softov / plcm_drv_v013 Goto Github PK

/*
 * Customer can modify the code we provided.
 * Lanner doesn't warrant the source code.
 */

/*
 * The Parallel LCM Driver - Comiple and Usage 
 */
Please make you had enable the Parallel Port in the BIOS.
If you can not "insmod" the Parallel LCM driver, you have
to check the setting in the BIOS first.

Please compile the source code in your Linux.
After compiled, you will have the binary files.
1. plcm_drv.o | plcm_drv.ko (Kernel mode driver module)
2. plcm_test (User mode driver testing program)
3. plcm_cursor_char (User mode driver testing program-for cursor shift & single text update)
4. ppdev_test (User mode linux kernel driver testing program.linux kernel driver is needed
   parport.ko,parport_pc.ko,ppdev.ko need to be loaded before runing this))
5. Test (User mode testing script)
Please run "Test" for testing the parallel LCM functions.

If you want to add the driver module into your Linux.
Please see the "Test" or "Makefile" first.
For exmaple:
You have to run "mknod /dev/plcm_drv c 248 0" to create the device file.

If you have any question or requirement, please contact with the sales. 


Note: insmod: error inserting 'plcm_drv.ko': -1 Input/output error
      please check major device number to whether repeat

/*
 * Release Note
 */

Version 0.1.3
1. ppdev_test support linux parport standard driver 

Version 0.1.2
1. correct the io-address detection method to solve an issue about some unit 
   can not get the right io-address.
2. make an error limitation to abort the PLCM command when the PLCM device is 
   not at present or it is bad.

Version 0.1.1
1.Correct the control sequence and timing setting in LCM_Command function 
  in plcm_drv.c
2.Add check busy, check address and check data process in file read and 
  write operations in plcm_drv.c
3.Correct the process of the PLCM_IOCTL_SHIFT_RL and PLCM_IOCTL_CLEARDISPLAY 
  ioctl requests in plcm_ioctl function in plcm_drv.c
4.Update the plcm_test.c for production requests in Lanner

Version 0.1.0
1.Change LCM driver major number to 248

Version 0.0.9
1.Change LCM driver major number to 250

Version 0.0.8
1.Add support to compatible with linux kernel version 3.1.X

Version 0.0.7
1.Add support to compatible linux kernel version over 2.6.36

Version 0.0.6
1.Modify the way of Keypad receive value(only detect Status port:bit 3 5 and 6,receive keypad value is C7,E7,EF and CF).

Version 0.0.5
1.Modify keypad value in plcm_test.c
  C7 ==> E6
  E7 ==> C6
  EF ==> CE
  CF ==> EE
2.Modify driver version to 0.0.5

Version 0.0.4
1. Set initail line to 1st line in code plcm_cursor_char.c 

Version 0.0.3
1. Support cursor shifting (cursor movement) and single text character update
2. Add plcm_cursor_char.c for testing sursor shifting and single text char update

Version 0.0.2
1. Support CGRAM initialize demo code and characters in the driver.
2. Support CGRAM test case demo code in the test application.

Version 0.0.1
1. Initial version.
2. Support the basic LCM commands.
3. Support the file read and write functions.
4. Support 2.4.x and 2.6.x in the Makefile.
5. Provide the use mode source code for test.
6. Automaticlly check the character device file in /dev by the Makefile. 
7. Automaticlly generate the test script in the Makefile.