Difference between revisions of "Serial Console Access on B3"
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Author: PA | Author: PA | ||
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Gaining access to the serial console on B3 is neccessary if you would like to access u-boot to modify any boot parameters or to gain access without a working network.<br> | Gaining access to the serial console on B3 is neccessary if you would like to access u-boot to modify any boot parameters or to gain access without a working network.<br> | ||
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*Connect the USB cable to your PC | *Connect the USB cable to your PC | ||
*Open your favorite serial communication program (e.g. PuTTY) | |||
*Find out what your system called the USB cable (e.g., COM1, /dev/ttyUSB0) | |||
*Set the speed/baud rate to 115200. | |||
*Connect! | |||
Latest revision as of 13:23, 26 November 2011
Author: PA
Gaining access to the serial console on B3 is neccessary if you would like to access u-boot to modify any boot parameters or to gain access without a working network.
B3 has the a serial port onboard, but is normally used only for test purposes. The serial port is 3.3V logic, so to connect it to a regular PC port the RS232 drivers would be needed outside B3.
However, FTDI has a USB->3.3V-TTL cable that can be used (TTL-232RG-VREG3V3-WE), it can be bought at various places, one is mouser.com:
On this cable the following should be connected to B3:
Orange cable (PC TX data) -> UART0_RX, testpoint 65
Yellow cable (PC RX data) -> UART0_TX, testpoint 66
Black cable -> GND, Connect to one unused PCIe latch pad
See file for description of solder points.
In short the following needs to be done:
- Extract the main board from the aluminum casing
- Solder the three wires as described above
- Connect the USB cable to your PC
- Open your favorite serial communication program (e.g. PuTTY)
- Find out what your system called the USB cable (e.g., COM1, /dev/ttyUSB0)
- Set the speed/baud rate to 115200.
- Connect!