matrix scan & default keymap

This commit is contained in:
tmk 2010-08-22 23:58:37 +09:00
parent 20711b59e7
commit 8cfb3712d5
7 changed files with 467 additions and 38 deletions

186
mykey.c
View file

@ -27,6 +27,7 @@
#include <util/delay.h>
#include "usb_keyboard_debug.h"
#include "print.h"
#include "keymap.h"
#define LED_CONFIG (DDRD |= (1<<6))
#define LED_ON (PORTD &= ~(1<<6))
@ -38,21 +39,127 @@ uint8_t number_keys[10]=
uint16_t idle_count=0;
//
// scan matrix
//
uint8_t MAX_ROW = 9;
// initialize ports for matrix
void port_setup(void)
{
// Column: input w/pullup
DDRB = 0x00;
PORTB = 0xFF;
// Row: Hi-Z(unselected)
// PD:0,1,2,3,6,7
// PC:6,7
// PF:7
DDRD = 0x00;
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
}
// select a row of matrix for read
void select_row(uint8_t row)
{
switch (row) {
case 0:
DDRD = (1<<0);
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 1:
DDRD = (1<<1);
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 2:
DDRD = (1<<2);
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 3:
DDRD = (1<<3);
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 4:
DDRD = (1<<6);
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 5:
DDRD = (1<<7);
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 6:
DDRD = 0x00;
PORTD = 0x00;
DDRC = (1<<6);
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 7:
DDRD = 0x00;
PORTD = 0x00;
DDRC = (1<<7);
PORTC = 0x00;
DDRF = 0x00;
PORTF = 0x00;
break;
case 8:
DDRD = 0x00;
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0x00;
DDRF = (1<<7);
PORTF = 0x00;
break;
}
}
uint8_t read_col(void)
{
return PINB;
}
int main(void)
{
uint8_t b, d, mask, i, reset_idle;
uint8_t b_prev=0xFF, d_prev=0xFF;
uint8_t i, reset_idle;
uint8_t prev_state[MAX_ROW];
for (int i=0; i < MAX_ROW; i++) prev_state[i] = 0xFF;
// set for 16 MHz clock
CPU_PRESCALE(0);
// Configure all port B and port D pins as inputs with pullup resistors.
// See the "Using I/O Pins" page for details.
// http://www.pjrc.com/teensy/pins.html
DDRD = 0x00;
DDRB = 0x00;
PORTB = 0xFF;
PORTD = 0xFF;
port_setup();
// Initialize the USB, and then wait for the host to set configuration.
// If the Teensy is powered without a PC connected to the USB port,
@ -76,32 +183,40 @@ int main(void)
print("All Port B or Port D pins are inputs with pullup resistors.\n");
print("Any connection to ground on Port B or D pins will result in\n");
print("keystrokes sent to the PC (and debug messages here).\n");
uint8_t col;
uint8_t code;
while (1) {
// read all port B and port D pins
b = PINB;
d = PIND;
// check if any pins are low, but were high previously
mask = 1;
reset_idle = 0;
for (i=0; i<8; i++) {
if (((b & mask) == 0) && (b_prev & mask) != 0) {
//usb_keyboard_press(KEY_B, KEY_SHIFT);
//usb_keyboard_press(number_keys[i], 0);
print("Port B, bit ");
phex(i);
print("\n");
reset_idle = 1;
}
if (((d & mask) == 0) && (d_prev & mask) != 0) {
//usb_keyboard_press(KEY_D, KEY_SHIFT);
//usb_keyboard_press(number_keys[i], 0);
print("Port D, bit ");
phex(i);
print("\n");
reset_idle = 1;
}
mask = mask << 1;
}
reset_idle = 0;
for (uint8_t r=0; r < MAX_ROW; r++) {
select_row(r);
// without this read unstable value.
_delay_us(30);
col = read_col();
if (col != prev_state[r]) {
prev_state[r] = col;
phex(r);
print(": ");
pbin(col);
print("\n");
for (int c = 0; c < 8; c++) {
if (col & 1<<c) continue;
code = get_keycode(r, c);
phex(code);
print("\n");
usb_keyboard_press(code, 0);
}
reset_idle = 1;
}
}
// if any keypresses were detected, reset the idle counter
if (reset_idle) {
// variables shared with interrupt routines must be
@ -111,11 +226,10 @@ int main(void)
idle_count = 0;
sei();
}
// now the current pins will be the previous, and
// wait a short delay so we're not highly sensitive
// to mechanical "bounce".
b_prev = b;
d_prev = d;
_delay_ms(2);
}
}