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/*
Copyright 2014 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "action.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "ibm4704.h"
#include "matrix.h"
static void matrix_make(uint8_t code);
static void matrix_break(uint8_t code);
static void matrix_clear(void);
/*
* Matrix Array usage:
* IBM 4704 scan codes are assigned into 128(16x8)-cell matrix.
*
* 8bit wide
* +---------+
* 0| |
* :| XX | 00-7F
* f| |
* +---------+
*
* Exceptions:
*/
static uint8_t matrix[MATRIX_ROWS];
// scan code bits 7654 3210
// R:row/C:column -RRR RCCC
#define ROW(code) ((code>>3)&0x0f)
#define COL(code) (code&0x07)
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
static void enable_break(void)
{
print("Enable break: ");
while (ibm4704_send(0xFC)) { _delay_ms(10); }
// valid scancode: 00-79h
for (uint8_t code = 0; code < 0x7F; code++) {
while (ibm4704_send(0x80|code)) _delay_ms(10);
_delay_ms(5); // wait for response
// No response(FF) when ok, FD when out of bound
xprintf("s%02X:r%02X ", code, ibm4704_recv());
}
while (ibm4704_send(0xFF)) { _delay_ms(10); } // End
print("End\n");
}
void matrix_setup(void)
{
ibm4704_init();
}
void matrix_init(void)
{
debug_enable = true;
print("IBM 4704 converter\n");
matrix_clear();
_delay_ms(2000); // wait for keyboard starting up
xprintf("Keyboard ID: %02X\n", ibm4704_recv());
enable_break();
}
/*
* IBM 4704 Scan Code
*/
uint8_t matrix_scan(void)
{
uint8_t code = ibm4704_recv();
if (code==0xFF) {
// Not receivd
return 0;
} else if ((code&0x7F) >= 0x7A) {
// 0xFF-FA and 0x7F-7A is not scancode
xprintf("Error: %02X\n", code);
matrix_clear();
return 0;
} else if (code&0x80) {
dprintf("%02X\n", code);
matrix_make(code);
} else {
dprintf("%02X\n", code);
matrix_break(code);
}
return 1;
}
inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
return (matrix[row] & (1<<col));
}
inline
uint8_t matrix_get_row(uint8_t row)
{
return matrix[row];
}
void matrix_print(void)
{
print("\nr/c 01234567\n");
for (uint8_t row = 0; row < matrix_rows(); row++) {
xprintf("%02X: %08b\n", row, bitrev(matrix_get_row(row)));
}
}
inline
static void matrix_make(uint8_t code)
{
matrix[ROW(code)] |= 1<<COL(code);
}
inline
static void matrix_break(uint8_t code)
{
matrix[ROW(code)] &= ~(1<<COL(code));
}
inline
static void matrix_clear(void)
{
for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
}
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