Diff: ChemIDMeasurer.cpp

Revision:

0:246ef70a9e6e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ChemIDMeasurer.cpp	Sun Feb 07 20:57:24 2021 -0800
@@ -0,0 +1,130 @@
+#include "ChemIDMeasurer.h"
+#include <cinttypes>
+
+namespace mbed
+{
+    FileHandle *mbed_override_console(int)
+    {
+        static BufferedSerial serial(USBTX, USBRX, 115200);
+        return &serial;
+    }
+}
+
+ChemIDMeasurer::ChemIDMeasurer():
+soc(I2C_SDA, I2C_SCL, 100000)
+{
+}
+
+void ChemIDMeasurer::activateCharger()
+{
+	// If you have code to activate the charger, put it here
+}
+
+void ChemIDMeasurer::deactivateCharger()
+{
+	// If you have code to deactivate the charger, put it here
+}
+
+void ChemIDMeasurer::activateLoad()
+{
+	// If you have code to activate the dummy load, put it here
+}
+
+void ChemIDMeasurer::deactivateLoad()
+{
+	// If you have code to deactivate the dummy load, put it here
+}
+
+void ChemIDMeasurer::setState(ChemIDMeasurer::State newState)
+{
+	state = newState;
+	stateTimer.reset();
+}
+
+void ChemIDMeasurer::runMeasurement()
+{
+	totalTimer.start();
+	stateTimer.start();
+
+	while(state != State::DONE)
+	{
+		// read data
+		uint16_t voltage_mV = soc.getVoltage();
+		int32_t current_mA = soc.getCurrent();
+		double temperatureC = soc.getTemperature();
+		char const * comment = "";
+
+		// update based on state
+		switch (state)
+		{
+			case State::INIT:
+				// Print header
+				printf("Elapsed Time (s), Voltage (mV), Current (mA), Temperature (deg C), SoC (%%), Comments\n");
+				setState(State::CHARGE);
+				activateCharger();
+				comment = "Activating charger and entering CHARGE";
+				break;
+
+			case State::CHARGE:
+				// threshold current = C/10
+				if(current_mA < DESIGNCAP/10)
+				{
+					deactivateCharger();
+					setState(State::RELAX_CHARGED);
+					comment = "Deactivating charger and entering RELAX_CHARGED";
+				}
+				break;
+
+			case State::RELAX_CHARGED:
+				if(stateTimer.elapsed_time() > 2h)
+				{
+                    activateLoad();
+					setState(State::DISCHARGE);
+					comment = "Done relaxing and entering discharge -- please disconnect charger and connect C/10 load now.";
+				}
+				break;
+
+			case State::DISCHARGE:
+				// Change states once we hit the termination voltage
+				if(voltage_mV < ZEROCHARGEVOLT * CELLCOUNT)
+				{
+                    deactivateLoad();
+					setState(State::RELAX_DISCHARGED);
+					comment = "Done discharging -- please remove C/10 load now.";
+				}
+				// BQ34Z100 reports positive current always, but TI's tool expects discharging to
+				// be negative current.
+				current_mA *= -1;
+				break;
+
+			case State::RELAX_DISCHARGED:
+				if(stateTimer.elapsed_time() > 5h)
+				{
+					setState(State::DONE);
+					comment = "Done!";
+				}
+				break;
+
+			default:
+				// will never be hit but here to silence warning
+				break;
+		}
+
+
+		// print data column
+		printf("%" PRIi64 ", %" PRIi16 ", %" PRIi32 ", %f, %" PRIu8 ", %s\n",
+			std::chrono::duration_cast<std::chrono::seconds>(totalTimer.elapsed_time()).count(),
+			voltage_mV, current_mA, temperatureC, soc.getSOC(), comment);
+
+		// wait, update freq is every 5 seconds
+		ThisThread::sleep_for(5s);
+	}
+}
+
+ChemIDMeasurer measurer;
+
+int main()
+{
+	measurer.runMeasurement();
+	return 0;
+}
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