arch/arm/src/lpc43xx: Adapt LPC176x RTC driver for the LPC43xx.
This commit is contained in:
Gintaras Drukteinis
Gregory Nutt
parent
43a88c1428
commit
1fbf788555
@ -1,7 +1,7 @@
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############################################################################
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# arch/arm/src/lpc43xx/Make.defs
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#
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# Copyright (C) 2012-2015 Gregory Nutt. All rights reserved.
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# Copyright (C) 2012-2015, 2017 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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@ -146,6 +146,10 @@ ifeq ($(CONFIG_LPC43_RIT),y)
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CHIP_CSRCS += lpc43_rit.c
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endif
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ifeq ($(CONFIG_LPC43_RTC),y)
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CHIP_CSRCS += lpc43_rtc.c
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endif
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ifeq ($(CONFIG_LPC43_I2C0),y)
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CHIP_CSRCS += lpc43_i2c.c
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else ifeq ($(CONFIG_LPC43_I2C1),y)
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404
arch/arm/src/lpc43xx/lpc43_rtc.c
Normal file
404
arch/arm/src/lpc43xx/lpc43_rtc.c
Normal file
@ -0,0 +1,404 @@
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/************************************************************************************
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* arch/arm/src/lpc43xx/lpc43_rtc.c
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*
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* Copyright (C) 2014, 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Adapted for the LPC43xx by Gintaras Drukteinis from the similar LCP176x RTC driver.
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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 <time.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.h>
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#include <nuttx/time.h>
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "up_internal.h"
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#include "chip.h"
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#include "chip/lpc43_creg.h"
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#include "chip/lpc43_rtc.h"
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#include "lpc43_rtc.h"
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#ifdef CONFIG_RTC
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* Configuration ********************************************************************/
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/* This RTC implementation supports only date/time RTC hardware */
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#ifndef CONFIG_RTC_DATETIME
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# error "CONFIG_RTC_DATETIME must be set to use this driver"
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#endif
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#ifdef CONFIG_RTC_HIRES
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# error "CONFIG_RTC_HIRES must NOT be set with this driver"
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#endif
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/************************************************************************************
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* Private Data
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************************************************************************************/
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/* Callback to use when the alarm expires */
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#ifdef CONFIG_RTC_ALARM
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static alarmcb_t g_alarmcb;
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#endif
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/************************************************************************************
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* Public Data
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************************************************************************************/
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/* g_rtc_enabled is set true after the RTC has successfully initialized */
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volatile bool g_rtc_enabled = false;
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Name: rtc_dumpregs
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*
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* Description:
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* Disable RTC write protection
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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************************************************************************************/
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#ifdef CONFIG_DEBUG_RTC_INFO
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static void rtc_dumpregs(FAR const char *msg)
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{
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rtcinfo("%s:\n", msg);
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rtcinfo(" DOM : %08x\n", (getreg32(LPC43_RTC_DOM) & RTC_DOM_MASK));
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rtcinfo(" DOW : %08x\n", (getreg32(LPC43_RTC_DOW) & RTC_DOW_MASK));
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}
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#else
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# define rtc_dumpregs(msg)
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#endif
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/************************************************************************************
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* Name: rtc_dumptime
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*
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* Description:
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* Disable RTC write protection
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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************************************************************************************/
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#ifdef CONFIG_DEBUG_RTC_INFO
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static void rtc_dumptime(FAR struct tm *tp, FAR const char *msg)
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{
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rtcinfo("%s:\n", msg);
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rtcinfo(" tm_sec: %08x\n", tp->tm_sec);
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rtcinfo(" tm_min: %08x\n", tp->tm_min);
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rtcinfo(" tm_hour: %08x\n", tp->tm_hour);
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rtcinfo(" tm_mday: %08x\n", tp->tm_mday);
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rtcinfo(" tm_mon: %08x\n", tp->tm_mon);
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rtcinfo(" tm_year: %08x\n", tp->tm_year);
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}
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#else
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# define rtc_dumptime(tp, msg)
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#endif
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/************************************************************************************
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* Name: rtc_setup
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*
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* Description:
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* Performs first time configuration of the RTC. A special value written into
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* back-up register 0 will prevent this function from being called on sub-sequent
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* resets or power up.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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************************************************************************************/
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static int rtc_setup(void)
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{
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uint32_t regval;
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/* Enable RTC Clock */
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regval = getreg32(LPC43_CREG0);
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regval &= ~(CREG0_RESET32KHZ | CREG0_PD32KHZ); /* Reset 32Khz oscillator */
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putreg32(regval, LPC43_CREG0);
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regval = getreg32(LPC43_CREG0);
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regval |= (CREG0_EN1KHZ | CREG0_EN32KHZ); /* Enable 32 kHz & 1 kHz on osc32k and release reset */
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putreg32(regval, LPC43_CREG0);
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/* Clear all register to be default */
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putreg32((uint32_t)0x00, LPC43_RTC_ILR);
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putreg32((uint32_t)0x00, LPC43_RTC_CCR);
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putreg32((uint32_t)0x00, LPC43_RTC_CIIR);
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putreg32((uint32_t)0xff, LPC43_RTC_AMR);
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putreg32((uint32_t)0x00, LPC43_RTC_CALIB);
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/* Enable counters */
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putreg32((uint32_t)0x01, LPC43_RTC_CCR);
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return OK;
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}
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/************************************************************************************
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* Name: rtc_interrupt
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*
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* Description:
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* RTC interrupt service routine
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*
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* Input Parameters:
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* irq - The IRQ number that generated the interrupt
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* context - Architecture specific register save information.
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*
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* Returned Value:
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* Zero (OK) on success; A negated errno value on failure.
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*
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************************************************************************************/
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#ifdef CONFIG_RTC_ALARM
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static int rtc_interrupt(int irq, void *context)
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{
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#warning "Missing logic"
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return OK;
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}
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#endif
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: up_rtc_initialize
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*
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* Description:
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* Initialize the hardware RTC per the selected configuration. This function is
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* called once during the OS initialization sequence
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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************************************************************************************/
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int up_rtc_initialize(void)
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{
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int ret;
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rtc_dumpregs("On reset");
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#ifdef CONFIG_RTC_ALARM
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/* Attach the RTC interrupt handler */
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ret = irq_attach(LPC43M4_IRQ_RTC, rtc_interrupt);
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if (ret == OK)
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{
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up_enable_irq(LPC43M4_IRQ_RTC);
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}
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#endif /* CONFIG_RTC_ALARM */
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/* Perform the one-time setup of the RTC */
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ret = rtc_setup();
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/* Configure RTC interrupt to catch alarm interrupts. All RTC interrupts are
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* connected to the EXTI controller. To enable the RTC Alarm interrupt, the
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* following sequence is required:
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*
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* 1. Configure and enable the EXTI Line 17 in interrupt mode and select the
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* rising edge sensitivity.
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* 2. Configure and enable the RTC_Alarm IRQ channel in the NVIC.
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* 3. Configure the RTC to generate RTC alarms (Alarm A or Alarm B).
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*/
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g_rtc_enabled = true;
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rtc_dumpregs("After Initialization");
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return ret;
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}
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/************************************************************************************
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* Name: up_rtc_getdatetime
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*
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* Description:
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* Get the current date and time from the date/time RTC. This interface
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* is only supported by the date/time RTC hardware implementation.
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* It is used to replace the system timer. It is only used by the RTOS during
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* initialization to set up the system time when CONFIG_RTC and CONFIG_RTC_DATETIME
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* are selected (and CONFIG_RTC_HIRES is not).
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*
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* NOTE: Some date/time RTC hardware is capability of sub-second accuracy. That
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* sub-second accuracy is lost in this interface. However, since the system time
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* is reinitialized on each power-up/reset, there will be no timing inaccuracy in
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* the long run.
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*
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* Input Parameters:
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* tp - The location to return the high resolution time value.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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************************************************************************************/
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int up_rtc_getdatetime(FAR struct tm *tp)
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{
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rtc_dumpregs("Reading Time");
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/* Convert the RTC time to fields in struct tm format.*/
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tp->tm_sec = ((getreg32(LPC43_RTC_SEC) & RTC_SEC_MASK));
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tp->tm_min = ((getreg32(LPC43_RTC_MIN) & RTC_MIN_MASK));
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tp->tm_hour = ((getreg32(LPC43_RTC_HOUR) & RTC_HOUR_MASK));
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/* Now convert the RTC date to fields in struct tm format*/
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tp->tm_mday = ((getreg32(LPC43_RTC_DOM) & RTC_DOM_MASK));
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tp->tm_mon = ((getreg32(LPC43_RTC_MONTH) & RTC_MONTH_MASK)) - 1;
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tp->tm_year = ((getreg32(LPC43_RTC_YEAR) & RTC_YEAR_MASK)-1900);
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#if defined(CONFIG_LIBC_LOCALTIME) || defined(CONFIG_TIME_EXTENDED)
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tp->tm_wday = ((getreg32(LPC43_RTC_DOW) & RTC_DOW_MASK));
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tp->tm_yday = ((getreg32(LPC43_RTC_DOY) & RTC_DOY_MASK));
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#endif
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rtc_dumptime(tp, "Returning");
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return OK;
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}
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/************************************************************************************
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* Name: up_rtc_settime
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*
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* Description:
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* Set the RTC to the provided time. All RTC implementations must be able to
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* set their time based on a standard timespec.
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*
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* Input Parameters:
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* tp - the time to use
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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************************************************************************************/
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int up_rtc_settime(FAR const struct timespec *tp)
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{
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FAR struct tm newtime;
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/* Break out the time values (not that the time is set only to units of seconds) */
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(void)gmtime_r(&tp->tv_sec, &newtime);
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rtc_dumptime(&newtime, "Setting time");
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/* Then write the broken out values to the RTC */
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putreg32(((newtime.tm_sec) & RTC_SEC_MASK), LPC43_RTC_SEC);
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putreg32(((newtime.tm_min) & RTC_MIN_MASK), LPC43_RTC_MIN);
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putreg32(((newtime.tm_hour) & RTC_HOUR_MASK), LPC43_RTC_HOUR);
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putreg32(((newtime.tm_mday) & RTC_DOM_MASK), LPC43_RTC_DOM);
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putreg32((((newtime.tm_mon)+1) & RTC_MONTH_MASK), LPC43_RTC_MONTH);
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putreg32(((newtime.tm_year) & RTC_YEAR_MASK)+1900, LPC43_RTC_YEAR);
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#if defined(CONFIG_LIBC_LOCALTIME) || defined(CONFIG_TIME_EXTENDED)
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putreg32(((newtime.tm_wday) & RTC_DOW_MASK), LPC43_RTC_DOW);
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putreg32(((newtime.tm_yday) & RTC_DOY_MASK), LPC43_RTC_DOY);
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#endif
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return OK;
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}
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/************************************************************************************
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* Name: lpc43_rtc_setalarm
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*
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* Description:
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* Set up an alarm. Up to two alarms can be supported (ALARM A and ALARM B).
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*
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* Input Parameters:
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* tp - the time to set the alarm
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* callback - the function to call when the alarm expires.
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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************************************************************************************/
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#ifdef CONFIG_RTC_ALARM
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int lpc43_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback)
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{
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int ret = -EBUSY;
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/* Is there already something waiting on the ALARM? */
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if (g_alarmcb == NULL)
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{
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/* No.. Save the callback function pointer */
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g_alarmcb = callback;
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/* Break out the time values */
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#warning "Missing logic"
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/* The set the alarm */
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#warning "Missing logic"
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ret = OK;
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}
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return ret;
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}
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#endif
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#endif /* CONFIG_RTC */
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51
arch/arm/src/lpc43xx/lpc43_rtc.h
Normal file
51
arch/arm/src/lpc43xx/lpc43_rtc.h
Normal file
@ -0,0 +1,51 @@
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/****************************************************************************
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* arch/arm/src/lpc43xx/lpc43_rtc.h
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*
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* Copyright (C) 2012, 2017 Gregory Nutt. All rights reserved.
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* Author: Brandon Warhurst <warhurst_002@yahoo.com>
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*
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* Adapted from the similar LCP17xx RTC by Gintaras Drukteinis.
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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
|
||||
* 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
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_LPC43XX_LPC43_RTC_H
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#define __ARCH_ARM_SRC_LPC43XX_LPC43_RTC_H
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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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/****************************************************************************
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* Public Functions
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****************************************************************************/
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#endif /* __ARCH_ARM_SRC_LPC43XX_LPC43_RTC_H */
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