Added USART implementation for PS/2 signal handling.

keymap.h

@@ -20,7 +20,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <stdint.h>
 #include <stdbool.h>
-#include "usb_keycodes.h"
 
 
 /* keycode in specific layer */

layer.c

@@ -19,6 +19,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "host.h"
 #include "debug.h"
 #include "timer.h"
+#include "usb_keycodes.h"
 #include "layer.h"
 
 

ps2_usart.c

@@ -95,10 +95,8 @@ static inline uint16_t wait_data_lo(uint16_t us);
 static inline uint16_t wait_data_hi(uint16_t us);
 static inline void idle(void);
 static inline void inhibit(void);
-#if defined PS2_USE_INT || defined PS2_USE_USART
 static inline uint8_t pbuf_dequeue(void);
 static inline void pbuf_enqueue(uint8_t data);
-#endif
 
 
 void ps2_host_init(void)

ps2_usb/Makefile.pjrc_usart

@@ -0,0 +1,56 @@
+#
+# Makefile for PJRC Teensy
+#
+
+
+# Target file name (without extension).
+TARGET = ps2_usb_pjrc_usart
+
+# Directory common source filess exist
+COMMON_DIR = ..
+
+# Directory keyboard dependent files exist
+TARGET_DIR = .
+
+# keyboard dependent files
+SRC =	main.c \
+	keymap.c \
+	matrix.c \
+	led.c \
+	ps2_usart.c
+
+CONFIG_H = config_pjrc_usart.h
+
+
+# MCU name, you MUST set this to match the board you are using
+# type "make clean" after changing this, so all files will be rebuilt
+#MCU = at90usb162       # Teensy 1.0
+MCU = atmega32u4       # Teensy 2.0
+#MCU = at90usb646       # Teensy++ 1.0
+#MCU = at90usb1286      # Teensy++ 2.0
+
+
+# Processor frequency.
+#   Normally the first thing your program should do is set the clock prescaler,
+#   so your program will run at the correct speed.  You should also set this
+#   variable to same clock speed.  The _delay_ms() macro uses this, and many
+#   examples use this variable to calculate timings.  Do not add a "UL" here.
+F_CPU = 16000000
+
+
+# Build Options
+#   *Comment out* to disable the options.
+#
+MOUSEKEY_ENABLE = yes	# Mouse keys
+EXTRAKEY_ENABLE = yes	# Audio control and System control
+NKRO_ENABLE = yes	# USB Nkey Rollover
+
+
+
+#---------------- Programming Options --------------------------
+PROGRAM_CMD = teensy_loader_cli -mmcu=$(MCU) -w -v $(TARGET).hex
+
+
+
+include $(COMMON_DIR)/pjrc.mk
+include $(COMMON_DIR)/common.mk

ps2_usb/README

@@ -1,40 +1,56 @@
 PS/2 to USB keyboard converter
 ==============================
 This firmware converts PS/2 keyboard protocol to USB and for now supports only Scan Code Set 2.
+This will works on USB AVR(ATMega32U4, AT90USB) or V-USB.
 
 
 Features
 --------
 Mouse keys
     You can emulates mouse move and button click using keyboard.
-
 System/Media control
     You can sends Power event, Volume down/up and Mute.
-
 USB NKRO(actually 120KRO+8Modifiers)
     You can tolggles NKRO feature.
-
 Keymap customization
     You can customize keymaps easily by editing source code. See keymap.c.
 
 
+PS/2 signal handling implementations
+------------------------------------
+Following three methods are used to implement PS/2 signal handling.
+a. Simple and stupid wait & read loop(intensive use of cycles)
+    This is implemented with (expected) portable C code for reference. See ps2.c.
+b. Interrupt driven
+    See ps2_intr.c
+c. Using USART hardware module(no cycle needed)
+    This uses AVR USART function to recevie PS/2 signal and be used in V-USB converter.
+    See ps2_usart.c.
+
+
 Build Converter
 ---------------
-0. Connect PS/2 keyboard into Teensy with 4 lines(Vcc, GND, Data, Clock).
-   By default Clock is on PF0 and Data on PF1.
-   You can change this pin configuration by editing config_pjrc.h.
-   In this photo Vcc is yellow, GND is green, Data is red and Clock is black.
-   http://img17.imageshack.us/img17/7243/201101181933.jpg
+Connect PS/2 keyboard into Teensy with 4 lines(Vcc, GND, Data, Clock).
+For a. Simple and stupid and b. Interrupt implementaion:
+    By default Clock is on PF0 and Data on PF1.
+    You can change this pin configuration by editing config_pjrc.h.
+    In this photo Vcc is yellow, GND is green, Data is red and Clock is black.
+    http://img17.imageshack.us/img17/7243/201101181933.jpg
+For c. USART implementation:
+    In case of Teensny(ATMega32u4) CLock is on PD2 and Data on PD5.
 
 
 Build Frimware
 --------------
 1. Edit Makefile for build options and MCU setting.
-   Use 'atmega32u4' for Teensy 2.0 or 'at90usb1286' for Teensy++ 2.0.
+    Use 'atmega32u4' for Teensy 2.0 or 'at90usb1286' for Teensy++ 2.0.
 2. make
-   Just type 'make' in a terminal.
+    Just type 'make' in a terminal.
+    Use '-f Makefile.pjrc_intr' option to use b. Interrupt.
+    Use '-f Makefile.pjrc_usart' option to use c. USART.
+    Use '-f Makefile.vusb' option to build V-USB converter.
 3. program with Teensy Loader.
-   http://www.pjrc.com/teensy/loader.html
+    http://www.pjrc.com/teensy/loader.html
 
 
 Demonstration of Features
@@ -97,34 +113,4 @@ To define keymap layer switching may needs a bit of your effort at this time.
     ),
 
 
-Multimedia keys
----------------
-Following lists PS/2 special keys supported by Windows.
-http://msdn.microsoft.com/en-us/windows/hardware/gg463372.aspx
-
-Key                         PS/2(Set2)      HID
----------------------------------------------------
-System Power                E0 37           01 0081
-System Sleep                E0 3F           01 0082
-System Wake                 E0 5E           01 0083
-System Mute                 E0 23           0C 00E2
-Volume Up                   E0 32           0C 00E9
-Volume Down                 E0 21           0C 00EA
-Scan Next Track             E0 4D           0C 00B5
-Scan Previous Track         E0 15           0C 00B6
-Stop                        E0 3B           0C 00B7
-Play/Pause                  E0 34           0C 00CD
-Media Select                E0 50           0C 0183
-Mail                        E0 48           0C 018A
-Calculator                  E0 2B           0C 0192
-My Computer                 E0 40           0C 0194
-WWW Search                  E0 10           0C 0221
-WWW Home                    E0 3A           0C 0223
-WWW Back                    E0 38           0C 0224
-WWW Forward                 E0 30           0C 0225
-WWW Stop                    E0 28           0C 0226
-WWW Refresh                 E0 20           0C 0227
-WWW Favorites               E0 18           0C 022A
-
-
 EOF

ps2_usb/config_pjrc_usart.h

@@ -0,0 +1,91 @@
+/*
+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/>.
+*/
+
+#ifndef CONFIG_H
+#define CONFIG_H
+
+/* controller configuration */
+#include "controller_teensy.h"
+
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x6513
+#define MANUFACTURER    t.m.k.
+#define PRODUCT         PS/2 keyboard converter(USART)
+#define DESCRIPTION     convert PS/2 keyboard to USB
+
+
+/* matrix size */
+#define MATRIX_ROWS 32  // keycode bit: 3-0
+#define MATRIX_COLS 8   // keycode bit: 6-4
+
+
+/* key combination for command */
+#define IS_COMMAND() ( \
+    keyboard_report->mods == (MOD_BIT(KB_LSHIFT) | MOD_BIT(KB_RSHIFT)) || \
+    keyboard_report->mods == (MOD_BIT(KB_LCTRL) | MOD_BIT(KB_RSHIFT)) \
+)
+
+
+/* mouse keys */
+#ifdef MOUSEKEY_ENABLE
+#   define MOUSEKEY_DELAY_TIME 255
+#endif
+
+
+/* PS/2 lines */
+#define PS2_CLOCK_PORT  PORTF
+#define PS2_CLOCK_PIN   PINF
+#define PS2_CLOCK_DDR   DDRF
+#define PS2_CLOCK_BIT   5
+#define PS2_DATA_PORT   PORTF
+#define PS2_DATA_PIN    PINF
+#define PS2_DATA_DDR    DDRF
+#define PS2_DATA_BIT    2
+
+
+// synchronous, odd parity, 1-bit stop, 8-bit data, sample at falling edge
+// set DDR of CLOCK as input to be slave
+#define PS2_USART_INIT() do {   \
+    PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);   \
+    PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);     \
+    UCSR1C = ((1 << UMSEL10) |  \
+              (3 << UPM10)   |  \
+              (0 << USBS1)   |  \
+              (3 << UCSZ10)  |  \
+              (0 << UCPOL1));   \
+    UCSR1A = 0;                 \
+    UBRR1H = 0;                 \
+    UBRR1L = 0;                 \
+} while (0)
+#define PS2_USART_RX_INT_ON() do {  \
+    UCSR1B = ((1 << RXCIE1) |       \
+              (1 << RXEN1));        \
+} while (0)
+#define PS2_USART_RX_POLL_ON() do { \
+    UCSR1B = (1 << RXEN1);          \
+} while (0)
+#define PS2_USART_OFF() do {    \
+    UCSR1C = 0;                 \
+    UCSR1B &= ~((1 << RXEN1) |  \
+                (1 << TXEN1));  \
+} while (0)
+#define PS2_USART_RX_READY      (UCSR1A & (1<<RXC1))
+#define PS2_USART_RX_DATA       UDR1
+#define PS2_USART_ERROR         (UCSR1A & ((1<<FE1) | (1<<DOR1) | (1<<UPE1)))
+#define PS2_USART_RX_VECT       USART1_RX_vect
+
+#endif