Add ADB protocol files from blargg's work
- <http://geekhack.org/index.php?topic=14290.msg1070604#msg1070604>
This commit is contained in:
tmk
parent
86082f90fa
commit
59ecced486
|
|
@ -0,0 +1,131 @@
|
||||||
|
#----------------------------------------------------------------------------
|
||||||
|
# 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
|
||||||
|
|
@ -0,0 +1,216 @@
|
||||||
|
// 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. */
|
||||||
|
|
@ -0,0 +1,38 @@
|
||||||
|
// 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
|
||||||
Loading…
Reference in New Issue