Roving RN-42
============
-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; keyobard or console didn't work for some reason. Changing PID cured this problem. Very annoying, took very long time before resolved it.
+Bug:
+- with Nexus5 keyboard and mouse are very laggy.
+
+- lose USB connection during power-down mode
+ - 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
+
+Todo:
+
+Design:
+- remove MCU dependent power saving code from core/keyboard
+ - it should be located in project matrix.c - DONE 11/23
+- HHKB matrix.c needs matrix_prev?
+ - is_modified() is obsolete now. really needs?
+
+
+LUFA:
+USB connection check: state of USB deivce
+- USB_DeviceState:
+ USB_Deivce_State_t { Unattached, Powered, Default, Addressed, Configured*, 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.
+
+
+Power saving:
+- 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)
+
+Improving:
+- BT LED; connecting, linked, sleeping, deep sleeping
+- Battry LED; blink(using timer?)
+- move rn42 to protocol directory when it becomes reusable stack
+- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
+- ADC resolution
+ AVR120
+ AVR32138
+Testing:
+- Factroy reset doesn't work; need to **test again** 10K pull-up is too high?
+- Lipo voltage ADC value is not stabilized
+- DCDC converter: squeaky inducter; try other inductors
-TODO
-----
-- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
-- Factroy reset doesn't work; need to test again. 10K pull-up is too high?
-- Lipo voltage ADC sensing
-- Lipo charger configuration: fast charge time: USB charger spec?
-- Low voltage alarm: LED indcates voltage of Lipo
-- CTS/RTS lines are needed? just connect in loop back if no flow control is needed.
-- CTS is needed for waking up from deep sleep?
-- Serial API callback when data are available/received(and when send buffer is available)
-- Serial API instance several serial ports can be used
-- DCDC converter: squeaky inducter with onsemi NCP1402
-- Lipo charger MCP73831: needs capacitor 4.7uF *2
- Keymap layer bug: during space is pressed(mousekey) press Fn(HHKB) then release space before Fn, in result HHKB layer is locked(toggled) unintentionally.
+
+Done:
+- low battery alert(solid light) 09/04
+
+
+Power routing
+-------------
+Current:
+(USB) +---(Lipo)
+ | | |
+ | | +------+ DPDT
+ | | |Switch/-----------------------+
+ | | +------+ |
+ | +-------+ | |
+ +-|Charger| | |
+ | +-------+ | +---+ |
+ | | |MCU| |
+ | | +---+ |
+ | | | |
+ | | | |
++--------------+ +-----+ +------+ +---/--+ +-----+
+|Power Selector|--|DC 5V|--|DC3.3V|---|Switch|----|RN-42|
++--------------+ +-----+ +------+ +------+ +-----+
+USB Power is boosted unnecessarily, not harmful?
+
+Idea 1:
+(USB) +---(Lipo)
+ | | |
+ | | +------+ DPDT
+ | | |Switch/----------+
+ | | +------+ |
+ | +-------+ | |
+ +-|Charger| | |
+ | +-------+ | +---+ |
+ | +-----+ |MCU| |
+ | |DC 5V| +---+ |
+ | +-----+ | |
+ | | | |
++--------------+ | +---/--+ +------+ +-----+
+|Power Selector|-----+---|Switch|----|DC3.3V|-----|RN-42|
++--------------+ +------+ +------+ +-----+
+To enable BT when USB powered it still needs to turn siwtch on, Lipo consumes quinscent current at 5V converter in vain.(Not good)
+
+Idea 2:
+(USB) +---(Lipo)
+ | | |
+ | | +------+
+ | | |Switch|
+ | | +------+
+ | +-------+ |
+ +-|Charger| |
+ | +-------+ | +---+
+ | +-----+ |MCU|----+ Controlled by firmware
+ | |DC 5V| +---+ | On: Lipo powered
+ | +-----+ | | Off: USB powered
+ | | | |enable
++--------------+ | +------+ +-----+
+|Power Selector|-----+---|DC3.3V|-----|RN-42|
++--------------+ +------+ +-----+
+MCU can controlled power of RN-42 without hardware switch.
+When USB powered and switch is on Lipo consumes quinscent current at 5V converter in vain.(Not good)
+
+Idea 3:
+(USB) +---(Lipo)
+ | | |
+ | | +------+
+ | | |Switch|SPST(or without)
+ | | +------+
+ | +-------+ |
+ +-|Charger| |
+ | +-------+ | +---+
+ | | |MCU|----+ Controlled by firmware
+ | | +---+ | On: Lipo powered
+ | | | | Off: USB powered
+ | | | |enable
++--------------+ +-----+ +------+ +-----+
+|Power Selector|-|DC 5V|-|DC3.3V|-----|RN-42|
++--------------+ +-----+ +------+ +-----+
+Switch is needed to save Lipo when not used because decent power saving is not available now. If firmware can turn off BT module completely and make MCU deep sleep the switch will be not even needed.
+
+
+
+
+
DONE:
+- 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
- Power selector doesn't work; Q4 MOSFET leaks from Lipo to USB power line. -- use Schottky instead 07/04
+
+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; keyobard or console didn't work for some reason. Changing PID cured this problem. Very annoying, took very long time before resolved it.
+
+
+
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
+ 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
+ ADC=V*0.5/2.56*1024
+
V ADC
------------------
4.20 0x347(839)
Apple iOS
---------
-Cannot supported without apple iAP authentication chip.
+Keyboard can be used with iPhone, but mouse cannot.
+To operate iOS with keyboard is not so useful, though.
+There may be iOS specific scancodes?
HID flag register
0100: Joystick
1xxx: reserved
+
Out report - Indicator
----------------------
0xFE 0x02 0x01 <LED_state>
SM,6 automatically reconnect(Mode =Pair)
confirm: auto connect works well but difficult to enter command mode.
+SR,Z removes all remote addresses for reconnecting.
+ can be used to connect another host
+SR,I registers last inquiry address
+
Fast data mode
--------------
projects / tmk_firmware.git / blobdiff