dd Honeycomb macropad (#5000)

* Add Honeycome macropad

* Replace pragma, update info

* Update code based on review

keyboards/honeycomb/matrix.c

@@ -0,0 +1,202 @@
+/*
+Copyright 2012 Jun Wako
+Copyright 2014 Jack Humbert
+Copyright 2019 @filoxo
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <stdint.h>
+#include <stdbool.h>
+#if defined(__AVR__)
+#include <avr/io.h>
+#endif
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "timer.h"
+#include "honeycomb.h"
+#include "pointing_device.h"
+#include "report.h"
+
+#if (MATRIX_COLS <= 8)
+# define print_matrix_header()  print("\nr/c 01234567\n")
+# define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
+# define matrix_bitpop(i)       bitpop(matrix[i])
+# define ROW_SHIFTER ((uint8_t)1)
+#elif (MATRIX_COLS <= 16)
+# define print_matrix_header()  print("\nr/c 0123456789ABCDEF\n")
+# define print_matrix_row(row)  print_bin_reverse16(matrix_get_row(row))
+# define matrix_bitpop(i)       bitpop16(matrix[i])
+# define ROW_SHIFTER ((uint16_t)1)
+#elif (MATRIX_COLS <= 32)
+# define print_matrix_header()  print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+# define print_matrix_row(row)  print_bin_reverse32(matrix_get_row(row))
+# define matrix_bitpop(i)       bitpop32(matrix[i])
+# define ROW_SHIFTER  ((uint32_t)1)
+#endif
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+//extern int8_t encoderValue;
+int8_t encoderValue = 0;
+
+__attribute__ ((weak))
+void matrix_init_quantum(void) {
+    matrix_init_kb();
+}
+
+__attribute__ ((weak))
+void matrix_scan_quantum(void) {
+    matrix_scan_kb();
+}
+
+__attribute__ ((weak))
+void matrix_init_kb(void) {
+    matrix_init_user();
+}
+
+__attribute__ ((weak))
+void matrix_scan_kb(void) {
+    matrix_scan_user();
+}
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+}
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {
+}
+
+inline
+uint8_t matrix_rows(void) {
+    return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void) {
+    return MATRIX_COLS;
+}
+
+void matrix_init(void) {
+
+    matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void)
+{
+    SERIAL_UART_INIT();
+
+    uint32_t timeout = 0;
+
+    // The 's' character requests the RF slave to send the matrix
+    SERIAL_UART_DATA = 's';
+
+    // Trust the external keystates entirely, erase the last data
+    uint8_t uart_data[4] = {0};
+
+    // There are 3 bytes corresponding to the data, and a checksum
+    for (uint8_t i = 0; i < 4; i++) {
+        // Wait for the serial data, timeout if it's been too long
+        // This only happened in testing with a loose wire, but does no
+        // harm to leave it in here
+        while(!SERIAL_UART_RXD_PRESENT){
+            timeout++;
+            if (timeout > 10000){
+                xprintf("\r\nTime out in keyboard.");
+                break;
+            }
+        }
+        uart_data[i] = SERIAL_UART_DATA;
+    }
+
+    // Check for the end packet, it's our checksum.
+    // Will only be a match if the correct bytes were recieved
+    if (uart_data[3] == (uart_data[0] ^ uart_data[1] ^ uart_data[2])) { // This is an arbitrary checksum calculated by XORing all the data.
+        // Transferring the keystates to the QMK matrix variable
+		/* ASSUMING MSB FIRST */
+		matrix[0] = ((uint16_t) uart_data[0] << 8) | ((uint16_t) uart_data[1]);
+		encoderValue += (int8_t) uart_data[2];
+		if ((uart_data[0] | uart_data[1] | uart_data[2])!=0){
+			xprintf("\r\n0x%0X%02X%02X",uart_data[0],uart_data[1], uart_data[2]);
+		}
+		/* OK, TURNS OUT THAT WAS A BAD ASSUMPTION */
+        for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+			// I've unpacked these into the mirror image of what QMK expects them to be, so...
+			matrix[i] = bitrev16(matrix[i]);
+			// So I'll reverse it, and this should be fine now.
+        }
+
+        // A mouse report for scrolling would go here, but I don't plan on doing scrolling with the encoder. So.
+
+    	report_mouse_t currentReport = {};
+/*
+    	currentReport = pointing_device_get_report();
+            //mouseReport.x = 127 max -127 min
+    	currentReport.x = (int8_t) uart_data[6];
+            //mouseReport.y = 127 max -127 min
+    	currentReport.y = (int8_t) uart_data[7];
+            //mouseReport.v = 127 max -127 min (scroll vertical)
+    	currentReport.v = (int8_t) uart_data[8];
+            //mouseReport.h = 127 max -127 min (scroll horizontal)
+    	currentReport.h = (int8_t) uart_data[9];
+        */
+    	/*
+    	currentReport.x = 0;
+    	currentReport.y = 0;
+    	currentReport.v = 0;
+        currentReport.h = 0;*/
+
+        pointing_device_set_report(currentReport);
+    } else {
+        xprintf("\r\nRequested packet, data 3 was %d",uart_data[3]);
+    }
+
+    matrix_scan_quantum();
+    return 1;
+}
+
+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_matrix_header();
+
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row); print(": ");
+        print_matrix_row(row);
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void)
+{
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += matrix_bitpop(i);
+    }
+    return count;
+}