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TM4C123x程序小练：利用PWM模块产生占空比自动从0.1%到100%循环调节的PWM波

2018-8-15 07:38:09 2287 PWM

0 /*****************************************开发坏境:CCSv5程序功能:利用PWM模块产生占空比自动从0.1%到100%循环调节的PWM波程序说明:使用PWM模块0，PWM发生器0，输出为PWM0管脚，PB6 利用PWM中断******************************************/#include #include #include "inc/hw_ints.h"#include "inc/hw_memmap.h"#include "driverlib/gpio.h"#include "driverlib/interrupt.h"#include "driverlib/pin_map.h"#include "driverlib/pwm.h"#include "driverlib/sysctl.h"unsigned int PWM_Value=1852; //PWM占空比调节void PWM0IntHandler(void)[ PWMGenIntClear(PWM0_BASE, PWM_GEN_0, PWM_INT_CNT_LOAD); if((PWMPulseWidthGet(PWM0_BASE, PWM_OUT_0) + 64) <= (PWMGenPeriodGet(PWM0_BASE, PWM_GEN_0) )) [ PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, PWMPulseWidthGet(PWM0_BASE, PWM_OUT_0) + 64); ] else [ PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, 64); ]]int main(void)[ SysCtlClockSet(SYSCTL_SYSDIV_4 \| SYSCTL_USE_PLL \| SYSCTL_OSC_MAIN \| SYSCTL_XTAL_16MHZ); SysCtlPWMClockSet(SYSCTL_PWMDIV_1); SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0); SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB); GPIOPinConfigure(GPIO_PB6_M0PWM0); GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_6); PWMGenConfigure(PWM0_BASE, PWM_GEN_0, PWM_GEN_MODE_DOWN \| PWM_GEN_MODE_NO_SYNC); PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, PWM_Value);//250HZ PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, PWM_Value/2);//占空比0.1% IntMasterEnable(); PWMIntEnable(PWM0_BASE, PWM_INT_GEN_0); // Enable the PWM0 LOAD interrupt on PWM0. PWMGenIntTrigEnable(PWM0_BASE, PWM_GEN_0, PWM_INT_CNT_LOAD); IntEnable(INT_PWM0_0); PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT, true); PWMGenEnable(PWM0_BASE, PWM_GEN_0); while(1);] 0
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0 /*****************************************开发坏境:CCSv5程序功能:利用PWM模块产生占空比可调的带死区的PWM波程序说明:使用PWM模块0，PWM发生器0，输出为PWM0和PWM1管脚，分别为PB6，PB7******************************************/#include #include #include "inc/hw_memmap.h"#include "inc/hw_types.h"#include "driverlib/sysctl.h"#include "driverlib/rom.h"#include "driverlib/gpio.h"#include "driverlib/pwm.h"#include "driverlib/fpu.h"#include "driverlib/pin_map.h"int main (void)[ //long int PWM_Value=12500; //PWM占空比调节 //使能FPU FPUEnable(); FPULazyStackingEnable(); //设置系统时钟为16MHz SysCtlClockSet(SYSCTL_SYSDIV_1\|SYSCTL_USE_OSC\|SYSCTL_OSC_MAIN \|SYSCTL_XTAL_16MHZ); SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);//使能PWM0模块 SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);//使能PWM0和PWM1输出所在GPIO GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_6); GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_7);//配置PH0/PH1为PWM功能 GPIOPinConfigure(GPIO_PB6_M0PWM0); //#define GPIO_PB6_M0PWM0 0x00011804 GPIOPinConfigure(GPIO_PB7_M0PWM1); //#define GPIO_PB7_M0PWM1 0x00011C04 //驱动电流8MA，推挽输出 GPIOPadConfigSet(GPIO_PORTB_BASE, GPIO_PIN_6,GPIO_STRENGTH_8MA,GPIO_PIN_TYPE_STD); SysCtlPWMClockSet(SYSCTL_PWMDIV_64); // PWM时钟配置：不分频 //配置PWM发生器0：加减计数，不同步 PWMGenConfigure(PWM0_BASE,PWM_GEN_0,PWM_GEN_MODE_UP_DOWN\| PWM_GEN_MODE_NO_SYNC); //设置PWM发生器1的频率，时钟频率/PWM分频数/n，16M/64/5000=50HZ PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, 5000); //设置PWM0/PWM1输出的脉冲宽度 PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0,2500);//50%占空比 //PWMPulseWidthSet(PWM0_BASE, PWM_OUT_1, 500);//25%占空比 PWMDeadBandEnable(PWM0_BASE, PWM_GEN_0, 100, 100); //使能PWM0和PWM1的输出 PWMOutputState(PWM0_BASE, (PWM_OUT_0_BIT \|PWM_OUT_1_BIT), true); //使能PWM发生器 PWMGenEnable(PWM0_BASE, PWM_GEN_0); while(1) [ ]]

2018-8-15 07:48:07 评论举报 1^# 韦明