keyboard/hhkb_rn42/MEMO.txt

   1 Roving RN-42
   2 ============
   3 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.
   4         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.
   5 07/18   On Linux, had an USB related trouble; keyobard or console didn't work for some reason. Changing PID cured this problem. Very annoying, took very long time before resolved it.
   6
   7
   8
   9 TODO
  10 ----
  11 - LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
  12 - Factroy reset doesn't work; need to test again. 10K pull-up is too high?
  13 - Lipo voltage ADC sensing
  14 - Lipo charger configuration: fast charge time:  USB charger spec?
  15 - Low voltage alarm: LED indcates voltage of Lipo
  16 - CTS/RTS lines are needed? just connect in loop back if no flow control is needed.
  17 - CTS is needed for waking up from deep sleep?
  18 - Serial API callback  when data are available/received(and when send buffer is available)
  19 - Serial API instance  several serial ports can be used
  20 - DCDC converter: squeaky inducter with onsemi NCP1402
  21 - Lipo charger MCP73831: needs capacitor 4.7uF *2
  22 - Keymap layer bug: during space is pressed(mousekey) press Fn(HHKB) then release space before Fn, in result HHKB layer is locked(toggled) unintentionally.
  23
  24 DONE:
  25 - USB connection check - 07.01
  26 - BT on/off check: whether RX line is pulled up? - checking RTS 07.01
  27 - USB/BT switching  BT is on -> BT, BT is off -> USB - 07.01
  28 - Under voltage lock out UVLO for protection of Lipo - Lipo has discharge protection at 3.100V    07.01
  29 - Power saving: HHKB scan, BT radio control - 9h with 850mAh, this is enough   07.01
  30 - Power selector doesn't work; Q4 MOSFET leaks from Lipo to USB power line. -- use Schottky instead 07/04
  31
  32
  33 Lipo
  34 ----
  35 Sparkfun Polymer Lithium Ion Battery 850mAh:
  36 https://www.sparkfun.com/products/341
  37 Lipo Cell spec:
  38 https://www.sparkfun.com/datasheets/Batteries/063048%20Li-polymer.pdf
  39 Protection spec:
  40 http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/BatteryProtection.pdf
  41                             min     typical max
  42 over-charge                 4.255   4.280   4.305
  43 over-charge discover?       4.030   4.080   4.130
  44 over-discharge              2.827   2.900   2.973
  45 over-discharge discover     3.022   3.100   3.178
  46
  47 ADC voltage monitor:    voltage divider 10K+10K(0.5)
  48     ADC=V*0.5/2.56*1024
  49     V       ADC
  50     ------------------
  51     4.20    0x347(839)
  52     3.10    0x26b(619)
  53
  54
  55
  56
  57 Configuration
  58 -------------
  59 Ver 6.15 04/26/2013
  60 (c) Roving Networks
  61 ***Settings***
  62 BTA=0006664B3AE3
  63 BTName=tmkBT-3AE3
  64 Baudrt(SW4)=115K
  65 Mode  =DTR
  66 Authen=2
  67 Bonded=0
  68 Rem=000000000000
  69 ***ADVANCED Settings***
  70 SrvName= keyboard/mouse
  71 SrvClass=0000
  72 DevClass=0000
  73 InqWindw=0100
  74 PagWindw=0100
  75 CfgTimer=255
  76 StatuStr=NULL
  77 HidFlags=3c
  78 DTRtimer=8
  79 KeySwapr=0
  80 ***OTHER Settings***
  81 Profile= HID
  82 CfgChar= $
  83 SniffEna=8010
  84 LowPower=0
  85 TX Power=0
  86 IOPorts= 0
  87 IOValues=0
  88 Sleeptmr=0
  89 DebugMod=0
  90 RoleSwch=0
  91
  92
  93
  94 Serial connection
  95 -----------------
  96 Serial line:    115200bps, 8bit, 1-stopbit, non-parity, no flow control
  97 SSP:            115200bps, 8bit, 1-stopbit, non-parity, no flow control(via Bluetooth)
  98
  99 To enter command mode disconnect the module from host and type '$$$'.(you will see 'CMD')
 100 To exit type '---'(you will see 'END') and '+' to get local echo.
 101
 102
 103
 104 Setting command mode
 105 --------------------
 106 S-,tmkBT            // Device name
 107 SS,keyboard/mouse   // service name
 108 SM,4                // Auto Connect DTR mode
 109 SW,8010             // Sniff enable 0x10*0.625ms=10ms; 50ms is laggish and not much power save
 110 S~,6                // HID profile
 111 SH,003C             // HID register
 112 SY,0004             // Transmit power
 113
 114
 115
 116
 117 Other options:
 118 SC,0000         // COD: 000005C0    (see HID spec/Bluegiga doc)
 119 SD,05C0         //     bit 12-8         7           6           5-0
 120                 //         00101        1           1           0
 121                 //         peripheral   pointing    keybaord    joystick, gamepad, ...
 122 SM,6                // Pairing mode: auto connect
 123 SM,4                // Master mode: Connection can be controled with GPIO6
 124
 125
 126
 127
 128 HID profile
 129 -----------
 130 S~,6    HID profile
 131 S~,0    SPP profile
 132 R,1     reboot
 133
 134
 135 Apple iOS
 136 ---------
 137 Cannot supported without apple iAP authentication chip.
 138
 139
 140 HID flag register
 141 -----------------
 142 SH,0200
 143 GH
 144
 145 10 0000 0000(0200)  default
 146 00 0011 1000(0038)  Combo
 147 || |  | |\_\____ number of paired devices to which the module can reconnect
 148 || |  | \_______ send out reports over UART (0xFF <len> <data>)
 149 || \__\_________ descriptor type
 150 |\______________ toggle virtual keyboard on iOS when first connected
 151 \_______________ Force HID mode if GPIO11 is high on power-up
 152
 153     Descriptor type:
 154     0000:   keybaord
 155     0001:   Game Pad
 156     0010:   Mouse
 157     0011:   Combo
 158     0100:   Joystick
 159     1xxx:   reserved
 160
 161 Out report - Indicator
 162 ----------------------
 163 0xFE 0x02 0x01 <LED_state>
 164
 165
 166 LED Status
 167 ----------
 168 Configuring                     10 times per sec
 169 Startup/configuration timer     2 times per sec
 170 Discoverable/Inquiring/Idle     once per sec
 171 Connected                       solid on
 172
 173
 174 Pairing
 175 -------
 176 First, host initiates pairing process and once it is done, auto connect will work thereafter.
 177 SM,3        Master mode
 178 SM,4        Auto Connect DTR Mode uses GPIO6 to make and break connection(Mode =DTR)
 179                 confirm: auto connect works and control connection with GPIO6
 180 SM,5        Auto Connect ANY Mode (Mode =ANY)
 181                 each time GPIO is set, make inquiry and connect to the first found device
 182 SM,6        automatically reconnect(Mode =Pair)
 183                 confirm: auto connect works well but difficult to enter command mode.
 184
 185
 186 Fast data mode
 187 --------------
 188 The module enters fast data mode after 'remote configuration timer' window is passed from power on.
 189 In this mode the module does not accept '$$$' to enter command mode.
 190
 191 Power Management
 192 ----------------
 193 Inquiry and Page window     Idle or Active  (3.1.1)
 194     Downside: delay in discovery or connection time
 195     SI,         // set inquiry scan window(discovery) on/off duty?
 196     SJ,         // set page scan window(connection)
 197     This reduces averaege power >20mA to 5mA(3mA in Sniff mode)
 198
 199 Sniff mode                  Transmit
 200     Sniff mode is disabled by default and radio is active continuously when connected.(25-30mA)
 201     In Sniff mode the radio wakes up intermittently and sleeps in very low power mode.(2mA)
 202     SW,<val>    // set interval timer(*0.625ms) 0000-7FFF
 203
 204 Deep sleep                  Idle            (3.1.2)
 205     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.
 206     SW,8320     // deep sleep enable(interval=0x320*0.625=500ms)
 207     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.
 208     To wake from deep sleep there are three ways: (in worst case wake up takes 5ms)
 209         *send a charactor to the UART(first charactor will be lost)
 210         *toggle CTS low to high and wait 5ms
 211         *wake automatically every slot time(<val>*0.625ms)
 212     Once the radio is awake it stay active for exactly 1 second of inactivity and then sleeps again.
 213     Downside: latency and data loss
 214
 215 Disable Output driver       Idle or Active  (3.1.3)
 216     S%,1000     // set all GPIO pins(0-11) to inputs.
 217
 218 Lower Transmit Power        Idle or Active  (3.1.4)
 219     SY,<hex>    // transmit power setting(takes effect after a power cycle and reboot)
 220     Downside: reducing effective range
 221
 222
 223 Optimizig for Latency
 224 ---------------------
 225 By default the firmware is optimized for throughput.
 226 SQ,16           // set latency bit
 227 SQ,0            // unset latency bit
 228
 229
 230 Configuration timer settings
 231 ----------------------------
 232 Remote configuration is used for the module to be configured with various commands over Bluetooth(SPP profile only?).
 233
 234 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.)
 235     ST,0        // no remote, no local when connected
 236     ST,<1-252>  // local and remote with timeout in seconds from power up
 237     ST,253      // local only       without timeout
 238     ST,254      // remote only      without timeout
 239     ST,255      // local and remote without timeout
 240
 241
 242 Android
 243 -------
 244 3.7.1.5 Note: To connect with Android phone the modules must wake up 11ms every 2.5seconds.
 245
 246
 247 Commands
 248 --------
 249 SC,
 250 SM,<val>
 251 SD,
 252 SP,<string>             Pin code(alpahnumeric)
 253 SQ,<mask>               Special configuration(GPIO, discovery mode, low latency, reboot, UART)
 254 SR,<hex>                Store remote address
 255 SR,Z                    Erase all address
 256 SS,<string>             Set service name(1-20)**
 257 ST,<val>                Remote configuration timer(Master:0, Slave:0-255, Triger:as idle timer)
 258 SU,<val>                UART baud rate
 259 SW,<val>                low-power sniff mode** deep sleep and wake up every 625us * <val>
 260 SX,<0|1>                bonding enable  only acceps device that matches the stored address
 261 SY,<hex>                power setting**
 262 SZ,<val>                non-standard raw baud rate  <val>=baud*0.004096
 263 S~,<val>                Profile     0:SPP, 5:APL, 6:HID
 264 S-,<string>             Device name     -15 alphanumeric charactors
 265 S?,<0|1>                role switch enable
 266 S$,<char>               command mode char
 267 $|,<hex>                low-power connect mode  deep sleep/active(discoverable and connectable) cycle
 268 D                       display basic setting
 269 E                       display extended setting
 270 GB                      display the device's Bluetooth address
 271 GF                      display Bluetooth address of connected device
 272 GK                      show connection status
 273 GR                      show remote address for reconnecting
 274 G&                      show GPIO pin
 275 G<char>                 show stored setting
 276 +                       toggle local echo on/off
 277 &                       show GPIO 3,4,6,7(DIP switch)
 278 C                       connect to stored remote address
 279 C,<address>             connect last address
 280 CFI                     connect and go into fast data mode
 281 CFR                     connect and go into fast data mode
 282 CT,<address>,<val>      connect to the address and disconnect after val?
 283 F,1                     fast data mod:
 284 H                       display help
 285 I,<time>,<cod>          inquiry scan with <cod>
 286 IN
 287 IQ                      scan
 288 IS                      inquiry scan with 001F00
 289 J                       hide pin code
 290 K,                      kill    disconnects current connection
 291 L                       link quality
 292 M                       show modem signlal status
 293 O                       display other settings
 294 P,<car>                 pass through?
 295 Q                       quiet mode  make the module not discoverable
 296 Q,0                     discoverable and connectable
 297 Q,1                     not discoverable and not connectable
 298 Q,2                     not discoverable and connectable
 299 Q,?                     display current quiet mode
 300 R,1                     reboot
 301 T,<0|1>                 pass received data while in command mode
 302 U,<baud>,<parity>       change UART setting tentatively
 303 V                       display firmware version
 304 W                       wake from quiet mode    enable discovery and connection
 305 Z                       deep sleep mode(<2mA)