Archived
1
0
This repo is archived. You can view files and clone it, but cannot push or open issues or pull requests.
controller/main.c
Jacob Alexander 8ee8e3cb55 Adding analog.c lib from teensyduino.
- Mostly for reference, you shouldn't include it verbatim in your module.
2014-04-12 21:13:37 -07:00

207 lines
4.6 KiB
C

/* Copyright (C) 2011-2014 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.
*/
// ----- Includes -----
// Compiler Includes
#include <Lib/MainLib.h>
// Project Includes
#include <macro.h>
#include <scan_loop.h>
#include <output_com.h>
#include <cli.h>
#include <led.h>
#include <print.h>
// ----- Defines -----
// Verified Keypress Defines
#define USB_TRANSFER_DIVIDER 10 // 1024 == 1 Send of keypresses per second, 1 == 1 Send of keypresses per ~1 millisecond
// ----- Macros -----
#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
#endif
// ----- Function Declarations -----
// ----- Variables -----
// Timer Interrupt for flagging a send of the sampled key detection data to the USB host
uint16_t sendKeypressCounter = 0;
// Flag generated by the timer interrupt
volatile uint8_t sendKeypresses = 0;
// ----- Functions -----
// Initial Pin Setup, make sure they are sane
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;
#endif
DDRB = 0x00;
DDRC = 0x00;
DDRD = 0x00;
DDRE = 0x00;
DDRF = 0x00;
// Setting pins to either high or pull-up resistor
#if defined(__AVR_AT90USB1286__)
PORTA = 0x00;
#endif
PORTB = 0x00;
PORTC = 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
}
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();
// Enable CLI
CLI_init();
// Setup Modules
Output_setup();
Macro_setup();
Scan_setup();
// Setup ISR Timer for flagging a kepress send to USB
usbTimerSetup();
// Main Detection Loop
while ( 1 )
{
// Process CLI
CLI_process();
// Acquire Key Indices
// Loop continuously until scan_loop returns 0
cli();
//while ( scan_loop() );
sei();
// Run Macros over Key Indices and convert to USB Keys
Macro_process();
// Send keypresses over USB if the ISR has signalled that it's time
if ( !sendKeypresses )
continue;
// Send USB Data
Output_send();
// Clear sendKeypresses Flag
sendKeypresses = 0;
}
}
// ----- Interrupts -----
// USB Keyboard Data Send Counter Interrupt
#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
ISR( TIMER0_OVF_vect )
#elif defined(_mk20dx128_) || defined(_mk20dx256_) // 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
}
// ----- CLI Command Functions -----