Update MEMO

This commit is contained in:
tmk 2014-11-29 21:14:00 +09:00
parent 570bcb2ed1
commit de29f986a7

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@ -9,33 +9,84 @@ Bug:
- 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
- When given power only from wall wart adapter
- 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)
- USB plug-in while BT failes
- 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
- repeated CHARGING/FULL_CHARGED
- In LTC sharp pulses are observed.
- MCP has no pulse but still has a problem.
- needs more wait before read pin state?
- wrongly suspended when powered from adapter without USB connection
- 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
Todo:
- sendchar() in lufa.c block loop - 11/29
- block loop when powered with AC adapter
- FrameNumber is not updated when adapter powered
- sendchar() in lufa.c no buffer
- no buffering. character lost can be caused.
Design:
- suspend.h - DONE 11/26
- remove argument from suspend_power_down() for backward compatitibility
- remove MCU dependent power saving code from core/keyboard
- it should be located in project matrix.c - DONE 11/23
- 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- is_modified() is obsolete now.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:
- 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
@ -63,6 +114,9 @@ Improving:
- ADC resolution
AVR120
AVR32138
- Enhancing ADC resolution by oversampling
AVR121 http://www.atmel.com/images/doc8003.pdf
Testing:
- Factroy reset doesn't work; need to **test again** 10K pull-up is too high?