3 u8 last_key; /* the last key registered */
4 u8 curr_key; /* the key currently being held down */
6 /* first 8 from the first row, then 3 from the second row */
7 /* keys are 1-9, 0, reset */
8 const u8 keymap0[8] = {8, 7, 6, 5, 4, 3, 2, 1};
9 const u8 keymap1[3] = {11, 10, 9};
11 extern inline int keypad_read_row(int row) {
14 _io_ports[M6811_PORTD] |= PORTD_KEYPAD_ROW;
16 _io_ports[M6811_PORTD] &= ~PORTD_KEYPAD_ROW;
18 bclr_misc_output(A3800_DISPLAY_WRITE); /* disable the display clock */
20 _io_ports[M6811_SPDR] = 0;
21 while(!(_io_ports[M6811_SPDR]&M6811_SPIE)); /* wait for completion */
23 for (i = _io_ports[M6811_SPDR], num = 0;
30 /* returns a key 0..9 or 11 for reset */
32 /* FIXME: need to do debouncing of some sort? */
34 key = keypad_read_row(0);
36 key = keypad_read_row(1);
37 curr_key = keymap0[key];
39 curr_key = keymap1[key];
41 if (curr_key != last_key) {