mx53 linux gpio 模拟matrix keypad

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mx53 linux 用gpio模拟matrix keypad需要做的工作

1、在配置内核驱动的时候添加 gpiomatrix keypad

DeviceDrivers —>

Inputdevice support —>

Keyboards —>

<*> GPIO driven matrix keypad support

2、在mx53_loco.c文件中添加代码

static const uint32_t mx53_keymap[] = {

KEY(0,0, KEY_0),

// KEY(0,1, KEY_A),

// KEY(0,2, KEY_3),

// KEY(0,3, KEY_5),

// KEY(0,4, KEY_6),

// KEY(0,5, KEY_7),

// KEY(0,6, KEY_9),

// KEY(1,0, KEY_9),

// KEY(1,1, KEY_E),

// KEY(1,2, KEY_4),

// KEY(1,3, KEY_R),

// KEY(1,4, KEY_Y),

// KEY(1,5, KEY_8),

// KEY(1,6, KEY_I),

// KEY(2,0, KEY_TAB),

// KEY(2,1, KEY_Q),

// KEY(2,2, KEY_E),

// KEY(2,3, KEY_T),

// KEY(2,4, KEY_G),

// KEY(2,5, KEY_U),

// KEY(2,6, KEY_J),

};

static struct matrix_keymap_data mx53_keymap_data= {

.keymap = mx53_keymap,

.keymap_size = ARRAY_SIZE(mx53_keymap),

};

static const int mx53_row_gpios[] =

{GPIO_4_0};

static const int mx53_col_gpios[] =

{GPIO_4_1};

static struct matrix_keypad_platform_datamx53_pdata = {

.keymap_data = &mx53_keymap_data,

.row_gpios = mx53_row_gpios,

.col_gpios = mx53_col_gpios,

.num_row_gpios = ARRAY_SIZE(mx53_row_gpios),

.num_col_gpios = ARRAY_SIZE(mx53_col_gpios),

.col_scan_delay_us = 10,

.debounce_ms = 80,

// .wakeup = 1,

.active_low = 1,

};

static struct platform_device mx53_device ={

.name = “matrix-keypad”,

.id = -1,

.dev = {

.platform_data= &mx53_pdata,

},

};

static void __initmx53_add__matrix_keypad(void)

{

platform_device_register(&mx53_device);

}

在static void __init mxc_board_init(void)函数中添加代码

mx53_add__matrix_keypad();

系统启动后，运行qt程序时，按下按键有如下打印消息

keycode is 48 unicode is 48 modifiers is 0 isPress is 1,autoRepeat is 0 keycode is 48 unicode is 48 modifiers is 0 isPress is 0,autoRepeat is 0

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