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SAMA5: Hook RTC into build system; Finish RTC alarm logic; Verify correct behavior of the basic RTC functionality

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This commit is contained in:
Gregory Nutt 2013-10-19 10:41:20 -06:00
parent 9e8bc003e5
commit 8954161288
7 changed files with 113 additions and 114 deletions
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6
ChangeLog
View File

@ -5821,4 +5821,8 @@
* Kconfig: Add support for CONFIG_DEBUG_RTC (2013-10-19).
* configs/sama5d3x-ek/README.txt, demo/defconfig: Describe how to
enable RTC support for the nsh/ configuration; RTC is now enabled by
default in the demo configuration (2013-10-19).
default in the demo configuration (2013-10-19).
* arch/arm/src/sama5/sam_rtc.h and other files: Hook the SAMA5 RTC
driver into the build system; Verify the correct operation of the
SAMA5 RTC driver (2013-10-19).

2
arch/arm/src/sam34/chip/sam_rtc.h
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@ -159,7 +159,7 @@
/* RTC Calendar Register */
#define RTC_CALR_CENT_SHIFT (0) /* Bits 0-6: Current Century */
#define RTC_CALR_CENT_MASK (0x7f << RTC_TIMR_HOUR_SHIFT)
#define RTC_CALR_CENT_MASK (0x7f << RTC_CALR_CENT_SHIFT)
#define RTC_CALR_YEAR_SHIFT (8) /* Bits 8-15: Current Year */
#define RTC_CALR_YEAR_MASK (0xff << RTC_CALR_YEAR_SHIFT)
#define RTC_CALR_MONTH_SHIFT (16) /* Bits 16-20: Current Month */

10
arch/arm/src/sama5/Kconfig
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@ -100,6 +100,13 @@ config SAMA5_PIT
config SAMA5_WDT
bool "Watchdog timer Interrupt (WDT)"
default n
select WDT
config SAMA5_RTC
bool "Real time clock calendar (RTC)"
default n
select RTC
select RTC_DATETIME
config SAMA5_HSMC
bool "Static Memory Controller (HSMC)"
@ -193,6 +200,8 @@ config SAMA5_PWM
config SAMA5_ADC
bool "Touch Screen ADC Controller (ADC)"
default n
select ANALOG
select ADC
config SAMA5_DMAC0
bool "DMA Controller 0 (DMAC0)"
@ -2320,6 +2329,7 @@ config SAMA5_DDRCS_HEAP
heap (using RAM_END)
if SAMA5_DDRCS_HEAP
config SAMA5_DDRCS_HEAP_OFFSET
int "DDR-SDRAM offset"
default 0

4
arch/arm/src/sama5/Make.defs
View File

@ -110,6 +110,10 @@ ifeq ($(CONFIG_SAMA5_PIO_IRQ),y)
CHIP_CSRCS += sam_pioirq.c
endif
ifeq ($(CONFIG_SAMA5_RTC),y)
CHIP_CSRCS += sam_rtc.c
endif
ifeq ($(CONFIG_SAMA5_SPI0),y)
CHIP_CSRCS += sam_spi.c
else

2
arch/arm/src/sama5/chip/sam_rtc.h
View File

@ -118,7 +118,7 @@
/* RTC Calendar Register */
#define RTC_CALR_CENT_SHIFT (0) /* Bits 0-6: Current Century */
#define RTC_CALR_CENT_MASK (0x7f << RTC_TIMR_HOUR_SHIFT)
#define RTC_CALR_CENT_MASK (0x7f << RTC_CALR_CENT_SHIFT)
# define RTC_CALR_CENT(n) ((uint32_t)(n) << RTC_TIMR_HOUR_SHIFT)
#define RTC_CALR_YEAR_SHIFT (8) /* Bits 8-15: Current Year */
#define RTC_CALR_YEAR_MASK (0xff << RTC_CALR_YEAR_SHIFT)

2
arch/arm/src/sama5/chip/sam_wdt.h
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@ -74,7 +74,7 @@
#define WDT_MR_WDV_SHIFT (0) /* Bits 0-11: Watchdog Counter Value */
#define WDT_MR_WDV_MASK (0xfff << WDT_MR_WDV_SHIFT)
# define WDT_MR_WDV_MASK(n) ((uint32_t)(n) << WDT_MR_WDV_SHIFT)
# define WDT_MR_WDV(n) ((uint32_t)(n) << WDT_MR_WDV_SHIFT)
#define WDT_MR_WDFIEN (1 << 12) /* Bit 12: Watchdog Fault Interrupt Enable */
#define WDT_MR_WDRSTEN (1 << 13) /* Bit 13: Watchdog Reset Enable */
#define WDT_MR_WDRPROC (1 << 14) /* Bit 14: Watchdog Reset Processor */

201
arch/arm/src/sama5/sam_rtc.c
View File

@ -47,10 +47,10 @@
#include <errno.h>
#include <debug.h>
#include <nuttx/wqueue.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "sam_rtc.h"
#ifdef CONFIG_RTC
@ -69,8 +69,8 @@
# 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"
#if defined(CONFIG_RTC_ALARM) && !defined(CONFIG_SCHED_WORKQUEUE)
# error CONFIG_RTC_ALARM requires CONFIG_SCHED_WORKQUEUE
#endif
#define RTC_MAGIC 0xdeadbeef
@ -107,6 +107,7 @@
#ifdef CONFIG_RTC_ALARM
static alarmcb_t g_alarmcb;
struct work_s g_alarmwork;
#endif
/************************************************************************************
@ -146,7 +147,7 @@ static void rtc_dumpregs(FAR const char *msg)
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));
rtclldbg(" VER: %08x\n", getreg32(SAM_RTC_VER));
}
#else
# define rtc_dumpregs(msg)
@ -229,60 +230,37 @@ static int rtc_bcd2bin(uint32_t value)
}
/************************************************************************************
* Name: rtc_setup
* Name: rtc_worker
*
* 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.
* Perform alarm callback
*
* Input Parameters:
* None
* Standard work callbacks
*
* Returned Value:
* Zero (OK) on success; a negated errno on failure
* Zero (OK) on success; A negated errno value on failure.
*
************************************************************************************/
static int rtc_setup(void)
#if CONFIG_RTC_ALARM
static void rtc_worker(FAR void *arg)
{
#warning Missing logic
/* Sample once (atomically) */
/* Set the 24 hour format */
alarmcb_t alarmcb = g_alarmcb;
putreg32(0, SAM_RTC_MR);
return OK;
/* Is there a subscriber to the alarm? */
if (alarmcb)
{
/* Yes.. perform the callback */
alarmcb();
}
}
/************************************************************************************
* 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
*
@ -301,7 +279,24 @@ static int rtc_resume(void)
#if CONFIG_RTC_ALARM
static int rtc_interrupt(int irq, void *context)
{
#warning "Missing logic"
int ret;
/* Schedule the callback to occur on the low-priority worker thread */
DEBUGASSERT(work_available(&g_alarmwork));
ret = work_queue(LPWORK, &g_alarmwork, rtc_worker, NULL, 0);
if (ret < 0)
{
rtclldbg("ERRPR: work_queue failed: %d\n", ret);
}
/* Disable any further alarm interrupts*/
putreg32(RTC_IDR_ALRDIS, SAM_RTC_IDR);
/* Clear any pending alarm interrupts */
putreg32(RTC_SCCR_ALRCLR, SAM_RTC_SCCR);
return OK;
}
#endif
@ -327,34 +322,23 @@ static int rtc_interrupt(int irq, void *context)
int up_rtcinitialize(void)
{
uint32_t regval;
int ret;
uint32_t ver;
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.
/* No clocking setup need be performed. The Real-time Clock is continuously clocked
* at 32768 Hz (SCLK). The Power Management Controller has no effect on RTC
* behavior.
*/
if (getreg32(SAM_SYS_GPBR0) != RTC_MAGIC)
{
/* Perform the one-time setup of the LSE clocking to the RTC */
/* Set the 24 hour format */
ret = rtc_setup();
putreg32(0, SAM_RTC_MR);
/* Remember that the RTC is initialized */
/* Has the RTC been initialized? */
putreg32(RTC_MAGIC, SAM_SYS_GPBR0));
}
else
{
/* RTC already set-up, just resume normal operation */
ret = rtc_resume();
}
ver = getreg32(SAM_RTC_VER);
g_rtc_enabled = ((ver & (RTC_VER_NVTIM | RTC_VER_NVCAL)) == 0);
#ifdef CONFIG_RTC_ALARM
/* Then attach the ALARM interrupt handler */
@ -362,17 +346,29 @@ int up_rtcinitialize(void)
irq_attach(SAM_PID_SYS, rtc_interrupt);
/* Should RTC alarm interrupt be enabled at the peripheral? Let's assume so
* for now.
* for now. Let's say yes if the time is valid and a valid alarm has been
* programmed.
*/
#warning REVISIT
putreg32(RTC_IER_ALREN, SAM_RTC_IDR);
/* Enable SYSC interrupts at the AIC */
if (g_rtc_enabled && (ver & (RTC_VER_NVTIMALR | RTC_VER_NVCALALR)) == 0)
{
/* Enable the alarm interrupt at the RTC */
putreg32(RTC_IER_ALREN, SAM_RTC_IER);
}
else
{
/* Disable the alarm interrupt at the RTC */
putreg32(RTC_IDR_ALRDIS, SAM_RTC_IDR);
}
/* Enable SYSC interrupts at the AIC in any event */
up_enable_irq(SAM_PID_SYS);
#endif
g_rtc_enabled = true;
rtc_dumpregs("After Initialization");
return OK;
}
@ -419,7 +415,7 @@ int up_rtc_getdatetime(FAR struct tm *tp)
timr = getreg32(SAM_RTC_TIMR);
tmp = getreg32(SAM_RTC_CALR);
}
while (tmp != dr);
while (tmp != calr);
rtc_dumpregs("Reading Time");
@ -455,16 +451,16 @@ int up_rtc_getdatetime(FAR struct tm *tp)
* **Day of the week is not supported
*/
tmp = (calr & RTC_CALR_DATE_SHIFT) >> RTC_CALR_DATE_MASK;
tmp = (calr & RTC_CALR_DATE_MASK) >> RTC_CALR_DATE_SHIFT;
tp->tm_mday = rtc_bcd2bin(tmp);
tmp = (calr & RTC_CALR_MONTH_SHIFT) >> RTC_CALR_MONTH_MASK;
tmp = (calr & RTC_CALR_MONTH_MASK) >> RTC_CALR_MONTH_SHIFT;
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)
tmp = (calr & RTC_CALR_CENT_MASK) >> RTC_CALR_CENT_SHIFT;
cent = rtc_bcd2bin(tmp);
tmp = (calr & RTC_CALR_YEAR_MASK) >> RTC_CALR_YEAR_SHIFT;
year = rtc_bcd2bin(tmp);
tp->tm_year = cent * 100 + year - 1900;
rtc_dumptime(tp, "Returning");
@ -494,7 +490,6 @@ int up_rtc_settime(FAR const struct timespec *tp)
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) */
@ -527,12 +522,12 @@ int up_rtc_settime(FAR const struct timespec *tp)
* CENT (19-20)
*
* *Years since 1900
* **Day of the week is not supported
* **Day of the week is not supported. Set to Monday.
*/
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;
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_MONTH_SHIFT) & RTC_CALR_MONTH_MASK;
cent = newtime.tm_year / 100 + 19;
year = newtime.tm_year % 100;
@ -540,10 +535,10 @@ int up_rtc_settime(FAR const struct timespec *tp)
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 */
/* Stop RTC time and date counting */
regval = getreg32(SAM_RTC_CR);
regval |= RTC_CR_UPDTIM;
regval |= (RTC_CR_UPDTIM | RTC_CR_UPDCAL);
putreg32(regval, SAM_RTC_CR);
/* Wait until the RTC has stopped so that we can update the time */
@ -554,20 +549,6 @@ int up_rtc_settime(FAR const struct timespec *tp)
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);
@ -588,11 +569,13 @@ int up_rtc_settime(FAR const struct timespec *tp)
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);
/* The RTC should now be enabled */
g_rtc_enabled = ((getreg32(SAM_RTC_VER) & (RTC_VER_NVTIM | RTC_VER_NVCAL)) == 0);
DEBUGASSERT(g_rtc_enabled);
rtc_dumpregs("New time setting");
return ret;
return OK;
}
/************************************************************************************
@ -615,11 +598,8 @@ 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? */
@ -654,9 +634,9 @@ int up_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback)
* *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_bin2bcd(newalarm.tm_sec) << RTC_TIMALR_SEC_SHIFT) & RTC_TIMALR_SEC_MASK;
timalr |= (rtc_bin2bcd(newalarm.tm_min) << RTC_TIMALR_MIN_SHIFT) & RTC_TIMALR_MIN_MASK;
timalr |= (rtc_bin2bcd(newalarm.tm_hour) << RTC_TIMALR_HOUR_SHIFT) & RTC_TIMALR_HOUR_MASK;
timalr |= (RTC_TIMALR_SECEN | RTC_TIMALR_MINEN | RTC_TIMALR_HOUREN);
/* Convert the struct tm format to RTC date register fields.
@ -672,13 +652,13 @@ int up_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback)
* **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)
calalr = (rtc_bin2bcd(newalarm.tm_mday) << RTC_CALALR_DATE_SHIFT) & RTC_CALALR_DATE_MASK;
calalr |= (rtc_bin2bcd(newalarm.tm_mon+1) << RTC_CALALR_MONTH_SHIFT) & RTC_CALALR_MONTH_MASK;
calalr |= (RTC_CALALR_MTHEN | RTC_CALALR_DATEEN);
/* Set the new date */
putreg32(calalr, SAM_RTC_CALALRR);
putreg32(calalr, SAM_RTC_CALALR);
/* Write the new time */
@ -695,6 +675,7 @@ int up_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback)
ret = OK;
}
irqrestore(flags);
return ret;
}
#endif