These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
Diff: RTC/Calibration/rtc_calib.c
- Revision:
- 0:bf7b9fba3924
diff -r 000000000000 -r bf7b9fba3924 RTC/Calibration/rtc_calib.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RTC/Calibration/rtc_calib.c Sun Mar 20 05:38:56 2011 +0000 @@ -0,0 +1,168 @@ +/***********************************************************************//** + * @file rtc_calib.c + * @purpose This example describes how to calibrate real time clock. + * @version 2.0 + * @date 18. June. 2010 + * @author NXP MCU SW Application Team + *--------------------------------------------------------------------- + * Software that is described herein is for illustrative purposes only + * which provides customers with programming information regarding the + * products. This software is supplied "AS IS" without any warranties. + * NXP Semiconductors assumes no responsibility or liability for the + * use of the software, conveys no license or title under any patent, + * copyright, or mask work right to the product. NXP Semiconductors + * reserves the right to make changes in the software without + * notification. NXP Semiconductors also make no representation or + * warranty that such application will be suitable for the specified + * use without further testing or modification. + **********************************************************************/ +#include "LPC17xx.h" +#include "lpc17xx_clkpwr.h" +#include "lpc17xx_libcfg.h" +#include "debug_frmwrk.h" +#include "lpc17xx_rtc.h" + +/* Example group ----------------------------------------------------------- */ +/** @defgroup RTC_Calibration Calibration + * @ingroup RTC_Examples + * @{ + */ + + +/************************** PRIVATE VARIABLES *************************/ +uint8_t menu[]= + "********************************************************************************\n\r" + "Hello NXP Semiconductors \n\r" + "RTC Calibration demo \n\r" + "\t - MCU: LPC17xx \n\r" + "\t - Core: ARM CORTEX-M3 \n\r" + "\t - Communicate via: UART0 - 115200 bps \n\r" + "This example describes how to calibrate RTC \n\r" + "********************************************************************************\n\r"; + +/************************** PRIVATE FUNCTIONS *************************/ +void print_menu(void); +void RTC_IRQHandle(void); + +/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ +/*********************************************************************//** + * @brief RTC interrupt handler sub-routine + * @param[in] None + * @return None + **********************************************************************/ +void RTC_IRQHandler(void) +{ + uint32_t secval; + + /* This is increment counter interrupt*/ + if (RTC_GetIntPending(LPC_RTC, RTC_INT_COUNTER_INCREASE)) + { + secval = RTC_GetTime (LPC_RTC, RTC_TIMETYPE_SECOND); + + /* Send debug information */ + _DBG ("Second: "); _DBD(secval); + _DBG_(""); + + // Clear pending interrupt + RTC_ClearIntPending(LPC_RTC, RTC_INT_COUNTER_INCREASE); + } +} + +/*-------------------------PRIVATE FUNCTIONS------------------------------*/ +/*********************************************************************//** + * @brief Print Welcome menu + * @param[in] none + * @return None + **********************************************************************/ +void print_menu(void) +{ + _DBG(menu); +} + +/*-------------------------MAIN FUNCTION------------------------------*/ +/*********************************************************************//** + * @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; +} + + +/* With ARM and GHS toolsets, the entry point is main() - this will + allow the linker to generate wrapper code to setup stacks, allocate + heap area, and initialize and copy code and data segments. For GNU + toolsets, the entry point is through __start() in the crt0_gnu.asm + file, and that startup code will setup stacks and data */ +int main(void) +{ + return c_entry(); +} + +#ifdef DEBUG +/******************************************************************************* +* @brief Reports the name of the source file and the source line number +* where the CHECK_PARAM error has occurred. +* @param[in] file Pointer to the source file name +* @param[in] line assert_param error line source number +* @return None +*******************************************************************************/ +void check_failed(uint8_t *file, uint32_t line) +{ + /* User can add his own implementation to report the file name and line number, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + + /* Infinite loop */ + while(1); +} +#endif + +/* + * @} + */