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Add ADB protocol files from blargg's work

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- <http://geekhack.org/index.php?topic=14290.msg1070604#msg1070604>
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tmk 2013-10-11 10:12:22 +09:00
parent 86082f90fa
commit 59ecced486
3 changed files with 385 additions and 0 deletions
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131
converter/adb_usb/Makefile.blargg Normal file
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#----------------------------------------------------------------------------
# On command line:
#
# make all = Make software.
#
# make clean = Clean out built project files.
#
# make coff = Convert ELF to AVR COFF.
#
# make extcoff = Convert ELF to AVR Extended COFF.
#
# make program = Download the hex file to the device.
# Please customize your programmer settings(PROGRAM_CMD)
#
# make teensy = Download the hex file to the device, using teensy_loader_cli.
# (must have teensy_loader_cli installed).
#
# make dfu = Download the hex file to the device, using dfu-programmer (must
# have dfu-programmer installed).
#
# make flip = Download the hex file to the device, using Atmel FLIP (must
# have Atmel FLIP installed).
#
# make dfu-ee = Download the eeprom file to the device, using dfu-programmer
# (must have dfu-programmer installed).
#
# make flip-ee = Download the eeprom file to the device, using Atmel FLIP
# (must have Atmel FLIP installed).
#
# make debug = Start either simulavr or avarice as specified for debugging,
# with avr-gdb or avr-insight as the front end for debugging.
#
# make filename.s = Just compile filename.c into the assembler code only.
#
# make filename.i = Create a preprocessed source file for use in submitting
# bug reports to the GCC project.
#
# To rebuild project do "make clean" then "make all".
#----------------------------------------------------------------------------
# Target file name (without extension).
TARGET = adb_usb_blargg
# Directory common source filess exist
TOP_DIR = ../..
# Directory keyboard dependent files exist
TARGET_DIR = .
# project specific files
SRC = keymap.c \
matrix.c \
led.c \
adb_blargg.c
CONFIG_H = config.h
# MCU name
#MCU = at90usb1287
MCU = atmega32u4
# Processor frequency.
# This will define a symbol, F_CPU, in all source code files equal to the
# processor frequency in Hz. You can then use this symbol in your source code to
# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
# automatically to create a 32-bit value in your source code.
#
# This will be an integer division of F_USB below, as it is sourced by
# F_USB after it has run through any CPU prescalers. Note that this value
# does not *change* the processor frequency - it should merely be updated to
# reflect the processor speed set externally so that the code can use accurate
# software delays.
F_CPU = 16000000
#
# LUFA specific
#
# Target architecture (see library "Board Types" documentation).
ARCH = AVR8
# Input clock frequency.
# This will define a symbol, F_USB, in all source code files equal to the
# input clock frequency (before any prescaling is performed) in Hz. This value may
# differ from F_CPU if prescaling is used on the latter, and is required as the
# raw input clock is fed directly to the PLL sections of the AVR for high speed
# clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
# at the end, this will be done automatically to create a 32-bit value in your
# source code.
#
# If no clock division is performed on the input clock inside the AVR (via the
# CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
F_USB = $(F_CPU)
# Interrupt driven control endpoint task(+60)
#OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
# Boot Section Size in *bytes*
# Teensy halfKay 512
# Teensy++ halfKay 1024
# Atmel DFU loader 4096
# LUFA bootloader 4096
# USBaspLoader 2048
OPT_DEFS += -DBOOTLOADER_SIZE=4096
# Build Options
# comment out to disable the options.
#
BOOTMAGIC_ENABLE = yes # Virtual DIP switch configuration(+1000)
MOUSEKEY_ENABLE = yes # Mouse keys(+4700)
EXTRAKEY_ENABLE = yes # Audio control and System control(+450)
CONSOLE_ENABLE = yes # Console for debug(+400)
COMMAND_ENABLE = yes # Commands for debug and configuration
#SLEEP_LED_ENABLE = yes # Breathing sleep LED during USB suspend
#NKRO_ENABLE = yes # USB Nkey Rollover - not yet supported in LUFA
# Optimize size but this may cause error "relocation truncated to fit"
#EXTRALDFLAGS = -Wl,--relax
# Search Path
VPATH += $(TARGET_DIR)
VPATH += $(TOP_DIR)
include $(TOP_DIR)/protocol/lufa.mk
include $(TOP_DIR)/protocol.mk
include $(TOP_DIR)/common.mk
include $(TOP_DIR)/rules.mk

216
converter/adb_usb/adb_blargg.c Normal file
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// Bit-banged implementation without any use of interrupts.
// Data pin must have external 1K pull-up resistor.
// Operates data pin as open-collector output.
#include "adb_blargg.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
// Copyright 2011 Jun WAKO <wakojun@gmail.com>
// Copyright 2013 Shay Green <gblargg@gmail.com>
// See bottom of file for license
typedef uint8_t byte;
// Make loop iteration take us total, including cyc overhead of loop logic
#define delay_loop_usec( us, cyc ) \
__builtin_avr_delay_cycles( (unsigned long) (F_CPU / 1e6 * (us) + 0.5) - (cyc) )
#if !defined(ADB_PORT) || \
!defined(ADB_PIN) || \
!defined(ADB_DDR) || \
!defined(ADB_DATA_BIT)
#error
#endif
enum { data_mask = 1<<ADB_DATA_BIT };
enum { adb_cmd_read = 0x2C };
enum { adb_cmd_write = 0x28 };
// gcc is very unreliable for inlining, so use macros
#define data_lo() (ADB_DDR |= data_mask)
#define data_hi() (ADB_DDR &= ~data_mask)
#define data_in() (ADB_PIN & data_mask)
static void place_bit( byte bit )
{
// 100 us bit cell time
data_lo();
_delay_us( 35 );
// Difference between a 0 and 1 bit is just this 30us portion in the middle
if ( bit )
data_hi();
_delay_us( 30 );
data_hi();
_delay_us( 35 );
}
static void place_bit0( void ) { place_bit( 0 ); }
static void place_bit1( void ) { place_bit( 1 ); }
static void send_byte( byte data )
{
for ( byte n = 8; n; n-- )
{
place_bit( data & 0x80 );
data <<= 1;
}
}
static void command( byte cmd )
{
data_lo();
_delay_us( 800 );
place_bit1();
send_byte( cmd );
place_bit0();
}
void adb_host_init( void )
{
// Always keep port output 0, then just toggle DDR to be GND or leave it floating (high).
ADB_DDR &= ~data_mask;
ADB_PORT &= ~data_mask;
#ifdef ADB_PSW_BIT
// Weak pull-up
ADB_PORT |= (1<<ADB_PSW_BIT);
ADB_DDR &= ~(1<<ADB_PSW_BIT);
#endif
}
bool adb_host_psw( void )
{
#ifdef ADB_PSW_BIT
return (ADB_PIN & (1<<ADB_PSW_BIT)) != 0;
#else
return true;
#endif
}
// Waits while data == val, or until us timeout expires. Returns remaining time,
// zero if timed out.
static byte while_data( byte us, byte data )
{
while ( data_in() == data )
{
delay_loop_usec( 1 /* us period */, 7 /* cycles loop overhead */ );
if ( !--us )
break;
}
return us;
}
static byte while_lo( byte us ) { return while_data( us, 0 ); }
static byte while_hi( byte us ) { return while_data( us, data_mask ); }
static uint16_t adb_host_talk( byte cmd )
{
command( cmd );
_delay_us( 5 );
if ( !while_hi( 260 - 5 ) ) // avg 160
return adb_host_nothing;
// Receive start bit and 16 data bits.
// Doing them all in loop allows consistent error checking
uint16_t data = 0;
byte n = 17;
do
{
data <<= 1;
enum { timeout = 130 }; // maximum bit cell time
byte lo = while_lo( timeout );
if ( !lo )
goto error; // timeout
byte hi = while_hi( lo );
if ( !hi )
goto error; // timeout
if ( timeout-lo < lo-hi )
data |= 1;
else if ( n == 17 )
goto error; // start bit is wrong
}
while ( --n );
// duration must be split in two due to 255 limit
if ( !while_lo( 255 ) && !while_lo( 351 - 255 ) )
goto error;
if ( while_hi( 91 ) )
goto error;
return data;
error:
return adb_host_error;
}
uint16_t adb_host_kbd_recv( void )
{
return adb_host_talk( adb_cmd_read + 0 );
}
uint16_t adb_host_kbd_modifiers( void )
{
return adb_host_talk( adb_cmd_read + 2 );
}
void adb_host_listen( byte cmd, byte data_h, byte data_l )
{
command( cmd );
_delay_us( 200 );
place_bit1();
send_byte( data_h );
send_byte( data_l );
place_bit0();
}
void adb_host_kbd_led( byte led )
{
adb_host_listen( adb_cmd_write + 2, 0, led & 0x07 );
}
/* This software is licensed with a Modified BSD License.
All of this is supposed to be Free Software, Open Source, DFSG-free,
GPL-compatible, and OK to use in both free and proprietary applications.
Additions and corrections to this file are welcome.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */

38
converter/adb_usb/adb_blargg.h Normal file
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// Basic support for ADB keyboard
#ifndef ADB_BLARGG_H
#define ADB_BLARGG_H
#include <stdint.h>
#include <stdbool.h>
// Sets up ADB bus. Doesn't send anything to keyboard.
void adb_host_init( void );
// Receives key press event from keyboard.
// 0xKKFF: one key changed state
// 0xKKKK: two keys changed state
enum { adb_host_nothing = 0 }; // no keys changed state
enum { adb_host_error = 0xFFFE }; // receive error
uint16_t adb_host_kbd_recv( void );
// Current state of keyboard modifiers and a few other keys
// Returns adb_host_nothing if keyboard didn't respond.
// Returns adb_host_error if error receiving.
uint16_t adb_host_kbd_modifiers( void );
// Sends command and two bytes of data to keyboard
void adb_host_listen( uint8_t cmd, uint8_t data_h, uint8_t data_l );
// Sets keyboard LEDs. Note that bits are inverted here, so 1 means off, 0 means on.
void adb_host_kbd_led( uint8_t led );
// State of power switch (false = pressed), or true if unsupported
bool adb_host_psw( void );
// Legacy support
#define ADB_POWER 0x7F
#define ADB_CAPS 0x39
#endif