|
@@ -17,37 +17,36 @@
|
|
|
*/
|
|
|
|
|
|
/*
|
|
|
-Driver: 8255
|
|
|
-Description: generic 8255 support
|
|
|
-Devices: [standard] 8255 (8255)
|
|
|
-Author: ds
|
|
|
-Status: works
|
|
|
-Updated: Fri, 7 Jun 2002 12:56:45 -0700
|
|
|
-
|
|
|
-The classic in digital I/O. The 8255 appears in Comedi as a single
|
|
|
-digital I/O subdevice with 24 channels. The channel 0 corresponds
|
|
|
-to the 8255's port A, bit 0; channel 23 corresponds to port C, bit
|
|
|
-7. Direction configuration is done in blocks, with channels 0-7,
|
|
|
-8-15, 16-19, and 20-23 making up the 4 blocks. The only 8255 mode
|
|
|
-supported is mode 0.
|
|
|
-
|
|
|
-You should enable compilation this driver if you plan to use a board
|
|
|
-that has an 8255 chip. For multifunction boards, the main driver will
|
|
|
-configure the 8255 subdevice automatically.
|
|
|
-
|
|
|
-This driver also works independently with ISA and PCI cards that
|
|
|
-directly map the 8255 registers to I/O ports, including cards with
|
|
|
-multiple 8255 chips. To configure the driver for such a card, the
|
|
|
-option list should be a list of the I/O port bases for each of the
|
|
|
-8255 chips. For example,
|
|
|
-
|
|
|
- comedi_config /dev/comedi0 8255 0x200,0x204,0x208,0x20c
|
|
|
-
|
|
|
-Note that most PCI 8255 boards do NOT work with this driver, and
|
|
|
-need a separate driver as a wrapper. For those that do work, the
|
|
|
-I/O port base address can be found in the output of 'lspci -v'.
|
|
|
-
|
|
|
-*/
|
|
|
+ * Driver: 8255
|
|
|
+ * Description: generic 8255 support
|
|
|
+ * Devices: [standard] 8255 (8255)
|
|
|
+ * Author: ds
|
|
|
+ * Status: works
|
|
|
+ * Updated: Fri, 7 Jun 2002 12:56:45 -0700
|
|
|
+ *
|
|
|
+ * The classic in digital I/O. The 8255 appears in Comedi as a single
|
|
|
+ * digital I/O subdevice with 24 channels. The channel 0 corresponds
|
|
|
+ * to the 8255's port A, bit 0; channel 23 corresponds to port C, bit
|
|
|
+ * 7. Direction configuration is done in blocks, with channels 0-7,
|
|
|
+ * 8-15, 16-19, and 20-23 making up the 4 blocks. The only 8255 mode
|
|
|
+ * supported is mode 0.
|
|
|
+ *
|
|
|
+ * You should enable compilation this driver if you plan to use a board
|
|
|
+ * that has an 8255 chip. For multifunction boards, the main driver will
|
|
|
+ * configure the 8255 subdevice automatically.
|
|
|
+ *
|
|
|
+ * This driver also works independently with ISA and PCI cards that
|
|
|
+ * directly map the 8255 registers to I/O ports, including cards with
|
|
|
+ * multiple 8255 chips. To configure the driver for such a card, the
|
|
|
+ * option list should be a list of the I/O port bases for each of the
|
|
|
+ * 8255 chips. For example,
|
|
|
+ *
|
|
|
+ * comedi_config /dev/comedi0 8255 0x200,0x204,0x208,0x20c
|
|
|
+ *
|
|
|
+ * Note that most PCI 8255 boards do NOT work with this driver, and
|
|
|
+ * need a separate driver as a wrapper. For those that do work, the
|
|
|
+ * I/O port base address can be found in the output of 'lspci -v'.
|
|
|
+ */
|
|
|
|
|
|
/*
|
|
|
This file contains an exported subdevice for driving an 8255.
|