4 #include "display_basic.h"
6 volatile u8 last_key; /* the last key registered */
9 /* first 8 from the first row, then 3 from the second row */
10 /* keys are 1-9, 0, reset */
11 //const u8 keymap0[8] = {KEY_8, KEY_7, KEY_6, KEY_5, KEY_4, KEY_3, KEY_2, KEY_1};
12 //const u8 keymap1[3] = {KEY_RESET, KEY_0, KEY_9};
13 const u8 keymap0[8] = {KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8};
14 const u8 keymap1[3] = {KEY_9, KEY_0, KEY_RESET};
18 /* reads the keypad and returns the bit number that was turned on in the shift
19 * register (from 0..7). If no bits were turned on, it returns 8 (aka NO_KEY)
21 extern inline u8 keypad_read_row(u8 row) {
25 bset((void*)&_io_ports[M6811_PORTD], PORTD_KEYPAD_ROW);
27 bclr((void*)&_io_ports[M6811_PORTD], PORTD_KEYPAD_ROW);
31 bset_misc_output(A3800_KEYPAD_STROBE);
32 bclr_misc_output(A3800_KEYPAD_STROBE);
34 bclr_misc_output(A3800_DISPLAY_WRITE); /* disable the display clock */
36 _io_ports[M6811_SPDR] = 0x55; /* doesn't matter what we send. */
37 while(!(_io_ports[M6811_SPSR]&M6811_SPIF)); /* wait for completion */
39 /* SPDR read to clear SPIF flag is performed below: */
40 i = _io_ports[M6811_SPDR];
43 while (((i & 0x80) == 0) && (num < 8)) {
53 /* sets last_key to 1..10 or 11 for reset */
55 /* FIXME: need to do debouncing of some sort? */
57 key = keypad_read_row(0);
59 key = keypad_read_row(1);
67 if (key != last_key) {
76 bool keypad_pressed() {
77 if (!new_key) return 0;