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ftditest [2010/08/06 16:56] ladyada |
ftditest [2016/01/28 18:05] (current) |
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{{:ftdi:5vtest.jpg|}} | {{: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|}} | {{: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 | 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 ===== | ||
+ | FTDI cable has nothing attached to it | ||
- | ====== Test CTS ====== | + | {{: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|}} | {{: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 | ||
+ |