Difference between revisions of "Rock/ir"
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| − | The first column is the IR key value,the second column is the corresponding key | + | The first column is the IR key value,the second column is the corresponding key code. |
2、Add one item in | 2、Add one item in | ||
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<syntaxhighlight lang="c"> | <syntaxhighlight lang="c"> | ||
{ | { | ||
| − | .usercode = 0x41c8, | + | .usercode = 0x41c8, /* need to get the usercode in next step */ |
| − | + | .nbuttons = 12, /* number of buttons */ | |
| − | + | .key_table = &remote_key_table_41C8[0], /* key table */ | |
}, | }, | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | The first is usercode, every IR has a usercode; the second is the | + | |
| − | the third is the | + | 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. |
| − | How to get the usercode and IR key value | + | ## How to get the usercode and IR key value ## |
| + | |||
In the '''remotectl_do_something''' func | In the '''remotectl_do_something''' func | ||
<syntaxhighlight lang="c" highlight="9"> | <syntaxhighlight lang="c" highlight="9"> | ||
Revision as of 05:21, 29 January 2014
Contents
The Radxa Rock comes with IR sensor(between the uSD card and USB otg port). This page describes how to use and configure the remote to work properly on RR. You can do this in two ways:
- Modify the IR kernel driver - low level hacking, working on Linux and Android since they are based the same kernel
- Modify the Android key mapping if you use android - user space hacking
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:
{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.
- 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:
- 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!
- Don't leave much log in code,too much log will result in the ir doesn't work.