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...
433 matrix_keypad_build_keymap(keymap_data, row_shift, 434 input_dev->keycode, input_dev->keybit); //从keymap_data里分解出行列键对应的键码 ... 439 err = init_matrix_gpio(pdev, keypad); //注册行线的中断号 ... 443 err = input_register_device(keypad->input_dev); //输入设备对象注...
GND1920GND 英创公司已经将驱动文件制作成内核驱动模块的形式放入文件系统中了,驱动名称为matrix_keypad.ko,用户要使用该功能,只需要加载驱动模块即可。驱动模块放在/lib/modules//下面,例如使用ESM335x主板,因为ESM335x的内核版本为4.1.6,输入命令为:insmode /lib/modules/4.1.6/matrix_keypad.ko,注意如果使用的主...
"auxiliaryKey", (void *)pKeypad); cat /proc/interrupts 显示注册的中断都有 116: 6 GPIO auxiliaryKey 137: 0 GPIO matrixkeypad 140: 0 GPIO rotationKey 145: 0 GPIO auxiliaryKey 158: 0 GPIO matrixkeypad 161: 0 GPIO auxiliaryKey 167: 0 GPIO rotationKey 169: 0 GPIO matrixkeypad 224: 0 G...
I am trying to add gpio-matrix keypad to iMX6 UItraLite device tree, but there is no response when I press the keypad, it looks that keypad scanning function is not working. Below is the matrix keypad device tree: matrix_keypad: matrix_keypad@0 { status = "okay"; compatible = "gpio...
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http://learn.adafruit.com/adafruit-16×2-character-lcd-plus-keypad-for-raspberry-pi http://learn.adafruit.com/adding-a-real-time-clock-to-raspberry-pi http://learn.adafruit.com/matrix-7-segment-led-backpack-with-the-raspberry-pi http://learn.adafruit.com/mcp4725-12-bit-dac-with-raspberry...
matrix 键盘_DEFAULT:Matrix 键盘_MODEUX-SINGLE 、引脚=< AM4372_OPAD (0x9a4、PIN_OUTPUT | AM4372_MOUX_OUTPLUX | AM4372_IN_MODIOUX_OUTPLUX | AM4372_IN_IN_IN_IN_MOUX_OUTPLUX | AM4372_IN_IN_MOUX_OUTPUT_TOUT_0_MOUX_IN_MOUX_OUTPUTDOUX_9)| AM4374UX_IN_MOUX_INUX_ Matl...
The general working principle of this key pad is a 44 matrix. The sample code scans the 44 matrix in a short time and determines whether there is a signal input( pression on the keypad). Before reading this sample code, you'd better have a look at the sample connection pic. You may ...
Keypad 2. GPIO/PWM/Interrupt Each ball that is configured as part of a Keypad Matrix or Dedicated Keypad input will automatically configure the ball direction, pull resistor and output buffer type. Any ball not configured as part of the keypad matrix will be available as GPIO, PWM or ...