diff options
Diffstat (limited to 'mykey.c')
| -rw-r--r-- | mykey.c | 186 |
1 files changed, 150 insertions, 36 deletions
@@ -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); } } |