Joystick Interface

From RoboJackets Wiki
Revision as of 22:54, 13 June 2018 by Ndaugherty6 (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

If you're looking for how to use the joystick see the Joystick page.

Parts

Part numbers listed are those of the Digi Key Corporation parts database. Note - some generic parts do not have part numbers listed.

Processor

  • ATTINY26-16SI-ND - U3 - Atmel AVR Microcontroller
  • LED2 - Green LED for use by programs running on the microcontroller
  • R3 - 470 ohm resistor in series with LED2
  • R4 - 470 ohm pullup resistor for joystick DATA
  • R5 - 470 ohm pullup resistor for joystick ACK

CAN Specific

  • MCP2515 - U2 - Microchip CAN Controller with SPI Interface
  • MCP2551 - U1 - Microchip CAN TransponderP966-ND
  • R1 - 10k ohm pullup resistor for the RESET command
  • R6 - 10k ohm pullup resistor for the CAN chip select

Onboard Power Control

  • UA78M05DCY - U4 - 5V Linear Regulator
  • 1N4004GICT-ND - D1 - Diode
  • P966-ND - C1,C2 - 10 microfarad Capacitor
  • 399-2127-ND - C3,C4,C5 - 0.1 microfarad Capacitor
  • LED1 - Red LED to indicate power activity
  • R2 - 470 ohm resistor in series with LED1

Oscillator

  • 300-7022-1-ND - U4 - 11.0592 MHZ Clock Siqnal Oscillator

Headers

  • A19423-ND - J1 - Power 2-pin header
  • A19430-ND - J2 - CAN 3-pin header
  • A19436-ND - J3 - 9 pin header to joystick
  • A19520-ND - J4 - SPI connection to the MCU, 10 pin header

Misc.

  • 377-1090-ND - Box to contain the module
  • 1892K-ND - Standoffs

Electrical

Joystick Schematic.png Joystick Board.png

Port Pin Assignments on MCU

* Port A:
* Bit	Dir	Description
* 0	I	Pad DATA
* 1	O	Pad COMMAND
* 2	O	Pad ATT
* 3	O	Pad CLOCK
* 4	I	Pad ACK
* 5		Unused
* 6		Unused
* 7	O	Status LED

* Port B:
* Bit	Dir	Description
* 0	I	SPI data input, with pull-up
* 1	O	SPI data output
* 2	O	SPI clock
* 3	O	CAN /CS
* 4	I	Clock, not usable as I/O
* 5		Unused
* 6	I	CAN INT
* 7	I	/RESET, not usable as I/O
	

Code

C Source Files

  • can.c - communicates with the CAN controller, pretty much the same for all modules
  • joystick.c - code that controls the joystick's inputs
  • Makefile - programmer created file for configuring the compilation for gcc
  • psx.c - code that interfaces with the psx controller
  • spi_usi - hardware based spi