These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
Diff: SysTick/STCLK/systick_stclk.c
- Revision:
- 0:bf7b9fba3924
diff -r 000000000000 -r bf7b9fba3924 SysTick/STCLK/systick_stclk.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SysTick/STCLK/systick_stclk.c Sun Mar 20 05:38:56 2011 +0000 @@ -0,0 +1,161 @@ +/***********************************************************************//** + * @file systick_stclk.c + * @purpose This example describes how to configure System Tick to use + * with external clock source STCLK + * @version 2.0 + * @date 21. May. 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_libcfg.h" +#include "lpc17xx_gpio.h" +#include "lpc17xx_systick.h" +#include "lpc17xx_pinsel.h" +#include "lpc17xx_timer.h" + +/* Example group ----------------------------------------------------------- */ +/** @defgroup SysTick_STCLK STCLK + * @ingroup SysTick_Examples + * @{ + */ + +/************************** PRIVATE VARIABLES *************************/ +FunctionalState Cur_State = ENABLE; +Bool IO_State = FALSE; + +/************************** PRIVATE FUNCTIONS *************************/ +void SysTick_Handler(void); + +/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ +/*********************************************************************//** + * @brief SysTick interrupt handler + * @param None + * @return None + ***********************************************************************/ +void SysTick_Handler(void) +{ + //Clear System Tick counter flag + SYSTICK_ClearCounterFlag(); + //toggle P0.0 + if (Cur_State == ENABLE) + { + //pull-down pin + GPIO_ClearValue(0, (1<<0)); + Cur_State = DISABLE; + } + else + { + GPIO_SetValue(0, (1<<0)); + Cur_State = ENABLE; + } +} + + +/*-------------------------MAIN FUNCTION------------------------------*/ +/*********************************************************************//** + * @brief c_entry: Main program body + * @param[in] None + * @return int + **********************************************************************/ +int c_entry (void) +{ + PINSEL_CFG_Type PinCfg; + TIM_TIMERCFG_Type TIM_ConfigStruct; + TIM_MATCHCFG_Type TIM_MatchConfigStruct; + + // Conifg P1.28 as MAT0.0 + PinCfg.Funcnum = 3; + PinCfg.OpenDrain = 0; + PinCfg.Pinmode = 0; + PinCfg.Portnum = 1; + PinCfg.Pinnum = 28; + PINSEL_ConfigPin(&PinCfg); + + /* P3.26 as STCLK */ + PinCfg.Funcnum = 1; + PinCfg.OpenDrain = 0; + PinCfg.Pinmode = 0; + PinCfg.Portnum = 3; + PinCfg.Pinnum = 26; + PINSEL_ConfigPin(&PinCfg); + + // Initialize timer 0, prescale count time of 10uS + TIM_ConfigStruct.PrescaleOption = TIM_PRESCALE_USVAL; + TIM_ConfigStruct.PrescaleValue = 10; + + // use channel 0, MR0 + TIM_MatchConfigStruct.MatchChannel = 0; + // Disable interrupt when MR0 matches the value in TC register + TIM_MatchConfigStruct.IntOnMatch = TRUE; + //Enable reset on MR0: TIMER will reset if MR0 matches it + TIM_MatchConfigStruct.ResetOnMatch = TRUE; + //Stop on MR0 if MR0 matches it + TIM_MatchConfigStruct.StopOnMatch = FALSE; + //Toggle MR0.0 pin if MR0 matches it + TIM_MatchConfigStruct.ExtMatchOutputType =TIM_EXTMATCH_TOGGLE; + // Set Match value, count value of 10 (10 * 10uS = 100uS --> 10KHz) + TIM_MatchConfigStruct.MatchValue = 10; + + TIM_Init(LPC_TIM0, TIM_TIMER_MODE,&TIM_ConfigStruct); + TIM_ConfigMatch(LPC_TIM0,&TIM_MatchConfigStruct); + TIM_Cmd(LPC_TIM0,ENABLE); + + GPIO_SetDir(0, (1<<0), 1); //Set P0.0 as output + + //Use P0.0 to test System Tick interrupt + /* Initialize System Tick with 10ms time interval + * Frequency input = 10kHz /2 = 5kHz + * Time input = 10ms + */ + SYSTICK_ExternalInit(5000, 10); + //Enable System Tick interrupt + SYSTICK_IntCmd(ENABLE); + //Enable System Tick Counter + SYSTICK_Cmd(ENABLE); + + 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 + +/* + * @} + */