Keyboard: Palm serial keyboard USB converter (#4485)

* Initial palm_usb support

* removing left over sun .c file

* fixing licenses

* actually adding updated files

* fixing build error

* more include cleanup

keyboards/converter/palm_usb/config.h

@@ -0,0 +1,120 @@
+/*
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+
+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/>.
+*/
+
+/* This code makes use of cy384's Arduino USB HID adapter for the Palm Portable
+ Keyboard, released under the BSD licence */
+
+
+
+
+#pragma once
+
+#define CUSTOM_MATRIX 2
+
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x0001
+#define DEVICE_VER      0x0100
+#define MANUFACTURER    QMK
+#define PRODUCT         Stowaway converter
+#define DESCRIPTION     USB converter for Stowaway keyboard
+
+// IO pins to serial
+// https://deskthority.net/wiki/Arduino_Pro_Micro for pin lookup
+#define VCC_PIN D1 // pro micro 2 
+#define RX_PIN   D0 //pro micro 3 , was 8 on cy384
+#define RTS_PIN  C6 // 5  //[ was D4 // 4 on the cy384
+#define DCD_PIN  E6  //7 
+
+// if using the particular arduino pinout of CY384
+#ifdef CY384 
+    #define GND_PIN  D7 //6
+    #define PULLDOWN_PIN  B1 // 15
+#endif
+
+#ifndef HANDSPRING
+// Set to 1 for Handspring or to disable RTS/DCD based handshake. 
+    #define HANDSPRING 0
+#endif
+
+#define MAXDROP 10 // check if keyboard is connected every X polling cycles
+#define SLEEP_TIMEOUT 500000 // check keyboard/reset this many millis
+
+
+#define MATRIX_ROWS 12
+#define MATRIX_COLS 8
+
+/* key combination for command */
+#define IS_COMMAND() ( \
+    keyboard_report->mods == (MOD_BIT(KC_LALT) | MOD_BIT(KC_RALT)) || \
+    keyboard_report->mods == (MOD_BIT(KC_LGUI) | MOD_BIT(KC_RGUI)) || \
+    keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
+)
+
+
+/* Serial(USART) configuration
+ *     asynchronous, negative logic, 9600baud, no flow control
+ *     1-start bit, 8-data bit, non parity, 1-stop bit
+ */
+#define SERIAL_SOFT_BAUD            9600
+#define SERIAL_SOFT_PARITY_NONE
+#define SERIAL_SOFT_BIT_ORDER_LSB
+#if (HANDSPRING == 0)
+    #define SERIAL_SOFT_LOGIC_NEGATIVE  //RS232 logic
+#endif 
+/* RXD Port */
+#define SERIAL_SOFT_RXD_ENABLE
+    
+// we are using Pro micro pin 3 / D0 as serial
+#define SERIAL_SOFT_RXD_DDR         DDRD
+#define SERIAL_SOFT_RXD_PORT        PORTD
+#define SERIAL_SOFT_RXD_PIN         PIND
+#define SERIAL_SOFT_RXD_BIT         0
+#define SERIAL_SOFT_RXD_VECT        INT0_vect
+
+/* RXD Interupt */
+#define SERIAL_SOFT_RXD_INIT()      do { \
+    /* pin configuration: input with pull-up */ \
+    SERIAL_SOFT_RXD_DDR &= ~(1<<SERIAL_SOFT_RXD_BIT); \
+    SERIAL_SOFT_RXD_PORT |= (1<<SERIAL_SOFT_RXD_BIT); \
+    /* enable interrupt: INT0(rising edge) */ \
+    EICRA |= ((1<<ISC01)|(1<<ISC00)); \
+    EIMSK |= (1<<INT0); \
+    sei(); \
+} while (0)
+#define SERIAL_SOFT_RXD_INT_ENTER()
+#define SERIAL_SOFT_RXD_INT_EXIT()  do { \
+    /* clear interrupt  flag */ \
+    EIFR = (1<<INTF0); \
+} while (0)
+#define SERIAL_SOFT_RXD_READ()      (SERIAL_SOFT_RXD_PIN&(1<<SERIAL_SOFT_RXD_BIT))
+
+/* TXD Port */
+#define SERIAL_SOFT_TXD_ENABLE
+#define SERIAL_SOFT_TXD_DDR         DDRD
+#define SERIAL_SOFT_TXD_PORT        PORTD
+#define SERIAL_SOFT_TXD_PIN         PIND
+#define SERIAL_SOFT_TXD_BIT         3
+#define SERIAL_SOFT_TXD_HI()        do { SERIAL_SOFT_TXD_PORT |=  (1<<SERIAL_SOFT_TXD_BIT); } while (0)
+#define SERIAL_SOFT_TXD_LO()        do { SERIAL_SOFT_TXD_PORT &= ~(1<<SERIAL_SOFT_TXD_BIT); } while (0)
+#define SERIAL_SOFT_TXD_INIT()      do { \
+    /* pin configuration: output */ \
+    SERIAL_SOFT_TXD_DDR |= (1<<SERIAL_SOFT_TXD_BIT); \
+    /* idle */ \
+    SERIAL_SOFT_TXD_ON(); \
+} while (0)
+
+