不韋 呂
いろいろなテクニック．Nucleo と DISCO-F746 用．
Dependencies: Array_Matrix mbed
Diff: UnionExample.hpp
- Revision:
- 0:bb939e0bc6e2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/UnionExample.hpp Sun Oct 15 11:41:48 2017 +0000
@@ -0,0 +1,25 @@
+//--------------------------------------------------------------
+// "union" のテスト
+//--------------------------------------------------------------
+
+#include "mbed.h"
+
+void UnionExample()
+{
+ union Int16U8
+ {
+ int16_t v16;
+ uint8_t uv8[2];
+ };
+ Int16U8 x1, x2;
+
+ x1.uv8[0] = 1; // 下位バイト
+ x1.uv8[1] = 2; // 上位バイト
+
+ printf("\r\nx1.v16 = 0x%04X", x1.v16);
+ printf("\r\nx1.uv8[0] = 0x%02X, x1.uv8[1] = 0x%02X\r\n", x1.uv8[0], x1.uv8[1]);
+
+ x2.uv8[0] = 255;
+ x2.uv8[1] = 255;
+ printf("\r\nx2.v16 = %d\r\n", x2.v16);
+}
\ No newline at end of file