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@@ -27,91 +27,10 @@ static uint8_t debouncing = DEBOUNCE; |
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static matrix_row_t matrix[MATRIX_ROWS]; |
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static matrix_row_t matrix_debouncing[MATRIX_ROWS]; |
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#define _DDRA (uint8_t *const)&DDRA |
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#define _DDRB (uint8_t *const)&DDRB |
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#define _DDRC (uint8_t *const)&DDRC |
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#define _DDRD (uint8_t *const)&DDRD |
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#define _DDRE (uint8_t *const)&DDRE |
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#define _DDRF (uint8_t *const)&DDRF |
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#define _PINA (uint8_t *const)&PINA |
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#define _PINB (uint8_t *const)&PINB |
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#define _PINC (uint8_t *const)&PINC |
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#define _PIND (uint8_t *const)&PIND |
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#define _PINE (uint8_t *const)&PINE |
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#define _PINF (uint8_t *const)&PINF |
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#define _PORTA (uint8_t *const)&PORTA |
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#define _PORTB (uint8_t *const)&PORTB |
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#define _PORTC (uint8_t *const)&PORTC |
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#define _PORTD (uint8_t *const)&PORTD |
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#define _PORTE (uint8_t *const)&PORTE |
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#define _PORTF (uint8_t *const)&PORTF |
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#define _BIT0 0x01 |
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#define _BIT1 0x02 |
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#define _BIT2 0x04 |
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#define _BIT3 0x08 |
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#define _BIT4 0x10 |
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#define _BIT5 0x20 |
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#define _BIT6 0x40 |
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#define _BIT7 0x80 |
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/* Specifies the ports and pin numbers for the rows */ |
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static |
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uint8_t *const row_ddr[MATRIX_ROWS] = {_DDRB, _DDRB, _DDRB, _DDRB, _DDRB, _DDRB}; |
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static |
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uint8_t *const row_port[MATRIX_ROWS] = {_PORTB, _PORTB, _PORTB, _PORTB, _PORTB, _PORTB}; |
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static |
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uint8_t *const row_pin[MATRIX_ROWS] = {_PINB, _PINB, _PINB, _PINB, _PINB, _PINB}; |
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static |
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const uint8_t row_bit[MATRIX_ROWS] = { _BIT0, _BIT1, _BIT2, _BIT3, _BIT4, _BIT5}; |
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/* Specifies the ports and pin numbers for the columns */ |
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static |
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uint8_t *const col_ddr[MATRIX_COLS] = { _DDRD, _DDRC, _DDRC, _DDRD, _DDRD, _DDRE, |
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_DDRF, _DDRF, _DDRF, _DDRF, _DDRF, _DDRF, |
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_DDRD, _DDRD, _DDRD, _DDRD, _DDRD}; |
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static |
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uint8_t *const col_port[MATRIX_COLS] = {_PORTD, _PORTC, _PORTC, _PORTD, _PORTD, _PORTE, |
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_PORTF, _PORTF, _PORTF, _PORTF, _PORTF, _PORTF, |
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_PORTD, _PORTD, _PORTD, _PORTD, _PORTD}; |
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static |
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const uint8_t col_bit[MATRIX_COLS] = { _BIT5, _BIT7, _BIT6, _BIT4, _BIT0, _BIT6, |
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_BIT0, _BIT1, _BIT4, _BIT5, _BIT6, _BIT7, |
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_BIT7, _BIT6, _BIT1, _BIT2, _BIT3}; |
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static |
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inline void pull_column(int col) { |
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*col_port[col] &= ~col_bit[col]; |
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} |
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static |
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inline void release_column(int col) { |
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*col_port[col] |= col_bit[col]; |
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} |
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/* PORTB is set as input with pull-up resistors |
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PORTC,D,E,F are set to high output */ |
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static |
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void setup_io_pins(void) { |
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uint8_t row, col; |
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for(row = 0; row < MATRIX_ROWS; row++) { |
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*row_ddr[row] &= ~row_bit[row]; |
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*row_port[row] |= row_bit[row]; |
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} |
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for(col = 0; col < MATRIX_COLS; col++) { |
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*col_ddr[col] |= col_bit[col]; |
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*col_port[col] |= col_bit[col]; |
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} |
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} |
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static uint8_t read_rows(void); |
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static void init_rows(void); |
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static void unselect_cols(void); |
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static void select_col(uint8_t col); |
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/* LEDs are on output compare pins OC1B OC1C |
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This activates fast PWM mode on them. |
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@@ -158,7 +77,8 @@ void matrix_init(void) |
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MCUCR |= (1<<JTD); |
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// initialize row and col |
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setup_io_pins(); |
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unselect_cols(); |
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init_rows(); |
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setup_leds(); |
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// initialize matrix state: all keys off |
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@@ -171,11 +91,12 @@ void matrix_init(void) |
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uint8_t matrix_scan(void) |
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{ |
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for (uint8_t col = 0; col < MATRIX_COLS; col++) { // 0-16 |
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pull_column(col); // output hi on theline |
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select_col(col); |
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_delay_us(3); // without this wait it won't read stable value. |
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uint8_t rows = read_rows(); |
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) { // 0-5 |
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bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col); |
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bool curr_bit = !(*row_pin[row] & row_bit[row]); |
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bool curr_bit = rows & (1<<row); |
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if (prev_bit != curr_bit) { |
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matrix_debouncing[row] ^= ((matrix_row_t)1<<col); |
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if (debouncing) { |
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@@ -184,7 +105,7 @@ uint8_t matrix_scan(void) |
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debouncing = DEBOUNCE; |
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} |
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} |
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release_column(col); |
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unselect_cols(); |
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} |
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if (debouncing) { |
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@@ -202,7 +123,7 @@ uint8_t matrix_scan(void) |
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bool matrix_is_modified(void) |
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{ |
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// NOTE: no longer used |
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if (debouncing) return false; |
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return true; |
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} |
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@@ -232,10 +153,120 @@ uint8_t matrix_key_count(void) |
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{ |
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uint8_t count = 0; |
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) { |
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for (uint8_t j = 0; j < MATRIX_COLS; j++) { |
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if (matrix_is_on(i, j)) |
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count++; |
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} |
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count += bitpop32(matrix[i]); |
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} |
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return count; |
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} |
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/* Row pin configuration |
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* row: 0 1 2 3 4 5 |
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* pin: B0 B1 B2 B3 B4 B5 |
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*/ |
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static void init_rows(void) |
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{ |
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// Input with pull-up(DDR:0, PORT:1) |
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DDRB &= ~0b00111111; |
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PORTB |= 0b00111111; |
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} |
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static uint8_t read_rows(void) |
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{ |
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return (PINB&(1<<0) ? 0 : (1<<0)) | |
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(PINB&(1<<1) ? 0 : (1<<1)) | |
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(PINB&(1<<2) ? 0 : (1<<2)) | |
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(PINB&(1<<3) ? 0 : (1<<3)) | |
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(PINB&(1<<4) ? 0 : (1<<4)) | |
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(PINB&(1<<5) ? 0 : (1<<5)); |
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} |
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/* Column pin configuration |
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* col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
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* pin: D5 C7 C6 D4 D0 E6 F0 F1 F4 F5 F6 F7 D7 D6 D1 D2 D3 |
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*/ |
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static void unselect_cols(void) |
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{ |
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// Hi-Z(DDR:0, PORT:0) to unselect |
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DDRC |= 0b11000000; // PC: 7 6 |
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PORTC |= 0b11000000; |
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DDRD |= 0b11111111; // PD: 7 6 5 4 3 2 1 0 |
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PORTD |= 0b11111111; |
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DDRE |= 0b01000000; // PE: 6 |
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PORTE |= 0b01000000; |
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DDRF |= 0b11110011; // PF: 7 6 5 4 1 0 |
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PORTF |= 0b11110011; |
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} |
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static void select_col(uint8_t col) |
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{ |
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// Output low(DDR:1, PORT:0) to select |
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switch (col) { |
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case 0: |
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DDRD |= (1<<5); |
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PORTD &= ~(1<<5); |
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break; |
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case 1: |
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DDRC |= (1<<7); |
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PORTC &= ~(1<<7); |
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break; |
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case 2: |
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DDRC |= (1<<6); |
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PORTC &= ~(1<<6); |
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break; |
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case 3: |
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DDRD |= (1<<4); |
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PORTD &= ~(1<<4); |
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break; |
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case 4: |
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DDRD |= (1<<0); |
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PORTD &= ~(1<<0); |
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break; |
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case 5: |
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DDRE |= (1<<6); |
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PORTE &= ~(1<<6); |
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break; |
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case 6: |
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DDRF |= (1<<0); |
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PORTF &= ~(1<<0); |
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break; |
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case 7: |
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DDRF |= (1<<1); |
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PORTF &= ~(1<<1); |
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break; |
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case 8: |
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DDRF |= (1<<4); |
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PORTF &= ~(1<<4); |
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break; |
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case 9: |
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DDRF |= (1<<5); |
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PORTF &= ~(1<<5); |
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break; |
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case 10: |
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DDRF |= (1<<6); |
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PORTF &= ~(1<<6); |
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break; |
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case 11: |
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DDRF |= (1<<7); |
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PORTF &= ~(1<<7); |
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break; |
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case 12: |
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DDRD |= (1<<7); |
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PORTD &= ~(1<<7); |
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break; |
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case 13: |
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DDRD |= (1<<6); |
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PORTD &= ~(1<<6); |
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break; |
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case 14: |
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DDRD |= (1<<1); |
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PORTD &= ~(1<<1); |
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break; |
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case 15: |
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DDRD |= (1<<2); |
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PORTD &= ~(1<<2); |
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break; |
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case 16: |
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DDRD |= (1<<3); |
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PORTD &= ~(1<<3); |
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break; |
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} |
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} |