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But the ftdi dll seems to be able to access the usb blaster fine :
ftlstndev
1
ftgetdescriptions
USB-Blaster
ftopen 0
FTDI USB device 0 opened, Handle : 40973760
40973760
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Great. I haven't tried accessing a USB-Blaster under windows.
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But now I am not sure what will happen to any data I write to the handle
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Write some test code;
a) Toggle TCK, while keeping all other bits high, so according to the protocol:
0011_1111 b /* bit mode, don't read-back, OE + TDI + CS# + CE# + TCK high */
0011_1110 b /* drop TCK low */
So fill a write buffer with 3-bytes, i.e., 3Fh, 3Eh, 3Fh, and write it to the USB-Blaster.
Probe the TCK pin and you will see a ~1us low pulse on TCK.
Viola, you now have control of your USB-Blaster!
Cheers,
Dave
Honored Contributor
