--- /dev/null
+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+ - is_modified() is obsolete now.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
+
projects / qmk_firmware.git / blobdiff