f9e1600b28
- Lots of code cleanup for the intialization of all arm chips - Added more gcc flags to help with debugging linker and memory map - Fixed UART initialization for the smaller MCHCK mk20dx128 (different pin mux)
206 рядки
4.8 KiB
C
206 рядки
4.8 KiB
C
/* Copyright (C) 2011-2014 by Jacob Alexander
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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// ----- Includes -----
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// Compiler Includes
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#include <Lib/MainLib.h>
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// Project Includes
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#include <macro.h>
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#include <scan_loop.h>
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#include <output_com.h>
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#include <cli.h>
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#include <led.h>
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#include <print.h>
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// ----- Defines -----
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// Verified Keypress Defines
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#define USB_TRANSFER_DIVIDER 10 // 1024 == 1 Send of keypresses per second, 1 == 1 Send of keypresses per ~1 millisecond
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// ----- Macros -----
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
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#endif
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// ----- Function Declarations -----
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// ----- Variables -----
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// Timer Interrupt for flagging a send of the sampled key detection data to the USB host
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uint16_t sendKeypressCounter = 0;
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// Flag generated by the timer interrupt
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volatile uint8_t sendKeypresses = 0;
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// ----- Functions -----
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// Initial Pin Setup, make sure they are sane
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inline void pinSetup()
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{
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// AVR
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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// For each pin, 0=input, 1=output
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#if defined(__AVR_AT90USB1286__)
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DDRA = 0x00;
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#endif
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DDRB = 0x00;
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DDRC = 0x00;
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DDRD = 0x00;
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DDRE = 0x00;
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DDRF = 0x00;
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// Setting pins to either high or pull-up resistor
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#if defined(__AVR_AT90USB1286__)
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PORTA = 0x00;
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#endif
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PORTB = 0x00;
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PORTC = 0x00;
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PORTD = 0x00;
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PORTE = 0x00;
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PORTF = 0x00;
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// ARM
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#elif defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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// TODO - Should be cleared, but not that necessary due to the pin layout
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#endif
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}
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inline void usbTimerSetup()
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{
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// AVR
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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// Setup with 16 MHz clock
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CPU_PRESCALE( 0 );
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// Setup ISR Timer for flagging a kepress send to USB
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// Set to 256 * 1024 (8 bit timer with Clock/1024 prescalar) timer
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TCCR0A = 0x00;
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TCCR0B = 0x03;
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TIMSK0 = (1 << TOIE0);
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// ARM
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#elif defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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// 48 MHz clock by default
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// System Clock Gating Register Disable
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SIM_SCGC6 |= SIM_SCGC6_PIT;
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// Enable Timers
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PIT_MCR = 0x00;
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// Setup ISR Timer for flagging a kepress send to USB
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// 1 ms / (1 / 48 MHz) - 1 = 47999 cycles -> 0xBB7F
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PIT_LDVAL0 = 0x0000BB7F;
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PIT_TCTRL0 = 0x3; // Enable Timer 0 interrupts, and Enable Timer 0
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// Insert the required vector for Timer 0
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NVIC_ENABLE_IRQ( IRQ_PIT_CH0 );
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#endif
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}
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int main()
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{
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// Configuring Pins
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pinSetup();
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// Enable CLI
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CLI_init();
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// Setup Modules
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Output_setup();
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Macro_setup();
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Scan_setup();
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// Setup ISR Timer for flagging a kepress send to USB
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usbTimerSetup();
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// Main Detection Loop
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while ( 1 )
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{
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// Process CLI
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CLI_process();
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// Acquire Key Indices
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// Loop continuously until scan_loop returns 0
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cli();
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while ( Scan_loop() );
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sei();
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// Run Macros over Key Indices and convert to USB Keys
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Macro_process();
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// Send keypresses over USB if the ISR has signalled that it's time
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if ( !sendKeypresses )
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continue;
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// Send USB Data
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Output_send();
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// Clear sendKeypresses Flag
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sendKeypresses = 0;
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}
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}
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// ----- Interrupts -----
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// USB Keyboard Data Send Counter Interrupt
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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ISR( TIMER0_OVF_vect )
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#elif defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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void pit0_isr()
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#endif
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{
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sendKeypressCounter++;
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if ( sendKeypressCounter > USB_TRANSFER_DIVIDER ) {
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sendKeypressCounter = 0;
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sendKeypresses = 1;
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}
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#if defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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// Clear the interrupt flag
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PIT_TFLG0 = 1;
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#endif
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}
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// ----- CLI Command Functions -----
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