249 lines
9.6 KiB
Plaintext
249 lines
9.6 KiB
Plaintext
Roving RN-42
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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 - DONE
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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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- When given power only from wall wart adapter
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- it sleeps. it should not sleep
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- Configured state without USB connection?
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- timer is slow while power down - DONE 11/26
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- time out interrupt is lost while power down?
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- interrupt of watchdog timer compensates timer counter(avr/suspend.c)
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- USB plug-in fails while BT
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- it ends in suspend state
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- maybe, not responsive to host enumeration process due to power-down.
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- matrix_power_down() only when state is unattached - 11/26
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- need to observe a while
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- repeated CHARGING/FULL_CHARGED
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- In LTC sharp pulses are observed.
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- MCP has no pulse but still has a problem.
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- needs more wait before read pin state? - NO
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- wrongly suspended when powered from adapter without USB connection - DONE
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- suspend event may occur when plug into adapter
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- and never wake until conected to real USB line
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- without debug print via USB no problem; CSW(wake just after suspend as real USB line)
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- seems like USB print causes this problem after suspended
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- Factory Reset PIO4 doesn't work
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- the reason is unclear - 12/08 NOT LOOK INTO ANY MORE
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- WORKAROUND: use serial pins(3.3V, GND, RX and TX)
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- SF,1 and R,1 to set factory defalult
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Todo:
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- LED cover and switch knob and new Slide Switch
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- RN42 auto configuration
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- configure the module as HID device every time powering up
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- this'll reduce work load of assembly
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- move rn42 to protocol directory when it becomes reusable stack
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- sendchar() in lufa.c no buffer
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- no buffering. character lost can be caused.
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- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
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- switch BT host connections
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- BT operations
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- disconnect
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- new connection
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- switch next connection
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- remove connection
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- sendchar() in lufa.c block loop - DONE 11/29
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- block loop when powered with AC adapter
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- FrameNumber is not updated when adapter powered
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Improving:
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- ADC resolution
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AVR120
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AVR32138
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- Enhancing ADC resolution by oversampling
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AVR121 http://www.atmel.com/images/doc8003.pdf
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- disable digital input buffer DIDR(7.8.6)
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Design:
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- suspend.h - DONE 11/26
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- remove argument from suspend_power_down() for backward compatitibility
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- remove MCU dependent power saving code from core/keyboard - DONE 11/23
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- it should be located in project matrix.c
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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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- ADC: removing AREF capacitor C10
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- seems to be better while usb powered
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- still bad while battery powered
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http://electronics.stackexchange.com/questions/105849/avcc-and-capacitor-using-adc
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- ADC: smaller resistors for voltage dividor
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- 1K + 1K: not improved. - 11/27
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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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Unattached: unpluged
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Powered: pluged with power adapter
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Default: enumerate process bigin
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Addressed: addressed
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Configured: enumerated
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Suspended: 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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- When connect to power adapter
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- event happened: CW or CSW or C or DDC
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- USB state: not configured
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- USB evnets
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- USB connect: CSWRWRW
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- USB connect but fail to enumeration: CWRWRWRWS
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- USB disconnect: D
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- Power adapter connect: CW, CSW, C
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- Power adapter disconnect: D
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Power saving:
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- Pro2 current consumption
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- active: 138.2mA(no device on Hub)
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- suspended: 30.9mA(WakeUp enabled DIPSW6)
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- suspended: 0mA->46.0mA(WakeUp disabled DIPSW6)
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- Pro current consumption
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- active: 54.0mA
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- suspended: 40.5mA(WakeUp enabled DIPSW6)
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- suspended: 0.3mA(WakeUp disabled DIPSW6)
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- RN42 3.3V
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- disconnected(Idle): 5mA (config mode)
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- connected(Active):
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SW,0000: 23-26mA
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SW,0010: 27-29mA worse than 0000 for unknown reason
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SW,0020: 17-19mA mouse NG
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SW,0030: 13-16mA laggy mouse NG
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SW,0050: 10-13mA laggy mouse NG
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- matrix power saving
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- power saving while externally powered and not while unpluged
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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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- firmware controlled 3.3V DC converter to switch on/off BT module
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- sleep MCU and BT module(keyboard is not used)
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- deep sleep MCU and BT module(keyboard is not used for long time)
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- deep sleep MCU and turn off BT module(keyboard is not used and not connected)
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- Battery ADC; switching, high resistance
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- switching gnd end of divider with PF4
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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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- Voltage reference(8.1.1)
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- to reduce power consumption while power down mode
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- unset ADEN before sleep(24.7)
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Lipo
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----
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850mA lasts around 9 hours(07/28)
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Sparkfun Polymer Lithium Ion Battery 850mAh:
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https://www.sparkfun.com/products/341
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Lipo Cell spec:
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https://www.sparkfun.com/datasheets/Batteries/063048%20Li-polymer.pdf
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Protection spec:
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http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/BatteryProtection.pdf
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min typical max
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over-charge 4.255 4.280 4.305
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over-charge discover? 4.030 4.080 4.130
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over-discharge 2.827 2.900 2.973
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over-discharge discover 3.022 3.100 3.178
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ADC voltage monitor: voltage divider 10K+10K(0.5)
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ADC=V*0.5/2.56*1024
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V ADC
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------------------
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4.20 0x347(839)
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3.10 0x26b(619)
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TROUBLE SHOOT
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-------------
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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.
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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.
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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.
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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.
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It resolved with resoldering PF1 and new resistor on R12.
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Done:
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- low battery alert(solid light) 09/04
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- *** Rev.E BT test *** - DONE
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- with MCP73832, new Schottky, tantalum caps - DONE 12/07
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* MCP73832 doesn't leak from Vcc pin when unpluged and battery powered
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34mV vs 2.07V(MCP73831) at Vcc pin
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MCP73832 doesn't need revese protection diode D5
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* PMEG2010ER is very low VF while reverse current/voltage is high
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VF=0.96 vs 1.98(RB160M-30TR)with Fluke 175
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Anode of D11 is 680mV vs 20mV(RB160M-30TR)
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780mV is still low < 1.4V VBUS plugin detection(21.11)
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this doesn't cause false VBUS detect
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and 780mV on MCP73832 Vcc pin is also no problem.
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D5 can be removed.
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- ADC divider switching - DONE 12/07
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* Drain and Source of Q4 Pch was reversed wrongly on Rev.E.
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- reverse current from Lipo charger - DONE 12/07
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* MCP73832 has no recverse current from Vcc pin unlike MCP73831
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- Rev.F design - DONE
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- current measure point - DONE 12/08
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- change value of cap 68->47 - DONE 12/08
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- PPTC land pattern: no solder jumper, use 0Ohm resistor instead - CANCEL 12/08
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- Q4 Pch FET: wrong Drain and Source - DONE 12/08
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- D5 can be removed. - DONE 12/08
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- BT_INDICATOR LED turns on wrongly when touching line or pin. -- pull-up enabled on PF6/GPIO2 08/30
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- Lipo charger configuration: fast charge time: USB charger spec? -- used 2kohm
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- use LED of charger to alarm low battery. LED should be powered directly from Lipo? - cancel; powered from VUSB
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- Use RTS in serial_uart.c to resolve missing chars from help message of RN-42 - done
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- CTS/RTS lines are needed? just connect in loop back if no flow control is needed. - done
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- add IO pin to charger status CHRG; LED control(low) and detect charge status(input HiZ) 07.24
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- LINKED: add trace on PIO2 to PF6 07.24
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- Lipo voltage ADC sensing
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- Lipo charger MCP73831: needs capacitor 4.7uF *2
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- USB connection check - 07.01
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- BT on/off check: whether RX line is pulled up? - checking RTS 07.01
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- USB/BT switching BT is on -> BT, BT is off -> USB - 07.01
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- Under voltage lock out UVLO for protection of Lipo - Lipo has discharge protection at 3.100V 07.01
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- Power saving: HHKB scan, BT radio control - 9h with 850mAh, this is enough 07.01
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- Power selector doesn't work; Q4 MOSFET leaks from Lipo to USB power line. -- use Schottky instead 07/04
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