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controller/main.c
Jacob Alexander 1e03ed42aa Code re-factor now compiles.
- Added better string handling and canned messages
- Added LED error function
- Moved code around
- Prepared the matrix code for multiple styles of scanning (changed at compile time)
2011-09-27 21:31:59 -07:00

129 lines
3.3 KiB
C

/* Copyright (C) 2011 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
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <util/delay.h>
//#include "usb_keys.h"
#include "scan_loop.h"
//#include "layouts.h"
//#include "usb_keyboard.h"
// TEMP INCLUDES
#include "usb_keyboard_debug.h"
#include <print.h>
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
// Verified Keypress Defines
#define USB_TRANSFER_DIVIDER 10 // 1024 == 1 Send of keypresses per second, 1 == 1 Send of keypresses per ~1 millisecond
// Error LED Control
void errorLED( uint8_t on )
{
// Error LED On
if ( on ) {
PORTD |= (1<<6);
}
// Error LED Off
else {
PORTD &= ~(1<<6);
}
}
// Initial Pin Setup
// If the matrix is properly set, this function does not need to be changed
inline void pinSetup(void)
{
// For each pin, 0=input, 1=output
DDRA = 0x00;
DDRB = 0x00;
DDRC = 0x00;
DDRD = 0x40; // LED Setup
DDRE = 0x00;
DDRF = 0x00;
// Setting pins to either high or pull-up resistor
PORTA = 0x00;
PORTB = 0x00;
PORTC = 0x00;
PORTD = 0x40; // LED Enable
PORTE = 0x00;
PORTF = 0x00;
}
int main( void )
{
// Setup with 16 MHz clock
CPU_PRESCALE( 0 );
// Configuring Pins
pinSetup();
// Initialize the USB, and then wait for the host to set configuration.
// If the Teensy is powered without a PC connected to the USB port,
// this will wait forever.
usb_init();
while ( !usb_configured() ) /* wait */ ;
// Wait an extra second for the PC's operating system to load drivers
// and do whatever it does to actually be ready for input
_delay_ms(1000);
// 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);
uint16_t led = 0;
// Main Detection Loop
while ( 1 ) {
//scan_loop();
// Loop should never get here (indicate error)
errorLED( 1 );
// HID Debug Error message
erro_print("Detection loop error, this is very bad...bug report!");
}
}
// Timer Interrupt for flagging a send of the sampled key detection data to the USB host
uint16_t sendKeypressCounter = 0;
ISR( TIMER0_OVF_vect )
{
sendKeypressCounter++;
if ( sendKeypressCounter > USB_TRANSFER_DIVIDER ) {
sendKeypressCounter = 0;
sendKeypresses = 1;
}
}