Diff: coil-driver.cpp

Revision:

0:9b2c760c8e5c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/coil-driver.cpp	Tue Jul 25 14:29:20 2017 +0000
@@ -0,0 +1,49 @@
+// Begin sample code
+/*
+#include "mbed.h"
+#include "rtos.h"
+#include "coil-driver.h"
+// Coil parameters [control pin, spike time (us), hold time period (us), hold time pulse width (us)]
+Coil orange(A0, 500, 40, 3); // Valve driven by pin A0, 500us spike time, 25kHz PWM at 7.5% duty cycle
+
+Coil yellow(A1, 5000, 40, 6); // Valve driven by pin A1, 5ms spike time, 25kHz PWM at 15% duty cycle
+
+int main()
+{
+    while (true) {
+        orange.on();
+        yellow.on();
+        Thread::wait(500);
+        orange.off();
+        yellow.off();
+        Thread::wait(500);
+    }
+}
+*/
+// End sample code
+
+#include "coil-driver.h"
+
+// Default constructor
+Coil::Coil(PinName _controlPin, uint16_t _spikeus, uint16_t _holdperiod_us, uint16_t _holdpulse_us)
+    :   controlOut(_controlPin),
+        spikeus(_spikeus),
+        holdperiod_us(_holdperiod_us),
+        holdpulse_us(_holdpulse_us)
+{
+    controlOut.write(0.0); // Ensure coil output is off by default
+    controlOut.period_us(holdperiod_us); // PWM control period (uint16_t microseconds)
+
+};
+
+void Coil::on()
+{
+    controlOut.write(1.0);
+    wait_us(spikeus);
+    controlOut.pulsewidth_us(holdpulse_us);
+}
+
+void Coil::off()
+{
+    controlOut.write(0.0);
+}
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