Lab Session 4

在Lab 3的基礎上增加低功耗 (Auto Judgement) 功能

5.4

增加低功耗 (Auto Judgement) 功能應用程序

5.4.1 將培訓配套資料Checkpoints文件夾中的工程 "Lab session 4" 中的qe_gen文件的 "qe_touch_sample.c" 拷貝

并覆蓋 "Project Explorer" 的Lab_session_1工程中qe_gen文件的 "qe_touch_sample.c".

5.4.2 應用程序代碼說明

使用init_peripheral_function初始化需要使用的外設

使用R_CTSU_Open() 初始化config01 (MEC電極)

使用RM_TOUCH_Open() 初始化config02 (12個自容式按鍵)

/* Initialize peripheral functions */
init_peripheral_function();
/* Open Touch middleware */
err = R_CTSU_Open (g_qe_ctsu_instance_config01.p_ctrl, g_qe_ctsu_instance_config01.p_cfg);
ctsu_ctrl = (ctsu_instance_ctrl_t *)g_qe_ctsu_instance_config01.p_ctrl;
err = RM_TOUCH_Open (g_qe_touch_instance_config02.p_ctrl, g_qe_touch_instance_config02.p_cfg);

5.4.3 應用程序代碼說明

以下代碼完成config01 (MEC電極) 和 config02 (12個自容式按鍵電極) 的初始化偏置電流調整。

/* Initial Offset Tuning */
{
  (void)R_LPT_SetCMT(LPT_CH1, (uint32_t)WAKEUP_LPT_PERIOD_NORMAL);
  /* Method1 offset tuning */
  do
  {
    err = R_CTSU_ScanStart (g_qe_ctsu_instance_config01.p_ctrl);
    if (FSP_SUCCESS != err)
    {
      while (true) {}
    }
    (void)R_LPT_Control(LPT_CMD_START);
    while (0 == g_qe_touch_flag) {}
    g_qe_touch_flag = 0;
    err = R_CTSU_OffsetTuning (g_qe_ctsu_instance_config01.p_ctrl);
  } while(err != FSP_SUCCESS);
  /* Method2 offset tuning */
  do
  {
    err = RM_TOUCH_ScanStart (g_qe_touch_instance_config02.p_ctrl);
    if (FSP_SUCCESS != err)
    {
      while (true) {}
    }
    (void)R_LPT_Control(LPT_CMD_START);
    while (0 == g_qe_touch_flag) {}
    g_qe_touch_flag = 0;
    err = RM_TOUCH_DataGet(g_qe_touch_instance_config02.p_ctrl, &button_status02, NULL, NULL);
  } while(err != FSP_SUCCESS);
}

5.4.4 應用程序代碼說明

以下代碼完成config01 (MEC電極) 在Normal模式下的baseline調整。

/* base line setting @method1 */
for (uint32_t i = 0U; i < WAKEUP_TIME_BASELINE; i++)
{
 ? ? err = R_CTSU_ScanStart (g_qe_ctsu_instance_config01.p_ctrl);
 ? ? if (FSP_SUCCESS != err)
 ? ? {
 ? ? ? ? while (true) {}
 ? ? }
 ? ? (void)R_LPT_Control(LPT_CMD_START);
 ? ? R_BSP_SoftwareDelay(WAKEUP_WAIT_MEASUREEND, BSP_DELAY_MILLISECS);
 ? ? (void)R_LPT_Control(LPT_CMD_STOP);
 ? ? (void)R_LPT_Control(LPT_CMD_COUNT_RESET);
 ? ? ctsu_ctrl->state = CTSU_STATE_SCANNED;
   err = R_CTSU_AutoJudgementDataGet (g_qe_ctsu_instance_config01.p_ctrl,  &button_status01);
   if (FSP_SUCCESS == err)
   {
    RM_TOUCH_MonitorAddressGet (g_qe_touch_instance_config02.p_ctrl,
                  &monitor_buf_address,
                  &monitor_id_address,
                  &monitor_size_address);
    qe_monitor_autojudge (g_qe_ctsu_instance_config01.p_ctrl);
   }
}

5.4.5 應用程序代碼說明

以下代碼完成進入低功耗模式的操作，在低功耗模式里完成config01 (MEC電極) 的測量和自動判斷，當config01 (MEC電極) 有按鍵On判斷是時，退出低功耗，并通過R_CTSU_AutoJudgementDataGet() 取得結果。

/* Standby mode */
{
  /* for [CONFIG01] configuration */
  (void)R_LPT_SetCMT(LPT_CH1, (uint32_t)WAKEUP_LPT_PERIOD_STANDBY);
  err = R_CTSU_ScanStart (g_qe_ctsu_instance_config01.p_ctrl);
  /* Enter software standby mode */
  lpc_err = R_LPC_LowPowerModeActivate(&activate_standby_callback);
  if (LPC_SUCCESS != lpc_err)
  {
    while (true) {}
  }
  while (0 == g_qe_touch_flag) {}
  g_qe_touch_flag = 0;
  err = R_CTSU_AutoJudgementDataGet (g_qe_ctsu_instance_config01.p_ctrl, &button_status01);
  if (FSP_SUCCESS == err)
  {
    RM_TOUCH_MonitorAddressGet (g_qe_touch_instance_config02.p_ctrl,
                  &monitor_buf_address,
                  &monitor_id_address,
                  &monitor_size_address);
    qe_monitor_autojudge (g_qe_ctsu_instance_config01.p_ctrl);
  }
}

5.4.6 應用程序代碼說明

以下代碼為進入Software Standby Mode時的Callback程序，用于啟動Low-power Timer定時器。

/* activate_standby_callback */
static void activate_standby_callback(void *p_data)
{
  lpt_err_t lpt_err;
  /* Start LPT count */
  lpt_err = R_LPT_Control(LPT_CMD_START);
  if (LPT_SUCCESS != lpt_err) while(1);
}

5.4.7 應用程序代碼說明

以下代碼為退出Snooze Mode時的Callback程序，用于停止和復位Low-power Timer定時器，以及disable snooze release interrupt。

/*snooze_callback*/
static void snooze_callback(void *p_data)
{
  lpt_err_t lpt_err;
  lpc_err_t lpc_err;
  /* Stop LPT count */
  lpt_err = R_LPT_Control(LPT_CMD_STOP);
  if (LPT_SUCCESS != lpt_err) while(1);
  /* Reset LPT count */
  lpt_err = R_LPT_Control(LPT_CMD_COUNT_RESET);
  if (LPT_SUCCESS != lpt_err) while(1);
  /* Disable snooze release interrupt */
  lpc_err = R_LPC_SnoozeModeConfigure(&gs_snooze_mode);
  if (LPC_SUCCESS != lpc_err) while(1);
}

5.4.8 點擊圖標，編譯程序。

5.4.9 以上應用程序代碼的詳細解釋

您可參考瑞薩官網的應用筆記RX140 Group Smart Wakeup Solution Rev.1.00以及配套的樣例程序。

審核編輯：劉清