Difference between revisions of "Rock/ir"

Revision as of 05:24, 29 January 2014

English

Kernel Level

The IR driver only supports NEC Encode format. Below is the instructions of how to add you IR remote to send the right key code in Linux kernel.

There is just one file related "kernel/drivers/input/remotectl/rkxx_remotectl.c"

Do as follows

1、Add an array as follow:

static struct rkxx_remote_key_table remote_key_table_41C8[] = {
{0x38, KEY_VOLUMEUP},
{0xb8, KEY_VOLUMEDOWN},
{0x58, KEY_MENU},
{0xd0, KEY_REPLY},
{0x48, KEY_BACK},
{0x98, KEY_BACK},
{0x50, KEY_UP},
{0x30, KEY_DOWN},
{0xc8, KEY_LEFT},
{0xc0, KEY_RIGHT},
{0x40, KEY_REPLY},
{0x80, KEY_SEARCH},
};

The first column is the IR key value,the second column is the corresponding key code.

2、Add one item in

  static struct rkxx_remotectl_button remotectl_button[]

For example：

    {
        .usercode = 0x41c8, /* need to get the usercode in next step */
        .nbuttons = 12,    /* number of buttons */
        .key_table = &remote_key_table_41C8[0], /* key table */
    },

The first is usercode, every IR has a usercode; the second is the number of buttons, the third is the address of the array we added in the 1st step.

1. How to get the usercode and IR key value ##

In the remotectl_do_something func

       case RMC_USERCODE:
        {
            ddata->scanData <<= 1;
            ddata->count ++;
            if ((TIME_BIT1_MIN < ddata->period) && (ddata->period < TIME_BIT1_MAX)){
                ddata->scanData |= 0x01;
            }
            if (ddata->count == 0x10){//16 bit user code
               // printk("u=0x%x\n",((ddata->scanData)&0xFFFF));                if (remotectl_keybdNum_lookup(ddata)){
                    ddata->state = RMC_GETDATA;
                    ddata->scanData = 0;
                    ddata->count = 0;
                }else{
                   ddata->state = RMC_PRELOAD;
                }
            }
        }

Uncomment the printk code to get the usercode,then add remotectl_button array with the usercode and the buttons number

       case RMC_GETDATA:
       {
            ddata->count ++;
            ddata->scanData <<= 1;
            if ((TIME_BIT1_MIN < ddata->period) && (ddata->period < TIME_BIT1_MAX)){
                ddata->scanData |= 0x01;
            }	
            if (ddata->count == 0x10){
               // printk(KERN_ERR "d=%x\n",(ddata->scanData&0xFFFF));                if ((ddata->scanData&0x0ff) == ((~ddata->scanData >> 8)&0x0ff)){
                    if (remotectl_keycode_lookup(ddata)){
                        ddata->press = 1;
                                         ...
                                          }
                                       ...
                                     }
                                  ...
                              }
                     }

Uncomment the printk code ,you can get the IR key value

Note:

The printk output is in hex(0x) format, the first two number is we needed ,the last two number is just used for checking, we can ignore it.
Don't leave much printing log in code, it will make in the ir not work.

@@ Line 103: / Line 103: @@
 Note:
-# you will get four number in hex(0x) format, the first two number is we needed ,the last two number is just used for check!
+# The printk output is in hex(0x) format, the first two number is we needed ,the last two number is just used for checking, we can ignore it.
+# Don't leave much printing log in code, it will make in the ir not work.
-# Don't leave much log in code,too much log will result in the ir doesn't work.
 == Android Key Remapping ==

Difference between revisions of "Rock/ir"

Revision as of 05:24, 29 January 2014

Contents

Kernel Level

Android Key Remapping