Added Dichotemy Keyboard, updated docs for Pointing Device (#1817)

* Added Dichotemy Keyboard, updated docs for Pointing Device

* Updated readme

* Updated mouse report pointer in pointing_device.c

keyboards/dichotemy/dichotemy.c

@@ -0,0 +1,86 @@
+#include "dichotemy.h"
+#include "pointing_device.h"
+#include "report.h"
+
+void uart_init(void) {
+	SERIAL_UART_INIT();
+}
+
+void pointing_device_task(void){
+	report_mouse_t currentReport = {};
+    SERIAL_UART_INIT();
+    uint32_t timeout = 0;
+
+    //the m character requests the RF slave to send the mouse report
+    SERIAL_UART_DATA = 'm';
+
+    //trust the external inputs completely, erase old data
+    uint8_t uart_data[5] = {0};
+
+    //there are 10 bytes corresponding to 10 columns, and an end byte
+    for (uint8_t i = 0; i < 5; 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){
+                break;
+            }
+        } 
+        uart_data[i] = SERIAL_UART_DATA;
+    }
+
+    //check for the end packet, bits 1-4 are movement and scroll
+    //but bit 5 has bits 0-3 for the scroll button state
+	//(1000 if pressed, 0000 if not) and bits 4-7 are always 1
+	//We can use this to verify the report sent properly.
+    if (uart_data[4] == 0x0F || uart_data[4] == 0x8F)
+    {
+		currentReport = pointing_device_get_report();
+        //shifting and transferring the info to the mouse report varaible
+        //mouseReport.x = 127 max -127 min
+		currentReport.x = uart_data[0];
+        //mouseReport.y = 127 max -127 min
+		currentReport.y = uart_data[1];
+        //mouseReport.v = 127 max -127 min (scroll vertical)
+		currentReport.v = uart_data[2];
+        //mouseReport.h = 127 max -127 min (scroll horizontal)
+		currentReport.h = uart_data[3];
+        //mouseReport.buttons = 0x31 max (bitmask for mouse buttons 1-5) 0x00 min
+		//mouse buttons 1 and 2 are handled by the keymap, but not 3
+		if (uart_data[4] == 0x0F) { //then 3 is not pressed
+			currentReport.buttons &= ~MOUSE_BTN3; //MOUSE_BTN3 is def in report.h
+		} else { //3 must be pressed
+			currentReport.buttons |= MOUSE_BTN3;
+		}
+		pointing_device_set_report(currentReport);
+    }
+    pointing_device_send();
+}
+
+void led_init(void) {
+	DDRD  |= (1<<1);
+	PORTD |= (1<<1);
+	DDRF  |= (1<<4) | (1<<5);
+	PORTF |= (1<<4) | (1<<5);
+}
+
+
+void matrix_init_kb(void) {
+	// put your keyboard start-up code here
+	// runs once when the firmware starts up
+	matrix_init_user();
+	uart_init();
+	led_init();
+}
+
+void matrix_scan_kb(void) {
+	// put your looping keyboard code here
+	// runs every cycle (a lot)
+	matrix_scan_user();
+}
+
+void led_set_kb(uint8_t usb_led) {
+
+}