Changes between Version 3 and Version 4 of Docs/Prog/Manual/DeviceSupport

Timestamp:

11/30/09 10:29:41 (15 years ago)

Author:

Don Wilson

Comment:

--

Docs/Prog/Manual/DeviceSupport

@@ -3 +3 @@
 = Device Support =
 
+== Device Drivers ==
+
+=== Overview ===
+For testing some device drivers may be loaded or unloaded dynamically or a startup script may be used to automatically load the modules.
+
+||'''Driver'''||'''Module Filename'''||'''Device Nodes'''||'''Depends on other modules'''||
+||Mainboard communications||mnbd-comm.ko||/dev/mnbd[[BR]]/dev/wt1 ..[[BR]][[BR]]/dev/wt10||||
+||USB Hub||isp1520.ko||||i2c-mcf, i2c-core||
+||Keypad/Beeper||max734x.ko||/dev/cardbeep||I2c-mcf, i2c-core||
+
+Device driver operation may be tested from command line for some functions, for example:
+
+{{{
+# echo “A,B,C” > /dev/cardbeep <CR>
+}}}
+Play notes A, B, and C on beeper. ''(refer to beeper section for more details)''
+
+{{{
+# echo “W” > /dev/wt1 <CR>
+}}}
+Request weight from scale one.
+
+{{{
+# cat < /dev/wt1 <CR>
+}}}
+Display response to previous request from scale 1 as a weight structure converted to hexadecimal.
+
+{{{
+#!Lineno
+#!c
+01004812B682000000004812B6820003
+
+struct mnbd_wt_struct
+{
+  unsigned char interval;          (01 – interval 1)
+  unsigned char decimal;           (00 – no decimal)
+  float grosswt;                   (4812B682 – IEEE floating point value)
+  float tarewt;                    (00000000 – IEEE floating point value–tare zero)
+  float netwt;                     (4812B682 – IEEE floating point value)
+  unsigned char units;             (00 – units)
+  unsigned char status;            (03 – status)
+};
+}}}
+
+[[Top]]