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Code Issues Wiki Activity

Merge pull request #322 from Velyks/master

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Add clarification of revisions to CJMCU Docs
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Dominic Clifton 2015-01-09 10:42:10 +00:00
commit c2889b667b
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docs/Board - CJMCU.md
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@ -9,8 +9,8 @@ This board does not have an onboard USB-Serial converter, so an external adapter
| Revision | Notes |
| -------- | ----- |
| 1 | no boot jumper at the edge of the board. |
| 2 | identified by no boot jumper pads at the edge of the board. |
| 1 | No boot jumper pads by LED1. Uses blue and red LEDs |
| 2 | Boot jumper pads presoldered with pins and a jumper by LED1. Uses green and red LEDs. |
Version 2 boards are supported from firmware v1.4.0 onwards, do NOT flash earlier versions to version 2 boards.
@ -24,9 +24,11 @@ Version 2 boards are supported from firmware v1.4.0 onwards, do NOT flash earlie
| PA1 | RC Channel 2 |
| PA2 | RC Channel 3 / USART2 TX |
| PA3 | RC Channel 4 / USART2 RX |
| VCC | Power +3.3v |
| VCC | Power (See note) |
| GND | Ground |
NOTE: The VCC RX Pin is not regulated and will supply what ever voltage is provided to the board, this will mean it'll provide 5v if a 5v serial connection is used. Be careful if you are using a voltage sensitive RX. A regulated 3.3v supply can be found on the top pin of column 1, just below the RX GND pin.
## Serial Connections
USART1 (along with power) is on the following pins.
@ -108,10 +110,32 @@ To flash the board:
* Click "Flash Firmware"
* You should see "Programming: SUCCESSFUL" in the log box
* Click "Connect" -> This should open the "Initial Setup" tab and you should see sensor data from the quad shown
* Unplug the quad and solder across the 2 "BOOT0" pins - This prevents the board from going into bootloader mode on next
boot, if anything goes wrong, simply unsolder these pins and the bootloader will start, allowing you to reflash. You cannot
* Unplug the quad and short the 2 "BOOT0" pins. Revision 1 boards require this to be soldered, revision 2 boards can connect the included jumper to the two pre-soldered pins - This prevents the board from going into bootloader mode on next
boot, if anything goes wrong, simply disconnect these two pins and the bootloader will start, allowing you to reflash. You cannot
overwrite the bootloader.
# Charging
The CJMCU has on it a TP4056 Lithium battery charging IC that can charge a 1S battery at 1A using a provided 5v supply attached to the 5v serial pin.
To charge an attached battery:
* Set the power switch to OFF
* Set the charge switch to CHG
* Plug in a 1S battery to the battery pins
* Plug in a 5v supply to the 5v serial pins
The charger will finish when either the battery reaches 4.2v, or the battery's voltage is greater than the charger's input voltage.
The two nearby LEDs will show the status of charging:
| Status | Green LED | Red LED |
|--------------------|-----------|-----------|
| Charging | On | Off |
| Finished | Off | On |
| 5v not connected | Off | Off |
| Batt not connected | Flashing | On |
# Helpful Hints
* If you are only using a 4 channel RX, in the auxiliary configuration tab, you can add a "Horizon" mode range around 1500