summaryrefslogtreecommitdiff
path: root/converter/ibm4704_usb/matrix.c
diff options
context:
space:
mode:
Diffstat (limited to 'converter/ibm4704_usb/matrix.c')
-rw-r--r--converter/ibm4704_usb/matrix.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/converter/ibm4704_usb/matrix.c b/converter/ibm4704_usb/matrix.c
new file mode 100644
index 0000000000..0bfda2b158
--- /dev/null
+++ b/converter/ibm4704_usb/matrix.c
@@ -0,0 +1,170 @@
+/*
+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;
+ print("Enable break: ");
+ // valid scancode: 00-77h
+ for (uint8_t code = 0; code < 0x78; code++) {
+ while (ibm4704_send(0x80|code) != 0) {
+ print("z");
+ _delay_us(500);
+ }
+ _delay_us(2000);
+ ret = ibm4704_recv();
+ if (ret != 0xff) {
+ xprintf("c%02X:r%02X ", code, ret);
+ }
+ _delay_us(1000);
+ }
+ _delay_us(1000);
+ while (ibm4704_send(0xFF) != 0) { _delay_us(500); } // End
+ print("End\n");
+}
+
+void matrix_init(void)
+{
+ uint8_t ret;
+ debug_enable = true;
+
+ ibm4704_init();
+ matrix_clear();
+
+ // read keyboard id
+ while ((ret = ibm4704_recv()) == 0xFF) {
+ ibm4704_send(0xFE);
+ _delay_us(100);
+ }
+
+ _delay_ms(2000); // wait for starting up debug console
+ print("IBM 4704 converter\n");
+ xprintf("Keyboard ID: %02X\n", ret);
+ 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&0x78)==0x78) {
+ // 0xFF-F8 and 0x7F-78 is not scancode
+ xprintf("Error: %0X\n", code);
+ matrix_clear();
+ return 0;
+ } else if (code&0x80) {
+ matrix_make(code);
+ } else {
+ 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;
+}