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XScopes
User’s Manual
DS-XScopes-3.5
– December, 2014
Page | 24
3.5
Parallel Decoding
Shows the hexadecimal value of the 8 bit digital input lines. The hexadecimal
number is shown below the last digital trace. If all the 8 digital traces are enabled,
then there is no space to show the parallel decoding. Figure 48 shows an example
of the parallel decoding with 4 logic lines enabled.
3.6
Serial Decoding
Shows the hexadecimal value of the stream of bits on each channel. The
decoding starts at the first vertical cursor and ends at the second vertical cursor,
8 bits are decoded. If the cursors are disabled, then the decoding is done from the
start of the screen, to the end. The data can be decoded MSB first or LSB first,
depending on the position of the first vertical cursor.
3.7
Protocol Sniffer
When the XScope is in Sniffer mode and before any data is received, a brief
text appears on the screen to indicate where to hook up the signals. As soon as
data is received, the data is displayed in "pages". There are 16 pages of data.
To browse thru the pages, use the buttons K2 and K3. To stop and start the sniffer,
press the K1 button. Figure 50 shows the device in sniffer mode.
In the UART and SPI sniffers, the data can be displayed in HEX or ASCII, press
K2 and K3 simultaneously to toggle between them.
When the ASCII mode is enabled:
-
Only codes 0x0A, 0x0D and 0x20 thru 0x7A will show valid characters.
-
More information fits the screen but the size of the buffer is the same:
The data on each page will double and the number of pages is halved.
Figure 51 shows the 3x6 font.
3.8
Sniffers Modes
Normal
mode: Continuous operation, when the buffer is filled, all pages are erased, the index goes back to page 1
Single
mode: The sniffer will stop when the buffer is filled.
Circular
mode: New data will be placed at the end of the last page, older data will be shifted towards the first
page. At the beginning, the device will show 0x00 an all pages, and the last page will be set. The circular mode is
useful if you are only interested in the most recent data received.
Figure 48: Parallel Decoding
Figure 49: Serial Decoding
Figure 51: Small 3x6 font (characters 0x20 thru 0x7A)
Figure 50: Sniffer
Summary of Contents for XScopes
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