These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
TIMER/PWMSignal/pwm_signal.c
- Committer:
- frank26080115
- Date:
- 2011-03-20
- Revision:
- 0:bf7b9fba3924
File content as of revision 0:bf7b9fba3924:
/***********************************************************************//** * @file pwm_signal.c * @purpose This example use TIMERs to generate 4 PWM signals with * different duty cycle * @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 "debug_frmwrk.h" #include "lpc17xx_gpio.h" #include "lpc17xx_pinsel.h" #include "lpc17xx_timer.h" /* Example group ----------------------------------------------------------- */ /** @defgroup TIMER_PWMSignal PWMSignal * @ingroup TIMER_Examples * @{ */ /************************** PRIVATE VARIABLES *************************/ uint8_t menu[]= "********************************************************************************\n\r" "Hello NXP Semiconductors \n\r" "System Tick 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 used TIMERs to generate 4 PWM signals with different duty cycles \n\r" "********************************************************************************\n\r"; FunctionalState PWM0_State = ENABLE; FunctionalState PWM1_State = ENABLE; FunctionalState PWM2_State = ENABLE; FunctionalState PWM3_State = ENABLE; TIM_TIMERCFG_Type TIM_ConfigStruct; TIM_MATCHCFG_Type TIM_MatchConfigStruct; /************************** PRIVATE FUNCTIONS *************************/ void TIMER0_IRQHandler(void); void TIMER1_IRQHandler(void); void TIMER2_IRQHandler(void); void TIMER3_IRQHandler(void); void print_menu(void); /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ /*********************************************************************//** * @brief TIMER0 interrupt handler * @param None * @return None ***********************************************************************/ void TIMER0_IRQHandler(void) { //duty cycle = 12.5% TIM_Cmd(LPC_TIM0,DISABLE); TIM_ClearIntPending(LPC_TIM0, TIM_MR0_INT); TIM_ResetCounter(LPC_TIM0); if((PWM0_State == ENABLE)) { TIM_UpdateMatchValue(LPC_TIM0, 0, 100); PWM0_State = DISABLE; } else { TIM_UpdateMatchValue(LPC_TIM0, 0, 700); PWM0_State = ENABLE; } TIM_Cmd(LPC_TIM0,ENABLE); } /*********************************************************************//** * @brief TIMER1 interrupt handler * @param None * @return None ***********************************************************************/ void TIMER1_IRQHandler(void) { //duty cycle = 25% TIM_Cmd(LPC_TIM1,DISABLE); TIM_ClearIntPending(LPC_TIM1, TIM_MR0_INT); TIM_ResetCounter(LPC_TIM1); if((PWM1_State == ENABLE)) { TIM_UpdateMatchValue(LPC_TIM1,0, 200); PWM1_State = DISABLE; } else { TIM_UpdateMatchValue(LPC_TIM1,0, 600); PWM1_State = ENABLE; } TIM_Cmd(LPC_TIM1,ENABLE); } /*********************************************************************//** * @brief TIMER2 interrupt handler * @param None * @return None ***********************************************************************/ void TIMER2_IRQHandler(void) { //duty cycle = 37,5% TIM_Cmd(LPC_TIM2,DISABLE); TIM_ClearIntPending(LPC_TIM2, TIM_MR0_INT); TIM_ResetCounter(LPC_TIM2); if((PWM2_State == ENABLE)) { TIM_UpdateMatchValue(LPC_TIM2,0, 300); PWM2_State = DISABLE; } else { TIM_UpdateMatchValue(LPC_TIM2,0, 500); PWM2_State = ENABLE; } TIM_Cmd(LPC_TIM2,ENABLE); } /*********************************************************************//** * @brief TIMER3 interrupt handler * @param None * @return None ***********************************************************************/ void TIMER3_IRQHandler(void) { //duty cycle = 50% TIM_Cmd(LPC_TIM3,DISABLE); TIM_ClearIntPending(LPC_TIM3, TIM_MR0_INT); TIM_ResetCounter(LPC_TIM3); TIM_Cmd(LPC_TIM3,ENABLE); } /*-------------------------PRIVATE FUNCTIONS------------------------------*/ /*********************************************************************//** * @brief Print Welcome menu * @param[in] none * @return None **********************************************************************/ void print_menu(void) { _DBG(menu); } /*-------------------------MAIN FUNCTION------------------------------*/ /*********************************************************************//** * @brief c_entry: Main TIMER program body * @param[in] None * @return int **********************************************************************/ int c_entry (void) { PINSEL_CFG_Type PinCfg; /* Initialize debug via UART0 * 115200bps * 8 data bit * No parity * 1 stop bit * No flow control */ debug_frmwrk_init(); // print welcome screen print_menu(); /* Select pin: * P1.28: MAT0.0 * P1.22: MAT1.0 * P0.6: MAT2.0 * P0.10: MAT3.0 */ PinCfg.Funcnum = 3; PinCfg.OpenDrain = 0; PinCfg.Pinmode = 0; PinCfg.Portnum = 1; PinCfg.Pinnum = 28; PINSEL_ConfigPin(&PinCfg); PinCfg.Pinnum = 22; PINSEL_ConfigPin(&PinCfg); PinCfg.Portnum = 0; PinCfg.Pinnum = 6; PINSEL_ConfigPin(&PinCfg); PinCfg.Pinnum = 10; PINSEL_ConfigPin(&PinCfg); // Initialize 4 timers, prescale count time of 100uS TIM_ConfigStruct.PrescaleOption = TIM_PRESCALE_USVAL; TIM_ConfigStruct.PrescaleValue = 100; TIM_Init(LPC_TIM0, TIM_TIMER_MODE,&TIM_ConfigStruct); TIM_Init(LPC_TIM1, TIM_TIMER_MODE,&TIM_ConfigStruct); TIM_Init(LPC_TIM2, TIM_TIMER_MODE,&TIM_ConfigStruct); TIM_Init(LPC_TIM3, TIM_TIMER_MODE,&TIM_ConfigStruct); // Configure 4 match channels // use channel 0, MR0 TIM_MatchConfigStruct.MatchChannel = 0; // Enable 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 pin if MR0 matches it TIM_MatchConfigStruct.ExtMatchOutputType = TIM_EXTMATCH_TOGGLE; // Set Match value TIM_MatchConfigStruct.MatchValue = 700; // Set configuration for Tim_MatchConfig TIM_ConfigMatch(LPC_TIM0,&TIM_MatchConfigStruct); TIM_MatchConfigStruct.MatchValue = 600; TIM_ConfigMatch(LPC_TIM1,&TIM_MatchConfigStruct); TIM_MatchConfigStruct.MatchValue = 500; TIM_ConfigMatch(LPC_TIM2,&TIM_MatchConfigStruct); TIM_MatchConfigStruct.MatchValue = 800; TIM_ConfigMatch(LPC_TIM3,&TIM_MatchConfigStruct); /* preemption = 1, sub-priority = 1 */ NVIC_SetPriority(TIMER0_IRQn, ((0x01<<3)|0x01)); /* Enable interrupt for timer 0 */ NVIC_EnableIRQ(TIMER0_IRQn); // To start timer 0 TIM_Cmd(LPC_TIM0,ENABLE); /* preemption = 1, sub-priority = 1 */ NVIC_SetPriority(TIMER1_IRQn, ((0x01<<3)|0x02)); /* Enable interrupt for timer 1 */ NVIC_EnableIRQ(TIMER1_IRQn); // To start timer 1 TIM_Cmd(LPC_TIM1,ENABLE); /* preemption = 1, sub-priority = 1 */ NVIC_SetPriority(TIMER2_IRQn, ((0x01<<3)|0x03)); /* Enable interrupt for timer 1 */ NVIC_EnableIRQ(TIMER2_IRQn); // To start timer 1 TIM_Cmd(LPC_TIM2,ENABLE); /* preemption = 1, sub-priority = 1 */ NVIC_SetPriority(TIMER3_IRQn, ((0x01<<3)|0x04)); /* Enable interrupt for timer 1 */ NVIC_EnableIRQ(TIMER3_IRQn); // To start timer 1 TIM_Cmd(LPC_TIM3,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 /* * @} */