Add PM support for the STM32F4Discovery -- still a work in progress

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4976 42af7a65-404d-4744-a932-0658087f49c3

ChangeLog

@@ -3065,4 +3065,7 @@
 	* include/termios.h and lib/termios/*:  Replace cfsetispeed and cfsetospeed with
 	  cfsetspeed (with definitions for the input/outputs in termios.h).  Same for
 	  cfgetispeed and cfgetospeed.
+	* configs/stm32f4discovery/src and configs/stm32f4discovery/pm:  Add a power
+	  management configuration for the STM32F4Discovery and supporting logic.  This
+	  check-in also includes some fixes for the F4 RTC alarm logic.
 

arch/arm/src/stm32/stm32f40xxx_rtc.c

@@ -626,8 +626,8 @@ int up_rtcinitialize(void)
 
   /* Then attach the ALARM interrupt handler */
 
-  irq_attach(STM32_IRQ_RTC, rtc_interrupt);
-  up_enable_irq(STM32_IRQ_RTC);
+  irq_attach(STM32_IRQ_RTC_WKUP, rtc_interrupt);
+  up_enable_irq(STM32_IRQ_RTC_WKUP);
 #endif
 
   g_rtc_enabled = true;
@@ -813,7 +813,7 @@ int up_rtc_settime(FAR const struct timespec *tp)
  ************************************************************************************/
 
 #ifdef CONFIG_RTC_ALARM
-int up_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback);
+int up_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback)
 {
   irqstate_t flags;
   int ret = -EBUSY;

configs/stm32f4discovery/README.txt

@@ -1070,3 +1070,50 @@ Where <subdir> is one of the following:
       CONFIG_STM32_CODESOURCERYW=y : CodeSourcery under Windows
 
     NOTE: As of this writing, I have not seen the LCD work!
+
+  pm:
+  --
+    This is a configuration that is used to test STM32 power management, i.e.,
+    to test that the board can go into lower and lower states of power usage
+    as a result of inactivity.  This configuration is based on the nsh2
+    configuration with modifications for testing power management.  This
+    configuration should provide some guideline for power management in your
+    STM32 application.
+
+      CONFIG_STM32_CODESOURCERYW=y  : CodeSourcery under Windows
+
+    CONFIG_PM_CUSTOMINIT and CONFIG_IDLE_CUSTOM are necessary parts of the
+    PM configuration:
+
+      CONFIG_PM_CUSTOMINIT=y
+
+    CONFIG_PM_CUSTOMINIT moves the PM initialization from arch/arm/src/stm32/stm32_pminitialiaze.c
+    to configs/stm3210-eval/src/up_pm.c.  This allows us to support board-
+    specific PM initialization.
+
+      CONFIG_IDLE_CUSTOM=y
+
+    The bulk of the PM activities occur in the IDLE loop.  The IDLE loop is
+    special because it is what runs when there is no other task running.  Therefore
+    when the IDLE executes, we can be assure that nothing else is going on; this
+    is the ideal condition for doing reduced power management.
+
+    The configuration CONFIG_IDLE_CUSTOM allows us to "steal" the normal STM32
+    IDLE loop (of arch/arm/src/stm32/stm32_idle.c) and replace this with our own
+    custom IDLE loop (at configs/stm3210-eval/src/up_idle.c).
+
+    Here are some additional things to note in the configuration:
+
+      CONFIG_PM_BUTTONS=y
+
+    CONFIG_PM_BUTTONS enables button support for PM testing.  Buttons can drive
+    EXTI interrupts and EXTI interrrupts can be used to wakeup for certain reduced
+    power modes (STOP mode).  The use of the buttons here is for PM testing purposes
+    only; buttons would normally be part the application code and CONFIG_PM_BUTTONS
+    would not be defined.
+
+      CONFIG_RTC_ALARM=y
+
+    The RTC alarm is used to wake up from STOP mode and to transition to
+    STANDBY mode.  This used of the RTC alarm could conflict with other uses of
+    the RTC alarm in your application.

configs/stm32f4discovery/nsh/Make.defs

@@ -104,14 +104,14 @@ ifeq ($(WINTOOL),y)
   MKDEP = $(TOPDIR)/tools/mknulldeps.sh
   ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
   ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
-  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/nsh/$(LDSCRIPT)}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
   MAXOPTIMIZATION = -O2
 else
   # Linux/Cygwin-native toolchain 
   MKDEP = $(TOPDIR)/tools/mkdeps.sh
   ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
   ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
-  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/nsh/$(LDSCRIPT)
+  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
 endif
 
 CC = $(CROSSDEV)gcc

configs/stm32f4discovery/nxlines/Make.defs

@@ -104,14 +104,14 @@ ifeq ($(WINTOOL),y)
   MKDEP = $(TOPDIR)/tools/mknulldeps.sh
   ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
   ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
-  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/nxlines/$(LDSCRIPT)}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
   MAXOPTIMIZATION = -O2
 else
   # Linux/Cygwin-native toolchain 
   MKDEP = $(TOPDIR)/tools/mkdeps.sh
   ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
   ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
-  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/nxlines/$(LDSCRIPT)
+  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
 endif
 
 CC = $(CROSSDEV)gcc

configs/stm32f4discovery/ostest/Make.defs

@@ -104,14 +104,14 @@ ifeq ($(WINTOOL),y)
   MKDEP = $(TOPDIR)/tools/mknulldeps.sh
   ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
   ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
-  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/ostest/$(LDSCRIPT)}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
   MAXOPTIMIZATION = -O2
 else
   # Linux/Cygwin-native toolchain 
   MKDEP = $(TOPDIR)/tools/mkdeps.sh
   ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
   ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
-  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/ostest/$(LDSCRIPT)
+  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
 endif
 
 CC = $(CROSSDEV)gcc