Implemented timer functionality for delay purposes

Author: AaronPerl

AstroKey.hwconf

@@ -11,6 +11,7 @@
     <property object="DefaultMode" propertyId="mode.diagramLocation" value="100, 100"/>
     <property object="INTERRUPT_0" propertyId="ABPeripheral.included" value="true"/>
     <property object="INTERRUPT_0" propertyId="interrupt.interruptenable.enableallinterrupts" value="Enabled"/>
+    <property object="INTERRUPT_0" propertyId="interrupt.interruptenable.enabletimer2interrupt" value="Enabled"/>
     <property object="INTERRUPT_0" propertyId="interruptenables.codegenerationoptions.generateinterruptfunctions" value="Disabled"/>
     <property object="P0.0" propertyId="ports.settings.label" value="S0"/>
     <property object="P0.0" propertyId="ports.settings.skip" value="Skipped"/>
@@ -28,6 +29,20 @@
     <property object="SPI_0" propertyId="spi.clockrate.sysclk" value="24.500 MHz"/>
     <property object="SPI_0" propertyId="spi.clockrate.sysclkdividercoefficientspi0ckr" value="7"/>
     <property object="SPI_0" propertyId="spi.control.slaveselectmode" value="Slave or master 3-wire mode"/>
+    <property object="TIMER01_0" propertyId="ABPeripheral.included" value="true"/>
+    <property object="TIMER16_2" propertyId="ABPeripheral.included" value="true"/>
+    <property object="TIMER16_2" propertyId="timer16.control.runcontrol" value="Start"/>
+    <property object="TIMER16_2" propertyId="timer16.control.timerrunningstate" value="Timer is Running"/>
+    <property object="TIMER16_2" propertyId="timer16.highbyte.highbyte" value="240"/>
+    <property object="TIMER16_2" propertyId="timer16.initandreloadvalue.targetoverflowfrequency" value="1000"/>
+    <property object="TIMER16_2" propertyId="timer16.initandreloadvalue.timerinitvalue" value="61536"/>
+    <property object="TIMER16_2" propertyId="timer16.initandreloadvalue.timerreloadvalue" value="61536"/>
+    <property object="TIMER16_2" propertyId="timer16.lowbyte.lowbyte" value="96"/>
+    <property object="TIMER16_2" propertyId="timer16.reloadhighbyte.reloadhighbyte" value="240"/>
+    <property object="TIMER16_2" propertyId="timer16.reloadlowbyte.reloadlowbyte" value="96"/>
+    <property object="TIMER16_3" propertyId="ABPeripheral.included" value="true"/>
+    <property object="TIMER16_4" propertyId="ABPeripheral.included" value="true"/>
+    <property object="TIMER_SETUP_0" propertyId="ABPeripheral.included" value="true"/>
     <property object="USBLIB_0" propertyId="ABPeripheral.included" value="true"/>
     <property object="USBLIB_0" propertyId="configuration.configurationparameters.configurationstring" value=""/>
     <property object="USBLIB_0" propertyId="configuration.configurationparameters.devicepower" value="Bus-Powered"/>

inc/delay.h

@@ -0,0 +1,16 @@
+/*
+ * delay.h
+ *
+ *  Created on: Dec 2, 2017
+ *      Author: Aaron
+ */
+
+#ifndef INC_DELAY_H_
+#define INC_DELAY_H_
+
+#include <stdint.h>
+
+uint32_t getMillis();
+void resetMillis();
+
+#endif /* INC_DELAY_H_ */

src/delay.c

@@ -0,0 +1,22 @@
+#include "SI_EFM8UB1_Register_Enums.h"
+#include "delay.h"
+
+static volatile uint32_t millis = 0;
+
+uint32_t getMillis()
+{
+  return millis;
+}
+
+void resetMillis()
+{
+  millis = 0;
+}
+
+SI_INTERRUPT(timer2ISR, TIMER2_IRQn)
+{
+  // Increment millisecond counter
+  millis++;
+  // Clear interrupt flag
+  TMR2CN0 &= ~(TMR2CN0_TF2H__SET | TMR2CN0_TF2L__SET);
+}