88 lines
1.8 KiB
Markdown
88 lines
1.8 KiB
Markdown
<!--
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---
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name: MDB2Pi HAT
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class: board
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type: IO,Power
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formfactor: HAT
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manufacturer: Abrantix
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description: Multi-Drop-Bus MDB Converter Board for the Raspberry Pi
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url: http://www.abrantix.com/MDBConverter.html
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buy: http://blog.abrantix.com/webshop/
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image: 'mdb2pi-hat.png'
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pincount: 40
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eeprom: yes
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power:
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'1':
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'2':
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'4':
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'17':
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ground:
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'6':
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'9':
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'14':
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'20':
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'25':
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'30':
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'34':
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'39':
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pin:
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'8':
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mode: UART
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'10':
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mode: UART
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'27':
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mode: i2c
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'28':
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mode: i2c
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i2c:
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'0x50':
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name: HAT EEPROM
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device: 24C32
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-->
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#MDB2Pi HAT
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The MDB2Pi HAT can serve as a MDB master or as a peripheral MDB Device for Vending Machines (VMC). It takes care of the MDB specific 9-bit format, electrical and timing constraints. It forwards the MDB payload to the Raspberry Pi UART using a simple serial protocol.
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The MDB2Pi HAT is powered from the MDB bus (10...42V regulated or unregulated supply) and backpowers the Raspberry Pi with up to 2.5A@5V. Thus no separate power supply is required for the pi.
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##Configuration
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Enable UART and HAT detection by adding the following lines to /boot/config.txt:
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```bash
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enable_uart=1
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dtparam=i2c_vc=on
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```
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disable serial console output:
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```bash
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sudo nano /boot/cmdline.txt
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```
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--> remove the "console=..." parameter
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##MDB Master and Cashless Device Demo:
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Install mono runtime:
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```bash
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sudo apt-get install mono-runtime
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```
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Get the Demo code:
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```bash
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wget https://secure.abrantix.com/downloads/MDBConverter/MDBConverter.zip
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unzip MDBConverter.zip
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```
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How to run the Master Demo:
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```bash
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cd MDBConverter
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mono MDBMasterSimulatorConsole.exe /dev/serial0 115200
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```
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How to run the Cashless Device Demo:
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```bash
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cd MDBConverter
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mono MDBCashlessDeviceSimulatorConsole.exe /dev/serial0 115200
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```
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Hint: On newer raspbian releases, the serial port is available as /dev/serial0 - older releases may use dev/ttyAMA0.
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