True AL1 Support (#3330)

* Initial port of AL1 Keyboard from Triangle Labs

* Change REPLACE WITH YOUR NAME and some readme changes

* More readme change to indicate Group Buy Link

* Give Triangle Lab credit

* remove pins from config.h and rely on matrix.c

* Add QMK Configurator support

keyboards/al1/matrix.c

@@ -0,0 +1,184 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+
+#ifndef DEBOUNCING_DELAY
+#   define DEBOUNCING_DELAY 5
+#endif
+static uint8_t debouncing = DEBOUNCING_DELAY;
+
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static uint8_t read_rows(void);
+static void init_rows(void);
+static void unselect_cols(void);
+static void select_col(uint8_t col);
+
+inline uint8_t matrix_rows(void) {
+  return MATRIX_ROWS;
+}
+
+inline uint8_t matrix_cols(void) {
+  return MATRIX_COLS;
+}
+
+
+void matrix_init(void) {
+  // initialize row and col
+    unselect_cols();
+    init_rows();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+  matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+  for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+    select_col(col);
+    _delay_us(3);
+    uint8_t rows = read_rows();
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+      bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
+      bool curr_bit = rows & (1<<row);
+      if (prev_bit != curr_bit) {
+        matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
+        debouncing = DEBOUNCING_DELAY;
+      }
+    }
+    unselect_cols();
+  }
+
+  if (debouncing) {
+    if (--debouncing) {
+      _delay_ms(1);
+    } else {
+      for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        matrix[i] = matrix_debouncing[i];
+      }
+    }
+  }
+
+  matrix_scan_quantum();
+  return 1;
+}
+
+bool matrix_is_modified(void) {
+  if (debouncing)
+    return false;
+  else
+    return true;
+}
+
+inline bool matrix_is_on(uint8_t row, uint8_t col) {
+  return (matrix[row] & ((matrix_row_t)1<<col));
+}
+
+inline matrix_row_t matrix_get_row(uint8_t row) {
+  return matrix[row];
+}
+
+void matrix_print(void) {
+  print("\nr/c 0123456789ABCDEF\n");
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
+  }
+}
+
+uint8_t matrix_key_count(void) {
+  uint8_t count = 0;
+  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    count += bitpop32(matrix[i]);
+  }
+  return count;
+}
+
+/* Row pin configuration
+ *
+ * row: 0    1    2    3    4    5 
+ * pin: C7   B1   B2   C6   B4   B5
+ *
+ */
+static void init_rows(void)
+{
+  DDRC &= ~0b11000000;
+  DDRB &= ~0b00110110;
+  PORTC |= 0b11000000;
+  PORTB |= 0b00110110;
+}
+
+static uint8_t read_rows(void) {
+  return (PINC&(1<<PC7) ? 0 : (1<<0)) |
+    (PINB&(1<<PB1) ? 0 : (1<<1)) |
+    (PINB&(1<<PB2) ? 0 : (1<<2)) |
+    (PINC&(1<<PC6) ? 0 : (1<<3)) |
+    (PINB&(1<<PB4) ? 0 : (1<<4)) |
+    (PINB&(1<<PB5) ? 0 : (1<<5));
+}
+
+/* Row pin configuration
+ * pin:     D3  D7  D6  D5  D4
+ * row: off  0   x   x   x   x
+ *      0    1   0   0   0   0
+ *      1    1   0   0   0   1
+ *      2    1   0   0   1   0
+ *      3    1   0   0   1   1
+ *      4    1   0   1   0   0
+ *      5    1   0   1   0   1
+ *      6    1   0   1   1   0
+ *      7    1   0   1   1   1
+ *      8    1   1   0   0   0
+ *      9    1   1   0   0   1
+ *      10   1   1   0   1   0
+ *      11   1   1   0   1   1
+ *      12   1   1   1   0   0
+ *      13   1   1   1   0   1
+ *      14   1   1   1   1   0
+ *      15   1   1   1   1   1
+ */
+static void  unselect_cols(void)
+{
+  // output high(DDR:1, PORT:1) to unselect
+  DDRB  |= (1 << PD3);
+  PORTB |= (1 << PD3);
+}
+
+static void select_col(uint8_t col) {
+  DDRD  |= (1<<PD3 | 1<<PD4 | 1<<PD5 | 1<<PD6 | 1<<PD7);
+
+  PORTD &= ~(1<<PD3);
+
+  if (col & (1<<0)) {
+    PORTD |= (1<<PD4);
+  }
+  else {
+    PORTD &= ~(1<<PD4);
+  }
+  if (col & (1<<1)) {
+    PORTD |= (1<<PD5);
+  }
+  else {
+    PORTD &= ~(1<<PD5);
+  }
+  if (col & (1<<2)) {
+    PORTD |= (1<<PD6);
+  }
+  else {
+    PORTD &= ~(1<<PD6);
+  }
+  if (col & (1<<3)) {
+    PORTD |= (1<<PD7);
+  }
+  else {
+    PORTD &= ~(1<<PD7);
+  }
+}