Reed Kimble
Simple wrapper object for LTC2606 1CH 16Bit DAC. Instantiate DacLtc2606 object instance passing reference to mbed.I2C object instance. Call write() method on DacLtc2606 instance passing 16Bit integer (0 [Off] to 32767/-32768 [Half-On] to -1 [Full-On]) to set DAC output.
Diff: DacLtc2606.cpp
- Revision:
- 0:896aaf4b80d0
- Child:
- 1:5924632f3344
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DacLtc2606.cpp Thu Sep 13 23:07:18 2012 +0000
@@ -0,0 +1,37 @@
+
+#include "DacLtc2606.h"
+#include "mbed.h"
+
+DacLtc2606::DacLtc2606(I2C i2c) : _i2c(i2c)
+{
+}
+
+bool DacLtc2606::write(int value)
+{
+ int opR;
+ char args[3];
+ args[0] = _command;
+ args[1] = (value >> 8) & 0xFF;
+ args[2] = value & 0xFF;
+ opR = _i2c.write(_slave, args, 3, false);
+ return (opR == 0) ? true : false;
+}
+
+bool DacLtc2606::write(double percent)
+{
+ if((percent >= 0.0) & (percent <= 1.0))
+ {
+ int value = 0;
+ if(percent < 0.5)
+ {
+ value = 32767.0 * (percent * 2);
+ }
+ else
+ {
+ value = -32768.0 * ((1.0 - percent) * 2);
+ if(value == 0) {value = -1;}
+ }
+ return write(value);
+ }
+ return false;
+}
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