Atmel XMEGA-A3BU试用报告二按键

surface321 · 发表于 2013-10-25 12:45:34

本帖最后由 SurfaceBook 于 2013-10-25 12:51 编辑

Atmel XMEGA-A3BU试用报告二，IE11浏览器中图片怎么没法添加的啊，下面附件是3个独立键盘和触摸按键的原理图

surface321 · 发表于 2013-10-25 12:53:32

本帖最后由 SurfaceBook 于 2013-10-25 13:07 编辑

关于3个独立按键

，分别是PE的5口和PF的1口和2口，当按键按下去时，对应的引脚检测出低电平，检测语句为gpio_pin_is_low（io_id）；
按键对应的名字
#define GPIO_PUSH_BUTTON_0 IOPORT_CREATE_PIN(PORTE, 5)#define GPIO_PUSH_BUTTON_1 IOPORT_CREATE_PIN(PORTF, 1)
#define GPIO_PUSH_BUTTON_2 IOPORT_CREATE_PIN(PORTF, 2)

所以检测语句如下面程序中所述

surface321 · 发表于 2013-10-25 12:56:23

本帖最后由 SurfaceBook 于 2013-10-25 13:09 编辑

下面是程序是按键例程
#include "xmega_a3bu_xplained.h"
#include "touch_api.h"
#include "keyboard.h"
#include "cdc.h"

/**
* \brief Check the status of the keyboard
*
* \param keybuffer  a keyboard_event struct to store keyboard status
*/
void keyboard_get_key_state(struct keyboard_event *keybuffer)
{
      // Variable to hold the key mask
      static uint8_t key_state;
      char key;

      if ((gpio_pin_is_low(GPIO_PUSH_BUTTON_0)) &&
                     !(key_state & KEYBOARD_ENTER_MASK)) {
            // Key pressed
            key_state |= KEYBOARD_ENTER_MASK;
            keybuffer->keycode = KEYBOARD_ENTER;
            keybuffer->type = KEYBOARD_PRESS;
      } else if ((gpio_pin_is_high(GPIO_PUSH_BUTTON_0))
                     && (key_state & KEYBOARD_ENTER_MASK)) {
            // Key released
            key_state &= ~KEYBOARD_ENTER_MASK;
            keybuffer->keycode = KEYBOARD_ENTER;
            keybuffer->type = KEYBOARD_RELEASE;
      } else if ((gpio_pin_is_low(GPIO_PUSH_BUTTON_1)) &&
                     !(key_state & KEYBOARD_UP_MASK)) {
            // Key pressed
            key_state |= KEYBOARD_UP_MASK;
            keybuffer->keycode = KEYBOARD_UP;
            keybuffer->type = KEYBOARD_PRESS;
      } else if ((gpio_pin_is_high(GPIO_PUSH_BUTTON_1))
                     && (key_state & KEYBOARD_UP_MASK)) {
            // Key released
            key_state &= ~KEYBOARD_UP_MASK;
            keybuffer->keycode = KEYBOARD_UP;
            keybuffer->type = KEYBOARD_RELEASE;
      } else if ((gpio_pin_is_low(GPIO_PUSH_BUTTON_2)) &&
                     !(key_state & KEYBOARD_DOWN_MASK)) {
            // Key pressed
            key_state |= KEYBOARD_DOWN_MASK;
            keybuffer->keycode = KEYBOARD_DOWN;
            keybuffer->type = KEYBOARD_PRESS;
      } else if ((gpio_pin_is_high(GPIO_PUSH_BUTTON_2))
                     && (key_state & KEYBOARD_DOWN_MASK)) {
            // Key released
            key_state &= ~KEYBOARD_DOWN_MASK;
            keybuffer->keycode = KEYBOARD_DOWN;
            keybuffer->type = KEYBOARD_RELEASE;

      // touch key
      } else if ((check_touch_key_pressed()) &&
                     !(key_state & KEYBOARD_BACK_MASK)) {
            // Touch key pressed
            key_state |= KEYBOARD_BACK_MASK;
            keybuffer->keycode = KEYBOARD_BACK;
            keybuffer->type = KEYBOARD_PRESS;
      } else if ((!check_touch_key_pressed()) &&
                     (key_state & KEYBOARD_BACK_MASK)) {
            // Touch key released
            key_state &= ~KEYBOARD_BACK_MASK;
            keybuffer->keycode = KEYBOARD_BACK;
            keybuffer->type = KEYBOARD_RELEASE;
      } else if ((key = cdc_getkey()) != KEYBOARD_NO_KEY) {
            keybuffer->keycode = key;
            keybuffer->type = KEYBOARD_RELEASE;
      } else {
            keybuffer->keycode = KEYBOARD_NO_KEY;
            keybuffer->type = KEYBOARD_NO_EVENT;
      }
}

GY@艳 · 发表于 2013-10-25 13:08:18

帖子很赞哟！辛苦辛苦。。。

fj1161 · 发表于 2013-10-26 08:19:39

赞一个~~~~~~~~~~~~~··

天师猫神 · 发表于 2013-10-27 14:04:44

辛苦辛苦。。。辛苦辛苦。。辛苦辛苦。。。。

Atmel XMEGA-A3BU试用报告二按键

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