5
dc2260af
DEMO MANUAL DC2260A
GUI STARTUP
Figure 2 is the initial start-up screen that appears when
the program is launched. Once power is supplied to the
board from a stack of cells or a power supply, the com-
munication between the PC and the board can be checked.
1. Set Device Mode
Click the command button labeled READ CONFIG. If all
is properly connected and operating, the start-up default
configuration of the LTC6811-2 will be read from the
board. The Hex codes for the six bytes of configuration
setting will appear in the CONFIGURATION REGISTERS
section in the boxes labeled CONFIGURATION READ FROM
LTC6804/6811-2. The initial configuration bytes should be
0xD8 for register 0 and 0x00 for the other five bytes. This
default configuration is the sleep mode for the LTC6811-2
on DC2260A.
The LTC6811 calculates a 15-bit Packet Error Code,
PEC15, as a 16-bit word and appends it to the data stream
each time it sends out data. For the six bytes sent by this
command and received by the GUI, the control program
calculates a PEC15 in the same manner. This 16-bit word
is compared with the appended received 16-bit word to
check that the data transmission was properly executed.
The received PEC15 word and the calculated PEC15 word
from the received data are displayed in the top section
labeled PACKET ERROR CODE 15-BIT and both words
should match. The oval located at the top of the color-
coded status panel for the one board will turn green if
the PEC15 words match. Data transmission errors will
produce red warning indications when the PEC15 words
do not match. There is also a display of the PEC15 that
was sent with the most recent command to the LTC6811.
3. Write Configuration
Nothing is changed within the LTC6811 until the Write
Configuration command is executed. Clicking the WRITE
CONFIG command button sends the command and then the
six Hex bytes shown in the CONFIGURATION REGISTERS
section in the boxes labeled CONFIGURATION WRITTEN
TO LTC6804/6811-2 will become bold type. Software
developers can note the exact hex values required by the
LTC6811 for specific conditions in these boxes to facilitate
their control program development.
OPERATING THE CONTROL SCREEN
Click the Device Select menu, upper left of the GUI, then
click LTC6804/6811-2 Addressable to set the correct GUI
mode. Additional controls will appear and the upper right
GUI label will display LTC6804/6811-2.
2. Read Configuration
