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@@ -1,27 +1,35 @@ |
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Roving RN-42 |
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============ |
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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. |
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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. |
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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. |
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TODO |
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---- |
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Power saving: |
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- When not connected in a few minuts get into deep sleep to save battery life |
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- CTS is needed for waking up from deep sleep? How deep sleep is activated? |
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Improving: |
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- Status LED; connecting, liked, low battery, sleeping, deep sleeping |
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- Battry voltage display by command; like full(solid), medium(blink), low(flash) |
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- move rn42 to protocol directory when it becomes reusable stack |
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- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256). |
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- Factroy reset doesn't work; need to test again. 10K pull-up is too high? |
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- Lipo voltage ADC sensing |
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- Lipo charger configuration: fast charge time: USB charger spec? |
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- Low voltage alarm: LED indcates voltage of Lipo |
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- CTS/RTS lines are needed? just connect in loop back if no flow control is needed. |
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- CTS is needed for waking up from deep sleep? |
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- Serial API callback when data are available/received(and when send buffer is available) |
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- Serial API instance several serial ports can be used |
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- DCDC converter: squeaky inducter with onsemi NCP1402 |
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- Lipo charger MCP73831: needs capacitor 4.7uF *2 |
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Testing: |
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- Factroy reset doesn't work; need to **test again** 10K pull-up is too high? |
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- Lipo voltage ADC value is not stabilized |
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- DCDC converter: squeaky inducter; try other inductors |
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- Keymap layer bug: during space is pressed(mousekey) press Fn(HHKB) then release space before Fn, in result HHKB layer is locked(toggled) unintentionally. |
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DONE: |
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- Lipo charger configuration: fast charge time: USB charger spec? -- used 2kohm |
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- use LED of charger to alarm low battery. LED should be powered directly from Lipo? - cancel; powered from VUSB |
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- Use RTS in serial_uart.c to resolve missing chars from help message of RN-42 - done |
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- CTS/RTS lines are needed? just connect in loop back if no flow control is needed. - done |
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- add IO pin to charger status CHRG; LED control(low) and detect charge status(input HiZ) 07.24 |
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- LINKED: add trace on PIO2 to PF6 07.24 |
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- Lipo voltage ADC sensing |
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- Lipo charger MCP73831: needs capacitor 4.7uF *2 |
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- USB connection check - 07.01 |
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- BT on/off check: whether RX line is pulled up? - checking RTS 07.01 |
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- USB/BT switching BT is on -> BT, BT is off -> USB - 07.01 |
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@@ -30,22 +38,35 @@ DONE: |
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- Power selector doesn't work; Q4 MOSFET leaks from Lipo to USB power line. -- use Schottky instead 07/04 |
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TROUBLE SHOOT |
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------------- |
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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. |
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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. |
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Lipo |
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---- |
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850mA lasts around 9 hours(07/28) |
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Sparkfun Polymer Lithium Ion Battery 850mAh: |
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https://www.sparkfun.com/products/341 |
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Lipo Cell spec: |
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https://www.sparkfun.com/datasheets/Batteries/063048%20Li-polymer.pdf |
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Protection spec: |
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http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/BatteryProtection.pdf |
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min typical max |
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over-charge 4.255 4.280 4.305 |
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over-charge discover? 4.030 4.080 4.130 |
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over-discharge 2.827 2.900 2.973 |
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over-discharge discover 3.022 3.100 3.178 |
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min typical max |
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over-charge 4.255 4.280 4.305 |
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over-charge discover? 4.030 4.080 4.130 |
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over-discharge 2.827 2.900 2.973 |
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over-discharge discover 3.022 3.100 3.178 |
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ADC voltage monitor: voltage divider 10K+10K(0.5) |
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ADC=V*0.5/2.56*1024 |
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ADC=V*0.5/2.56*1024 |
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V ADC |
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------------------ |
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4.20 0x347(839) |
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@@ -134,7 +155,9 @@ R,1 reboot |
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Apple iOS |
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--------- |
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Cannot supported without apple iAP authentication chip. |
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Keyboard can be used with iPhone, but mouse cannot. |
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To operate iOS with keyboard is not so useful, though. |
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There may be iOS specific scancodes? |
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HID flag register |
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@@ -158,6 +181,7 @@ GH |
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0100: Joystick |
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1xxx: reserved |
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Out report - Indicator |
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---------------------- |
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0xFE 0x02 0x01 <LED_state> |