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ftditest [2010/08/06 16:56]
ladyada
ftditest [2010/10/13 17:42]
ladyada
Line 27: Line 27:
 {{:​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
Line 47: Line 49:
 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
 +
/home/ladyada/public_html/wiki/data/pages/ftditest.txt · Last modified: 2016/01/28 18:05 (external edit)