4 files changed, 52 insertions, 1 deletions
diff --git a/02-usart/tests/test_dma.c b/02-usart/tests/test_dma.c
index 7704590..ae34a69 100644
--- a/02-usart/tests/test_dma.c
+++ b/02-usart/tests/test_dma.c
@@ -1,5 +1,5 @@
 #include "test_harness.h"
-#include "dma.h"
+#include "core/dma.h"
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/02-usart/tests/test_lib.c b/02-usart/tests/test_lib.c
new file mode 100644
index 0000000..8d63577
--- /dev/null
+++ b/02-usart/tests/test_lib.c
@@ -0,0 +1,19 @@
+#include "test_harness.h"
+#include "lib.h"
+
+TEST(lib, hexify)
+{
+  char buf[10];
+
+  hexify(0xaaaaaaaa, buf);
+  ASSERT_EQ_STR(buf, "AAAAAAAA");
+
+  hexify(0xdddddddd, buf);
+  ASSERT_EQ_STR(buf, "DDDDDDDD");
+
+  hexify(0x02468ace, buf);
+  ASSERT_EQ_STR(buf, "02468ACE");
+
+  hexify(0xdeadbeef, buf);
+  ASSERT_EQ_STR(buf, "DEADBEEF");
+}
diff --git a/02-usart/tests/test_memory.c b/02-usart/tests/test_memory.c
new file mode 100644
index 0000000..e62877a
--- /dev/null
+++ b/02-usart/tests/test_memory.c
@@ -0,0 +1,12 @@
+#include "test_harness.c"
+#include "memory.h"
+
+TEST(memory, memcpy)
+{
+  const char* from = "Hello";
+  char to[16];
+
+  memcpy(to, from, 6);
+
+  ASSERT_EQ_STR(to, from);
+}
diff --git a/02-usart/tests/test_usart.c b/02-usart/tests/test_usart.c
new file mode 100644
index 0000000..e2cfdf8
--- /dev/null
+++ b/02-usart/tests/test_usart.c
@@ -0,0 +1,20 @@
+#include "test_harness.h"
+#include "core/usart.h"
+
+#include <stdlib.h>
+
+TEST(usart, enable_dma)
+{
+  __IO usart_t* usart = &USART1;
+
+  usart->c_r3 = 0;
+
+  usart_enable_dma(usart, USART_ENABLE_TX);
+  ASSERT_EQ(usart->c_r3, 128);
+
+  usart_enable_dma(usart, USART_ENABLE_RX);
+  ASSERT_EQ(usart->c_r3, 192);
+
+  usart_enable_dma(usart, USART_ENABLE_DISABLED);
+  ASSERT_EQ(usart->c_r3, 0);
+}