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Roving RN-42
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============
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TODO
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----
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Bug:
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- with Nexus5 keyboard and mouse are very laggy.
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- lose USB connection during power-down mode
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- USB initialize code in main() causes this - WRONG
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- Do not power-down during USB connection is active - DONE 11/11
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(USB_DeviceState == USB_DEVICE_Configured) is used to check USB connection
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matrix_power_down() matrix.c - 11/23
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Todo:
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Design:
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- remove MCU dependent power saving code from core/keyboard
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- it should be located in project matrix.c - DONE 11/23
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- HHKB matrix.c needs matrix_prev?
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- is_modified() is obsolete now. really needs?
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LUFA:
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USB connection check: state of USB deivce
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- USB_DeviceState:
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USB_Deivce_State_t { Unattached, Powered, Default, Addressed, Configured*, Suspended* }
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- USB_IsInitialized: state of LUFA core setup
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becomes true in USB_Init() USBController_AVR8.c
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becomes false in USB_Disable() USBController_AVR8.c
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- USB_VBUS_GetStatus(): state of VBUS(power/connection)
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- USB_Disable() detaches, disables all interrupts, controller, PLL, regulater.
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Power saving:
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- confirm suspend mode lufa.c: matrix_power_*, suspend_wakeup_condition
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- 8MHz clock
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- When not connected in a few minutes get into deep sleep to save battery life
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- CTS is needed for waking up from deep sleep? How deep sleep is activated?
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@ -19,6 +44,9 @@ Power saving:
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- high resistor 100K/1M?
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capacitor 10nF
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http://www.eevblog.com/forum/beginners/measuring-battery-voltage-without-consuming-current/
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- During USB suspend change clock source to internal RC from external Xtal(6.8)
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- FRZCLK: you can freeze clock for power saving. still WAKEUPI and VBUSTI interrupts are available while freezing.(21.7.3)
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- Suspend: Clear Suspend Bit, Freeze clock, disable PLL, MCU sleep(21.13)
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Improving:
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- BT LED; connecting, linked, sleeping, deep sleeping
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@ -306,6 +334,10 @@ SM,5 Auto Connect ANY Mode (Mode =ANY)
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SM,6 automatically reconnect(Mode =Pair)
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confirm: auto connect works well but difficult to enter command mode.
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SR,Z removes all remote addresses for reconnecting.
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can be used to connect another host
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SR,I registers last inquiry address
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Fast data mode
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--------------
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@ -0,0 +1,102 @@
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RN-42
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=====
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HHKB key switch power control
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-----------------------------
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MOS FET Nch: BSS138 or IRLML6344T, either works and no apparent difference.
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Normally on(pull-up) or off(pull-down)? interms of power saving it prefers pull-down?
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Pull-down will be better for power saving, normally off.
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Used Timer
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----------
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8MHz clock
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----------
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1) 16MHz xtal with system prescaler div2: F_CPU=8MHz, F_USB=16MHz
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2) 8MHz xtal with div1: F_CPU=8MHz, F_USB=8MHz
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Hardware USART doesn't work at 115200bps with 8MHz(F_CPU).
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workaround:
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a) use Sotwre serial for communcation with RN-42
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b) reduce baud of RN-42 to lower rate;(factory default is 115200bps)
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10/03
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Slave mode
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----------
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Discovery/Inquire
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Connect/Page
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SI,0012
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SJ,0012
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InqWindw=0100
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PagWindw=0100
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Sniff mode
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----------
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0.625ms * <hex>
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SW,0320 Very sluggish. Type is not lost but very slow to register.
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SW,0160 Still sluggish. may transposed? can type but ...
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Mouse point move intermittently
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SW,0020 feel a bit late like stumble(20ms)
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SW,0010 feel no latency(10ms)
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Deep sleep
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----------
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SW,8010
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TX power
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--------
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SY,fff4
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IO pins
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-------
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S%,1000 status led and connection control don't work
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GPIO5: status LED
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GPIO6: Connection control
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GPIO2: linked status
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Ver 6.15 04/26/2013
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(c) Roving Networks
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***Settings***
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BTA=00066667BBE9
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BTName=tmkBT-BBE9
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Baudrt(SW4)=115K
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Mode =DTR
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Authen=1
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Bonded=0
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Rem=001BDC06415B
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***ADVANCED Settings***
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SrvName= keyboard/mouse
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SrvClass=0000
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DevClass=1F00
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InqWindw=0012
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PagWindw=0012
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CfgTimer=255
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StatuStr=NULL
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HidFlags=3c
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DTRtimer=8
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KeySwapr=0
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***OTHER Settings***
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Profile= HID
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CfgChar= $
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SniffEna=8010
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LowPower=0 S|,
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TX Power=fff4 SY,
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IOPorts= 0
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IOValues=0
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Sleeptmr=0
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DebugMod=0
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RoleSwch=0
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