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moodlamp_hardware-debugging [2010/04/08 14:24] – Missing color/permanant flashing martin | moodlamp_hardware-debugging [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1 | ||
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- | ====== Test 1: short circuit ====== | ||
- | Test for short between 5V and Ground: | ||
- | |||
- | Switch your Multimeter to " | ||
- | You could also youse the Resistance Measurement of your Multimeter, you should measure a rather high Resistance. | ||
- | If you have a short look closely at your PCB an find the short! As soon you have no short it is safe to connect your moodlamp to the Power Supply. | ||
- | |||
- | ====== Test 2: USB Chip ====== | ||
- | Test the USB Connection. | ||
- | |||
- | Connect the moodlamp to your USB Port on your Linux Machine. Don't connect the Power Supply. Don't set the USBPWR Jumper. | ||
- | As a result the USB IC4 FT232RL get's Power from the USB Port but the rest of the circuit is dormant. | ||
- | The IC4 FT232RL is known by the Linux Kernel. | ||
- | |||
- | Execute **tail -f / | ||
- | < | ||
- | Apr 7 22:02:36 big32 kernel: [104624.674498] usb 1-3: new full speed USB device using ohci_hcd and address 3 | ||
- | Apr 7 22:02:36 big32 kernel: [104624.852065] usb 1-3: configuration #1 chosen from 1 choice | ||
- | Apr 7 22:02:36 big32 kernel: [104624.852318] ftdi_sio 1-3:1.0: FTDI USB Serial Device converter detected | ||
- | Apr 7 22:02:36 big32 kernel: [104624.852379] ftdi_sio: Detected FT232RL | ||
- | Apr 7 22:02:36 big32 kernel: [104624.852469] usb 1-3: FTDI USB Serial Device converter now attached to ttyUSB0 | ||
- | Apr 7 22:02:36 big32 kernel: [104624.856573] usb 1-3: New USB device found, idVendor=0403, | ||
- | Apr 7 22:02:36 big32 kernel: [104624.856582] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 | ||
- | Apr 7 22:02:36 big32 kernel: [104624.856590] usb 1-3: Product: FT232R USB UART | ||
- | Apr 7 22:02:36 big32 kernel: [104624.856595] usb 1-3: Manufacturer: | ||
- | Apr 7 22:02:36 big32 kernel: [104624.856600] usb 1-3: SerialNumber: | ||
- | </ | ||
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- | Make sure you get no "USB disconnect" | ||
- | |||
- | if you unplug the moodlamp you should see: | ||
- | < | ||
- | Apr 7 22:04:10 big32 kernel: [104731.095092] usb 1-3: USB disconnect, address 3 | ||
- | Apr 7 22:04:10 big32 kernel: [104731.095092] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0 | ||
- | Apr 7 22:04:10 big32 kernel: [104731.095092] ftdi_sio 1-3:1.0: device disconnected | ||
- | </ | ||
- | |||
- | ====== Missing color/ | ||
- | * Consider resoldering your LED-wires to the PCB. | ||
- | * Switch your Multimeter to " |