Merge changes Ib331bae9,I9d5000cd,I65ab7310,Ifbe11515,I1edddefd, ...

* changes:
  Organize the build system
  [ion/device] Enable powering the LCD controller from a GPIO
  [liba] Enable malloc/free logging
  [ion] Fix the C API
  [ion] Fix the blackbox platform
  [ion] Add a C bridge for the logging function
  [ion] Implement Log::print using SWO on the device

liba/Makefile

@@ -1,5 +1,9 @@
 SFLAGS += -Iliba/include
 
+ifeq ($(LIBA_LOG_DYNAMIC_MEMORY),1)
+SFLAGS += -DLIBA_LOG_DYNAMIC_MEMORY=1
+endif
+
 liba/src/external/sqlite/mem5.o: CFLAGS += -w
 
 objs += $(addprefix liba/src/, \

liba/src/malloc.c

@@ -2,6 +2,20 @@
 #include <string.h>
 #include <private/memconfig.h>
 
+#if LIBA_LOG_DYNAMIC_MEMORY
+#include <stdint.h>
+#include <ion/c.h>
+
+void write_uint32_in_buffer(uint32_t n, char * buffer) {
+  for (int i=0; i<2*sizeof(uint32_t); i++) {
+    unsigned char v = (n & 0xF);
+    char c = (v>9) ? 'A'+v-10 : '0'+v;
+    buffer[2*sizeof(uint32_t)-1-i] = c;
+    n = n >> 4;
+  }
+}
+#endif
+
 extern char _heap_start;
 extern char _heap_end;
 
@@ -26,6 +40,11 @@ static void configure_heap() {
 }
 
 void free(void *ptr) {
+#if LIBA_LOG_DYNAMIC_MEMORY
+  char message[5+2*sizeof(uint32_t)+1] = {'F', 'R', 'E', 'E', '-'};
+  write_uint32_in_buffer((uint32_t)ptr, message+5);
+  ion_log_print(message);
+#endif
   if (ptr != NULL) {
     memsys5FreeUnsafe(ptr);
   }
@@ -39,6 +58,14 @@ void * malloc(size_t size) {
   if (size > 0) {
     p = memsys5MallocUnsafe(memsys5Roundup(size));
   }
+#if LIBA_LOG_DYNAMIC_MEMORY
+  char message[7+2*sizeof(uint32_t)+1+2*sizeof(uint32_t)+1] = {'M','A','L','L','O','C','-'};
+  write_uint32_in_buffer((uint32_t)p, message+7);
+  message[7+2*sizeof(uint32_t)] = '-';
+  write_uint32_in_buffer(size, message+7+2*sizeof(uint32_t)+1);
+  message[7+2*sizeof(uint32_t)+1+2*sizeof(uint32_t)] = 0;
+  ion_log_print(message);
+#endif
   return p;
 }