Lauren Alexander
FSRforCookieJar
Fork of
FSR
by 
Chenkai Shao
Diff: FSR.cpp
- Revision:
- 0:d24a38523990
- Child:
- 1:6b702226a5d3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/FSR.cpp Wed Oct 21 21:14:06 2015 +0000
@@ -0,0 +1,34 @@
+#include "FSR.h"
+#include "mbed.h"
+
+FSR::FSR(PinName pin, float resistance) : _ain(pin), _r(resistance)
+{
+}
+
+float FSR::readRaw()
+{
+ float read = _ain;
+ return read;
+}
+
+float FSR::readFSRResistance()
+{
+ float read = _ain;
+ return _r * 3.3 / read - _r;
+}
+
+float FSR::readWeight()
+{
+ float read = _ain;
+ float rfsr = _r * 3.3 / read - _r;
+ float slope = (4 - 2) / (log10(6.2) - log10(0.25));
+ float a = log10(rfsr);
+ if (a < log10(6.2))
+ {
+ return pow(10, ((log10(6.2) - a) * slope + 2));
+ }
+ else
+ {
+ return 0;
+ }
+}
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