Difference between revisions of "Tiny v2"
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|7||SCK||I/O||SPI0 Serial clock. Clock output from master or input to slave|| | |7||SCK||I/O||SPI0 Serial clock. Clock output from master or input to slave|| | ||
|} | |||
{|border="1" cellspacing="0" style="text-align:center" cellpadding="6" | |||
|+'''PPM''' | |||
!''Pin #''!!''Name''!!''Type''!!''Desription''!!width="50"|''Suggested Color'' | |||
|- | |||
|1||GND||PWR||common ground||style="background:black; color:white"|Black | |||
|- | |||
|2|| +5v||PWR||5V Rail from Tiny to R/C receiver supply||style="background:red; color:white"|Red | |||
|- | |||
|3||PPM_IN||IN||PPM Stream from R/C Receiver (5V tolerant)||style="background:white; color:black"|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'' | |||
{|border="1" cellspacing="0" style="text-align:center" cellpadding="6" | |||
|+'''USB''' | |||
!''Pin #''!!''Name''!!''Type''!!''Desription''!!width="50"|''Suggested Color'' | |||
|- | |||
|1||GND||PWR||common ground||style="background:black; color:white"|Black | |||
|- | |||
|2|| +3.3V||PWR||3.3V Rail from Tiny||style="background:red; color:white"|Red | |||
|- | |||
|3||USB+||I/O||USB bidirectional D+ line||style="background:green; color:white"|Green | |||
|- | |||
|4||USB-||I/O||USB bidirectional D- line||style="background:white; color:black"|White | |||
|- | |||
|5||VBUS||IN||Indicates the presence of USB bus power (P0.23) (5V Tolerant)||style="background:orange; color:white"|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|| | |||
|} | |} | ||
Revision as of 12:38, 9 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 top side view
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
Pins Name and Type are specified with respect to the Autopilot Board
| 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 (5V Tolerant) | Green |
| 8 | TXD1 | OUT | UART1 Serial Output (5V Tolerant) | Blue |
| Pin # | Name | Type | Desription | 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) | |
| 4 | MOSI | I/O | SPI1 Master Out Slave In. Data output from master or data input to slave | |
| 5 | MISO | I/O | SPI1 Master In Slave Out. Data input to master or data output from slave | |
| 6 | DRDY | IN | External interrupt 0 input (EINT0) | |
| 7 | SCK | I/O | SPI0 Serial clock. Clock output from master or input to slave |
| Pin # | Name | Type | Desription | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +5v | PWR | 5V Rail from Tiny to R/C receiver supply | Red |
| 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
| Pin # | Name | Type | Desription | 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 Tolerant) | 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 |