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controller/Scan/MBC-55X/scan_loop.c

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/* Copyright (C) 2013,2014 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/ScanLib.h>
// Project Includes
#include <led.h>
#include <print.h>
// Local Includes
#include "scan_loop.h"
// ----- Defines -----
// ----- Macros -----
// ----- Variables -----
// Buffer used to inform the macro processing module which keys have been detected as pressed
volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
volatile uint8_t KeyIndex_BufferUsed;
// ----- Function Declarations -----
void processKeyValue( uint8_t valueType );
void removeKeyValue( uint8_t keyValue );
// ----- Interrupt Functions -----
// UART Receive Buffer Full Interrupt
#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
ISR(USART1_RX_vect)
#elif defined(_mk20dx128_) // ARM
void uart0_status_isr(void)
#endif
{
cli(); // Disable Interrupts
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// Variable for UART data read
uint8_t keyValue = 0x00;
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
keyValue = UDR1;
#elif defined(_mk20dx128_) // ARM
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// UART0_S1 must be read for the interrupt to be cleared
if ( UART0_S1 & UART_S1_RDRF )
{
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// Only doing single byte FIFO here
keyValue = UART0_D;
}
#endif
// Debug
char tmpStr[6];
hexToStr( keyValue, tmpStr );
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dPrintStrs( tmpStr, " " ); // Debug
// Decipher scan value
processKeyValue( keyValue );
sei(); // Re-enable Interrupts
}
// ----- Functions -----
// Setup
inline void Scan_setup()
#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
{
// Setup the the USART interface for keyboard data input
// Setup baud rate - 1205 Baud
// 16 MHz / ( 16 * Baud ) = UBRR
// Baud: 1205 -> 16 MHz / ( 16 * 1205 ) = 829.8755
// Thus baud setting = 830
uint16_t baud = 830; // Max setting of 4095
UBRR1H = (uint8_t)(baud >> 8);
UBRR1L = (uint8_t)baud;
// Enable the receiver, and RX Complete Interrupt
UCSR1B = 0x90;
// Set frame format: 8 data, 1 stop bit, even parity
// Asynchrounous USART mode
UCSR1C = 0x26;
// Reset the keyboard before scanning, we might be in a wierd state
scan_resetKeyboard();
}
#elif defined(_mk20dx128_) // ARM
{
// Setup the the UART interface for keyboard data input
SIM_SCGC4 |= SIM_SCGC4_UART0; // Disable clock gating
// Pin Setup for UART0
PORTB_PCR16 = PORT_PCR_PE | PORT_PCR_PS | PORT_PCR_PFE | PORT_PCR_MUX(3); // RX Pin
PORTB_PCR17 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin
// Setup baud rate - 1205 Baud
// 48 MHz / ( 16 * Baud ) = BDH/L
// Baud: 1205 -> 48 MHz / ( 16 * 1205 ) = 2489.6266
// Thus baud setting = 2490
// NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet
uint16_t baud = 2490; // Max setting of 8191
UART0_BDH = (uint8_t)(baud >> 8);
UART0_BDL = (uint8_t)baud;
// 8 bit, Even Parity, Idle Character bit after stop
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// NOTE: For 8 bit with Parity you must enable 9 bit transmission (pg. 1065)
// You only need to use UART0_D for 8 bit reading/writing though
// UART_C1_M UART_C1_PE UART_C1_PT UART_C1_ILT
UART0_C1 = UART_C1_M | UART_C1_PE | UART_C1_ILT;
// Number of bytes in FIFO before TX Interrupt
UART0_TWFIFO = 1;
// Number of bytes in FIFO before RX Interrupt
UART0_RWFIFO = 1;
// TX FIFO Disabled, TX FIFO Size 1 (Max 8 datawords), RX FIFO Enabled, RX FIFO Size 1 (Max 8 datawords)
// TX/RX FIFO Size:
// 0x0 - 1 dataword
// 0x1 - 4 dataword
// 0x2 - 8 dataword
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//UART0_PFIFO = UART_PFIFO_TXFE | /*TXFIFOSIZE*/ (0x0 << 4) | UART_PFIFO_RXFE | /*RXFIFOSIZE*/ (0x0);
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// Reciever Inversion Disabled, LSBF
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// UART_S2_RXINV UART_S2_MSBF
UART0_S2 |= 0x00;
// Transmit Inversion Disabled
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// UART_C3_TXINV
UART0_C3 |= 0x00;
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// TX Disabled, RX Enabled, RX Interrupt Enabled
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// UART_C2_TE UART_C2_RE UART_C2_RIE
UART0_C2 = UART_C2_RE | UART_C2_RIE;
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// Add interrupt to the vector table
NVIC_ENABLE_IRQ( IRQ_UART0_STATUS );
// Reset the keyboard before scanning, we might be in a wierd state
scan_resetKeyboard();
}
#endif
// Main Detection Loop
inline uint8_t Scan_loop()
{
return 0;
}
void processKeyValue( uint8_t keyValue )
{
// XXX NOTE: The key processing is not complete for this keyboard
// Mostly due to laziness, and that the keyboard can't really be useful on a modern computer
// Basic typing will work, but some of the keys and the Graph mode changes things around
// Add key(s) to processing buffer
// First split out Shift and Ctrl
// Reserved Codes:
// Shift - 0xF5
// Ctrl - 0xF6
switch ( keyValue )
{
// - Ctrl Keys -
// Exception keys
case 0x08: // ^H
case 0x09: // ^I
case 0x0D: // ^M
case 0x1B: // ^[
Macro_bufferAdd( keyValue );
break;
// 0x40 Offset Keys
// Add Ctrl key and offset to the lower alphabet
case 0x00: // ^@
case 0x1C: // "^\"
case 0x1D: // ^]
case 0x1E: // ^^
case 0x1F: // ^_
Macro_bufferAdd( 0xF6 );
Macro_bufferAdd( keyValue + 0x40 );
break;
// - Add Shift key and offset to non-shifted key -
// 0x10 Offset Keys
case 0x21: // !
case 0x23: // #
case 0x24: // $
case 0x25: // %
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x10 );
break;
// 0x11 Offset Keys
case 0x26: // &
case 0x28: // (
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x11 );
break;
// 0x07 Offset Keys
case 0x29: // )
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x07 );
break;
// -0x0E Offset Keys
case 0x40: // @
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue - 0x0E );
break;
// 0x0E Offset Keys
case 0x2A: // *
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x0E );
break;
// 0x12 Offset Keys
case 0x2B: // +
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x12 );
break;
// 0x05 Offset Keys
case 0x22: // "
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x05 );
break;
// 0x01 Offset Keys
case 0x3A: // :
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x01 );
break;
// -0x10 Offset Keys
case 0x3C: // <
case 0x3E: // >
case 0x3F: // ?
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue - 0x10 );
break;
// -0x28 Offset Keys
case 0x5E: // ^
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue - 0x28 );
break;
// -0x32 Offset Keys
case 0x5F: // _
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue - 0x32 );
break;
// -0x20 Offset Keys
case 0x7B: // {
case 0x7C: // |
case 0x7D: // }
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue - 0x20 );
break;
// -0x1E Offset Keys
case 0x7E: // ~
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue - 0x1E );
break;
// All other keys
default:
// Ctrl Characters are from 0x00 to 0x1F, excluding:
// 0x08 - Backspace
// 0x09 - [Horizontal] Tab
// 0x0D - [Carriage] Return
// 0x1B - Escape
// 0x7F - Delete (^?) (Doesn't need to be split out)
// 0x60 Offset Keys
// Add Ctrl key and offset to the lower alphabet
if ( keyValue >= 0x00 && keyValue <= 0x1F )
{
Macro_bufferAdd( 0xF6 );
Macro_bufferAdd( keyValue + 0x60 );
}
// Shift Characters are from 0x41 to 0x59
// No exceptions here :D
// Add Shift key and offset to the lower alphabet
else if ( keyValue >= 0x41 && keyValue <= 0x5A )
{
Macro_bufferAdd( 0xF5 );
Macro_bufferAdd( keyValue + 0x20 );
}
// Everything else
else
{
Macro_bufferAdd( keyValue );
}
break;
}
}
// Send data
// NOTE: Example only, MBC-55X cannot receive user data
uint8_t Scan_sendData( uint8_t dataPayload )
{
// Debug
char tmpStr[6];
hexToStr( dataPayload, tmpStr );
info_dPrint( "Sending - ", tmpStr );
#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
UDR1 = dataPayload;
#elif defined(_mk20dx128_) // ARM
UART0_D = dataPayload;
#endif
return 0;
}
// Signal KeyIndex_Buffer that it has been properly read
void Scan_finishedWithBuffer( uint8_t sentKeys )
{
}
// Signal that the keys have been properly sent over USB
void Scan_finishedWithUSBBuffer( uint8_t sentKeys )
{
cli(); // Disable Interrupts
// Reset the buffer counter
KeyIndex_BufferUsed = 0;
sei(); // Re-enable Interrupts
}
// Reset/Hold keyboard
// NOTE: Does nothing with the MBC-55x
void Scan_lockKeyboard( void )
{
}
// NOTE: Does nothing with the MBC-55x
void Scan_unlockKeyboard( void )
{
}
// Reset Keyboard
void Scan_resetKeyboard( void )
{
// Not a calculated valued...
_delay_ms( 50 );
KeyIndex_BufferUsed = 0;
}