From 0f23dacaef1fcd52573805a1ace817066a4ede93 Mon Sep 17 00:00:00 2001
From: Karl Palsson <karlp@tweak.net.au>
Date: Sun, 24 Mar 2019 08:55:28 +0000
Subject: add missing asm demo files.

that was lame, sorry about that.
---
 my-common-code/api-asm.S | 19 +++++++++++++++++++
 my-common-code/api-asm.h |  7 +++++++
 2 files changed, 26 insertions(+)
 create mode 100644 my-common-code/api-asm.S
 create mode 100644 my-common-code/api-asm.h

diff --git a/my-common-code/api-asm.S b/my-common-code/api-asm.S
new file mode 100644
index 0000000..93419fd
--- /dev/null
+++ b/my-common-code/api-asm.S
@@ -0,0 +1,19 @@
+/* 
+ * Example of a pure assembly file
+ * For most people, this is normally unnecessary, you can use inline
+ * ASM in a C file, if you even need to use ASM at all.
+ * However, if you reallllly like doing this sort of thing, here's how :)
+ */
+
+.syntax unified
+.thumb
+.section .text
+
+#include <libopencm3/stm32/gpio.h>
+
+.global rev_bytes
+.func rev_bytes  /* only used for debugger */
+.type rev_bytes, STT_FUNC
+rev_bytes:
+    rev r0, r0
+    bx lr
diff --git a/my-common-code/api-asm.h b/my-common-code/api-asm.h
new file mode 100644
index 0000000..b153620
--- /dev/null
+++ b/my-common-code/api-asm.h
@@ -0,0 +1,7 @@
+#include <stdint.h>
+/**
+ * Reverse bytes in words
+ * @param in word in form abcd
+ * @returns word in form dcba
+ */
+uint32_t rev_bytes(uint32_t in);
-- 
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