/*********************************************************************//**
* @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;
}
}
}
