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add hhkb bluetooth functionality (rn42)

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pretty much straight from tmk

some minor changes to make things work
pull/2693/head
Enochen 7 years ago
parent d777a05864
commit 235a9f6fbd
14 changed files with 2040 additions and 0 deletions
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41
keyboards/hhkb/config.h
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@ -54,6 +54,47 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
)
#ifdef HHKB_RN42_ENABLE
// rn42 support -- acquired from the tmk repo. This is almost certainly not
// integrated with qmk in the correct way.
#define SUART_OUT_PORT PORTD
#define SUART_OUT_BIT 0
#define SUART_IN_PIN PIND
#define SUART_IN_BIT 1
#ifdef __AVR_ATmega32U4__
/* iom32u4.h has no definition of UCSR1D. copy from iom32u2.h */
#define UCSR1D _SFR_MEM8(0xCB)
#define RTSEN 0
#define CTSEN 1
#define SERIAL_UART_BAUD 115200
#define SERIAL_UART_DATA UDR1
#define SERIAL_UART_UBRR ((F_CPU/(16.0*SERIAL_UART_BAUD)-1+0.5))
#define SERIAL_UART_RXD_VECT USART1_RX_vect
#define SERIAL_UART_TXD_READY (UCSR1A&(1<<UDRE1))
#define SERIAL_UART_INIT() do { \
UBRR1L = (uint8_t) SERIAL_UART_UBRR; /* baud rate */ \
UBRR1H = ((uint16_t)SERIAL_UART_UBRR>>8); /* baud rate */ \
UCSR1B |= (1<<RXCIE1) | (1<<RXEN1); /* RX interrupt, RX: enable */ \
UCSR1B |= (0<<TXCIE1) | (1<<TXEN1); /* TX interrupt, TX: enable */ \
UCSR1C |= (0<<UPM11) | (0<<UPM10); /* parity: none(00), even(01), odd(11) */ \
UCSR1D |= (0<<RTSEN) | (0<<CTSEN); /* RTS, CTS(no flow control by hardware) */ \
DDRD |= (1<<5); PORTD &= ~(1<<5); /* RTS for flow control by firmware */ \
sei(); \
} while(0)
#define SERIAL_UART_RTS_LO() do { PORTD &= ~(1<<5); } while (0)
#define SERIAL_UART_RTS_HI() do { PORTD |= (1<<5); } while (0)
#else
#error "USART configuration is needed."
#endif
/* power control of key switch board */
#define HHKB_POWER_SAVING
#endif
/*
* Feature disable options
* These options are also useful to firmware size reduction.

262
keyboards/hhkb/rn42/MEMO.txt
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Memo of deveopment
==================
just memo, NOT WORTH READING
2015/11/24
JP Bluetooth:
RN-42 cannot send Japanese keys like; henkan, mu-henkan and kana, JPY and RO.
It seems HID usage more than 0x65 cannot be send with the module.
http://shiki.esrille.com/2014/07/bluetoothnisse.html
Bug:
- Factory Reset PIO4 doesn't work
- the reason is unclear - 12/08 NOT LOOK INTO ANY MORE
- WORKAROUND: use serial pins(3.3V, GND, RX and TX)
- SF,1 and R,1 to set factory defalult
Todo:
- LED cover and switch knob and new Slide Switch
- RN42 auto configuration
- configure the module as HID device every time powering up
- this'll reduce work load of assembly
- move rn42 to protocol directory when it becomes reusable stack
- sendchar() in lufa.c no buffer
- no buffering. character lost can be caused.
- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
- BT operations
- disconnect
- new connection
- remove connection
- sendchar() in lufa.c block loop - DONE 11/29
- block loop when powered with AC adapter
- FrameNumber is not updated when adapter powered
Improving:
- ADC resolution
AVR120
AVR32138
- Enhancing ADC resolution by oversampling
AVR121 http://www.atmel.com/images/doc8003.pdf
- disable digital input buffer DIDR(7.8.6)
Design:
- suspend.h - DONE 11/26
- remove argument from suspend_power_down() for backward compatitibility
- remove MCU dependent power saving code from core/keyboard - DONE 11/23
- it should be located in project matrix.c
- HHKB matrix.c needs matrix_prev?
- is_modified() is obsolete now. really needs?
- ADC: removing AREF capacitor C10
- seems to be better while usb powered
- still bad while battery powered
http://electronics.stackexchange.com/questions/105849/avcc-and-capacitor-using-adc
- ADC: smaller resistors for voltage dividor
- 1K + 1K: not improved. - 11/27
LUFA:
USB connection check: state of USB deivce
- USB_DeviceState:
USB_Deivce_State_t { Unattached, Powered, Default, Addressed, Configured*, Suspended* }
Unattached: unpluged
Powered: pluged with power adapter
Default: enumerate process bigin
Addressed: addressed
Configured: enumerated
Suspended: suspended
- USB_IsInitialized: state of LUFA core setup
becomes true in USB_Init() USBController_AVR8.c
becomes false in USB_Disable() USBController_AVR8.c
- USB_VBUS_GetStatus(): state of VBUS(power/connection)
- USB_Disable() detaches, disables all interrupts, controller, PLL, regulater.
- When connect to power adapter
- event happened: CW or CSW or C or DDC
- USB state: not configured
- USB evnets
- USB connect: CSWRWRW
- USB connect but fail to enumeration: CWRWRWRWS
- USB disconnect: D
- Power adapter connect: CW, CSW, C
- Power adapter disconnect: D
Power saving:
- Pro2 current consumption
- active: 138.2mA(no device on Hub)
- suspended: 30.9mA(WakeUp enabled DIPSW6)
- suspended: 0mA->46.0mA(WakeUp disabled DIPSW6)
- Pro current consumption
- active: 54.0mA
- suspended: 40.5mA(WakeUp enabled DIPSW6)
- suspended: 0.3mA(WakeUp disabled DIPSW6)
- RN42 3.3V
- disconnected(Idle): 5mA (config mode)
- connected(Active):
SW,0000: 23-26mA
SW,0010: 27-29mA worse than 0000 for unknown reason
SW,0020: 17-19mA mouse NG
SW,0030: 13-16mA laggy mouse NG
SW,0050: 10-13mA laggy mouse NG
- matrix power saving
- power saving while externally powered and not while unpluged
- confirm suspend mode lufa.c: matrix_power_*, suspend_wakeup_condition
- 8MHz clock
- When not connected in a few minutes get into deep sleep to save battery life
- CTS is needed for waking up from deep sleep? How deep sleep is activated?
- firmware controlled 3.3V DC converter to switch on/off BT module
- sleep MCU and BT module(keyboard is not used)
- deep sleep MCU and BT module(keyboard is not used for long time)
- deep sleep MCU and turn off BT module(keyboard is not used and not connected)
- Battery ADC; switching, high resistance
- switching gnd end of divider with PF4
- high resistor 100K/1M?
capacitor 10nF
http://www.eevblog.com/forum/beginners/measuring-battery-voltage-without-consuming-current/
- During USB suspend change clock source to internal RC from external Xtal(6.8)
- FRZCLK: you can freeze clock for power saving. still WAKEUPI and VBUSTI interrupts are available while freezing.(21.7.3)
- Suspend: Clear Suspend Bit, Freeze clock, disable PLL, MCU sleep(21.13)
- Voltage reference(8.1.1)
- to reduce power consumption while power down mode
- unset ADEN before sleep(24.7)
Lipo
----
850mA lasts around 9 hours(07/28)
Sparkfun Polymer Lithium Ion Battery 850mAh:
https://www.sparkfun.com/products/341
Lipo Cell spec:
https://www.sparkfun.com/datasheets/Batteries/063048%20Li-polymer.pdf
Protection spec:
http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/BatteryProtection.pdf
min typical max
over-charge 4.255 4.280 4.305
over-charge discover? 4.030 4.080 4.130
over-discharge 2.827 2.900 2.973
over-discharge discover 3.022 3.100 3.178
ADC voltage monitor: voltage divider 10K+10K(0.5)
ADC=V*0.5/2.56*1024
V ADC
------------------
4.20 0x347(839)
3.10 0x26b(619)
TROUBLE SHOOT
-------------
07/16 After fix of voltage dividor on GPIO6, had a trouble that it could not send a char to BT module, though could receive.
Found R8 had wrong 1K resistor and changed to 10K, after that it can send to the module again. Not sure how it had sent with the wrong 1K before.
07/18 On Linux, had an USB related trouble; keyboard or console didn't work for some reason. Changing PID cured this problem. Very annoying, took very long time before resolved it.
12/07 rn42_rts() read 1 every time. R12 broke in open mode(no coductive), idk why, too much heat with soldering? and PF1 pin was not soldered.
It resolved with resoldering PF1 and new resistor on R12.
Done:
- low battery alert(solid light) 09/04
- *** Rev.E BT test *** - DONE
- with MCP73832, new Schottky, tantalum caps - DONE 12/07
* MCP73832 doesn't leak from Vcc pin when unpluged and battery powered
34mV vs 2.07V(MCP73831) at Vcc pin
MCP73832 doesn't need revese protection diode D5
* PMEG2010ER is very low VF while reverse current/voltage is high
VF=0.96 vs 1.98(RB160M-30TR)with Fluke 175
Anode of D11 is 680mV vs 20mV(RB160M-30TR)
780mV is still low < 1.4V VBUS plugin detection(21.11)
this doesn't cause false VBUS detect
and 780mV on MCP73832 Vcc pin is also no problem.
D5 can be removed.
- ADC divider switching - DONE 12/07
* Drain and Source of Q4 Pch was reversed wrongly on Rev.E.
- reverse current from Lipo charger - DONE 12/07
* MCP73832 has no recverse current from Vcc pin unlike MCP73831
- Rev.F design - DONE
- current measure point - DONE 12/08
- change value of cap 68->47 - DONE 12/08
- PPTC land pattern: no solder jumper, use 0Ohm resistor instead - CANCEL 12/08
- Q4 Pch FET: wrong Drain and Source - DONE 12/08
- D5 can be removed. - DONE 12/08
- BT_INDICATOR LED turns on wrongly when touching line or pin. -- pull-up enabled on PF6/GPIO2 08/30
- Lipo charger configuration: fast charge time: USB charger spec? -- used 2kohm
- use LED of charger to alarm low battery. LED should be powered directly from Lipo? - cancel; powered from VUSB
- Use RTS in serial_uart.c to resolve missing chars from help message of RN-42 - done
- CTS/RTS lines are needed? just connect in loop back if no flow control is needed. - done
- add IO pin to charger status CHRG; LED control(low) and detect charge status(input HiZ) 07.24
- LINKED: add trace on PIO2 to PF6 07.24
- Lipo voltage ADC sensing
- Lipo charger MCP73831: needs capacitor 4.7uF *2
- USB connection check - 07.01
- BT on/off check: whether RX line is pulled up? - checking RTS 07.01
- USB/BT switching BT is on -> BT, BT is off -> USB - 07.01
- Under voltage lock out UVLO for protection of Lipo - Lipo has discharge protection at 3.100V 07.01
- Power saving: HHKB scan, BT radio control - 9h with 850mAh, this is enough 07.01
- Power selector doesn't work; Q4 MOSFET leaks from Lipo to USB power line. -- use Schottky instead 07/04
- wrongly suspended when powered from adapter without USB connection - DONE
- suspend event may occur when plug into adapter
- and never wake until conected to real USB line
- without debug print via USB no problem; CSW(wake just after suspend as real USB line)
- seems like USB print causes this problem after suspended
- lose USB connection during power-down mode - DONE
- USB initialize code in main() causes this - WRONG
- Do not power-down during USB connection is active - DONE 11/11
(USB_DeviceState == USB_DEVICE_Configured) is used to check USB connection
matrix_power_down() matrix.c - 11/23
- with Nexus5 keyboard and mouse are very laggy.
Not confirmed. 01/15
- switch BT host connections - CANCEL 01/15
- switch next connection
cannot switch connection with version 6.15 at least
- When given power only from wall wart adapter - DONE? not confirmed 01/15
- it sleeps. it should not sleep
- Configured state without USB connection?
- timer is slow while power down - DONE 11/26
- time out interrupt is lost while power down?
- interrupt of watchdog timer compensates timer counter(avr/suspend.c)
- repeated CHARGING/FULL_CHARGED - No longer problem 01/15
- In LTC sharp pulses are observed.
- MCP has no pulse but still has a problem.
- needs more wait before read pin state? - NO
- USB plug-in fails while BT - No longer problem 01/15
- it ends in suspend state
- maybe, not responsive to host enumeration process due to power-down.
- matrix_power_down() only when state is unattached - 11/26
- need to observe a while

88
keyboards/hhkb/rn42/PowerSave.txt
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Power Saving
============
MCU+HHKB Power Comsumption
--------------------------
Battery drive:
idle 18.9mA
active 35.8mA
USB powered:
40.0mA
52mA 01/17
Other keyboards:
HHKB Pro 55mA
HHKB Pro2 140mA
HHKB Pro 42mA(Alt)
HHKB Pro2 52mA(Alt BT controller USB mode)
HHKB Pro2 88mA(Alt BT controller BT mode connected)
HHKB Pro2 68mA(Alt BT controller BT mode config mode)
Poker X 6mA
Infinity 24mA(TMK)
65mA(kiibohd)
HHKB key switch power control
-----------------------------
MOS FET Nch: BSS138 or IRLML6344T, either works and no apparent difference.
Normally on(pull-up) or off(pull-down)? interms of power saving it prefers pull-down?
Pull-down will be better for power saving, normally off.
Used Timer
----------
8MHz clock
----------
1) 16MHz xtal with system prescaler div2: F_CPU=8MHz, F_USB=16MHz
2) 8MHz xtal with div1: F_CPU=8MHz, F_USB=8MHz
Hardware USART doesn't work at 115200bps with 8MHz(F_CPU).
workaround:
a) use Sotwre serial for communcation with RN-42
b) reduce baud of RN-42 to lower rate;(factory default is 115200bps)
10/03
Slave mode
----------
Discovery/Inquire
Connect/Page
SI,0012
SJ,0012
InqWindw=0100
PagWindw=0100
Sniff mode
----------
0.625ms * <hex>
SW,0320 Very sluggish. Type is not lost but very slow to register.
SW,0160 Still sluggish. may transposed? can type but ...
Mouse point move intermittently
SW,0020 feel a bit late like stumble(20ms)
SW,0010 feel no latency(10ms)
Deep sleep
----------
SW,8010
TX power
--------
SY,fff4
IO pins
-------
S%,1000 status led and connection control don't work
GPIO5: status LED
GPIO6: Connection control
GPIO2: linked status

408
keyboards/hhkb/rn42/RN42.txt
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RN-42 Bluetooth Module Support
==============================
Bluetooth controller board works with HHKB Pro2, JP, Type-S and Type-S JP and it supports both USB and Bluetooth as keyboard output protocol. Bluetooth module Roving Networks/Microchip RN-42 is installed on the board.
RN-42:
http://www.microchip.com/wwwproducts/Devices.aspx?product=RN42
Capabitlities:
- USB keyboard functions
completely equivarent to USB controller including mouse keys and NKRO.
- Switching between USB and Bluetooth
You can switch the two connections with BT switch or key combination.
- RN-42 config mode
You can change power/connection configuration of the module if needed.
- Low battery alert
Red LED turns on when low voltage.
- RN-42 status indicator
LED indicates status of Bluetooth connection.
- Pairing
The module stores up to 8 connections.
- Auto connect
The module connects the last connected device automatically.
- iOS support
works as keyboard with iPhone5. No tested completely.
- Android support
works as keyboard and mouse with Nexus5. No tested completely.
- Mouse keys over BT
Note that iOS doesn't accept mouse device.
Limitations:
- Short battery life
Around 12hr with 1000mAh
- No connection switching
RN-42 auto-connects to the last connected device.
Some of consumer products can switch between devices, for example Logitech K480.
http://www.logitech.com/en-us/product/multi-device-keyboard-k480?crid=26
- HHKB JP requires case modification for BT switch and LEDs.
without switch power controlled by MCU? Probably using 3.3V regulator enable pin power of RN-42 can be controlled.
NOTE:
- LIPO BATTERY IS VERY DANGEROUS, TAKE EXTRA CARE OF YOUR SAFETY AND PROPERTY.
- RN-42 version 6.15 is supported.
- No NKRO over Bluetooth
- Check you country's wiress regulation and certification of RN-42.
Bugs:
Todos:
Lipo Battery
------------
You can use 3.7V Lithium Ion battery with JST PH 2pin connector and protection circuit.
Battery space inside HHKB is around 54mm x 50mm and its height is 7mm.
Sparkfun 850mAh
https://www.sparkfun.com/products/341
Sparkfun 1000mAh
https://www.sparkfun.com/products/339
Sparkfun 2000mAh battery won't fit due to its size.
Learn about Lipo battery:
https://learn.adafruit.com/li-ion-and-lipoly-batteries
LED Status
----------
Configuring 10 times per sec
Startup/configuration timer 2 times per sec
Discoverable/Inquiring/Idle once per sec
Connected solid on
RN-42 Magic Command
--------------------
Magic key combination is 'LShift+RShift' by default in case of HHKB.
Here is help.
----- Bluetooth RN-42 Help -----
i: RN-42 info
b: battery voltage
Del: enter/exit RN-42 config mode
Slck: RN-42 initialize
p: pairing
u: toggle Force USB mode
RN-42 info: displays information of the module on console.
battery voltage: displays current voltage of battery and uptime.
RN-42 initialize: does factory reset and configures RN-42
pairing: enters Pairing mode.
toggle Force USB mode: switch between USB and Bluetooth
RN-42 Config mode
-----------------
You can tune/operate RN-42 yourself with config(command) mode.
1. hook up USB cable
2. run `hid_listen` command in console
3. turn on Bluetooth switch
4. press LShift+RShift+Delete(Fn+~) you will see output like followings:
Entering config mode ...
CMD
v
Ver 6.15 04/26/2013
(c) Roving Networks
5. do config with RN-42 commands. See documentations of RN-42.
6. to exit also press LShift+RShift+Delete(Fn+~)
Exiting config mode ...
---
END
RN-42 Initial Configuration
---------------------------
RN-42 is configured as SPP device at factory reset, you need to configure it as HID device. This is needed just once first time.
1. hook up USB cable
2. run `hid_listen` command in console
3. turn on Bluetooth switch
4. press LShift+RShift+ScrLk(Fn+O) you will see output like followings:
Entering config mode ...
CMD
Ver 6.15 04/26/2013
(c) Roving Networks
ECHO ON
SF,1
AOK
S-,TmkBT
AOK
SS,Keyboard/Mouse
AOK
SM,4
AOK
SW,8000
AOK
S~,6
AOK
SH,003C
AOK
SY,FFF4
AOK
R,1
Reboot!
Exiting config mode ...
5. output of command 'X' after cofiguration
Ver 6.15 04/26/2013
(c) Roving Networks
***Settings***
BTA=00066667BBE9
BTName=TmkBT-BBE9
Baudrt(SW4)=115K
Mode =DTR
Authen=1
PinCod=1234
Bonded=0
Rem=NONE SET
***ADVANCED Settings***
SrvName= Keyboard/Mouse
SrvClass=0000
DevClass=1F00
InqWindw=0100
PagWindw=0100
CfgTimer=255
StatuStr=NULL
HidFlags=3c
DTRtimer=8
KeySwapr=0
***OTHER Settings***
Profile= HID
CfgChar= $
SniffEna=8000
LowPower=0
TX Power=fff4
IOPorts= 0
IOValues=0
Sleeptmr=0
DebugMod=0
RoleSwch=0
Switch to USB mode
------------------
You can switch between USB and Bluetooth with pressing 'LShift+RShift+u'.
Pairing mode
------------
This disconnects current connect and enter pairing mode.
For deveropment
===============
RN-42 Serial Connection
-----------------------
UART: 115200bps, 8bit, 1-stopbit, non-parity, no flow control
SSP: 115200bps, 8bit, 1-stopbit, non-parity, no flow control(via Bluetooth)
To enter command mode disconnect the module from host and type '$$$'.(you will see 'CMD') and type '+' to get local echo. To exit type '---'(you will see 'END').
RN-42 Commands
--------------
S-,tmkBT // Device name
SS,keyboard/mouse // service name
SM,4 // Auto Connect DTR mode
SW,8010 // Sniff enable 0x10*0.625ms=10ms; 50ms is laggish and not much power save
S~,6 // HID profile
S~,0 // SPP profile
SH,003C // HID register
SY,0004 // Transmit power
SC,0000 // COD: 000005C0 (see HID spec/Bluegiga doc)
SD,05C0 // bit 12-8 7 6 5-0
// 00101 1 1 0
// peripheral pointing keybaord joystick, gamepad, ...
SM,6 // Pairing mode: auto connect
SM,4 // Master mode: Connection can be controled with GPIO6
SF,1 // Factroy reset
R,1 // reboot
SR,Z // removes all remote addresses for reconnecting.
// can be used to connect another host
SR,I // registers last inquiry address
Operation Modes
---------------
SM,3 Auto Connect Master mode
SM,4 Auto Connect DTR Mode uses GPIO6 to make and break connection(Mode =DTR)
confirm: auto connect works and control connection with GPIO6
SM,5 Auto Connect ANY Mode (Mode =ANY)
each time GPIO is set, make inquiry and connect to the first found device
SM,6 automatically reconnect(Mode =Pair)
confirm: auto connect works well but difficult to enter command mode.
HID flag register
-----------------
SH,0200
GH
10 0000 0000(0200) default
00 0011 1000(0038) Combo
|| | | |\_\____ number of paired devices to which the module can reconnect
|| | | \_______ send out reports over UART (0xFF <len> <data>)
|| \__\_________ descriptor type
|\______________ toggle virtual keyboard on iOS when first connected
\_______________ Force HID mode if GPIO11 is high on power-up
Descriptor type:
0000: keybaord
0001: Game Pad
0010: Mouse
0011: Combo
0100: Joystick
1xxx: reserved
Out report - Indicator
----------------------
0xFE 0x02 0x01 <LED_state>
Apple iOS
---------
Keyboard can be used with iPhone, but mouse cannot.
Android
-------
3.7.1.5 Note: To connect with Android phone the modules must wake up 11ms every 2.5seconds.
Power Management
----------------
Inquiry and Page window Idle or Active (3.1.1)
Downside: delay in discovery or connection time
SI, // set inquiry scan window(discovery) on/off duty?
SJ, // set page scan window(connection)
This reduces averaege power >20mA to 5mA(3mA in Sniff mode)
Sniff mode Transmit
Sniff mode is disabled by default and radio is active continuously when connected.(25-30mA)
In Sniff mode the radio wakes up intermittently and sleeps in very low power mode.(2mA)
SW,<val> // set interval timer(*0.625ms) 0000-7FFF
Deep sleep Idle (3.1.2)
In this mode the module shuts down completly and only draws about 300uA. To enable this set the most signifant bit(0x8000) of Sniff interaval timer.
SW,8320 // deep sleep enable(interval=0x320*0.625=500ms)
In normal sleep the firmware is still running in idle mode, and wakes up about 20 times per second to check ports, update LEDs, etc. During deep sleep, the firmware actually stops runnig some tasks and the LEDs only update about once per second.
To wake from deep sleep there are three ways: (in worst case wake up takes 5ms)
*send a charactor to the UART(first charactor will be lost)
*toggle CTS low to high and wait 5ms
*wake automatically every slot time(<val>*0.625ms)
Once the radio is awake it stay active for exactly 1 second of inactivity and then sleeps again.
Downside: latency and data loss
Disable Output driver Idle or Active (3.1.3)
S%,1000 // set all GPIO pins(0-11) to inputs.
Lower Transmit Power Idle or Active (3.1.4)
SY,<hex> // transmit power setting(takes effect after a power cycle and reboot)
Downside: reducing effective range
Optimizig for Latency
---------------------
By default the firmware is optimized for throughput.
SQ,16 // set latency bit
SQ,0 // unset latency bit
Configuration timer settings
----------------------------
Remote configuration is used for the module to be configured with various commands over Bluetooth(SPP profile only?).
The module has remote configuration timer to allow remote configuration over Bluetooth after power up in Slave mode. In Master modes the remote configuration timer is set to 0(no remote configuration). (In Trigger Master mode the timer is used as an idle timer to break the connection after time expires with no charactors receive.)
ST,0 // no remote, no local when connected
ST,<1-252> // local and remote with timeout in seconds from power up
ST,253 // local only without timeout
ST,254 // remote only without timeout
ST,255 // local and remote without timeout
Commands
--------
S7, 7bit mode
SA, Authenticaiton
SB, Send break
SC, Service class
SD, Device class
SM,<val> Operation mode
SP,<string> Pin code(alpahnumeric)
SQ,<mask> Special configuration(GPIO, discovery mode, low latency, reboot, UART)
SR,<hex> Store remote address
SR,Z Erase all address
SS,<string> Set service name(1-20)**
ST,<val> Remote configuration timer(Master:0, Slave:0-255, Triger:as idle timer)
SU,<val> UART baud rate
SW,<val> low-power sniff mode** deep sleep and wake up every 625us * <val>
SX,<0|1> bonding enable only acceps device that matches the stored address
SY,<hex> power setting**
SZ,<val> non-standard raw baud rate <val>=baud*0.004096
S~,<val> Profile 0:SPP, 5:APL, 6:HID
S-,<string> Device name -15 alphanumeric charactors
S?,<0|1> role switch enable
S$,<char> command mode char
$|,<hex> low-power connect mode deep sleep/active(discoverable and connectable) cycle
D display basic setting
E display extended setting
GB display the device's Bluetooth address
GF display Bluetooth address of connected device
GK show connection status
GR show remote address for reconnecting
G& show GPIO pin
G<char> show stored setting
+ toggle local echo on/off
& show GPIO 3,4,6,7(DIP switch)
C connect to stored remote address
C,<address> connect last address
CFI connect and go into fast data mode
CFR connect and go into fast data mode
CT,<address>,<val> connect to the address and disconnect after val?
F,1 fast data mod:
H display help
I,<time>,<cod> inquiry scan with <cod>
IN,<time>,<cod> inquiry scan with <cod>, return without BT name
IR inquiry scan with 0055AA
IS inquiry scan with 001F00
J hide pin code
K, kill disconnects current connection
L link quality
M show modem signlal status
O display other settings
P,<char> pass through?
Q quiet mode make the module not discoverable
Q,0 discoverable and connectable
Q,1 not discoverable and not connectable
Q,2 not discoverable and connectable
Q,? display current quiet mode
R,1 reboot
T,<0|1> pass received data while in command mode
U,<baud>,<parity> change UART setting tentatively
V display firmware version
W wake from quiet mode enable discovery and connection
Z deep sleep mode(<2mA)
Reset to Factory Default
------------------------
SF,1
R,1

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#include <avr/io.h>
#include <util/delay.h>
#include "battery.h"
/*
* Battery
*/
void battery_init(void)
{
// blink
battery_led(LED_ON); _delay_ms(100);
battery_led(LED_OFF); _delay_ms(100);
battery_led(LED_ON); _delay_ms(100);
battery_led(LED_OFF); _delay_ms(100);
// LED indicates charger status
battery_led(LED_CHARGER);
// ADC setting for voltage monitor
// Ref:2.56V band-gap, Input:ADC0(PF0), Prescale:128(16MHz/128=125KHz)
ADMUX = (1<<REFS1) | (1<<REFS0);
ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
// digital input buffer disable(24.9.5)
DIDR0 = (1<<ADC0D) | (1<<ADC4D) | (1<<ADC7D);
DIDR1 = (1<<AIN0D);
DIDR2 = (1<<ADC8D) | (1<<ADC9D) | (1<<ADC11D) | (1<<ADC12D) | (1<<ADC13D);
// ADC disable voltate divider(PF4)
DDRF |= (1<<4);
PORTF &= ~(1<<4);
}
// Indicator for battery
void battery_led(battery_led_t val)
{
if (val == LED_TOGGLE) {
// Toggle LED
DDRF |= (1<<5);
PINF |= (1<<5);
} else if (val == LED_ON) {
// On overriding charger status
DDRF |= (1<<5);
PORTF &= ~(1<<5);
} else if (val == LED_OFF) {
// Off overriding charger status
DDRF |= (1<<5);
PORTF |= (1<<5);
} else {
// Display charger status
DDRF &= ~(1<<5);
PORTF &= ~(1<<5);
}
}
bool battery_charging(void)
{
if (!(USBSTA&(1<<VBUS))) return false;
// Charger Status:
// MCP73831 MCP73832 LTC4054 Status
// Hi-Z Hi-Z Hi-Z Shutdown/No Battery
// Low Low Low Charging
// Hi Hi-Z Hi-Z Charged
// preserve last register status
uint8_t ddrf_prev = DDRF;
uint8_t portf_prev = PORTF;
// Input with pullup
DDRF &= ~(1<<5);
PORTF |= (1<<5);
_delay_ms(1);
bool charging = PINF&(1<<5) ? false : true;
// restore last register status
DDRF = (DDRF&~(1<<5)) | (ddrf_prev&(1<<5));
PORTF = (PORTF&~(1<<5)) | (portf_prev&(1<<5));
// TODO: With MCP73831 this can not get stable status when charging.
// LED is powered from PSEL line(USB or Lipo)
// due to weak low output of STAT pin?
// due to pull-up'd via resitor and LED?
return charging;
}
// Returns voltage in mV
uint16_t battery_voltage(void)
{
// ADC disable voltate divider(PF4)
DDRF |= (1<<4);
PORTF |= (1<<4);
volatile uint16_t bat;
ADCSRA |= (1<<ADEN);
_delay_ms(1); // wait for charging S/H capacitance
ADCSRA |= (1<<ADSC);
while (ADCSRA & (1<<ADSC)) ;
bat = ADC;
ADCSRA &= ~(1<<ADEN);
// ADC disable voltate divider(PF4)
DDRF |= (1<<4);
PORTF &= ~(1<<4);
return (bat - BATTERY_ADC_OFFSET) * BATTERY_ADC_RESOLUTION;
}
static bool low_voltage(void) {
static bool low = false;
uint16_t v = battery_voltage();
if (v < BATTERY_VOLTAGE_LOW_LIMIT) {
low = true;
} else if (v > BATTERY_VOLTAGE_LOW_RECOVERY) {
low = false;
}
return low;
}
battery_status_t battery_status(void)
{
if (USBSTA&(1<<VBUS)) {
/* powered */
return battery_charging() ? CHARGING : FULL_CHARGED;
} else {
/* not powered */
return low_voltage() ? LOW_VOLTAGE : DISCHARGING;
}
}

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#ifndef POWER_H
#define POWER_H
#include <stdint.h>
#include <stdbool.h>
typedef enum {
FULL_CHARGED,
CHARGING,
DISCHARGING,
LOW_VOLTAGE,
UNKNOWN,
} battery_status_t;
typedef enum {
LED_CHARGER = 0,
LED_ON,
LED_OFF,
LED_TOGGLE,
} battery_led_t;
/* Battery API */
void battery_init(void);
void battery_led(battery_led_t val);
bool battery_charging(void);
uint16_t battery_voltage(void);
battery_status_t battery_status(void);
#define BATTERY_VOLTAGE_LOW_LIMIT 3500
#define BATTERY_VOLTAGE_LOW_RECOVERY 3700
// ADC offset:16, resolution:5mV
#define BATTERY_ADC_OFFSET 16
#define BATTERY_ADC_RESOLUTION 5
#endif

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keyboards/hhkb/rn42/main.c
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#include <avr/io.h>
#include <avr/power.h>
#include <avr/wdt.h>
#include "lufa.h"
#include "print.h"
#include "sendchar.h"
#include "rn42.h"
#include "rn42_task.h"
#include "serial.h"
#include "keyboard.h"
#include "keycode.h"
#include "action.h"
#include "action_util.h"
#include "wait.h"
#include "suart.h"
#include "suspend.h"
#include "matrix.h"
static int8_t sendchar_func(uint8_t c)
{
xmit(c); // SUART
sendchar(c); // LUFA
return 0;
}
static void SetupHardware(void)
{
/* Disable watchdog if enabled by bootloader/fuses */
MCUSR &= ~(1 << WDRF);
wdt_disable();
/* Disable clock division */
clock_prescale_set(clock_div_1);
// Leonardo needs. Without this USB device is not recognized.
USB_Disable();
USB_Init();
// for Console_Task
USB_Device_EnableSOFEvents();
print_set_sendchar(sendchar_func);
// SUART PD0:output, PD1:input
DDRD |= (1<<0);
PORTD |= (1<<0);
DDRD &= ~(1<<1);
PORTD |= (1<<1);
}
int main(void) __attribute__ ((weak));
int main(void)
{
SetupHardware();
sei();
/* wait for USB startup to get ready for debug output */
uint8_t timeout = 255; // timeout when USB is not available(Bluetooth)
while (timeout-- && USB_DeviceState != DEVICE_STATE_Configured) {
wait_ms(4);
#if defined(INTERRUPT_CONTROL_ENDPOINT)
;
#else
USB_USBTask();
#endif
}
print("\nUSB init\n");
rn42_init();
rn42_task_init();
print("RN-42 init\n");
/* init modules */
keyboard_init();
#ifdef SLEEP_LED_ENABLE
sleep_led_init();
#endif
print("Keyboard start\n");
while (1) {
while (rn42_rts() && // RN42 is off
USB_DeviceState == DEVICE_STATE_Suspended) {
print("[s]");
matrix_power_down();
suspend_power_down();
suspend_power_down();
suspend_power_down();
suspend_power_down();
suspend_power_down();
suspend_power_down();
suspend_power_down();
if (USB_Device_RemoteWakeupEnabled && suspend_wakeup_condition()) {
USB_Device_SendRemoteWakeup();
}
}
keyboard_task();
#if !defined(INTERRUPT_CONTROL_ENDPOINT)
USB_USBTask();
#endif
rn42_task();
}
}

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#include <avr/io.h>
#include "host.h"
#include "host_driver.h"
#include "serial.h"
#include "rn42.h"
#include "print.h"
#include "timer.h"
#include "wait.h"
/* Host driver */
static uint8_t keyboard_leds(void);
static void send_keyboard(report_keyboard_t *report);
static void send_mouse(report_mouse_t *report);
static void send_system(uint16_t data);
static void send_consumer(uint16_t data);
host_driver_t rn42_driver = {
keyboard_leds,
send_keyboard,
send_mouse,
send_system,
send_consumer
};
void rn42_init(void)
{
// JTAG disable for PORT F. write JTD bit twice within four cycles.
MCUCR |= (1<<JTD);
MCUCR |= (1<<JTD);
// PF7: BT connection control(high: connect, low: disconnect)
rn42_autoconnect();
// PF6: linked(input without pull-up)
DDRF &= ~(1<<6);
PORTF |= (1<<6);
// PF1: RTS(low: allowed to send, high: not allowed)
DDRF &= ~(1<<1);
PORTF &= ~(1<<1);
// PD5: CTS(low: allow to send, high:not allow)
DDRD |= (1<<5);
PORTD &= ~(1<<5);
serial_init();
}
int16_t rn42_getc(void)
{
return serial_recv2();
}
const char *rn42_gets(uint16_t timeout)
{
static char s[24];
uint16_t t = timer_read();
uint8_t i = 0;
int16_t c;
while (i < 23 && timer_elapsed(t) < timeout) {
if ((c = rn42_getc()) != -1) {
if ((char)c == '\r') continue;
if ((char)c == '\n') break;
s[i++] = c;
}
}
s[i] = '\0';
return s;
}
void rn42_putc(uint8_t c)
{
serial_send(c);
}
void rn42_puts(char *s)
{
while (*s)
serial_send(*s++);
}
bool rn42_autoconnecting(void)
{
// GPIO6 for control connection(high: auto connect, low: disconnect)
// Note that this needs config: SM,4(Auto-Connect DTR Mode)
return (PORTF & (1<<7) ? true : false);
}
void rn42_autoconnect(void)
{
// hi to auto connect
DDRF |= (1<<7);
PORTF |= (1<<7);
}
void rn42_disconnect(void)
{
// low to disconnect
DDRF |= (1<<7);
PORTF &= ~(1<<7);
}
bool rn42_rts(void)
{
// low when RN-42 is powered and ready to receive
return PINF&(1<<1);
}
void rn42_cts_hi(void)
{
// not allow to send
PORTD |= (1<<5);
}
void rn42_cts_lo(void)
{
// allow to send
PORTD &= ~(1<<5);
}
bool rn42_linked(void)
{
// RN-42 GPIO2
// Hi-Z: Not powered
// High: Linked
// Low: Connecting
return PINF&(1<<6);
}
static uint8_t leds = 0;
static uint8_t keyboard_leds(void) { return leds; }
void rn42_set_leds(uint8_t l) { leds = l; }
void rn42_send_str(const char *str)
{
uint8_t c;
while ((c = pgm_read_byte(str++)))
rn42_putc(c);
}
const char *rn42_send_command(const char *cmd)
{
static const char *s;
rn42_send_str(cmd);
wait_ms(500);
s = rn42_gets(100);
xprintf("%s\r\n", s);
rn42_print_response();
return s;
}
void rn42_print_response(void)
{
int16_t c;
while ((c = rn42_getc()) != -1) {
xprintf("%c", c);
}
}
static void send_keyboard(report_keyboard_t *report)
{
// wake from deep sleep
/*
PORTD |= (1<<5); // high
wait_ms(5);
PORTD &= ~(1<<5); // low
*/
serial_send(0xFD); // Raw report mode
serial_send(9); // length
serial_send(1); // descriptor type
serial_send(report->mods);
serial_send(0x00);
serial_send(report->keys[0]);
serial_send(report->keys[1]);
serial_send(report->keys[2]);
serial_send(report->keys[3]);
serial_send(report->keys[4]);
serial_send(report->keys[5]);
}
static void send_mouse(report_mouse_t *report)
{
// wake from deep sleep
/*
PORTD |= (1<<5); // high
wait_ms(5);
PORTD &= ~(1<<5); // low
*/
serial_send(0xFD); // Raw report mode
serial_send(5); // length
serial_send(2); // descriptor type
serial_send(report->buttons);
serial_send(report->x);
serial_send(report->y);
serial_send(report->v);
}
static void send_system(uint16_t data)
{
// Table 5-6 of RN-BT-DATA-UB
// 81,82,83 scan codes can be used?
}
static uint16_t usage2bits(uint16_t usage)
{
switch (usage) {
case AC_HOME: return 0x01;
case AL_EMAIL: return 0x02;
case AC_SEARCH: return 0x04;
//case AL_KBD_LAYOUT: return 0x08; // Apple virtual keybaord toggle
case AUDIO_VOL_UP: return 0x10;
case AUDIO_VOL_DOWN: return 0x20;
case AUDIO_MUTE: return 0x40;
case TRANSPORT_PLAY_PAUSE: return 0x80;
case TRANSPORT_NEXT_TRACK: return 0x100;
case TRANSPORT_PREV_TRACK: return 0x200;
case TRANSPORT_STOP: return 0x400;
case TRANSPORT_STOP_EJECT: return 0x800;
case TRANSPORT_FAST_FORWARD: return 0x1000;
case TRANSPORT_REWIND: return 0x2000;
//case return 0x4000; // Stop/eject
//case return 0x8000; // Internet browser
};
return 0;
}
static void send_consumer(uint16_t data)
{
uint16_t bits = usage2bits(data);
serial_send(0xFD); // Raw report mode
serial_send(3); // length
serial_send(3); // descriptor type
serial_send(bits&0xFF);
serial_send((bits>>8)&0xFF);
}
/* Null driver for config_mode */
static uint8_t config_keyboard_leds(void);
static void config_send_keyboard(report_keyboard_t *report);
static void config_send_mouse(report_mouse_t *report);
static void config_send_system(uint16_t data);
static void config_send_consumer(uint16_t data);
host_driver_t rn42_config_driver = {
config_keyboard_leds,
config_send_keyboard,
config_send_mouse,
config_send_system,
config_send_consumer
};
static uint8_t config_keyboard_leds(void) { return leds; }
static void config_send_keyboard(report_keyboard_t *report) {}
static void config_send_mouse(report_mouse_t *report) {}
static void config_send_system(uint16_t data) {}
static void config_send_consumer(uint16_t data) {}

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#ifndef RN42_H
#define RN42_H
#include <stdbool.h>
#include "host_driver.h"
host_driver_t rn42_driver;
host_driver_t rn42_config_driver;
void rn42_init(void);
int16_t rn42_getc(void);
const char *rn42_gets(uint16_t timeout);
void rn42_putc(uint8_t c);
void rn42_puts(char *s);
bool rn42_autoconnecting(void);
void rn42_autoconnect(void);
void rn42_disconnect(void);
bool rn42_rts(void);
void rn42_cts_hi(void);
void rn42_cts_lo(void);
bool rn42_linked(void);
void rn42_set_leds(uint8_t l);
const char *rn42_send_command(const char *cmd);
void rn42_send_str(const char *str);
void rn42_print_response(void);
#define SEND_STR(str) rn42_send_str(PSTR(str))
#define SEND_COMMAND(cmd) rn42_send_command(PSTR(cmd))
#endif

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keyboards/hhkb/rn42/rn42_task.c
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#include <stdint.h>
#include <string.h>
#include <avr/pgmspace.h>
#include <avr/eeprom.h>
#include "keycode.h"
#include "serial.h"
#include "host.h"
#include "action.h"
#include "action_util.h"
#include "lufa.h"
#include "rn42_task.h"
#include "print.h"
#include "debug.h"
#include "timer.h"
#include "wait.h"
#include "command.h"
#include "battery.h"
#include "keycode_config.h"
extern keymap_config_t keymap_config;
static bool config_mode = false;
static bool force_usb = false;
static void status_led(bool on)
{
if (on) {
DDRE |= (1<<6);
PORTE &= ~(1<<6);
} else {
DDRE |= (1<<6);
PORTE |= (1<<6);
}
}
void rn42_task_init(void)
{
battery_init();
#ifdef NKRO_ENABLE
rn42_nkro_last = keymap_config.nkro;
#endif
}
void rn42_task(void)
{
int16_t c;
// Raw mode: interpret output report of LED state
while ((c = rn42_getc()) != -1) {
// LED Out report: 0xFE, 0x02, 0x01, <leds>
// To get the report over UART set bit3 with SH, command.
static enum {LED_INIT, LED_FE, LED_02, LED_01} state = LED_INIT;
switch (state) {
case LED_INIT:
if (c == 0xFE) state = LED_FE;
else {
if (0x0 <= c && c <= 0x7f) xprintf("%c", c);
else xprintf(" %02X", c);
}
break;
case LED_FE:
if (c == 0x02) state = LED_02;
else state = LED_INIT;
break;
case LED_02:
if (c == 0x01) state = LED_01;
else state = LED_INIT;
break;
case LED_01:
dprintf("LED status: %02X\n", c);
rn42_set_leds(c);
state = LED_INIT;
break;
default:
state = LED_INIT;
}
}
/* Switch between USB and Bluetooth */
if (!config_mode) { // not switch while config mode
if (!force_usb && !rn42_rts()) {
if (host_get_driver() != &rn42_driver) {
clear_keyboard();
#ifdef NKRO_ENABLE
rn42_nkro_last = keymap_config.nkro;
keymap_config.nkro = false;
#endif
host_set_driver(&rn42_driver);
}
} else {
if (host_get_driver() != &lufa_driver) {
clear_keyboard();
#ifdef NKRO_ENABLE
keymap_config.nkro = rn42_nkro_last;
#endif
host_set_driver(&lufa_driver);
}
}
}
static uint16_t prev_timer = 0;
uint16_t e = timer_elapsed(prev_timer);
if (e > 1000) {
/* every second */
prev_timer += e/1000*1000;
/* Low voltage alert */
uint8_t bs = battery_status();
if (bs == LOW_VOLTAGE) {
battery_led(LED_ON);
} else {
battery_led(LED_CHARGER);
}
/* every minute */
uint32_t t = timer_read32()/1000;
if (t%60 == 0) {
uint16_t v = battery_voltage();
uint8_t h = t/3600;
uint8_t m = t%3600/60;
uint8_t s = t%60;
dprintf("%02u:%02u:%02u\t%umV\n", h, m, s, v);
/* TODO: xprintf doesn't work for this.
xprintf("%02u:%02u:%02u\t%umV\n", (t/3600), (t%3600/60), (t%60), v);
*/
}
}
/* Connection monitor */
if (!rn42_rts() && rn42_linked()) {
status_led(true);
} else {
status_led(false);
}
}
/******************************************************************************
* Command
******************************************************************************/
static host_driver_t *prev_driver = &rn42_driver;
static void enter_command_mode(void)
{
prev_driver = host_get_driver();
clear_keyboard();
host_set_driver(&rn42_config_driver); // null driver; not to send a key to host
rn42_disconnect();
while (rn42_linked()) ;
print("Entering config mode ...\n");
wait_ms(1100); // need 1 sec
SEND_COMMAND("$$$");
wait_ms(600); // need 1 sec
rn42_print_response();
const char *s = SEND_COMMAND("v\r\n");
if (strncmp("v", s, 1) != 0) SEND_COMMAND("+\r\n"); // local echo on
}
static void exit_command_mode(void)
{
print("Exiting config mode ...\n");
SEND_COMMAND("---\r\n"); // exit
rn42_autoconnect();
clear_keyboard();
host_set_driver(prev_driver);
}
static void init_rn42(void)
{
// RN-42 configure
if (!config_mode) enter_command_mode();
SEND_COMMAND("SF,1\r\n"); // factory defaults
SEND_COMMAND("S-,TmkBT\r\n");
SEND_COMMAND("SS,Keyboard/Mouse\r\n");
SEND_COMMAND("SM,4\r\n"); // auto connect(DTR)
SEND_COMMAND("SW,8000\r\n"); // Sniff disable
SEND_COMMAND("S~,6\r\n"); // HID profile
SEND_COMMAND("SH,003C\r\n"); // combo device, out-report, 4-reconnect
SEND_COMMAND("SY,FFF4\r\n"); // transmit power -12
SEND_COMMAND("R,1\r\n");
if (!config_mode) exit_command_mode();
}
#if 0
// Switching connections
// NOTE: Remote Address doesn't work in the way manual says.
// EEPROM address for link store
#define RN42_LINK0 (uint8_t *)128
#define RN42_LINK1 (uint8_t *)140
#define RN42_LINK2 (uint8_t *)152
#define RN42_LINK3 (uint8_t *)164
static void store_link(uint8_t *eeaddr)
{
enter_command_mode();
SEND_STR("GR\r\n"); // remote address
const char *s = rn42_gets(500);
if (strcmp("GR", s) == 0) s = rn42_gets(500); // ignore local echo
xprintf("%s(%d)\r\n", s, strlen(s));
if (strlen(s) == 12) {
for (int i = 0; i < 12; i++) {
eeprom_write_byte(eeaddr+i, *(s+i));
dprintf("%c ", *(s+i));
}
dprint("\r\n");
}
exit_command_mode();
}
static void restore_link(const uint8_t *eeaddr)
{
enter_command_mode();
SEND_COMMAND("SR,Z\r\n"); // remove remote address
SEND_STR("SR,"); // set remote address from EEPROM
for (int i = 0; i < 12; i++) {
uint8_t c = eeprom_read_byte(eeaddr+i);
rn42_putc(c);
dprintf("%c ", c);
}
dprintf("\r\n");
SEND_COMMAND("\r\n");
SEND_COMMAND("R,1\r\n"); // reboot
exit_command_mode();
}
static const char *get_link(uint8_t * eeaddr)
{
static char s[13];
for (int i = 0; i < 12; i++) {
uint8_t c = eeprom_read_byte(eeaddr+i);
s[i] = c;
}
s[12] = '\0';
return s;
}
#endif
static void pairing(void)
{
enter_command_mode();
SEND_COMMAND("SR,Z\r\n"); // remove remote address
SEND_COMMAND("R,1\r\n"); // reboot
exit_command_mode();
}
bool command_extra(uint8_t code)
{
uint32_t t;
uint16_t b;
switch (code) {
case KC_H:
case KC_SLASH: /* ? */
print("\n\n----- Bluetooth RN-42 Help -----\n");
print("i: RN-42 info\n");
print("b: battery voltage\n");
print("Del: enter/exit RN-42 config mode\n");
print("Slck: RN-42 initialize\n");
#if 0
print("1-4: restore link\n");
print("F1-F4: store link\n");
#endif
print("p: pairing\n");
if (config_mode) {
return true;
} else {
print("u: toggle Force USB mode\n");
return false; // to display default command help
}
case KC_P:
pairing();
return true;
#if 0
/* Store link address to EEPROM */
case KC_F1:
store_link(RN42_LINK0);
return true;
case KC_F2:
store_link(RN42_LINK1);
return true;
case KC_F3:
store_link(RN42_LINK2);
return true;
case KC_F4:
store_link(RN42_LINK3);
return true;
/* Restore link address to EEPROM */
case KC_1:
restore_link(RN42_LINK0);
return true;
case KC_2:
restore_link(RN42_LINK1);
return true;
case KC_3:
restore_link(RN42_LINK2);
return true;
case KC_4:
restore_link(RN42_LINK3);
return true;
#endif
case KC_I:
print("\n----- RN-42 info -----\n");
xprintf("protocol: %s\n", (host_get_driver() == &rn42_driver) ? "RN-42" : "LUFA");
xprintf("force_usb: %X\n", force_usb);
xprintf("rn42: %s\n", rn42_rts() ? "OFF" : (rn42_linked() ? "CONN" : "ON"));
xprintf("rn42_autoconnecting(): %X\n", rn42_autoconnecting());
xprintf("config_mode: %X\n", config_mode);
xprintf("USB State: %s\n",
(USB_DeviceState == DEVICE_STATE_Unattached) ? "Unattached" :
(USB_DeviceState == DEVICE_STATE_Powered) ? "Powered" :
(USB_DeviceState == DEVICE_STATE_Default) ? "Default" :
(USB_DeviceState == DEVICE_STATE_Addressed) ? "Addressed" :
(USB_DeviceState == DEVICE_STATE_Configured) ? "Configured" :
(USB_DeviceState == DEVICE_STATE_Suspended) ? "Suspended" : "?");
xprintf("battery: ");
switch (battery_status()) {
case FULL_CHARGED: xprintf("FULL"); break;
case CHARGING: xprintf("CHARG"); break;
case DISCHARGING: xprintf("DISCHG"); break;
case LOW_VOLTAGE: xprintf("LOW"); break;
default: xprintf("?"); break;
};
xprintf("\n");
xprintf("RemoteWakeupEnabled: %X\n", USB_Device_RemoteWakeupEnabled);
xprintf("VBUS: %X\n", USBSTA&(1<<VBUS));
t = timer_read32()/1000;
uint8_t d = t/3600/24;
uint8_t h = t/3600;
uint8_t m = t%3600/60;
uint8_t s = t%60;
xprintf("uptime: %02u %02u:%02u:%02u\n", d, h, m, s);
#if 0
xprintf("LINK0: %s\r\n", get_link(RN42_LINK0));
xprintf("LINK1: %s\r\n", get_link(RN42_LINK1));
xprintf("LINK2: %s\r\n", get_link(RN42_LINK2));
xprintf("LINK3: %s\r\n", get_link(RN42_LINK3));
#endif
return true;
case KC_B:
// battery monitor
t = timer_read32()/1000;
b = battery_voltage();
xprintf("BAT: %umV\t", b);
xprintf("%02u:", t/3600);
xprintf("%02u:", t%3600/60);
xprintf("%02u\n", t%60);
return true;
case KC_U:
if (config_mode) return false;
if (force_usb) {
print("Auto mode\n");
force_usb = false;
} else {
print("USB mode\n");
force_usb = true;
}
return true;
case KC_DELETE:
/* RN-42 Command mode */
if (rn42_autoconnecting()) {
enter_command_mode();
command_state = CONSOLE;
config_mode = true;
} else {
exit_command_mode();
command_state = ONESHOT;
config_mode = false;
}
return true;
case KC_SCROLLLOCK:
init_rn42();
return true;
#ifdef NKRO_ENABLE
case KC_N:
if (host_get_driver() != &lufa_driver) {
// ignored unless USB mode
return true;
}
return false;
#endif
default:
if (config_mode)
return true;
else
return false; // yield to default command
}
return true;
}
/*
* RN-42 Command mode
* sends charactors to the module
*/
static uint8_t code2asc(uint8_t code);
bool command_console_extra(uint8_t code)
{
rn42_putc(code2asc(code));
return true;
}
// convert keycode into ascii charactor
static uint8_t code2asc(uint8_t code)
{
bool shifted = (get_mods() & (MOD_BIT(KC_LSHIFT)|MOD_BIT(KC_RSHIFT))) ? true : false;
switch (code) {
case KC_A: return (shifted ? 'A' : 'a');
case KC_B: return (shifted ? 'B' : 'b');
case KC_C: return (shifted ? 'C' : 'c');
case KC_D: return (shifted ? 'D' : 'd');
case KC_E: return (shifted ? 'E' : 'e');
case KC_F: return (shifted ? 'F' : 'f');
case KC_G: return (shifted ? 'G' : 'g');
case KC_H: return (shifted ? 'H' : 'h');
case KC_I: return (shifted ? 'I' : 'i');
case KC_J: return (shifted ? 'J' : 'j');
case KC_K: return (shifted ? 'K' : 'k');
case KC_L: return (shifted ? 'L' : 'l');
case KC_M: return (shifted ? 'M' : 'm');
case KC_N: return (shifted ? 'N' : 'n');
case KC_O: return (shifted ? 'O' : 'o');
case KC_P: return (shifted ? 'P' : 'p');
case KC_Q: return (shifted ? 'Q' : 'q');
case KC_R: return (shifted ? 'R' : 'r');
case KC_S: return (shifted ? 'S' : 's');
case KC_T: return (shifted ? 'T' : 't');
case KC_U: return (shifted ? 'U' : 'u');
case KC_V: return (shifted ? 'V' : 'v');
case KC_W: return (shifted ? 'W' : 'w');
case KC_X: return (shifted ? 'X' : 'x');
case KC_Y: return (shifted ? 'Y' : 'y');
case KC_Z: return (shifted ? 'Z' : 'z');
case KC_1: return (shifted ? '!' : '1');
case KC_2: return (shifted ? '@' : '2');
case KC_3: return (shifted ? '#' : '3');
case KC_4: return (shifted ? '$' : '4');
case KC_5: return (shifted ? '%' : '5');
case KC_6: return (shifted ? '^' : '6');
case KC_7: return (shifted ? '&' : '7');
case KC_8: return (shifted ? '*' : '8');
case KC_9: return (shifted ? '(' : '9');
case KC_0: return (shifted ? ')' : '0');
case KC_ENTER: return '\n';
case KC_ESCAPE: return 0x1B;
case KC_BSPACE: return '\b';
case KC_TAB: return '\t';
case KC_SPACE: return ' ';
case KC_MINUS: return (shifted ? '_' : '-');
case KC_EQUAL: return (shifted ? '+' : '=');
case KC_LBRACKET: return (shifted ? '{' : '[');
case KC_RBRACKET: return (shifted ? '}' : ']');
case KC_BSLASH: return (shifted ? '|' : '\\');
case KC_NONUS_HASH: return (shifted ? '|' : '\\');
case KC_SCOLON: return (shifted ? ':' : ';');
case KC_QUOTE: return (shifted ? '"' : '\'');
case KC_GRAVE: return (shifted ? '~' : '`');
case KC_COMMA: return (shifted ? '<' : ',');
case KC_DOT: return (shifted ? '>' : '.');
case KC_SLASH: return (shifted ? '?' : '/');
case KC_DELETE: return '\0'; // Delete to disconnect
default: return ' ';
}
}

14
keyboards/hhkb/rn42/rn42_task.h
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@ -0,0 +1,14 @@
#ifndef RN42_TASK_H
#define RN42_TASK_H
#include <stdbool.h>
#include "rn42.h"
#ifdef NKRO_ENABLE
bool rn42_nkro_last;
#endif
void rn42_task_init(void);
void rn42_task(void);
#endif

156
keyboards/hhkb/rn42/suart.S
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@ -0,0 +1,156 @@
;---------------------------------------------------------------------------;
; Software implemented UART module ;
; (C)ChaN, 2005 (http://elm-chan.org/) ;
;---------------------------------------------------------------------------;
; Bit rate settings:
;
; 1MHz 2MHz 4MHz 6MHz 8MHz 10MHz 12MHz 16MHz 20MHz
; 2.4kbps 138 - - - - - - - -
; 4.8kbps 68 138 - - - - - - -
; 9.6kbps 33 68 138 208 - - - - -
; 19.2kbps - 33 68 102 138 173 208 - -
; 38.4kbps - - 33 50 68 85 102 138 172
; 57.6kbps - - 21 33 44 56 68 91 114
; 115.2kbps - - - - 21 27 33 44 56
.nolist
#include <avr/io.h>
.list
#define BPS 44 /* Bit delay. (see above table) */
#define BIDIR 0 /* 0:Separated Tx/Rx, 1:Shared Tx/Rx */
#define OUT_1 sbi _SFR_IO_ADDR(SUART_OUT_PORT), SUART_OUT_BIT /* Output 1 */
#define OUT_0 cbi _SFR_IO_ADDR(SUART_OUT_PORT), SUART_OUT_BIT /* Output 0 */
#define SKIP_IN_1 sbis _SFR_IO_ADDR(SUART_IN_PIN), SUART_IN_BIT /* Skip if 1 */
#define SKIP_IN_0 sbic _SFR_IO_ADDR(SUART_IN_PIN), SUART_IN_BIT /* Skip if 0 */
#ifdef SPM_PAGESIZE
.macro _LPMI reg
lpm \reg, Z+
.endm
.macro _MOVW dh,dl, sh,sl
movw \dl, \sl
.endm
#else
.macro _LPMI reg
lpm
mov \reg, r0
adiw ZL, 1
.endm
.macro _MOVW dh,dl, sh,sl
mov \dl, \sl
mov \dh, \sh
.endm
#endif
;---------------------------------------------------------------------------;
; Transmit a byte in serial format of N81
;
;Prototype: void xmit (uint8_t data);
;Size: 16 words
.global xmit
.func xmit
xmit:
#if BIDIR
ldi r23, BPS-1 ;Pre-idle time for bidirectional data line
5: dec r23 ;
brne 5b ;/
#endif
in r0, _SFR_IO_ADDR(SREG) ;Save flags
com r24 ;C = start bit
ldi r25, 10 ;Bit counter
cli ;Start critical section
1: ldi r23, BPS-1 ;----- Bit transferring loop
2: dec r23 ;Wait for a bit time
brne 2b ;/
brcs 3f ;MISO = bit to be sent
OUT_1 ;
3: brcc 4f ;
OUT_0 ;/
4: lsr r24 ;Get next bit into C
dec r25 ;All bits sent?
brne 1b ; no, coutinue
out _SFR_IO_ADDR(SREG), r0 ;End of critical section
ret
.endfunc
;---------------------------------------------------------------------------;
; Receive a byte
;
;Prototype: uint8_t rcvr (void);
;Size: 19 words
.global rcvr
.func rcvr
rcvr:
in r0, _SFR_IO_ADDR(SREG) ;Save flags
ldi r24, 0x80 ;Receiving shift reg
cli ;Start critical section
1: SKIP_IN_1 ;Wait for idle
rjmp 1b
2: SKIP_IN_0 ;Wait for start bit
rjmp 2b
ldi r25, BPS/2 ;Wait for half bit time
3: dec r25
brne 3b
4: ldi r25, BPS ;----- Bit receiving loop
5: dec r25 ;Wait for a bit time
brne 5b ;/
lsr r24 ;Next bit
SKIP_IN_0 ;Get a data bit into r24.7
ori r24, 0x80
brcc 4b ;All bits received? no, continue
out _SFR_IO_ADDR(SREG), r0 ;End of critical section
ret
.endfunc
; Not wait for start bit. This should be called after detecting start bit.
.global recv
.func recv
recv:
in r0, _SFR_IO_ADDR(SREG) ;Save flags
ldi r24, 0x80 ;Receiving shift reg
cli ;Start critical section
;1: SKIP_IN_1 ;Wait for idle
; rjmp 1b
;2: SKIP_IN_0 ;Wait for start bit
; rjmp 2b
ldi r25, BPS/2 ;Wait for half bit time
3: dec r25
brne 3b
4: ldi r25, BPS ;----- Bit receiving loop
5: dec r25 ;Wait for a bit time
brne 5b ;/
lsr r24 ;Next bit
SKIP_IN_0 ;Get a data bit into r24.7
ori r24, 0x80
brcc 4b ;All bits received? no, continue
ldi r25, BPS/2 ;Wait for half bit time
6: dec r25
brne 6b
7: SKIP_IN_1 ;Wait for stop bit
rjmp 7b
out _SFR_IO_ADDR(SREG), r0 ;End of critical section
ret
.endfunc

8
keyboards/hhkb/rn42/suart.h
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@ -0,0 +1,8 @@
#ifndef SUART
#define SUART
void xmit(uint8_t);
uint8_t rcvr(void);
uint8_t recv(void);
#endif /* SUART */

30
keyboards/hhkb/rules.mk
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@ -72,6 +72,36 @@ CUSTOM_MATRIX = yes # Custom matrix file for the HHKB
# UNICODE_ENABLE = yes # Unicode
# BLUETOOTH_ENABLE = yes # Enable Bluetooth with the Adafruit EZ-Key HID
# HHKB_RN42_ENABLE = yes # Enable support for hasu's BT alt controller -- code borrowed from tmk source tree.
# Either uncomment the HHKB_RN42_ENABLE line above, or run make enabling the
# feature. Be sure to clean any existing build before trying to enable rn42
# support. For example:
#
# make hhkb-keymap-clean
# make hhkb-keymap-dfu HHKB_RN42_ENABLE=yes
ifeq ($(strip $(HHKB_RN42_ENABLE)), yes)
OPT_DEFS += -DHHKB_RN42_ENABLE
# Support for the RN42 Bluetooth module. This is the BT module in Hasu's BT
# HHKB Alt controller.
RN42_DIR = rn42
SRC += serial_uart.c \
rn42/suart.S \
rn42/rn42.c \
rn42/rn42_task.c \
rn42/battery.c \
rn42/main.c
VPATH += $(RN42_DIR)
endif
# debug-on: EXTRAFLAGS += -DDEBUG -DDEBUG_ACTION
# debug-on: all

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