diff options
author | Gregory Nutt <gnutt@nuttx.org> | 2013-10-18 16:56:46 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2013-10-18 16:56:46 -0600 |
commit | a500d703dcd27675581b173ae43ff5c3dfa8d4de (patch) | |
tree | 96bc470a7406a17bb7b77d166cdf1853f0905db2 /nuttx | |
parent | 7d6fed942343f27f21d29b260507697349839d31 (diff) | |
download | px4-nuttx-a500d703dcd27675581b173ae43ff5c3dfa8d4de.tar.gz px4-nuttx-a500d703dcd27675581b173ae43ff5c3dfa8d4de.tar.bz2 px4-nuttx-a500d703dcd27675581b173ae43ff5c3dfa8d4de.zip |
SAMA5 RTC: Beginning of an RTC driver for the SAMA5
Diffstat (limited to 'nuttx')
-rw-r--r-- | nuttx/ChangeLog | 6 | ||||
-rw-r--r-- | nuttx/arch/arm/src/sama5/sam_rtc.c | 703 | ||||
-rw-r--r-- | nuttx/arch/arm/src/sama5/sam_rtc.h | 71 |
3 files changed, 780 insertions, 0 deletions
diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog index f2981386c..c21281fe2 100644 --- a/nuttx/ChangeLog +++ b/nuttx/ChangeLog @@ -5810,3 +5810,9 @@ preflight failures, and to use the file sector buffer as a bounce buffer when a user-supplied buffer is not suitable for DMA. From Mike Smith (2013-10-18). + * arch/arm/src/sama5/chip/sam_rtc.h and sam_wdt.h: Add WDT and RTC + register definition header files (2013-10-18). + * arch/arm/src/sama5/chip/sam_rtc.c and sam_rtc.h: Basic RTC driver. + Support for RTC alarms is fragmentary and this has not yet been hooked + into the build system (2013-10-18). + diff --git a/nuttx/arch/arm/src/sama5/sam_rtc.c b/nuttx/arch/arm/src/sama5/sam_rtc.c new file mode 100644 index 000000000..e47d4c544 --- /dev/null +++ b/nuttx/arch/arm/src/sama5/sam_rtc.c @@ -0,0 +1,703 @@ +/************************************************************************************ + * arch/arm/src/sama5/sam_rtc.c + * + * Copyright (C) 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 <nuttx/arch.h> +#include <nuttx/irq.h> +#include <nuttx/rtc.h> + +#include <time.h> +#include <errno.h> +#include <debug.h> + +#include <arch/board/board.h> + +#include "up_arch.h" + +#include "sam_rtc.h" + +#ifdef CONFIG_RTC + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ +/* Configuration ********************************************************************/ +/* This RTC implementation supports only date/time RTC hardware */ + +#ifndef CONFIG_RTC_DATETIME +# error "CONFIG_RTC_DATETIME must be set to use this driver" +#endif + +#ifdef CONFIG_RTC_HIRES +# error "CONFIG_RTC_HIRES must NOT be set with this driver" +#endif + +#ifndef CONFIG_STM32_PWR +# error "CONFIG_STM32_PWR must selected to use this driver" +#endif + +#define RTC_MAGIC 0xdeadbeef + +#ifndef CONFIG_DEBUG +# undef CONFIG_DEBUG_RTC +#endif + +/* Constants ************************************************************************/ + +/* Debug ****************************************************************************/ + +#ifdef CONFIG_DEBUG_RTC +# define rtcdbg dbg +# define rtcvdbg vdbg +# define rtclldbg lldbg +# define rtcllvdbg llvdbg +#else +# define rtcdbg(x...) +# define rtcvdbg(x...) +# define rtclldbg(x...) +# define rtcllvdbg(x...) +#endif + +/************************************************************************************ + * Private Types + ************************************************************************************/ + +/************************************************************************************ + * Private Data + ************************************************************************************/ + +/* Callback to use when the alarm expires */ + +#ifdef CONFIG_RTC_ALARM +static alarmcb_t g_alarmcb; +#endif + +/************************************************************************************ + * Public Data + ************************************************************************************/ + +/* g_rtc_enabled is set true after the RTC has successfully initialized */ + +volatile bool g_rtc_enabled = false; + +/************************************************************************************ + * Private Functions + ************************************************************************************/ +/************************************************************************************ + * Name: rtc_dumpregs + * + * Description: + * Disable RTC write protection + * + * Input Parameters: + * None + * + * Returned Value: + * None + * + ************************************************************************************/ + +#ifdef CONFIG_DEBUG_RTC +static void rtc_dumpregs(FAR const char *msg) +{ + rtclldbg("%s:\n", msg); + rtclldbg(" CR: %08x\n", getreg32(SAM_RTC_CR)); + rtclldbg(" MR: %08x\n", getreg32(SAM_RTC_MR)); + rtclldbg(" TIMR: %08x\n", getreg32(SAM_RTC_TIMR)); + rtclldbg(" CALR: %08x\n", getreg32(SAM_RTC_CALR)); + rtclldbg(" TIMALR: %08x\n", getreg32(SAM_RTC_TIMALR)); + rtclldbg(" CALALR: %08x\n", getreg32(SAM_RTC_CALALR)); + rtclldbg(" SR: %08x\n", getreg32(SAM_RTC_SR)); + rtclldbg(" IMR: %08x\n", getreg32(SAM_RTC_IMR)); + rtclldbg(" VAR: %08x\n", getreg32(SAM_RTC_VER)); +} +#else +# define rtc_dumpregs(msg) +#endif + +/************************************************************************************ + * Name: rtc_dumptime + * + * Description: + * Disable RTC write protection + * + * Input Parameters: + * None + * + * Returned Value: + * None + * + ************************************************************************************/ + +#ifdef CONFIG_DEBUG_RTC +static void rtc_dumptime(FAR struct tm *tp, FAR const char *msg) +{ + rtclldbg("%s:\n", msg); + rtclldbg(" tm_sec: %08x\n", tp->tm_sec); + rtclldbg(" tm_min: %08x\n", tp->tm_min); + rtclldbg(" tm_hour: %08x\n", tp->tm_hour); + rtclldbg(" tm_mday: %08x\n", tp->tm_mday); + rtclldbg(" tm_mon: %08x\n", tp->tm_mon); + rtclldbg(" tm_year: %08x\n", tp->tm_year); +} +#else +# define rtc_dumptime(tp, msg) +#endif + +/************************************************************************************ + * Name: rtc_bin2bcd + * + * Description: + * Converts a 2 digit binary to BCD format + * + * Input Parameters: + * value - The byte to be converted. + * + * Returned Value: + * The value in BCD representation + * + ************************************************************************************/ + +static uint32_t rtc_bin2bcd(int value) +{ + uint32_t msbcd = 0; + + while (value >= 10) + { + msbcd++; + value -= 10; + } + + return (msbcd << 4) | value; +} + +/************************************************************************************ + * Name: rtc_bin2bcd + * + * Description: + * Convert from 2 digit BCD to binary. + * + * Input Parameters: + * value - The BCD value to be converted. + * + * Returned Value: + * The value in binary representation + * + ************************************************************************************/ + +static int rtc_bcd2bin(uint32_t value) +{ + uint32_t tens = (value >> 4) * 10; + return (int)(tens + (value & 0x0f)); +} + +/************************************************************************************ + * Name: rtc_setup + * + * Description: + * Performs first time configuration of the RTC. A special value written into + * back-up register 0 will prevent this function from being called on sub-sequent + * resets or power up. + * + * Input Parameters: + * None + * + * Returned Value: + * Zero (OK) on success; a negated errno on failure + * + ************************************************************************************/ + +static int rtc_setup(void) +{ +#warning Missing logic + + /* Set the 24 hour format */ + + putreg32(0, SAM_RTC_MR); + return OK; +} + +/************************************************************************************ + * Name: rtc_resume + * + * Description: + * Called when the RTC was already initialized on a previous power cycle. This + * just brings the RTC back into full operation. + * + * Input Parameters: + * None + * + * Returned Value: + * Zero (OK) on success; a negated errno on failure + * + ************************************************************************************/ + +static int rtc_resume(void) +{ + int ret; + +#warning Missing logic + +#ifdef CONFIG_RTC_ALARM + /* Clear the RTC alarm flags */ +#warning Missing logic +#endif + + return ret; +} + +/************************************************************************************ + * Name: rtc_interrupt + * + * Description: + * RTC interrupt service routine + * + * Input Parameters: + * irq - The IRQ number that generated the interrupt + * context - Architecture specific register save information. + * + * Returned Value: + * Zero (OK) on success; A negated errno value on failure. + * + ************************************************************************************/ + +#if CONFIG_RTC_ALARM +static int rtc_interrupt(int irq, void *context) +{ +#warning "Missing logic" + return OK; +} +#endif + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: up_rtcinitialize + * + * Description: + * Initialize the hardware RTC per the selected configuration. This function is + * called once during the OS initialization sequence + * + * Input Parameters: + * None + * + * Returned Value: + * Zero (OK) on success; a negated errno on failure + * + ************************************************************************************/ + +int up_rtcinitialize(void) +{ + uint32_t regval; + int ret; + + rtc_dumpregs("On reset"); + + /* No clocking setup need be performed. */ + + /* Check if the one-time initialization of the RTC has already been performed. + * We can determine this by checking if the magic number has been written to + * to back-up date register SYS_GPBR0. + */ + + if (getreg32(SAM_SYS_GPBR0) != RTC_MAGIC) + { + /* Perform the one-time setup of the LSE clocking to the RTC */ + + ret = rtc_setup(); + + /* Remember that the RTC is initialized */ + + putreg32(RTC_MAGIC, SAM_SYS_GPBR0)); + } + else + { + /* RTC already set-up, just resume normal operation */ + + ret = rtc_resume(); + } + +#ifdef CONFIG_RTC_ALARM + /* Then attach the ALARM interrupt handler */ + + irq_attach(SAM_PID_SYS, rtc_interrupt); + + /* Should RTC alarm interrupt be enabled at the peripheral? Let's assume so + * for now. + */ +#warning REVISIT + putreg32(RTC_IER_ALREN, SAM_RTC_IDR); + + /* Enable SYSC interrupts at the AIC */ + + up_enable_irq(SAM_PID_SYS); +#endif + + g_rtc_enabled = true; + rtc_dumpregs("After Initialization"); + return OK; +} + +/************************************************************************************ + * Name: up_rtc_getdatetime + * + * Description: + * Get the current date and time from the date/time RTC. This interface + * is only supported by the date/time RTC hardware implementation. + * It is used to replace the system timer. It is only used by the RTOS during + * intialization to set up the system time when CONFIG_RTC and CONFIG_RTC_DATETIME + * are selected (and CONFIG_RTC_HIRES is not). + * + * NOTE: Some date/time RTC hardware is capability of sub-second accuracy. That + * sub-second accuracy is lost in this interface. However, since the system time + * is reinitialized on each power-up/reset, there will be no timing inaccuracy in + * the long run. + * + * Input Parameters: + * tp - The location to return the high resolution time value. + * + * Returned Value: + * Zero (OK) on success; a negated errno on failure + * + ************************************************************************************/ + +int up_rtc_getdatetime(FAR struct tm *tp) +{ + uint32_t timr; + uint32_t calr; + uint32_t cent; + uint32_t year; + uint32_t tmp; + + /* Sample the data time registers. There is a race condition here... If we sample + * the time just before midnight on December 31, the date could be wrong because + * the day rolled over while were sampling. + */ + + do + { + calr = getreg32(SAM_RTC_CALR); + timr = getreg32(SAM_RTC_TIMR); + tmp = getreg32(SAM_RTC_CALR); + } + while (tmp != dr); + + rtc_dumpregs("Reading Time"); + + /* Convert the RTC time register fields to struct tm format. + * + * struct tm TIMR register + * tm_sec 0-61* SEC (0-59) + * tm_min 0-59 MIN (0-59) + * tm_hour 0-23 HOUR (0-23) + * + * *To allow for leap seconds. But these never actuall happen. + */ + + tmp = (timr & RTC_TIMR_SEC_MASK) >> RTC_TIMR_SEC_SHIFT; + tp->tm_sec = rtc_bcd2bin(tmp); + + tmp = (timr & RTC_TIMR_MIN_MASK) >> RTC_TIMR_MIN_SHIFT; + tp->tm_min = rtc_bcd2bin(tmp); + + tmp = (timr & RTC_TIMR_HOUR_MASK) >> RTC_TIMR_HOUR_SHIFT; + tp->tm_hour = rtc_bcd2bin(tmp); + + /* Convert the RTC date register fields to struct tm format. + * + * struct tm TIMR register + * tm_mday 1-31 DATE (1-31) + * tm_wday 0-6 DAY (1-7) ** + * tm_mon 0-11 MONTH: (1-12) + * tm_year * YEAR (0-99) + * CENT (19-20) + * + * *Years since 1900 + * **Day of the week is not supported + */ + + tmp = (calr & RTC_CALR_DATE_SHIFT) >> RTC_CALR_DATE_MASK; + tp->tm_mday = rtc_bcd2bin(tmp); + + tmp = (calr & RTC_CALR_MONTH_SHIFT) >> RTC_CALR_MONTH_MASK; + tp->tm_mon = rtc_bcd2bin(tmp) - 1; + + tmp = (calr & RTC_CALR_CENT_SHIFT) >> RTC_CALR_CENT_MASK; + cent = rtc_bcd2bin(tmp) + tmp = (calr & RTC_CALR_YEAR_SHIFT) >> RTC_CALR_YEAR_MASK; + year = rtc_bcd2bin(tmp) + tp->tm_year = cent * 100 + year - 1900; + + rtc_dumptime(tp, "Returning"); + return OK; +} + +/************************************************************************************ + * Name: up_rtc_settime + * + * Description: + * Set the RTC to the provided time. All RTC implementations must be able to + * set their time based on a standard timespec. + * + * Input Parameters: + * tp - the time to use + * + * Returned Value: + * Zero (OK) on success; a negated errno on failure + * + ************************************************************************************/ + +int up_rtc_settime(FAR const struct timespec *tp) +{ + FAR struct tm newtime; + uint32_t regval; + uint32_t timr; + uint32_t calr; + uint32_t cent; + uint32_t year; + int ret; + + /* Break out the time values (note that the time is set only to units of seconds) */ + + (void)gmtime_r(&tp->tv_sec, &newtime); + rtc_dumptime(&newtime, "Setting time"); + + /* Then write the broken out values to the RTC */ + + /* Convert the struct tm format to RTC time register fields. + * + * struct tm TIMR register + * tm_sec 0-61* SEC (0-59) + * tm_min 0-59 MIN (0-59) + * tm_hour 0-23 HOUR (0-23) + * + * *To allow for leap seconds. But these never actuall happen. + */ + + timr = (rtc_bin2bcd(newtime.tm_sec) << RTC_TIMR_SEC_SHIFT) & RTC_TIMR_SEC_MASK; + timr |= (rtc_bin2bcd(newtime.tm_min) << RTC_TIMR_MIN_SHIFT) & RTC_TIMR_MIN_MASK; + timr |= (rtc_bin2bcd(newtime.tm_hour) << RTC_TIMR_HOUR_SHIFT) & RTC_TIMR_HOUR_MASK; + + /* Convert the struct tm format to RTC date register fields. + * + * struct tm CALR register + * tm_mday 1-31 DATE (1-31) + * tm_wday 0-6 DAY (1-7) ** + * tm_mon 0-11 MONTH: (1-12) + * tm_year * YEAR (0-99) + * CENT (19-20) + * + * *Years since 1900 + * **Day of the week is not supported + */ + + calr = (rtc_bin2bcd(newtime.tm_mday) << RTC_CALR_DATE_SHIFT) & RTC_CALR_DATE_MASK; + calr |= (rtc_bin2bcd(1) << RTC_CALR_DAY_SHIFT) & RTC_CALR_DAY_MASK; + calr |= (rtc_bin2bcd(newtime.tm_mon+1) << RTC_CALR_DATE_SHIFT) & RTC_CALR_DATE_MASK; + + cent = newtime.tm_year / 100 + 19; + year = newtime.tm_year % 100; + + calr |= (rtc_bin2bcd(year) << RTC_CALR_YEAR_SHIFT) & RTC_CALR_YEAR_MASK; + calr |= (rtc_bin2bcd(cent) << RTC_CALR_CENT_SHIFT) & RTC_CALR_CENT_MASK; + + /* Stop RTC time counting */ + + regval = getreg32(SAM_RTC_CR); + regval |= RTC_CR_UPDTIM; + putreg32(regval, SAM_RTC_CR); + + /* Wait until the RTC has stopped so that we can update the time */ + + while ((getreg32(SAM_RTC_SR) & RTC_SR_ACKUPD) != RTC_SR_ACKUPD); + + /* Clear the ACKUPD bit in the status register */ + + putreg32(RTC_SCCR_ACKCLR, SAM_RTC_SCCR); + + /* Stop RTC date counting */ + + regval = getreg32(SAM_RTC_CR); + regval |= RTC_CR_UPDCAL; + putreg32(regval, SAM_RTC_CR); + + /* Wait until the counting has stopped so that we can update the time */ + + while ((getreg32(SAM_RTC_SR) & RTC_SR_ACKUPD) != RTC_SR_ACKUPD); + + /* Clear the ACKUPD bit in the status register */ + + putreg32(RTC_SCCR_ACKCLR, SAM_RTC_SCCR); + + /* Set the new date */ + + putreg32(calr, SAM_RTC_CALR); + + /* Write the new time */ + + putreg32(timr, SAM_RTC_TIMR); + + /* Resume RTC date/time counting */ + + regval = getreg32(SAM_RTC_CR); + regval &= ~(RTC_CR_UPDTIM | RTC_CR_UPDCAL); + putreg32(regval, SAM_RTC_CR); + + /* Clear the SEC status in the SR */ + + regval = getreg32(SAM_RTC_SCCR); + regval = RTC_SCCR_SECCLR; + putreg32(regval, SAM_RTC_SCCR); + + DEBUGASSERT((getreg32(SAM_RTC_VER) & RTC_VER_NVTIM) == 0); + DEBUGASSERT((getreg32(SAM_RTC_VER) & RTC_VER_NVCAL) == 0); + + rtc_dumpregs("New time setting"); + return ret; +} + +/************************************************************************************ + * Name: up_rtc_setalarm + * + * Description: + * Set up an alarm. Up to two alarms can be supported (ALARM A and ALARM B). + * + * Input Parameters: + * tp - the time to set the alarm + * callback - the function to call when the alarm expires. + * + * Returned Value: + * Zero (OK) on success; a negated errno on failure + * + ************************************************************************************/ + +#ifdef CONFIG_RTC_ALARM +int up_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback) +{ + FAR struct tm newalarm; + irqstate_t flags; + uint32_t regval; + uint32_t timalr; + uint32_t calalr; + uint32_t cent; + uint32_t year; + int ret = -EBUSY; + + /* Is there already something waiting on the ALARM? */ + + flags = irqsave(); + if (g_alarmcb == NULL) + { + /* No.. Save the callback function pointer */ + + g_alarmcb = callback; + + /* Clear any pending alarm interrupts */ + + putreg32(RTC_SCCR_ALRCLR, SAM_RTC_SCCR); + + /* Break out the time values (note that the time is set only to units + * of seconds) + */ + + (void)gmtime_r(&tp->tv_sec, &newalarm); + rtc_dumptime(&newalarm, "Setting alarm"); + + /* Then write the broken out values to the RTC */ + + /* Convert the struct tm format to RTC time register fields. + * + * struct tm TIMALR register + * tm_sec 0-61* SEC (0-59) + * tm_min 0-59 MIN (0-59) + * tm_hour 0-23 HOUR (0-23) + * + * *To allow for leap seconds. But these never actuall happen. + */ + + timalr = (rtc_bin2bcd(newalarm.tm_sec) << RTC_TIMRALR_SEC_SHIFT) & RTC_TIMRALR_SEC_MASK; + timalr |= (rtc_bin2bcd(newalarm.tm_min) << RTC_TIMRALR_MIN_SHIFT) & RTC_TIMRALR_MIN_MASK; + timalr |= (rtc_bin2bcd(newalarm.tm_hour) << RTC_TIMRALR_HOUR_SHIFT) & RTC_TIMRALR_HOUR_MASK; + timalr |= (RTC_TIMALR_SECEN | RTC_TIMALR_MINEN | RTC_TIMALR_HOUREN); + + /* Convert the struct tm format to RTC date register fields. + * + * struct tm CALALR register + * tm_mday 1-31 DATE (1-31) + * tm_wday 0-6 DAY (1-7) ** + * tm_mon 0-11 MONTH: (1-12) + * tm_year * YEAR (0-99) + * CENT (19-20) + * + * *Years since 1900 + * **Day of the week is not supported + */ + + calalr = (rtc_bin2bcd(newalarm.tm_mday) << RTC_CALALR_DATE_SHIFT) & RTC_CALALR_DATE_MASK; + calalr |= (rtc_bin2bcd(newalarm.tm_mon+1) << RTC_CALALR_DATE_SHIFT) & RTC_CALALR_DATE_MASK; + calalr |= (RTC_CALALR_MTHEN | RTC_CALALR_DATEEN) + + /* Set the new date */ + + putreg32(calalr, SAM_RTC_CALALRR); + + /* Write the new time */ + + putreg32(timalr, SAM_RTC_TIMALR); + + DEBUGASSERT((getreg32(SAM_RTC_VER) & RTC_VER_NVTIMALR) == 0); + DEBUGASSERT((getreg32(SAM_RTC_VER) & RTC_VER_NVCALALR) == 0); + + rtc_dumpregs("New alarm setting"); + + /* Enable alarm interrupts */ + + putreg32(RTC_IER_ALREN, SAM_RTC_IER); + ret = OK; + } + + return ret; +} +#endif + +#endif /* CONFIG_RTC */ + diff --git a/nuttx/arch/arm/src/sama5/sam_rtc.h b/nuttx/arch/arm/src/sama5/sam_rtc.h new file mode 100644 index 000000000..2b3189054 --- /dev/null +++ b/nuttx/arch/arm/src/sama5/sam_rtc.h @@ -0,0 +1,71 @@ +/************************************************************************************ + * arch/arm/src/sama5/stm_rtc.h + * + * Copyright (C) 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 + ************************************************************************************/ + +#ifndef __ARCH_ARM_SRC_SAMA5_SAM_RTC_H +#define __ARCH_ARM_SRC_SAMA5_SAM_RTC_H + +#include <nuttx/config.h> + +#include "chip.h" +#include "chip/sam_rtc.h" + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +#ifndef __ASSEMBLY__ + +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +#undef EXTERN +#if defined(__cplusplus) +} +#endif +#endif /* __ASSEMBLY__ */ +#endif /* __ARCH_ARM_SRC_SAMA5_SAM_RTC_H */ |