Building the App example/alarms

Configuring a nuttx/app is done with "make menuconfig"
I find myself churning through the options trying to find dependencies to subsystems to turn them on.
The top level readme does help - however the general directions are to do it through the menuconfigs and the following README.txt describes it in terms of #defines.
https://bitbucket.org/nuttx/apps/src/master/examples/README.txt
So this is how I enable the subsystem for my test board olimex-STM32-H307 with TTY on Uart2
On my build machine - Ubuntu 15.10
cd tools
./configure.sh olimex-stm32-h407/nsh   
cd ..

make menuconfig

Requires RTOS FeaturesàRTOS Hooksà[*] Custom board/driver initialization 

Requires, Drivers -->Timer Driver Support àRTC Driver Support

.

Debug options

* Enable Debug Features

* Enable Debug Verbose Output

* RTC Debug Output

* Stack Colouration

* Generate Debug Symbols

Application Configurationà Examples

* RTC Alarm driver example (with defaults)

App Config à NSH LibàDisable Individual cmds-->

[] Disable date   # turn off disable

If on a board that is missing the 32KHz clock, stm32F4discovery board,
 then the RTC can function with another clock

 System Type àRTC clock source  LSI or HSI. They don't survive reset for some reason.

make clean

make

and then download it over the ST-LINK.

The output with RTC debugging enabled - using the initial power on time, looks like this

Ideally needs to set up date first but will work without it eg
nsh> date -s "JULY 06 13:45:00 2016"

nsh> alarm 15

alarm_daemon started

alarm_daemon: Running

Oprtc_dumpregs: *** Reading Time:

rtc_dumpregs:       TR: 00003532

rtc_dumpregs:       DR: 00002101

rtc_dumpregs:       CR: 00001100

rtc_dumpregs:      ISR: 00000127

rtc_dumpregs:     PRER: 007f00ff

rtc_dumpregs:     WUTR: 0000ffff

rtc_dumpregs:   CALIBR: 00000000

rtc_dumpregs:   ALRMAR: 80003333

rtc_dumpregs:   ALRMBR: 00000000

rtc_dumpregs:   SHIFTR: 00000000

rtc_dumpregs:     TSTR: 00000000

rtc_dumpregs:     TSDR: 00000000

rtc_dumpregs:    TSSSR: 00000000

rtc_dumpregs:     CALR: 00000000

rtc_dumpregs:    TAFCR: 00000000

rtc_dumpregs: ALRMASSR: 00000000

rtc_dumpregs: ALRMBSSR: 00000000

rtc_dumpregs: MAGICREG: facefeee

rtc_dumpregs: EXTI (RTSR FTSR ISR EVT): 1011

rtc_dumptime: Returning:

rtc_dumptime:   tm_sec: 00000020

rtc_dumptime:   tm_min: 00000023

rtc_dumptime:  tm_hour: 00000000

rtc_dumptime:  tm_mday: 00000001

rtc_dumptime:   tm_mon: 00000000

rtc_dumptime:  tm_year: 00000064

rtc_dumptime: New alarm time:

rtc_dumptime:   tm_sec: 00000030

rtc_dumptime:   tm_min: 00000023

rtc_dumptime:  tm_hour: 00000000

rtc_dumptime:  tm_mday: 00000001

rtc_dumptime:   tm_mon: 00000000

rtc_dumptime:  tm_year: 00000064
irtc_dumpregs: *** Set AlarmA:

rtc_dumpregs:       TR: 00003532

rtc_dumpregs:       DR: 00002101

rtc_dumpregs:       CR: 00001100

rtc_dumpregs:      ISR: 00000027

rtc_dumpregs:     PRER: 007f00ff

rtc_dumpregs:     WUTR: 0000ffff

rtc_dumpregs:   CALIBR: 00000000

rtc_dumpregs:   ALRMAR: 80003548

rtc_dumpregs:   ALRMBR: 00000000

rtc_dumpregs:   SHIFTR: 00000000

rtc_dumpregs:     TSTR: 00000000

rtc_dumpregs:     TSDR: 00000000

rtc_dumpregs:    TSSSR: 00000000

rtc_dumpregs:     CALR: 00000000

rtc_dumpregs:    TAFCR: 00000000

rtc_dumpregs: ALRMASSR: 00000000

rtc_dumpregs: ALRMBSSR: 00000000

rtc_dumpregs: MAGICREG: facefeee

rtc_dumpregs: EXTI (RTSR FTSR ISR EVT): 1011

ng /dev/rtc0

rtchw_set_alrmar:   TR: 00003532 ALRMAR: 80003548

Alarm set in 15 seconds

nsh>

(then when the alarm goes off)

rtc_dumpregs: *** Reading Time:

rtc_dumpregs:       TR: 00003548

rtc_dumpregs:       DR: 00002101

rtc_dumpregs:       CR: 00001100

rtc_dumpregs:      ISR: 00000127

rtc_dumpregs:     PRER: 007f00ff

rtc_dumpregs:     WUTR: 0000ffff

rtc_dumpregs:   CALIBR: 00000000

rtc_dumpregs:   ALRMAR: 80003548

rtc_dumpregs:   ALRMBR: 00000000

rtc_dumpregs:   SHIFTR: 00000000

rtc_dumpregs:     TSTR: 00000000

rtc_dumpregs:     TSDR: 00000000

rtc_dumpregs:    TSSSR: 00000000

rtc_dumpregs:     CALR: 00000000

rtc_dumpregs:    TAFCR: 00000000

rtc_dumpregs: ALRMASSR: 00000000

rtc_dumpregs: ALRMBSSR: 00000000

rtc_dumpregs: MAGICREG: facefeee

rtc_dumpregs: EXTI (RTSR FTSR ISR EVT): 1011

rtc_dumptime: Returning:

rtc_dumptime:   tm_sec: 00000030

rtc_dumptime:   tm_min: 00000023

rtc_dumptime:  tm_hour: 00000000

rtc_dumptime:  tm_mday: 00000001

rtc_dumptime:   tm_mon: 00000000

rtc_dumptime:  tm_year: 00000064

alarm_demon: alarm 0 received