Difference between revisions of "Lia"

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=== Jumper Configuration ===
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== Jumper Configuration ==
 
There are a number of jumpers on Lia used to configure voltage levels and power input. Their locations and functions are identical to those on the Lisa/M v2.0. The descriptions below thus apply to both boards.
 
There are a number of jumpers on Lia used to configure voltage levels and power input. Their locations and functions are identical to those on the Lisa/M v2.0. The descriptions below thus apply to both boards.
  

Revision as of 14:46, 21 March 2013

Lia is a lower cost version of Lisa/M first developed for inclusion with the Quadshot Mocha.

Differences from Lisa/M

  • 0.1" pitch connectors instead of molex picoblade
  • No CAN transceiver (footprint still present just not populated)
  • No I2C2 level shifter (footprint still present just not populated)
  • No 5V voltage regulator (footprint still present just not populated)
  • No JTAG connector (footprint still present just not populated)
  • Added servo power inline resistors (by default 0 ohm but can be changed to higher value for balancing the linear voltage regulators of the motor controllers)

Pictures

Jumper Configuration

There are a number of jumpers on Lia used to configure voltage levels and power input. Their locations and functions are identical to those on the Lisa/M v2.0. The descriptions below thus apply to both boards.

The default configuration is UART3 VCC at V_IN, UART1/2/5 VCC at +3V3, with the V_SERVO servo voltage rail NOT connected to the autopilot V_IN rail, allowing one to power the autopilot and servos separately. The +5V regulator is NOT bypassed, allowing a regulated +5V on listed headers and for the CAN transceiver and I2C level shifter. The V_BATT connector is NOT connected to V_IN, so one can attach a battery voltage to the V_BATT pin to measure the battery voltage, if so desired.


Power Jumper Configuration
Jumper Bus Connection Default Description
JP1 SERVO_BUS to V_IN OPEN Connects servo header voltage rail SERVO_BUS to autopilot input voltage V_IN rail
JP2 V_BATT to V_IN OPEN Connects I2C1/CAN rail V_BATT to autopilot input voltage V_IN rail
JP3 V_IN to +5V OPEN Connects autopilot input voltage V_IN rail to autopilot +5V rail, bypassing onboard 5V supply


UART3 VCC Configuration
Jumper Bus Connection Default Description
JP6 UART3_VCC to V_IN CLOSED Connects UART3 connector VCC to autopilot input voltage V_IN rail
JP7 UART3_VCC to +3V3 OPEN Connects UART3 connector VCC to autopilot +3V3 rail

WARNING: UART3 GPS Connector is connected to V_IN, check your GPS input voltage before connecting!!!

WARNING: DO NOT CLOSE BOTH JP6 AND JP7 SIMULTANEOUSLY!!!


UART2 VCC Configuration
Jumper Bus Connection Default Description
JP4 UART2_VCC to V_IN OPEN Connects UART2 connector VCC to autopilot input voltage V_IN rail SEE WARNING BELOW
JP5 UART2_VCC to +3V3 CLOSED Connects UART2 connector VCC to autopilot +3V3 rail

WARNING: UART2 RX is NOT 5V TOLERANT. Thus, while possible to connect UART2_VCC to V_IN, DO NOT ATTEMPT THIS. Only use JP5 (the default).

WARNING: DO NOT CLOSE BOTH JP4 AND JP5 SIMULTANEOUSLY!!!


UART1 and UART5 VCC Configuration
Jumper Bus Connection Default Description
JP8 UART1&5_VCC to V_IN OPEN Connects UART1 and UART5 connector VCC to autopilot input voltage V_IN rail
JP9 UART1&5_VCC to +3V3 CLOSED Connects UART1 and UART5 connector VCC to autopilot +3V3 rail

WARNING: DO NOT CLOSE BOTH JP8 AND JP9 SIMULTANEOUSLY!!!

There are additional jumpers on the board for expert or developer configurations, please see schematic and layout for more information.