Difference between revisions of "Tiny v2"

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== Architecture ==
== Architecture ==


== Pinout ==
== Pinout (v2.11) ==
Pins Name and Type are specified with respect to the Autopilot Board
Pins Name and Type are specified with respect to the Autopilot Board


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|4||BOOT||IN||In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) ''(Note 2)''||
|4||BOOT||IN||In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) ''(Note 2)''||
|-
|-
|5||GPS_RESET||IN||leave unconnected, hold this pin low only for bootloader programming ''(Note 3)''||
|5||GPS_RESET||IN||leave unconnected, hold this pin low only for bootloader programming||
|-
|-
|6||TXD0||OUT||UART0 Serial Output (shared with GPS receiver)||style="background:blue; color:white"|Blue
|6||TXD0||OUT||UART0 Serial Output (shared with GPS receiver)||style="background:blue; color:white"|Blue
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|}
|}
''Note 2 : Holding this pin low for at least 3mS after a RESET (or power up) instructs the controller to enter programming mode.''
''Note 2 : Holding this pin low for at least 3mS after a RESET (or power up) instructs the controller to enter programming mode.''
''Note 3 : '''MAXIMUM VOLTAGE ON THIS PIN : 1.95V !!! '''''




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|}
|}


== Schematic ==
== Schematic (v2.11)==
<gallery>
<gallery>
Image:Tiny v2-1 Schematic.png|Tiny v2.1 Schematic
Image:Tiny v2-1 Schematic.png|Tiny v2.1 Schematic
</gallery>
</gallery>


== PCB ==
== PCB (v2.11)==
<gallery>
<gallery>
Image:Tiny_v2-1_PCB_top.jpg|Tiny v2.1 PCB top side view (Olimex)
Image:Tiny_v2-1_PCB_top.jpg|Tiny v2.1 PCB top side view (Olimex)
Line 246: Line 244:
</gallery>
</gallery>


== Assembly ==
== Assembly (v2.11)==
<gallery>
<gallery>
Image:Tiny_v2-1_2D_top.jpg|Tiny v2.1 top components Layout
Image:Tiny_v2-1_2D_top.jpg|Tiny v2.1 top components Layout

Revision as of 14:59, 18 December 2007

Features

  • Single LPC2148 MCU
  • 8 Analog input channels 0V - 3.3V (2 channels with optional on-board 5v -> 3.3v resistor bridge)
  • 1 3.3V TTL UART (5V tolerant)
  • 8 PWM outputs
  • 1 R/C receiver PPM frame input
  • 1 SPI bus
  • 1 I2C bus
  • 1 USB (client)
  • Integrated GPS receiver and patch antenna (4Hz update)
  • 5V/2.5A switching power supply & 3.3V/1A linear regulator
  • 3 status LEDs with attached test point
  • ?? grams
  • 70.8 x 40mm (smaller then a banking card)
  • 2 layers PCB design, 0603 components

  • Tiny v2.1 3D top view (18mm GPS antenna)

  • Tiny v2.1 3D bottom view

  • Tiny v2.1 top side view (13mm GPS antenna)

  • Tiny v2.1 bottom side view

The Tiny v2.1 autopilot uses a single Philips LPC2148 ARM7 based microcontroller. The ARM7 is a low-power 32-bit RISC processor core and the Philips LPC2148 has 512KB on-chip Flash ROM, 40KB RAM and can be clocked at 60MHz.

Although critical control code such as the R/C interface and servo output are well segregated in Paparazzi software and well protected from interference from flaws in the stability/navigation/comm/payload code, great care must be taken when experimenting with new software as some errors can cause a the processor to halt or stall for extended periods causing total loss of control.

Architecture

Pinout (v2.11)

Pins Name and Type are specified with respect to the Autopilot Board

Tiny v2-1 pinout.png


SERIAL
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5V PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 DTR
5 CTS
6 RTS
7 RXD1 IN UART1 Serial Input (3.3V level, 5V Tolerant) Green
8 TXD1 OUT UART1 Serial Output (3.3V level) Blue


SPI
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 SSEL IN SSP Slave Select. Selects the SSP interface as a slave (SSEL1) Braun
4 MOSI I/O SPI1 Master Out Slave In. Data output from master or data input to slave Grey
5 MISO I/O SPI1 Master In Slave Out. Data input to master or data output from slave Green
6 DRDY IN External interrupt 0 input (EINT0) Purple
7 SCK I/O SPI0 Serial clock. Clock output from master or input to slave Yellow


PPM
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny to R/C receiver supply Orange
3 PPM_IN IN PPM Stream from R/C Receiver (5V tolerant) White
4 SERV_RST OUT external PPM decoder reset (Note 1)
5 SERV_CLK OUT external PPM decoder clock (Note 1)

Note 1 : Used only if servos are connected to the R/C receiver


USB
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 USB+ I/O USB bidirectional D+ line Green
4 USB- I/O USB bidirectional D- line White
5 VBUS IN Indicates the presence of USB bus power (P0.23) (5V level) Orange
6 BUTTON IN External Button (+3.3v pullup)
7 LED3 OUT GPIO (LED #3 command)
8 ADC_7 IN Analog to Digital Converter Input #7


IRV
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 IRV IN Vertical IR Sensor signal (Analog to Digital Converter Input #0) Purple


IRH
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 IRH_2 IN Horizontal IR Sensor signal axis 2 (Analog to Digital Converter Input #2) Grey
4 IRH_1 IN Horizontal IR Sensor signal axis 1 (Analog to Digital Converter Input #1) Braun


ADC1
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 ADC_4 IN Analog to Digital Converter Input #4
5 ADC_3 IN Analog to Digital Converter Input #3


ADC2
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 ADC_6 IN Analog to Digital Converter Input #6 (Maximum input level can be selected with R12 & R14 values)
5 ADC_5 IN Analog to Digital Converter Input #5 (Maximum input level can be selected with R13 & R15 values)


DOWNLOAD
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 BOOT IN In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) (Note 2)
5 GPS_RESET IN leave unconnected, hold this pin low only for bootloader programming
6 TXD0 OUT UART0 Serial Output (shared with GPS receiver) Blue
7 RXD0 IN UART0 Serial Input (shared with GPS receiver) Green

Note 2 : Holding this pin low for at least 3mS after a RESET (or power up) instructs the controller to enter programming mode.


I2C
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5V PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 SDA I/O I2C bus Serial DAta
5 SCL I/O I2C bus Serial CLock


CAM
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5V PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 CAM_SW OUT video source/payload selection signal
5 SRV_1 OUT Servo PWM signal #1
6 SRV_5 OUT Servo PWM signal #5
7 AUX PWR video/payload switchable 5V power suply

Schematic (v2.11)

  • Tiny v2.1 Schematic

PCB (v2.11)

  • Tiny v2.1 PCB top side view (Olimex)

  • Tiny v2.1 PCB top copper

  • Tiny v2.1 PCB bottom side view (Olimex)

  • Tiny v2.1 PCB bottom copper

Assembly (v2.11)

  • Tiny v2.1 top components Layout

  • Tiny v2.1 bottom components Layout

  • Tiny v2.1 top components details

  • Tiny v2.1 bottom components details

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