These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
Diff: PWM/Match_Interrupt/pwm_match_int.c
- Revision:
- 0:bf7b9fba3924
diff -r 000000000000 -r bf7b9fba3924 PWM/Match_Interrupt/pwm_match_int.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PWM/Match_Interrupt/pwm_match_int.c Sun Mar 20 05:38:56 2011 +0000 @@ -0,0 +1,205 @@ +/***********************************************************************//** + * @file pwm_match_int.c + * @purpose PWM match interrupt example + * @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_pwm.h" +#include "lpc17xx_libcfg.h" +#include "lpc17xx_pinsel.h" + +/* Example group ----------------------------------------------------------- */ +/** @defgroup PWM_Match_Interrupt Match_Interrupt + * @ingroup PWM_Examples + * @{ + */ + +/************************** PRIVATE DEFINITIONS *************************/ +// Time out definition - used in blocking mode in read/write function +#define TIME_OUT 10000 + + +/************************** PRIVATE VARIABLES *************************/ +__IO uint32_t match_cnt = 0; +__IO uint32_t long_duty = 0; + +/************************** PRIVATE FUNCTIONS *************************/ +/* Interrupt service routine */ +void PWM1_IRQHandler(void); + +/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ +/*********************************************************************//** + * @brief GPDMA interrupt handler sub-routine + * @param[in] None + * @return None + **********************************************************************/ +void PWM1_IRQHandler(void) +{ + /* Check whether if match flag for channel 0 is set or not */ + if (PWM_GetIntStatus(LPC_PWM1, PWM_INTSTAT_MR0)) + { + match_cnt++; + /* Clear the interrupt flag */ + PWM_ClearIntPending(LPC_PWM1, PWM_INTSTAT_MR0); + } +} + + +/*-------------------------MAIN FUNCTION------------------------------*/ +/*********************************************************************//** + * @brief c_entry: Main PWM program body + * @param[in] None + * @return int + **********************************************************************/ +int c_entry(void) +{ + uint8_t temp, temp2; + PWM_TIMERCFG_Type PWMCfgDat; + PWM_MATCHCFG_Type PWMMatchCfgDat; + PINSEL_CFG_Type PinCfg; + + /* PWM block section -------------------------------------------- */ + /* Initialize PWM peripheral, timer mode + * PWM prescale value = 1 (absolute value - tick value) */ + PWMCfgDat.PrescaleOption = PWM_TIMER_PRESCALE_TICKVAL; + PWMCfgDat.PrescaleValue = 1; + PWM_Init(LPC_PWM1, PWM_MODE_TIMER, (void *) &PWMCfgDat); + + /* + * Initialize PWM pin connect + */ + PinCfg.Funcnum = 1; + PinCfg.OpenDrain = 0; + PinCfg.Pinmode = 0; + PinCfg.Portnum = 2; + for (temp = 0; temp <= 6; temp++){ + PinCfg.Pinnum = temp; + PINSEL_ConfigPin(&PinCfg); + } + + + /* Set match value for PWM match channel 0 = 256, update immediately */ + PWM_MatchUpdate(LPC_PWM1, 0, 256, PWM_MATCH_UPDATE_NOW); + /* PWM Timer/Counter will be reset when channel 0 matching + * Enable interrupt when match + * no stop when match */ + PWMMatchCfgDat.IntOnMatch = ENABLE; + PWMMatchCfgDat.MatchChannel = 0; + PWMMatchCfgDat.ResetOnMatch = ENABLE; + PWMMatchCfgDat.StopOnMatch = DISABLE; + PWM_ConfigMatch(LPC_PWM1, &PWMMatchCfgDat); + + /* Configure each PWM channel: --------------------------------------------- */ + /* - Single edge + * - PWM Duty on each PWM channel determined by + * the match on channel 0 to the match of that match channel. + * Example: PWM Duty on PWM channel 1 determined by + * the match on channel 0 to the match of match channel 1. + */ + + /* Configure PWM channel edge option + * Note: PWM Channel 1 is in single mode as default state and + * can not be changed to double edge mode */ + for (temp = 2; temp < 7; temp++) + { + PWM_ChannelConfig(LPC_PWM1, temp, PWM_CHANNEL_SINGLE_EDGE); + } + + /* Setting interrupt for PWM ---------------------------------------------- */ + /* Disable PWM interrupt */ + NVIC_DisableIRQ(PWM1_IRQn); + /* preemption = 1, sub-priority = 1 */ + NVIC_SetPriority(PWM1_IRQn, ((0x01<<3)|0x01)); + + /* Configure match value for each match channel */ + temp2 = 10; + for (temp = 1; temp < 7; temp++) + { + /* Set up match value */ + PWM_MatchUpdate(LPC_PWM1, temp, temp2, PWM_MATCH_UPDATE_NOW); + /* Configure match option */ + PWMMatchCfgDat.IntOnMatch = DISABLE; + PWMMatchCfgDat.MatchChannel = temp; + PWMMatchCfgDat.ResetOnMatch = DISABLE; + PWMMatchCfgDat.StopOnMatch = DISABLE; + PWM_ConfigMatch(LPC_PWM1, &PWMMatchCfgDat); + /* Enable PWM Channel Output */ + PWM_ChannelCmd(LPC_PWM1, temp, ENABLE); + /* Increase match value by 10 */ + temp2 += 10; + } + + /* Enable PWM interrupt */ + NVIC_EnableIRQ(PWM1_IRQn); + + /* Reset and Start counter */ + PWM_ResetCounter(LPC_PWM1); + PWM_CounterCmd(LPC_PWM1, ENABLE); + + /* Start PWM now */ + PWM_Cmd(LPC_PWM1, ENABLE); + + // Update PWM1.1 every 0x1000 match interrupt + while (1) + { + if (match_cnt >= 0x1000) { + match_cnt = 0; + long_duty++; + if (long_duty >= 256) { + // Reset duty + long_duty = 0; + // Print info + //UART_Puts_(uartdev, "PWM1.1 is reset!"); + } + + // Update PWM1.1 duty + PWM_MatchUpdate(LPC_PWM1, 1, long_duty, PWM_MATCH_UPDATE_NOW); + } + } + 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 + +/* + * @} + */