heap; multitasking

1 files changed, 38 insertions, 0 deletions

diff --git a/heap.c b/heap.c
new file mode 100644
index 0000000..0433a1f
--- /dev/null
+++ b/heap.c
@@ -0,0 +1,38 @@
+#include <heap.h>
+#include <stm32l476xx.h>
+
+#define RAM_END 0x20018000
+
+//extern void *end;
+//extern uint32_t _total_ram;
+static uint32_t offset = 0;
+
+__attribute__ ((section(".data")))
+uint8_t heap[8192];
+void *end = heap;
+
+void heap_init(void)
+{
+	// what to do...
+}
+
+uint32_t heap_available(void)
+{
+	return 0;//	return _total_ram - offset;
+}
+
+void *hmalloc(uint32_t size)
+{
+	void *alloc = end + offset;
+	offset += size;
+	return alloc;
+}
+
+void *hcalloc(uint32_t count, uint32_t size)
+{
+	uint32_t total = count * size;
+	void *alloc = hmalloc(total);
+	for (uint32_t i = 0; i < total; i++)
+		((uint8_t *)alloc)[i] = 0;
+	return alloc;
+}