_attach(SAM_IRQ_SYSTICK, (xcpt_t)sam_timerisr, NULL);
|
|
|
|
/* 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);
|
|
}
|