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-rw-r--r--keyboard/hhkb_rn42/MEMO.txt36
1 files changed, 34 insertions, 2 deletions
diff --git a/keyboard/hhkb_rn42/MEMO.txt b/keyboard/hhkb_rn42/MEMO.txt
index 2f61574c30..337dad6039 100644
--- a/keyboard/hhkb_rn42/MEMO.txt
+++ b/keyboard/hhkb_rn42/MEMO.txt
@@ -1,12 +1,37 @@
Roving RN-42
============
-TODO
-----
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+ - is_modified() is obsolete now.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?
@@ -19,6 +44,9 @@ Power saving:
- 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
@@ -306,6 +334,10 @@ SM,5 Auto Connect ANY Mode (Mode =ANY)
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
--------------