text: /* mbed Microcontroller Library
   * Copyright (C) 2016 Renesas Electronics Corporation. All rights reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include "TouchKey_4_3inch.h"
  
  TouchKey_4_3inch::TouchKey_4_3inch(PinName tprst, PinName tpint, PinName sda, PinName scl) :
   TouchKey(tprst, tpint), i2c(sda, scl) {
  }
  
  int TouchKey_4_3inch::GetMaxTouchNum(void) {
      return 1;
  }
  
  int TouchKey_4_3inch::GetCoordinates(int touch_buff_num, touch_pos_t * p_touch) {
      char buf[8];
      stx_report_data_t *pdata;
      touch_pos_t * wk_touch;
      int count = 0;
      int i;
      int read_size;
  
      if (touch_buff_num > GetMaxTouchNum()) {
          touch_buff_num =  GetMaxTouchNum();
      }
      if (touch_buff_num < 2) {
          read_size = 5;
      } else {
          read_size = 8;
      }
  
      if (p_touch != NULL) {
          for (i = 0; i < touch_buff_num; i++) {
              wk_touch        = &p_touch[i];
              wk_touch->x     = 0;
              wk_touch->y     = 0;
              wk_touch->valid = false;
          }
          if (i2c.read((0x55 << 1), buf, read_size) == 0) {
              pdata = (stx_report_data_t *)buf;
              if (pdata->fingers) {
                  for (i = 0; i < touch_buff_num; i++) {
                      if (pdata->xyz_data[i].valid) {
                          wk_touch        = &p_touch[i];
                          wk_touch->x     = (pdata->xyz_data[i].x_h << 8) | pdata->xyz_data[i].x_l;
                          wk_touch->y     = (pdata->xyz_data[i].y_h << 8) | pdata->xyz_data[i].y_l;
                          wk_touch->valid = true;
                          count++;
                      }
                  }
              }
          }
      }
  
      return count;
  }
  
  
  