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Both sides previous revision Previous revision Next revision | Previous revision | ||
ftditest [2010/08/06 17:14] ladyada |
ftditest [2016/01/28 18:05] (current) |
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If test voltages are not 5V and 3.3V, the cable is bad | If test voltages are not 5V and 3.3V, the cable is bad | ||
- | ====== Communication test ====== | + | ====== Install software ====== |
Download X-CTU: http://ftp1.digi.com/support/utilities/40002637_c.exe | Download X-CTU: http://ftp1.digi.com/support/utilities/40002637_c.exe | ||
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Click on **TERMINAL** tab | Click on **TERMINAL** tab | ||
- | ====== Test RX and TX ====== | + | ====== STEP 3: Test RX and TX ====== |
===== Test TX is not shorted to RX ===== | ===== Test TX is not shorted to RX ===== | ||
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If red text does not appear, cable is bad | If red text does not appear, cable is bad | ||
- | ====== Test CTS ====== | + | ====== STEP 4: Test CTS ====== |
We will test the CTS pin. Connect 100 ohm resistor between brown and red wires | We will test the CTS pin. Connect 100 ohm resistor between brown and red wires | ||
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{{:ftdi:xctuctslow.gif|}} | {{:ftdi:xctuctslow.gif|}} | ||
- | ====== Test RTS ====== | + | ====== STEP 5: Test RTS ====== |
===== RTS short test ===== | ===== RTS short test ===== | ||
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{{:ftdi:ftdiend.jpg?500|}} | {{:ftdi:ftdiend.jpg?500|}} | ||
- | Look at window, make sure RTS box is clicked and CTS is BLACK. | + | Look at window, make sure RTS box is clicked and CTS is BLACK. If CTS is green, cable is bad |
{{:ftdi:rtsshorttest.gif|}} | {{:ftdi:rtsshorttest.gif|}} | ||
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===== RTS function test ===== | ===== RTS function test ===== | ||
- | Put 100 ohm resistor between Yellow and Brown wires | + | Put 100 ohm resistor between Green and Brown wires |
- | {{:ftdi:ctsrts.jpg|}} | + | {{:ftdi:ctsrts.jpg?500|}} |
When RTS box is clicked, CTS box is GREEN | When RTS box is clicked, CTS box is GREEN | ||
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{{:ftdi:rtslow.gif|}} | {{:ftdi:rtslow.gif|}} | ||
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+ | If CTS box does not change color from black to green , cable is bad | ||
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+ | ===== Quit software ===== | ||
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+ | After each cable, quit software then unplug cable | ||
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