这个文档主要说明在安卓上增加遥控器
硬件连接
IR_IN(红外遥控头输出) <-> GPIOAO_5(主芯片红外输入口)
安卓9软件配置
1） 对于vim3，common/arch/arm/boot/dts/amlogic/mesong12b.dtsi 中增加遥控器码值到键值的映射，使能遥控器驱动配置
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| remote:rc@0xff808040 {
compatible = "amlogic, aml_remote";
dev_name = "meson-remote";
reg = <0xff808040 0x44>, /*Multi-format IR controller*/
<0xff808000 0x20>; /*Legacy IR controller*/
status = "okay";
protocol = <REMOTE_TYPE_NEC>;
interrupts = <0 196 1>;
pinctrl-names = "default";
pinctrl-0 = <&remote_pins>;
map = <&custom_maps>;
max_frame_time = <200>; /*set software decoder max frame time*/
};
custom_maps:custom_maps {
mapnum = <1>;
map0 = <&map_0>;
map_0: map_0{
mapname = "khadas-ir";
customcode = <0xff00>;
release_delay = <80>;
fn_key_scancode = <0x5b>;
cursor_left_scancode = <0x0e>;
cursor_right_scancode = <0x1a>;
cursor_up_scancode = <0x03>;
cursor_down_scancode = <0x02>;
cursor_ok_scancode = <0x07>;
size = <13>; /*keymap size*/
keymap = <REMOTE_KEY(0x14, 116)
REMOTE_KEY(0x13,139)
REMOTE_KEY(0x03,103)
REMOTE_KEY(0x02,108)
REMOTE_KEY(0x0e,105)
REMOTE_KEY(0x1a,106)
REMOTE_KEY(0x07,232)
REMOTE_KEY(0x58,114)
REMOTE_KEY(0x5c,63)
REMOTE_KEY(0x5b,63)
REMOTE_KEY(0x0b,115)
REMOTE_KEY(0x01,158)
REMOTE_KEY(0x48,102)>;
};
};
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目前vim3/vim3l 安卓9平台只配置了khadas-ir的红外遥控，如果需要增加nec协议的遥控,可以在相同位置类似增加键值的映射，比如map1,map2,遥控器的客户码 等信息，最后 mapnum 增加1
2） 增加 android kl 文件
添加 device/khadas/kvim3/files/Vendor_0001_Product_0001.kl ,编译到/vendor/usr/keylayout目录
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| vi device/khadas/kvim3/files/Vendor_0001_Product_0001.kl
key 139 MENU
key 125 MENU
key 60 NOTIFICATION
key 127 SEARCH
key 217 SEARCH
key 228 POUND
key 227 STAR
key 231 CALL
key 61 CALL
key 97 DPAD_CENTER
key 232 DPAD_CENTER
key 108 DPAD_DOWN
key 103 DPAD_UP
key 102 HOME
key 105 DPAD_LEFT
key 106 DPAD_RIGHT
key 115 VOLUME_UP
key 114 VOLUME_DOWN
key 104 VOLUME_UP
key 109 VOLUME_DOWN
key 212 CAMERA
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遥控器键值查看
如果驱动和kl文件添加正确的话，输入getevent ,按遥控器可以查看到键值
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| getevent -l
/dev/input/event0: 0004 000400000068 <--- IR Code 0x68=104
/dev/input/event0: 0001 0042 00000001
/dev/input/event0:EV_MSC MSC_SCAN 00000068
/dev/input/event0:EV_KEY KEY_VOLUME_UP DOWN <--- linux key name KEY_VOLUME_UP
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