aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg43
-rw-r--r--Documentation/usb/misc_usbsevseg.txt46
2 files changed, 89 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg
new file mode 100644
index 000000000000..cb830df8777c
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-usb-devices-usbsevseg
@@ -0,0 +1,43 @@
1Where: /sys/bus/usb/.../powered
2Date: August 2008
3Kernel Version: 2.6.26
4Contact: Harrison Metzger <harrisonmetz@gmail.com>
5Description: Controls whether the device's display will powered.
6 A value of 0 is off and a non-zero value is on.
7
8Where: /sys/bus/usb/.../mode_msb
9Where: /sys/bus/usb/.../mode_lsb
10Date: August 2008
11Kernel Version: 2.6.26
12Contact: Harrison Metzger <harrisonmetz@gmail.com>
13Description: Controls the devices display mode.
14 For a 6 character display the values are
15 MSB 0x06; LSB 0x3F, and
16 for an 8 character display the values are
17 MSB 0x08; LSB 0xFF.
18
19Where: /sys/bus/usb/.../textmode
20Date: August 2008
21Kernel Version: 2.6.26
22Contact: Harrison Metzger <harrisonmetz@gmail.com>
23Description: Controls the way the device interprets its text buffer.
24 raw: each character controls its segment manually
25 hex: each character is between 0-15
26 ascii: each character is between '0'-'9' and 'A'-'F'.
27
28Where: /sys/bus/usb/.../text
29Date: August 2008
30Kernel Version: 2.6.26
31Contact: Harrison Metzger <harrisonmetz@gmail.com>
32Description: The text (or data) for the device to display
33
34Where: /sys/bus/usb/.../decimals
35Date: August 2008
36Kernel Version: 2.6.26
37Contact: Harrison Metzger <harrisonmetz@gmail.com>
38Description: Controls the decimal places on the device.
39 To set the nth decimal place, give this field
40 the value of 10 ** n. Assume this field has
41 the value k and has 1 or more decimal places set,
42 to set the mth place (where m is not already set),
43 change this fields value to k + 10 ** m. \ No newline at end of file
diff --git a/Documentation/usb/misc_usbsevseg.txt b/Documentation/usb/misc_usbsevseg.txt
new file mode 100644
index 000000000000..0f6be4f9930b
--- /dev/null
+++ b/Documentation/usb/misc_usbsevseg.txt
@@ -0,0 +1,46 @@
1USB 7-Segment Numeric Display
2Manufactured by Delcom Engineering
3
4Device Information
5------------------
6USB VENDOR_ID 0x0fc5
7USB PRODUCT_ID 0x1227
8Both the 6 character and 8 character displays have PRODUCT_ID,
9and according to Delcom Engineering no queryable information
10can be obtained from the device to tell them apart.
11
12Device Modes
13------------
14By default, the driver assumes the display is only 6 characters
15The mode for 6 characters is:
16 MSB 0x06; LSB 0x3f
17For the 8 character display:
18 MSB 0x08; LSB 0xff
19The device can accept "text" either in raw, hex, or ascii textmode.
20raw controls each segment manually,
21hex expects a value between 0-15 per character,
22ascii expects a value between '0'-'9' and 'A'-'F'.
23The default is ascii.
24
25Device Operation
26----------------
271. Turn on the device:
28 echo 1 > /sys/bus/usb/.../powered
292. Set the device's mode:
30 echo $mode_msb > /sys/bus/usb/.../mode_msb
31 echo $mode_lsb > /sys/bus/usb/.../mode_lsb
323. Set the textmode:
33 echo $textmode > /sys/bus/usb/.../textmode
344. set the text (for example):
35 echo "123ABC" > /sys/bus/usb/.../text (ascii)
36 echo "A1B2" > /sys/bus/usb/.../text (ascii)
37 echo -ne "\x01\x02\x03" > /sys/bus/usb/.../text (hex)
385. Set the decimal places.
39 The device has either 6 or 8 decimal points.
40 to set the nth decimal place calculate 10 ** n
41 and echo it in to /sys/bus/usb/.../decimals
42 To set multiple decimals points sum up each power.
43 For example, to set the 0th and 3rd decimal place
44 echo 1001 > /sys/bus/usb/.../decimals
45
46