Revision 0:f99d1aa55201, committed 2015-01-20

Comitter:

LORDTEK

Date:

Tue Jan 20 14:45:08 2015 +0000

Commit message:

Single Precision Floating Point converter makes it readable

Changed in this revision

diff -r 000000000000 -r f99d1aa55201 SP_FP.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SP_FP.cpp	Tue Jan 20 14:45:08 2015 +0000
@@ -0,0 +1,18 @@
+#include "SP_FP.h"
+#include "mbed.h"
+
+SP_FP::SP_FP() {
+    result = 0.0f;
+    value_Temp = 0;
+}
+
+float SP_FP::decoder(uint32_t VALUE) {
+    (VALUE >> 31) ? result = -1.0f : result = 1.0f;  // Determine sign
+    value_Temp = VALUE << 1;  // Delete sign bit
+    value_Temp = value_Temp >> 24;  // Make it alone only exponent
+    result *= pow(2.0f, ((float) ((int) value_Temp - 127)));  // E (will be pow of 2) = X - 127
+    value_Temp = VALUE << 9;  // Delete after 23rd bit
+    value_Temp = value_Temp >> 9;  // Make it alone only mantissa (fraction, significand)
+    result *= 1.0f + (float) value_Temp / 8388608.0f;  // pow(2.0, 23.0) thanks to http://softelectro.ru
+    return result;
+}
\ No newline at end of file

diff -r 000000000000 -r f99d1aa55201 SP_FP.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SP_FP.h	Tue Jan 20 14:45:08 2015 +0000
@@ -0,0 +1,15 @@
+#ifndef SP_FP_H
+#define SP_FP_H
+#include "mbed.h"
+
+class SP_FP {
+public:
+    SP_FP();
+    float decoder(uint32_t VALUE);
+
+private:
+    float result;
+    uint32_t value_Temp;  // Needed because of bitwise operations
+};
+
+#endif
\ No newline at end of file