From 9f17335c19a6ae91a450e267b5313148644a7a14 Mon Sep 17 00:00:00 2001
From: Josh Rahm <joshuarahm@gmail.com>
Date: Mon, 16 Nov 2020 18:20:32 -0700
Subject: Add DMA header file which defines the DMA registers and add
 testing_harness with fake environment to allow testing on x86 development
 machines.

---
 02-usart/tests/test_dma.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 02-usart/tests/test_dma.c

(limited to '02-usart/tests/test_dma.c')

diff --git a/02-usart/tests/test_dma.c b/02-usart/tests/test_dma.c
new file mode 100644
index 0000000..7c2127a
--- /dev/null
+++ b/02-usart/tests/test_dma.c
@@ -0,0 +1,27 @@
+#include "test_harness.h"
+#include "dma.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <memory.h>
+
+TEST(dma, smoke) {
+  dma_t* dma = &DMA1;
+  memset(dma, sizeof(dma), 0);
+
+  dma->is_bf.tcif1 = 1;
+  ASSERT_EQ(dma->is_r, 2);
+
+  dma->is_bf.htif7 = 1;
+  ASSERT_EQ(dma->is_r, 67108866);
+}
+
+TEST(dma, correct_align)
+{
+  dma_t dma;
+
+  // Assert the DMA registers are aligned with what the spec says.
+  ASSERT_EQ((long)(&dma.csel_r) - (long)(&dma), 0xA8);
+
+  return 0;
+}
-- 
cgit