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Diffstat (limited to 'keyboard/hhkb/rn42/MEMO.txt')
| -rw-r--r-- | keyboard/hhkb/rn42/MEMO.txt | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/keyboard/hhkb/rn42/MEMO.txt b/keyboard/hhkb/rn42/MEMO.txt new file mode 100644 index 0000000000..0363c2f433 --- /dev/null +++ b/keyboard/hhkb/rn42/MEMO.txt @@ -0,0 +1,255 @@ +Memo of deveopment +================== +just memo, NOT WORTH READING + +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 + - is_modified() is obsolete now.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 + |