Difference between revisions of "Front Panel For 8 Bit Computers"

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== Drivers ==
 
== Drivers ==
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 +
=== VHDL Driver ===
  
 
* [https://github.com/douggilliland/MultiComp/tree/master/MultiComp_On_RETRO-EP4CE15/FrontPanel01B VHDL code to control Front Panel autonomously] - Great for FPGA Retro-computers
 
* [https://github.com/douggilliland/MultiComp/tree/master/MultiComp_On_RETRO-EP4CE15/FrontPanel01B VHDL code to control Front Panel autonomously] - Great for FPGA Retro-computers
 
** Example: [https://github.com/douggilliland/MultiComp/tree/master/MultiComp_On_RETRO-EP4CE15/M6800_MIKBUG_FrontPanel01 6800 running MIKBUG using the Front Panel] - Run/Halt the CPU, Read SRAM, ROM, etc, Write to SRAM
 
** Example: [https://github.com/douggilliland/MultiComp/tree/master/MultiComp_On_RETRO-EP4CE15/M6800_MIKBUG_FrontPanel01 6800 running MIKBUG using the Front Panel] - Run/Halt the CPU, Read SRAM, ROM, etc, Write to SRAM
 +
 +
=== Arduino Driver ===
 +
 
* I2C parts are standard MCP23017 drivers which are supported in Arduino and most microprocessors
 
* I2C parts are standard MCP23017 drivers which are supported in Arduino and most microprocessors
 
** [https://www.arduino.cc/reference/en/libraries/mcp23017/ Arduino MCP23017 library]
 
** [https://www.arduino.cc/reference/en/libraries/mcp23017/ Arduino MCP23017 library]
 +
 +
=== Micro-Python ===
 +
 
* [https://github.com/land-boards/lb-Python-Code/blob/master/MicroPython/PyBoard%20Clone/libraries/mcp23017/mcp23017.py Micro-Python driver for MCP23017]
 
* [https://github.com/land-boards/lb-Python-Code/blob/master/MicroPython/PyBoard%20Clone/libraries/mcp23017/mcp23017.py Micro-Python driver for MCP23017]
 +
 +
=== C Code ===
 +
 
* C code driver - [https://github.com/douggilliland/Retro-Computers/tree/master/Z80/PSOC/PSOC_Design_Files/Z80-PSoC-3-Chips_002/Z80_3Chip.cydsn PSoC driver GitHub Repo]
 
* C code driver - [https://github.com/douggilliland/Retro-Computers/tree/master/Z80/PSOC/PSOC_Design_Files/Z80-PSoC-3-Chips_002/Z80_3Chip.cydsn PSoC driver GitHub Repo]
 
** [https://github.com/douggilliland/Retro-Computers/blob/master/Z80/PSOC/PSOC_Design_Files/Z80-PSoC-3-Chips_002/Z80_3Chip.cydsn/FrontPanel.c FrontPanel.c]
 
** [https://github.com/douggilliland/Retro-Computers/blob/master/Z80/PSOC/PSOC_Design_Files/Z80-PSoC-3-Chips_002/Z80_3Chip.cydsn/FrontPanel.c FrontPanel.c]

Revision as of 16:03, 20 June 2021

Tindie-mediums.png

Front Panel for 8-Bit Microprocessors

EightBitFrontPanel720px.JPG

Top row controls

Typical controls.

FrontPanel-01-Front-3D-controls.png

Features

It has these features. They may not fit your generic design. Especially since this card has to have an I2C interface.

  • 32 Pushbutton Switches
  • 32 LEDs
  • I2C interface (Two Wire interface - plus power and ground)
    • Jumper selectable base address
    • Occupies I2C addresses either 0x20-0x23 or 0x24-0x27
    • Jumper Selectable I2C terminators
  • I2C daisy-chain connector
    • Interrupt line
      • Can be configured to interrupt on button presses
      • MCP23017 need to be set to Open-Drain output - card has pull-up to Vcc
  • 4 MCP23017 16-bit I2C Port Expanders
    • These are fine pitch surface mount parts
  • 3.3V or 5V operation
  • Compatible form factor with RETRO-EP4CE15 and other cards
    • 95x95mm
    • 6-32 mounting holes

Connector

J2 - I2C Connector

  • Two row header on bottom of card
  • 5 pin in
  • 4 pin out (daisy-chain)
  1. GND
  2. VCC
  3. SDA
  4. SCL
  5. INT*

And

  1. GND
  2. VCC
  3. SDA
  4. SCL

Schematic

Drivers

VHDL Driver

Arduino Driver

  • I2C parts are standard MCP23017 drivers which are supported in Arduino and most microprocessors

Micro-Python

C Code

Assembly Sheet

Front Panel Assembly Sheet Rev 1

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