这是这个例子，那么这个PWM中断的意义是什么呢？有谁给我举个例子，让我加深一下理解。
/*---------------------------------------------------------------------------------------------------------*/
/* */
/* Copyright(c) 2017 Nuvoton Technology Corp. All rights reserved. */
/* */
/*---------------------------------------------------------------------------------------------------------*/
//***********************************************************************************************************
// Nuvoton Technoledge Corp.
// Website: http://www.nuvoton.com
// E-Mail : MicroC-8bit@nuvoton.com
// Date : Apr/21/2017
//***********************************************************************************************************
//***********************************************************************************************************
// File Function: N76E003 PWM Output demo code
//***********************************************************************************************************
#include "N76E003.h"
#include "Common.h"
#include "Delay.h"
#include "SFR_Macro.h"
#include "Function_define.h"
//***************** The Following is in define in Fucntion_define.h ***************************
//****** Always include Function_define.h call the define you want, detail see main(void) *******
//***********************************************************************************************
#if 0
//--------- PMW clock source select define ---------------------
//#define PWM_CLOCK_FSYS CKCON&=0xBF
//#define PWM_CLOCK_TIMER1 CKCON|=0x40
////--------- PWM clock devide define ----------------------------
//#define PWM_CLOCK_DIV_2 PWMCON1|=0x01;PWMCON1&=0xF9
//#define PWM_CLOCK_DIV_4 PWMCON1|=0x02;PWMCON1&=0xFA
//#define PWM_CLOCK_DIV_8 PWMCON1|=0x03;PWMCON1&=0xFB
//#define PWM_CLOCK_DIV_16 PWMCON1|=0x04;PWMCON1&=0xFC
//#define PWM_CLOCK_DIV_32 PWMCON1|=0x05;PWMCON1&=0xFD
//#define PWM_CLOCK_DIV_64 PWMCON1|=0x06;PWMCON1&=0xFE
//#define PWM_CLOCK_DIV_128 PWMCON1|=0x07
////--------- PWM I/O select define ------------------------------
//#define PWM5_P15_OUTPUT_ENABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1|=0x20;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P1.5 as PWM5 output enable
//#define PWM5_P03_OUTPUT_ENABLE PIOCON0|=0x20 //P0.3 as PWM5
//#define PWM4_P01_OUTPUT_ENABLE PIOCON0|=0x10 //P0.1 as PWM4 output enable
//#define PWM3_P04_OUTPUT_ENABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1|=0x08;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P0.4 as PWM3 output enable
//#define PWM3_P00_OUTPUT_ENABLE PIOCON0|=0x08 //P0.0 as PWM3
//#define PWM2_P05_OUTPUT_ENABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1|=0x04;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P1.0 as PWM2 output enable
//#define PWM2_P10_OUTPUT_ENABLE PIOCON0|=0x04 //P1.0 as PWM2
//#define PWM1_P14_OUTPUT_ENABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1|=0x02;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P1.4 as PWM1 output enable
//#define PWM1_P11_OUTPUT_ENABLE PIOCON0|=0x02 //P1.1 as PWM1
//#define PWM0_P12_OUTPUT_ENABLE PIOCON0|=0x01 //P1.2 as PWM0 output enable
//#define ALL_PWM_OUTPUT_ENABLE PIOCON0=0xFF;PIOCON1=0xFF
//#define PWM5_P15_OUTPUT_DISABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1&=0xDF;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P1.5 as PWM5 output disable
//#define PWM5_P03_OUTPUT_DISABLE PIOCON0&=0xDF //P0.3 as PWM5
//#define PWM4_P01_OUTPUT_DISABLE PIOCON0&=0xEF //P0.1 as PWM4 output disable
//#define PWM3_P04_OUTPUT_DISABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1&=0xF7;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P0.4 as PWM3 output disable
//#define PWM3_P00_OUTPUT_DISABLE PIOCON0&=0xF7 //P0.0 as PWM3
//#define PWM2_P05_OUTPUT_DISABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1&=0xFB;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P1.0 as PWM2 output disable
//#define PWM2_P10_OUTPUT_DISABLE PIOCON0&=0xFB //P1.0 as PWM2
//#define PWM1_P14_OUTPUT_DISABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;SFRS|=0x01;PIOCON1&=0xFD;TA=0xAA;TA=0x55;SFRS&=0xFE;EA=BIT_TMP //P1.4 as PWM1 output disable
//#define PWM1_P11_OUTPUT_DISABLE PIOCON0&=0xFD //P1.1 as PWM1
//#define PWM0_P12_OUTPUT_DISABLE PIOCON0&=0xFE //P1.2 as PWM0 output disable
//#define ALL_PWM_OUTPUT_DISABLE PIOCON0=0x00;PIOCON1=0x00
////--------- PWM I/O Polarity Control ---------------------------
//#define PWM5_OUTPUT_INVERSE PNP|=0x20
//#define PWM4_OUTPUT_INVERSE PNP|=0x10
//#define PWM3_OUTPUT_INVERSE PNP|=0x08
//#define PWM2_OUTPUT_INVERSE PNP|=0x04
//#define PWM1_OUTPUT_INVERSE PNP|=0x02
//#define PWM0_OUTPUT_INVERSE PNP|=0x01
//#define PWM_OUTPUT_ALL_INVERSE PNP=0xFF
//#define PWM5_OUTPUT_NORMAL PNP&=0xDF
//#define PWM4_OUTPUT_NORMAL PNP&=0xEF
//#define PWM3_OUTPUT_NORMAL PNP&=0xF7
//#define PWM2_OUTPUT_NORMAL PNP&=0xFB
//#define PWM1_OUTPUT_NORMAL PNP&=0xFD
//#define PWM0_OUTPUT_NORMAL PNP&=0xFE
//#define PWM_OUTPUT_ALL_NORMAL PNP=0x00
////--------- PWM type define ------------------------------------
//#define PWM_EDGE_TYPE PWMCON1&=~SET_BIT4
//#define PWM_CENTER_TYPE PWMCON1|=SET_BIT4
////--------- PWM mode define ------------------------------------
//#define PWM_IMDEPENDENT_MODE PWMCON1&=0x3F
//#define PWM_COMPLEMENTARY_MODE PWMCON1|=0x40;PWMCON1&=0x7F
//#define PWM_SYNCHRONIZED_MODE PWMCON1|=0x80;PWMCON1&=0xBF
//#define PWM_GP_MODE_ENABLE PWMCON1|=0x20
//#define PWM_GP_MODE_DISABLE PWMCON1&=0xDF
////--------- PMW interrupt setting ------------------------------
//#define PWM_FALLING_INT PWMCON0&=0xF3
//#define PWM_RISING_INT PWMCON0|=0x04;PWMCON0&=0xF7
//#define PWM_CENTRAL_POINT_INT PWMCON0|=0x08;PWMCON0&=0xFB
//#define PWM_PERIOD_END_INT PWMCON0|=0x0C
////--------- PWM interrupt pin select ---------------------------
//#define PWM_INT_PWM0 PWMCON0&=0xFC
//#define PWM_INT_PWM2 PWMCON0|=0x01;PWMCON0&=0xFD
//#define PWM_INT_PWM4 PWMCON0|=0x02;PWMCON0&=0xFE
//#define PWM_INT_PMW6 PWMCON0|=0x03
////--------- PWM Dead time setting ------------------------------
//#define PWM45_DEADTIME_ENABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;PDTEN|=0x04;EA=BIT_TMP
//#define PWM34_DEADTIME_ENABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;PDTEN|=0x02;EA=BIT_TMP
//#define PWM01_DEADTIME_ENABLE BIT_TMP=EA;EA=0;TA=0xAA;TA=0x55;PDTEN|=0x01;EA=BIT_TMP
#endif
/************************************************************************************************************
* PWM interrupt subroutine
************************************************************************************************************/
void PWM_ISR (void) interrupt 13
{
clr_PWMF; // clear PWM interrupt flag
P12 = ~P12; // GPIO1 show PWM INT
}
/************************************************************************************************************
* Main function
************************************************************************************************************/
void main(void)
{
Set_All_GPIO_Quasi_Mode;
/**********************************************************************
PWM frequency = Fpwm/((PWMPH,PWMPL) + 1) <Fpwm = Fsys/PWM_CLOCK_DIV>
= (22.1184MHz/8)/(0x3FF + 1)
= 2.7KHz
***********************************************************************/
PWM2_P10_OUTPUT_ENABLE;
PWM_INT_PWM2;
PWM_FALLING_INT; //Setting Interrupt happen when PWM0 falling signal
PWM_CLOCK_DIV_8;
PWMPH = 0x03; //Setting PWM period
PWMPL = 0xFF;
PWM2H = 0x01; //PWM0 high duty = 1/2 PWM period
PWM2L = 0xFF;
set_EPWM; //Enable PWM interrupt
set_EA;
set_LOAD;
set_PWMRUN;
while(1);
}
| 
楼主
标题置顶
标题高亮
