Difference between revisions of "SWLEDX8-I2C"

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== Features ==
 
== Features ==
  
−
* 16-Bit I2C interface
+
* 16-Bit Digital I/O card with a small form factor
 +
** [https://ww1.microchip.com/downloads/en/devicedoc/20001952c.pdf MCP23017] I/O Expander
 +
** I2C interface
 +
* Card can be used standalone or stacked together with the [[SWLEDX8]] card
 
* I2C Daisy-Chain (In/Out) connectors
 
* I2C Daisy-Chain (In/Out) connectors
 
* (3) I2C Address select jumpers for up to 8 devices per I2C bus
 
* (3) I2C Address select jumpers for up to 8 devices per I2C bus
 
* SCL/SDA termination jumpers
 
* SCL/SDA termination jumpers
−
* 2x10 pins
+
* 2x10 pins Digital I/O Header
 +
** 16 digital pins
 +
** 2 power, 2 ground pins
 
* 59mmx38mm
 
* 59mmx38mm
 
* (4) #4-40 mounting holes
 
* (4) #4-40 mounting holes
−
* Part of a two card system with [[SWLEDX8]]
+
* Software Drivers
  
−
== Layout ==
+
== Build Options ==
  
−
[[File:SWLEDX8-I2C.PNG]]
+
* There are a number of options for using the card
 +
** Stacked option with SWLEDX8 card
 +
** Small footprint option
 +
** Low height/profile option
 +
 
 +
=== Stacked option with SWLEDX8 card ===
 +
 
 +
* [[SWLEDX8]] card mounts above this card
 +
* Pins can be directly mounted to both cards or male/female connector pairs can be used
 +
 
 +
[[file:SWLEDX8-I2C_FRONT(DOWN)_REV2.png]]
 +
 
 +
=== Small footprint option ===
 +
 
 +
[[file:SWLEDX8-I2C_FRONT(STRT)_REV2.png]]
 +
 
 +
=== Low height/profile option ===
 +
 
 +
[[file:SWLEDX8-I2C_FRONT(RT_ANGL)_REV2.png]]
 +
 
 +
== Rear Side Marking ==
 +
 
 +
[[file:SWLEDX8-I2C_REAR(STRT)_REV2.png]]
 +
 
 +
== Connectors ==
 +
 
 +
* Connectors are as follows
 +
 
 +
[[file:SWLEDX8-I2C-CAD(REV2).PNG]]
 +
 
 +
=== P1 - GPIO Pins ===
 +
 
 +
[[file:SWLEDX8-I2C_P1A.PNG]]
 +
 
 +
==== Connections to SWLEDX8 Card ====
 +
 
 +
* When paired with SWLEDX8
 +
** MCP23017 Port A connects to SWITCHES 0-7 on [[SWLEDX8]]
 +
** MCP23017 Port B connects to LEDs 0-7 on [[SWLEDX8]]
 +
* Board Rev 2 reverses bit order for byte transfers can be used
 +
 
 +
[[file:SWLEDX8-I2C_P1.PNG]]
 +
 
 +
=== P2 - I2C Interface ===
 +
 
 +
[[file:SWLEDX8-I2C_P2A.PNG]]
 +
 
 +
* 2X5 header
 +
* Pinout
 +
 
 +
# GND
 +
# VCC
 +
# SDA
 +
# SCL
 +
# INTA
 +
 
 +
[[file:SWLEDX8-I2C_P2.PNG]]
 +
 
 +
=== P3 - I2C Terminators / I2C Address Offset Jumpers ===
 +
 
 +
[[file:SWLEDX8-I2C_P3A.PNG]]
 +
 
 +
* Install left 2 jumpers to terminate I2C bus
 +
** Typically, the "last" card in a chain
 +
* Install right 3 jumpers for I2C base address offset in range 0x20 (all installed) to 0x27 (all removed)
 +
 
 +
[[file:SWLEDX8-I2C_P3.PNG]]
 +
 
 +
{| class="wikitable"
 +
! I2C Address
 +
! J3(A2)
 +
! J3(A1)
 +
! J3(A0)
 +
|-
 +
| 0x0
 +
| In
 +
| In
 +
| In
 +
|-
 +
| 0x1
 +
| In
 +
| In
 +
| Out
 +
|-
 +
| 0x2
 +
| In
 +
| Out
 +
| In
 +
|-
 +
| 0x3
 +
| In
 +
| Out
 +
| Out
 +
|-
 +
| 0x4
 +
| Out
 +
| In
 +
| In
 +
|-
 +
| 0x5
 +
| Out
 +
| In
 +
| Out
 +
|-
 +
| 0x6
 +
| Out
 +
| Out
 +
| In
 +
|-
 +
| 0x7
 +
| Out
 +
| Out
 +
| Out
 +
|-
 +
|}
 +
 
 +
== Drivers / Software Examples ==
 +
 
 +
* Any MCP23017 library should work with this card
 +
* Here's our tested code
 +
 
 +
=== Arduino ===
 +
 
 +
* [https://github.com/land-boards/lb-Arduino-Code/tree/master/libraries/LandBoards_MCP23017 LandBoards MCP23017]
 +
** pinMode(uint8_t bit, uint8_t value) - Set bits 0-7=Input, 8-15=Output
 +
** readGPIOA() - Read the 8 Switches
 +
** writeOLATB(uint8_t baData) _ Write the 8 LEDs
 +
** digitalRead(uint8_t bit) - read a single Switch (bit=0-7)
 +
** digitalWrite(uint8_t bit, uint8_t wrVal) - write a single LED (nit=8-15)
 +
* [https://github.com/land-boards/lb-Arduino-Code/blob/master/LBCards/SWLED8X/SWLEDX8_01/SWLEDX8_01.ino SWLEDX8_01.ino] - Read 8 Switches, Write 8 LEDs
 +
** [https://github.com/land-boards/lb-Arduino-Code/tree/master/LBCards/ArduinoInABox/AiBMenu Example running on Arduino in a Box]
 +
 
 +
=== MicroPython Drivers ===
 +
 
 +
==== ESP32 MicroPython Driver ====
 +
 
 +
* [https://github.com/land-boards/lb-Python-Code/tree/master/MicroPython/ESP32/libraries/mcp23017 ESP32 MicroPython Driver]
 +
 
 +
==== PyBoard MicroPython Driver ====
 +
 
 +
* [https://github.com/land-boards/lb-Python-Code/blob/master/MicroPython/PyBoard%20Clone/libraries/mcp23017/mcp23017.py PyBoard MicroPython Driver]
 +
 
 +
==== CircuitPython ====
 +
 
 +
* [https://github.com/land-boards/lb-boards/blob/master/Projects/QTPy/Land%20Boards/Land%20Boards%20QT%20Py%20Code/SWLEDX8.py SWLEDX8.py] = Control the card
 +
 
 +
=== Raspberry Pi Pico ===
 +
 
 +
==== MMBASIC ====
 +
 
 +
* [https://github.com/land-boards/RasPiPico/blob/main/PicoMite_MMBASIC/PicoMite_VGA/Land%20Boards%20BASIC%20Programs/SWLEDX8-01.bas SWLEDX8-01.bas] - Read 8x switches, write 8x LEDs
 +
* [https://github.com/land-boards/RasPiPico/blob/main/PicoMite_MMBASIC/PicoMite_VGA/Land%20Boards%20BASIC%20Programs/lbcards/GPIO16-02.bas MMBASIC Example Code] - Bounce a bit across the 16-bits (not for use with [[SWLEDX8]] card)
 +
* [https://github.com/land-boards/RasPiPico/blob/main/PicoMite_MMBASIC/PicoMite_VGA/Land%20Boards%20BASIC%20Programs/lbcards/swledx8-03.bas swledx8-03.bas] - Write alternating pattern to LEDs then read/write switches to LEDs
 +
 
 +
=== I2C VHDL Code ===
 +
 
 +
* [https://github.com/douggilliland/MultiComp/tree/master/MultiComp%20(VHDL%20Template)/Components/I2C I2C VHDL Code]
 +
 
 +
== Mechanicals ==
 +
 
 +
[[File:SWLEDX8-I2C-MECHS(REV2).PNG]]
 +
 
 +
== Versions ==
 +
 
 +
=== Rev 2 ===
 +
 
 +
* '''Not''' functionally the same as Rev X1
 +
** Flips the data bits to match the [[SWLEDX8]] card
 +
*** Programs can read/write in bytes (no shuffling of bits needed)
 +
* Change resistors from SMT (0805) to through hole (1/8W)
 +
* Adds silkscreen Front/Rear
 +
* Added test block to rear
 +
* Moves "Rev 2" silkscreen to rear
 +
 
 +
=== Rev X1 ===
 +
 
 +
* Words, no issues
 +
 
 +
== Assembly Sheet ==
 +
 
 +
* [[SWLEDX8-I2C Rev 2 Assembly Sheet]]
 +
* [[SWLEDX8-I2C Rev X1 Assembly Sheet]]

Latest revision as of 10:35, 21 June 2022

SWLEDX8-I2C-P119-Orth-720px.JPG

Features

  • 16-Bit Digital I/O card with a small form factor
  • Card can be used standalone or stacked together with the SWLEDX8 card
  • I2C Daisy-Chain (In/Out) connectors
  • (3) I2C Address select jumpers for up to 8 devices per I2C bus
  • SCL/SDA termination jumpers
  • 2x10 pins Digital I/O Header
    • 16 digital pins
    • 2 power, 2 ground pins
  • 59mmx38mm
  • (4) #4-40 mounting holes
  • Software Drivers

Build Options

  • There are a number of options for using the card
    • Stacked option with SWLEDX8 card
    • Small footprint option
    • Low height/profile option

Stacked option with SWLEDX8 card

  • SWLEDX8 card mounts above this card
  • Pins can be directly mounted to both cards or male/female connector pairs can be used

SWLEDX8-I2C FRONT(DOWN) REV2.png

Small footprint option

SWLEDX8-I2C FRONT(STRT) REV2.png

Low height/profile option

SWLEDX8-I2C FRONT(RT ANGL) REV2.png

Rear Side Marking

SWLEDX8-I2C REAR(STRT) REV2.png

Connectors

  • Connectors are as follows

SWLEDX8-I2C-CAD(REV2).PNG

P1 - GPIO Pins

SWLEDX8-I2C P1A.PNG

Connections to SWLEDX8 Card

  • When paired with SWLEDX8
    • MCP23017 Port A connects to SWITCHES 0-7 on SWLEDX8
    • MCP23017 Port B connects to LEDs 0-7 on SWLEDX8
  • Board Rev 2 reverses bit order for byte transfers can be used

SWLEDX8-I2C P1.PNG

P2 - I2C Interface

SWLEDX8-I2C P2A.PNG

  • 2X5 header
  • Pinout
  1. GND
  2. VCC
  3. SDA
  4. SCL
  5. INTA

SWLEDX8-I2C P2.PNG

P3 - I2C Terminators / I2C Address Offset Jumpers

SWLEDX8-I2C P3A.PNG

  • Install left 2 jumpers to terminate I2C bus
    • Typically, the "last" card in a chain
  • Install right 3 jumpers for I2C base address offset in range 0x20 (all installed) to 0x27 (all removed)

SWLEDX8-I2C P3.PNG

I2C Address J3(A2) J3(A1) J3(A0)
0x0 In In In
0x1 In In Out
0x2 In Out In
0x3 In Out Out
0x4 Out In In
0x5 Out In Out
0x6 Out Out In
0x7 Out Out Out

Drivers / Software Examples

  • Any MCP23017 library should work with this card
  • Here's our tested code

Arduino

  • LandBoards MCP23017
    • pinMode(uint8_t bit, uint8_t value) - Set bits 0-7=Input, 8-15=Output
    • readGPIOA() - Read the 8 Switches
    • writeOLATB(uint8_t baData) _ Write the 8 LEDs
    • digitalRead(uint8_t bit) - read a single Switch (bit=0-7)
    • digitalWrite(uint8_t bit, uint8_t wrVal) - write a single LED (nit=8-15)
  • SWLEDX8_01.ino - Read 8 Switches, Write 8 LEDs

MicroPython Drivers

ESP32 MicroPython Driver

PyBoard MicroPython Driver

CircuitPython

Raspberry Pi Pico

MMBASIC

I2C VHDL Code

Mechanicals

SWLEDX8-I2C-MECHS(REV2).PNG

Versions

Rev 2

  • Not functionally the same as Rev X1
    • Flips the data bits to match the SWLEDX8 card
      • Programs can read/write in bytes (no shuffling of bits needed)
  • Change resistors from SMT (0805) to through hole (1/8W)
  • Adds silkscreen Front/Rear
  • Added test block to rear
  • Moves "Rev 2" silkscreen to rear

Rev X1

  • Words, no issues

Assembly Sheet

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