Flowire Software Upgrade Procedure

This is a step by step guide to upgrading the software in Flowire through the serial interface.

Requirements

• Windows PC
• TFTPS server, for example Tftpd32 or Tftpd64 by Ph. Jounin (http://tftpd32.jounin.net)
• Telnet software, for example PuTTY by Simon Tatham (http://www.chiark.greenend.org.uk/~sgtatham/putty/)
• Simple network switch
• 2 Ethernet cables
• Special USB-Serial cable with JTAG connector
• Flowire unit
• Flowire power supply
• Software for the Flowire. Download here.

Create the special USB-Serial cable

• You need an USB to RS232 cable with 3,3V TTL level. For example: http://au.element14.com/ftdi/ttl-232r-3v3/connector-type-a/dp/1329311
• You also need a ribbon cable. Suggested type: http://no.farnell.com/harwin/m50-9011042/receptacle-to-dip-150mm-20way/dp/2289813
• Create an adapter cable to connect to the debug connector on Flowire:

Flowire cable

• On the Flowire, you must connect to these pins:
  • 7: GND
  • 8: UART1_TX – Connect this to Rx on the serial cable
  • 16: UART1_RX – Connect this to Tx on the serial cable

Flowire pinning

PC setup

• Set static IP address 169.254.1.2 on your PC

Set static IP address 169.254.1.2 on your PC

• Connect the USB-Serial cable
• Check the Windows "Device Manager" to see which serial port it chooses. It will be listed under “Ports (COM % LPT)” as USB Serial COM port #x, where x represents the COM port number. Double click it and change the port settings from 9600 baud to 115200 baud.

TFTP server setup

• Start the Tftpd
• From the main window browse to the folder where the software files are kept. Choose the PC LAN port as the server interface:

TFTP server setup

Physical setup

• Do not connect the power supply to the Flowire unit yet
• Take of the top lid of the Flowire by unscrewing the two screws
• Locate the JTAG and connect the cable, cable pointing away from the PCB
• Connect the PC to the switch using a LAN cable.
• Connect the Flowire to the switch using a LAN cable