@@ 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- is_modified() is obsolete now.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?