timer break feature and demo. #173

examples/timer_interrupts/timer_interrupts.cpp

@@ -72,7 +72,7 @@ class TimerInterruptsTest  {
       _ledState=false;
 
       /*
-       * Set ourselves up as an observer for interrupts raised by the timer class.
+       * Set ourselves up as a subscriber for interrupts raised by the timer class.
        */
 
       timer.TimerInterruptEventSender.insertSubscriber(
@@ -113,7 +113,7 @@ class TimerInterruptsTest  {
     }
 
     /*
-     * Observer callback function. This is called when the update interrupt that we've
+     * Subscriber callback function. This is called when the update interrupt that we've
      * enabled is fired.
      */
 

examples/timer_pwm_break/.gitignore

@@ -0,0 +1,59 @@
+doc/
+*~
+*.lock
+*.DS_Store
+*.swp
+*.out
+*.class
+#OS junk files
+[Tt]humbs.db
+
+*.a
+*.o
+
+#Visual Studio files
+
+*.[Oo]bj
+*.user
+*.aps
+*.pch
+*.vspscc
+*.vssscc
+*_i.c
+*_p.c
+*.ncb
+*.suo
+*.tlb
+*.tlh
+*.bak
+*.[Cc]ache
+*.ilk
+*.log
+*.lib
+*.sbr
+*.sdf
+*.opensdf
+ipch/
+obj/
+[Bb]in
+[Dd]ebug*/
+[Rr]elease*/
+Ankh.NoLoad
+
+#Tooling
+_ReSharper*/
+*.resharper
+[Tt]est[Rr]esult*
+
+#Project files
+[Bb]uild/
+
+#Subversion files
+.svn
+
+# Office Temp Files
+~$*
+
+# eclipse local settings
+
+.settings/

examples/timer_pwm_break/.project

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>stm32plus-examples-timer_pwm_break</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
+			<triggers>clean,full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
+			<triggers>full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.cdt.core.cnature</nature>
+		<nature>org.eclipse.cdt.core.ccnature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
+	</natures>
+</projectDescription>

examples/timer_pwm_break/SConscript

@@ -0,0 +1,108 @@
+#
+# SConscript build file for an stm32plus example. Called automatically by the SConstruct
+# in the parent directory
+#
+
+import os
+
+# import everything exported in SConstruct
+
+Import('*')
+
+# get a copy of the environment
+
+env=env.Clone()
+
+# verify that this example is compatible with the selected MCU
+
+sconscriptFile=(lambda x:x).func_code.co_filename
+sconscriptDir=os.path.dirname(sconscriptFile)
+compatFile=os.path.join(sconscriptDir,"compat.txt");
+
+supported=True
+if os.path.exists(compatFile):
+  supported=False
+  for line in open(compatFile,"r"):
+    line=line.rstrip()
+    if not line.startswith("#") and line==mcu:
+      supported=True
+      break
+
+if supported:
+
+  # get all the sources
+
+  matches=[]
+  matches.append(Glob("*.cpp"))
+  matches.append(Glob("*.c"))
+  matches.append(Glob("*.asm"))
+  matches.append("system/LibraryHacks.cpp")
+
+  # handle MCU differences
+
+  if mcu.startswith("f4"):
+    matches.append("system/f407_168_8/Startup.asm")
+    matches.append("system/f407_168_8/System.c")
+    linkerscript="examples/"+example+"/system/f407_168_8/Linker.ld"
+
+  elif mcu=="f1hd":
+    matches.append("system/f1hd_72_8/Startup.asm")
+    matches.append("system/f1hd_72_8/System.c")
+    linkerscript="examples/"+example+"/system/f1hd_72_8/Linker.ld"
+
+  elif mcu=="f1cle":
+    matches.append("system/f107_72_8/Startup.asm")
+    matches.append("system/f107_72_8/System.c")
+    linkerscript="examples/"+example+"/system/f107_72_8/Linker.ld"
+
+  elif mcu=="f1md":
+    matches.append("system/f1md/Startup.asm")
+    matches.append("system/f1md/System.c")
+    linkerscript="examples/"+example+"/system/f1md/Linker.ld"
+
+  elif mcu=="f1mdvl":
+    matches.append("system/f1mdvl_24_8/Startup.asm")
+    matches.append("system/f1mdvl_24_8/System.c")
+    linkerscript="examples/"+example+"/system/f1mdvl_24_8/Linker.ld"
+
+  elif mcu=="f042":
+    matches.append("system/f042_48_8/Startup.asm")
+    matches.append("system/f042_48_8/System.c")
+    linkerscript="examples/"+example+"/system/f042_48_8/Linker.ld"
+
+  elif mcu=="f051":
+    matches.append("system/f051_48_8/Startup.asm")
+    matches.append("system/f051_48_8/System.c")
+    linkerscript="examples/"+example+"/system/f051_48_8/Linker.ld"
+
+  elif mcu=="f030":
+    matches.append("system/f030_48_8/Startup.asm")
+    matches.append("system/f030_48_8/System.c")
+    linkerscript="examples/"+example+"/system/f030_48_8/Linker.ld"
+
+  buildoutdir="examples/"+example+"/build/"+systemprefix
+
+  # set the additional linker flags
+
+  env.Append(LINKFLAGS=["-T"+linkerscript,"-Wl,-wrap,__aeabi_unwind_cpp_pr0","-Wl,-wrap,__aeabi_unwind_cpp_pr1","-Wl,-wrap,__aeabi_unwind_cpp_pr2"])
+
+  # additional include directory for the graphics
+
+  env.Append(ASFLAGS="-Iexamples/"+example)
+
+  # unique additions for this example
+
+  env.Append(CPPPATH="#examples/"+example)
+
+  # trigger a build with the correct library name
+
+  elf=env.Program(example+".elf",matches)
+  hex=env.Command(example+".hex",elf,"arm-none-eabi-objcopy -O ihex "+buildoutdir+"/"+example+".elf "+buildoutdir+"/"+example+".hex")
+  bin=env.Command(example+".bin",elf,"arm-none-eabi-objcopy -O binary "+buildoutdir+"/"+example+".elf "+buildoutdir+"/"+example+".bin")
+  lst=env.Command(example+".lst",elf,"arm-none-eabi-objdump -h -S "+buildoutdir+"/"+example+".elf > "+buildoutdir+"/"+example+".lst")
+  size=env.Command(example+".size",elf,"arm-none-eabi-size --format=berkeley "+buildoutdir+"/"+example+".elf | tee "+buildoutdir+"/"+example+".size")
+
+  # install the library if the user gave the install option
+
+  EXAMPLEINSTALLDIR=INSTALLDIR+"/examples/"+example+"/"+systemprefix
+  env.Alias("install",env.Install(EXAMPLEINSTALLDIR,[elf,hex,bin,lst,size]))

examples/timer_pwm_break/system/LibraryHacks.cpp

@@ -0,0 +1,95 @@
+/*
+ * LibraryHacks.cpp
+ *
+ *  Created on: 23 Jan 2011
+ *      Author: Andy
+ */
+
+#include <cstdlib>
+#include <sys/types.h>
+
+
+/*
+ * The default pulls in 70K of garbage
+ */
+
+namespace __gnu_cxx {
+
+  void __verbose_terminate_handler() {
+    for(;;);
+  }
+}
+
+
+/*
+ * The default pulls in about 12K of garbage
+ */
+
+extern "C" void __cxa_pure_virtual() {
+  for(;;);
+}
+
+
+/*
+ * Implement C++ new/delete operators using the heap
+ */
+
+void *operator new(size_t size) {
+  return malloc(size);
+}
+
+void *operator new(size_t,void *ptr) {
+  return ptr;
+}
+
+void *operator new[](size_t size) {
+  return malloc(size);
+}
+
+void *operator new[](size_t,void *ptr) {
+  return ptr;
+}
+
+void operator delete(void *p) {
+  free(p);
+}
+
+void operator delete[](void *p) {
+  free(p);
+}
+
+
+/*
+ * EABI builds can generate reams of stack unwind code for system generated exceptions
+ * e.g. (divide-by-zero). Since we don't support exceptions we'll wrap out these
+ * symbols and save a lot of flash space.
+ */
+
+extern "C" void __wrap___aeabi_unwind_cpp_pr0() {}
+extern "C" void __wrap___aeabi_unwind_cpp_pr1() {}
+extern "C" void __wrap___aeabi_unwind_cpp_pr2() {}
+
+
+/*
+ * sbrk function for getting space for malloc and friends
+ */
+
+extern int  _end;
+
+extern "C" {
+  caddr_t _sbrk ( int incr ) {
+
+    static unsigned char *heap = NULL;
+    unsigned char *prev_heap;
+
+    if (heap == NULL) {
+      heap = (unsigned char *)&_end;
+    }
+    prev_heap = heap;
+    /* check removed to show basic approach */
+
+    heap += incr;
+
+    return (caddr_t) prev_heap;
+  }
+}