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How to recover an unflashable MSB A2
This HOWTO may help your bring a unflashable MSB-A2 flashable
You need a tool to configure the FTDI chip (for Linux: http://rtr.ca/ft232r/, for Windows MProg from [http://www.ftdichip.com/Support/Utilities.htm]) and a terminal program like (HTerm)[http://www.der-hammer.info/terminal/] that lets you control the RTS/CTS lines.
ft232r_prog --invert_rts
First step to reprogram the FTDI232R:
- Tools->Read and parse
- File->Save As bla.ept
- File->Edit
to prevent the MSB-A2 from running user application your have to program the "Device Type" FT232R lowering the RTS line on poweron (uncheck the "Invert RTS#" box in the "Invert RS232 Signals" -Tab). If the checkbox "Load D2XX driver is not yet checked please download and install the D2XX-Driver . (if it does not work with the standard VCP driver) Device->Program
Now connect the device (115200 8N1), try input something and watch the output. If the output corresponds with the input the baudrate is correct. If not, try lowering this value until the connection is correct. Then activate RTS. Let's speak a little bit "bootloader" (maybe a ASCII table is useful).
comand response comment
================================================================================
"?"CRNL "Synchronized"CRNL
"Synchronized"CRNL "Synchonized"CRNL"OK"CRNL
"16000"CRNL "16000"CRNL"OK"CRNL
"J"CRNL "J"CRNL"0"CRNL"402716981"CRNL LPC2387 (500k)
"U 23130"CRNL "U 23130"CRNL"0"CRNL unlocked
"P 0 0"CRNL "P 0 0"CRNL"0"CRNL prepare block 0 0
"E 0 0"CRNL "E 0 0"CRNL"0"CRNL erase block 0 0
"P 1 1"CRNL "P 1 1"CRNL"0"CRNL prepare block 1 1
"E 1 1"CRNL "E 1 1"CRNL"0"CRNL erase block 1 1
and so on. Usually, erasing the first block should be enough.
Finally you should be able to flash the MSB-A2 node. It is important to program the FTDI232R with the initially saved settings, especially enable the "Invert RTS"-checkbox (or run ft232r_prog --invert_rts again)!