/*********************************************************************//** * @brief c_entry: Main program body * @param[in] None * @return int **********************************************************************/ int c_entry (void) { /* Initialize debug via UART0 * – 115200bps * – 8 data bit * – No parity * – 1 stop bit * – No flow control */ debug_frmwrk_init(); // print welcome screen print_menu(); /* In this example: * Suppose that the RTC need periodically adjust after each 5 second. * And the time counter need by incrementing the counter by 2 instead of 1 * We will observe timer counter after calibration via serial display */ // Init RTC module RTC_Init(LPC_RTC); /* Enable rtc (starts increase the tick counter and second counter register) */ RTC_ResetClockTickCounter(LPC_RTC); RTC_Cmd(LPC_RTC, ENABLE); //Set current time = 0 RTC_SetTime (LPC_RTC, RTC_TIMETYPE_SECOND, 0); /* Setting Timer calibration * Calibration value = 5s; * Direction = Forward calibration * So after each 5s, calibration logic can periodically adjust the time counter by * incrementing the counter by 2 instead of 1 */ RTC_CalibConfig(LPC_RTC, 5, RTC_CALIB_DIR_FORWARD); RTC_CalibCounterCmd(LPC_RTC, ENABLE); /* Set the CIIR for second counter interrupt*/ RTC_CntIncrIntConfig (LPC_RTC, RTC_TIMETYPE_SECOND, ENABLE); /* Enable RTC interrupt */ NVIC_EnableIRQ(RTC_IRQn); /* Loop forever */ while(1); return 1; }
/*********************************************************************//** * @brief c_entry: Main program body * @param[in] None * @return None **********************************************************************/ void c_entry (void) { uint32_t pre_secval = 0, inc = 0, calib_cnt = 0; /* Initialize debug via UART0 * – 115200bps * – 8 data bit * – No parity * – 1 stop bit * – No flow control */ debug_frmwrk_init(); // print welcome screen print_menu(); /* In this example: * Suppose that the RTC need periodically adjust after each 5 second. * And the time counter need by incrementing the counter by 2 instead of 1 * We will observe timer counter after calibration via serial display */ // Init RTC module RTC_Init(LPC_RTC); /* Enable rtc (starts increase the tick counter and second counter register) */ RTC_ResetClockTickCounter(LPC_RTC); RTC_Cmd(LPC_RTC, ENABLE); //Set current time = 0 RTC_SetTime (LPC_RTC, RTC_TIMETYPE_SECOND, 0); /* Setting Timer calibration * Calibration value = 6s; * Direction = Forward calibration * So after each 6s, calibration logic can periodically adjust the time counter by * incrementing the counter by 2 instead of 1 */ RTC_CalibConfig(LPC_RTC, 6, RTC_CALIB_DIR_FORWARD); RTC_CalibCounterCmd(LPC_RTC, ENABLE); /* Set the CIIR for second counter interrupt*/ RTC_CntIncrIntConfig (LPC_RTC, RTC_TIMETYPE_SECOND, ENABLE); /* Enable RTC interrupt */ NVIC_EnableIRQ(RTC_IRQn); /* Loop forever */ while(1) { if(pre_secval != secval) { if(pre_secval > secval) inc = 60 + secval - pre_secval; else inc = secval - pre_secval; if(inc > 1) { _DBG ("Second: "); _DBD(secval); _DBG("--> Increase ");_DBD(inc); _DBG(" after ");_DBD(calib_cnt);_DBG(" seconds"); _DBG_(""); calib_cnt = 0; } else { _DBG ("Second: "); _DBD(secval); _DBG_(""); calib_cnt++; } pre_secval = secval; } } }