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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)
{
uint8_t ret;
for (uint8_t code = 0; code < 0x80; code++) {
while (ibm4704_send(0x80|code) != 0) {
print("z");
}
_delay_ms(1);
ret = ibm4704_recv();
if (ret!=0xFF) {
xprintf("%0X: %0X ", code, ret);
}
}
_delay_us(100);
print("End\n");
while (ibm4704_send(0xFF) != 0) {
print("Z");
} // End
}
void matrix_init(void)
{
debug_enable = true;
ibm4704_init();
matrix_clear();
xprintf("------\n");
enable_break();
//while (ibm4704_send(0x8C) != 0) ;
//while (ibm4704_send(0xFF) != 0) ;
}
/*
* IBM 4704 Scan Code
*/
uint8_t matrix_scan(void)
{
uint8_t code = ibm4704_recv();
if (code==0xFF) {
// Not receivd
return 0;
} else if ((code&0x78)==0x78) {
// 0xFF-F8 and 0x7F-78 is not scan code
dprintf("Error: %0X\n", code);
matrix_clear();
return 0;
} else if (code&0x80) {
matrix_make(code);
} else {
matrix_break(code);
}
return 1;
}
inline
bool matrix_has_ghost(void)
{
return false;
}
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++) {
// TODO: use new function
phex(row); print(": ");
pbin_reverse(matrix_get_row(row));
print("\n");
}
}
uint8_t matrix_key_count(void)
{
uint8_t count = 0;
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
count += bitpop(matrix[i]);
}
return count;
}
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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