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BUF20800/20820EVM Software Overview
Figure 15 shows an error that pops up if the computer cannot communicate with the EVM. If you receive
this error, first check to see that the USB cable is properly connected on both ends. This error can also
occur if you connect the USB cable before the USB_DIG_Platform power source. Another possible source
for this error is a problem with your PC USB Human Interface Device driver. Make sure that the device is
recognized when the USB cable is plugged in; recognition is indicated by a Windows-generated
confirmation sound.
Figure 15. BUF20800/20820EVM Software: Communication Error with the USB_DIG_Platform
5.2 Using the BUF20800/20820 Software
5.2.1 I
2
C Address Selection
As mentioned previously in the BUF20800/20820EVM Features section (see Section 3.7 ), jumper JMP6 is
used to set the I
2
C address pin of the BUF20800/20820 . Figure 16 shows how the hardware and software
must both be set to allow for communication between the BUF20800/20820EVM and the software.
Without jumper JMP6 and the software address button configured correctly, the software will not be able
to communicate with the BUF20800/20820 device.
Figure 16. Software Setting for JMP6 Low
When JMP6 is set high and the software is set as shown in Figure 17 , the second I
2
C address can be
configured.
Figure 17. Software Setting for JMP6 High
19 SBOU100 – April 2011 BUF20800/20820EVM User Guide and Software Tutorial
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