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This shows you the differences between two versions of the page.

--- ftditest [2010/08/06 16:22]
ladyada created
+++ ftditest [2016/01/28 18:05] (current)
@@ Line 27: / Line 27: @@
 {{:ftdi:5vtest.jpg|}}
-Test voltage between black and orange wires - it must be 3.3V
+Test voltage between black and orange wires - it must be 3.3V (NOT 5V)
 {{:ftdi:vcciotest.jpg|}}
-====== Communication test ======
+If test voltages are not 5V and 3.3V, the cable is bad
+====== Install software ======
 Download X-CTU: http://ftp1.digi.com/support/utilities/40002637_c.exe
+Install software
+Start up software
+{{:ftdi:xctucom.gif|}}
+Select the COM port that says **USB SERIAL PORT**
+{{:ftdi:xctuterm.gif|}}
+Click on **TERMINAL** tab
+====== STEP 3: Test RX and TX ======
+===== Test TX is not shorted to RX =====
+FTDI cable has nothing attached to it
+{{:ftdi:ftdiend.jpg?500|}}
+Type text into terminal window. All text should be blue. If red text appears, the cable is bad.
+{{:ftdi:txshorttest.gif|}}
+When done, click **Clear Screen**
+===== Test RX and TX =====
+Connect 100 ohm resistor between orange and yellow wires
+{{:ftdi:rxtx.jpg|}}
+Type text into terminal window, all characters will appear in blue AND red
+{{:ftdi:xcturxtx.gif|}}
+If red text does not appear, cable is bad
+====== STEP 4: Test CTS ======
+We will test the CTS pin. Connect 100 ohm resistor between brown and red wires
+{{:ftdi:ctshigh.jpg?500|}}
+On terminal, **CTS** box is black. If it is not black, cable is bad.
+{{:ftdi:xctuctshigh.gif|}}
+Now connect 100 ohm resistor between brown and black wires
+{{:ftdi:ctslow.jpg?500|}}
+On terminal, **CTS** box is green. If it is not green, cable is bad.
+{{:ftdi:xctuctslow.gif|}}
+====== STEP 5: Test RTS ======
+===== RTS short test =====
+FTDI cable has nothing attached to it
+{{:ftdi:ftdiend.jpg?500|}}
+Look at window, make sure RTS box is clicked and CTS is BLACK. If CTS is green, cable is bad
+{{:ftdi:rtsshorttest.gif|}}
+===== RTS function test =====
+Put 100 ohm resistor between Green and Brown wires
+{{:ftdi:ctsrts.jpg?500|}}
+When RTS box is clicked, CTS box is GREEN
+{{:ftdi:rtshigh.gif|}}
+When RTS box is not clicked, CTS box is BLACK
+{{:ftdi:rtslow.gif|}}
+If CTS box does not change color from black to green , cable is bad
+===== Quit software =====
+After each cable, quit software then unplug cable

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