5 u8 last_key; /* the last key registered */
8 /* first 8 from the first row, then 3 from the second row */
9 /* keys are 1-9, 0, reset */
10 const u8 keymap0[8] = {8, 7, 6, 5, 4, 3, 2, 1};
11 const u8 keymap1[3] = {11, 10, 9};
13 extern inline int keypad_read_row(int row) {
16 _io_ports[M6811_PORTD] |= PORTD_KEYPAD_ROW;
18 _io_ports[M6811_PORTD] &= ~PORTD_KEYPAD_ROW;
20 bclr_misc_output(A3800_DISPLAY_WRITE); /* disable the display clock */
22 _io_ports[M6811_SPDR] = 0;
23 while(!(_io_ports[M6811_SPDR]&M6811_SPIE)); /* wait for completion */
25 for (i = _io_ports[M6811_SPDR], num = 0;
32 /* returns a key 1..10 or 11 for reset */
34 /* FIXME: need to do debouncing of some sort? */
36 key = keypad_read_row(0);
38 key = keypad_read_row(1);
43 if (key != last_key) {
52 bool keypad_pressed() {
53 if (!new_key) return 0;