-/* Copyright (C) 2011 by Jacob Alexander
+/* Copyright (C) 2011-2013 by Jacob Alexander
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
// ----- Includes -----
-// AVR Includes
-#include <avr/io.h>
-#include <avr/interrupt.h>
+// Compiler Includes
+#include <Lib/MainLib.h>
// Project Includes
#include <macro.h>
#include <scan_loop.h>
-#include <usb_com.h>
+#include <output_com.h>
#include <led.h>
#include <print.h>
// ----- Macros -----
+#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
+#endif
inline void pinSetup(void)
{
+// AVR
+#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
+
// For each pin, 0=input, 1=output
#if defined(__AVR_AT90USB1286__)
DDRA = 0x00;
PORTD = 0x00;
PORTE = 0x00;
PORTF = 0x00;
+
+// ARM
+#elif defined(_mk20dx128_)
+ // TODO - Should be cleared, but not that necessary due to the pin layout
+#endif
}
-int main(void)
+
+inline void usbTimerSetup(void)
{
+// AVR
+#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
+
// Setup with 16 MHz clock
CPU_PRESCALE( 0 );
+ // Setup ISR Timer for flagging a kepress send to USB
+ // Set to 256 * 1024 (8 bit timer with Clock/1024 prescalar) timer
+ TCCR0A = 0x00;
+ TCCR0B = 0x03;
+ TIMSK0 = (1 << TOIE0);
+
+// ARM
+#elif defined(_mk20dx128_)
+ // 48 MHz clock by default
+
+ // System Clock Gating Register Disable
+ SIM_SCGC6 |= SIM_SCGC6_PIT;
+
+ // Enable Timers
+ PIT_MCR = 0x00;
+
+ // Setup ISR Timer for flagging a kepress send to USB
+ // 1 ms / (1 / 48 MHz) - 1 = 47999 cycles -> 0xBB7F
+ PIT_LDVAL0 = 0x0000BB7F;
+ PIT_TCTRL0 = 0x3; // Enable Timer 0 interrupts, and Enable Timer 0
+
+ // Insert the required vector for Timer 0
+ NVIC_ENABLE_IRQ( IRQ_PIT_CH0 );
+#endif
+}
+
+
+int main(void)
+{
// Configuring Pins
pinSetup();
init_errorLED();
- // Setup USB Module
- usb_setup();
+ // Setup Output Module
+ output_setup();
+
+ // Enable CLI
+ init_cli();
// Setup ISR Timer for flagging a kepress send to USB
- // Set to 256 * 1024 (8 bit timer with Clock/1024 prescalar) timer
- TCCR0A = 0x00;
- TCCR0B = 0x03;
- TIMSK0 = (1 << TOIE0);
+ usbTimerSetup();
// Main Detection Loop
- uint8_t ledTimer = 15; // Enable LED for a short time
+ uint8_t ledTimer = F_CPU / 1000000; // Enable LED for a short time
while ( 1 )
{
// Setup the scanning module
}
}
+
+// ----- Interrupts -----
+
// USB Keyboard Data Send Counter Interrupt
+#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
ISR( TIMER0_OVF_vect )
+#elif defined(_mk20dx128_) // ARM
+void pit0_isr(void)
+#endif
{
sendKeypressCounter++;
if ( sendKeypressCounter > USB_TRANSFER_DIVIDER ) {
sendKeypressCounter = 0;
sendKeypresses = 1;
}
+
+#if defined(_mk20dx128_) // ARM
+ // Clear the interrupt flag
+ PIT_TFLG0 = 1;
+#endif
}