传一个在proteus8.0实现的pwm例子

平湖秋月

传一个在proteus8.0实现的pwm例子 [复制链接]

//*****************************************************************************
//没有板子的童鞋可以用proteus玩ARM Cortex照样爽，有板子没外设的童鞋也可以这样玩！！！
//
//*****************************************************************************
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/debug.h"
#include "driverlib/gpio.h"
#include "driverlib/pwm.h"
#include "driverlib/sysctl.h"

//*****************************************************************************
//
//! \addtogroup example_list
//!

PWM (pwmgen)

//!
//! This example application utilizes the PWM peripheral to output a 25% duty
//! cycle PWM signal and a 75% duty cycle PWM signal, both at 50 kHz.  Once
//! configured, the application enters an infinite loop, doing nothing while
//! the PWM peripheral continues to output its signals.
//
//*****************************************************************************
//*****************************************************************************
//
// The error routine that is called if the driver library encounters an error.
//
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, unsigned long ulLine)
{
}
#endif
//*****************************************************************************
//
// This example demonstrates how to setup the PWM block to generate signals.
//
//*****************************************************************************
int
main(void)
{
    unsigned long ulPeriod;
    //
    // Set the clocking to run directly from the crystal.
    //
    SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_6MHZ);
    SysCtlPWMClockSet(SYSCTL_PWMDIV_1);

    //
    // Enable the peripherals used by this example.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM);
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    //
    // Set GPIO D0 and D1 as PWM pins.  They are used to output the PWM0 and
    // PWM1 signals.
    //
    GPIOPinTypePWM(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    //
    // Compute the PWM period based on the system clock.
    //
    ulPeriod = SysCtlClockGet() / 50000;
    //
    // Set the PWM period to 50 kHz.
    //
    PWMGenConfigure(PWM_BASE, PWM_GEN_0,
                    PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
    PWMGenPeriodSet(PWM_BASE, PWM_GEN_0, ulPeriod);
    //
    // Set PWM0 to a duty cycle of 25% and PWM1 to a duty cycle of 75%.
    //
    PWMPulseWidthSet(PWM_BASE, PWM_OUT_0, ulPeriod / 4);
    PWMPulseWidthSet(PWM_BASE, PWM_OUT_1, ulPeriod * 3 / 4);
    //
    // Enable the PWM0 and PWM1 output signals.
    //
    PWMOutputState(PWM_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, true);
    //
    // Enable the PWM generator.
    //
    PWMGenEnable(PWM_BASE, PWM_GEN_0);
    //
    // Loop forever while the PWM signals are generated.
    //
    while(1)
    {
    }
}
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2013-11-29 01:59 上传

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pwm.rar (27.31 KB, 下载次数: 15)

2013-11-29 01:59 上传

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[ 本帖最后由 平湖秋月 于 2013-11-29 01:59 编辑 ]

平湖秋月

youluo

牛逼啊。MARK一下