4pwm.c

自己工作之初开发的小小程序

#include "hw_types.h"
#include "hw_memmap.h"
#include "hw_ints.h"
#include "hw_gpio.h"
#include "hw_pwm.h"

#include "src\sysctl.h"
#include "src\systick.h"
#include "src\debug.h"
#include "src\gpio.h"
#include "src\pwm.h"

int main(void)
{
  SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_OSC_MAIN|SYSCTL_XTAL_6MHZ); //40MHZ clock
  SysCtlPWMClockSet(SYSCTL_PWMDIV_1); //40MHZ PWM CLOCK
  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
  SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM);
  GPIOPinTypePWM(GPIO_PORTB_BASE,GPIO_PIN_0|GPIO_PIN_1);
  GPIOPinTypePWM(GPIO_PORTD_BASE,GPIO_PIN_0|GPIO_PIN_1);
  PWMGenConfigure(PWM_BASE,PWM_GEN_0,PWM_GEN_MODE_UP_DOWN|PWM_GEN_MODE_NO_SYNC);
  PWMGenConfigure(PWM_BASE,PWM_GEN_1,PWM_GEN_MODE_DOWN|PWM_GEN_MODE_NO_SYNC);
  PWMGenPeriodSet(PWM_BASE,PWM_GEN_0,8000); //PWM PERIOD
  PWMGenPeriodSet(PWM_BASE,PWM_GEN_1,8000); //PWM PERIOD
  PWMPulseWidthSet(PWM_BASE,PWM_OUT_0,4000);
  PWMPulseWidthSet(PWM_BASE,PWM_OUT_1,0);
  PWMPulseWidthSet(PWM_BASE,PWM_OUT_2,4000);
  PWMPulseWidthSet(PWM_BASE,PWM_OUT_3,0);
  PWMDeadBandEnable(PWM_BASE,PWM_GEN_0,2000,2000);
  PWMDeadBandEnable(PWM_BASE,PWM_GEN_1,0,0);
 // PWMDeadBandDisable(PWM_BASE,PWM_GEN_1);
 // PWMGenConfigure(PWM_BASE,PWM_GEN_0,PWM_GEN_MODE_UP_DOWN|PWM_GEN_MODE_SYNC);
 // PWMGenConfigure(PWM_BASE,PWM_GEN_1,PWM_GEN_MODE_DOWN|PWM_GEN_MODE_SYNC);
  PWMOutputState(PWM_BASE,PWM_OUT_0_BIT|PWM_OUT_1_BIT,true);
  PWMOutputState(PWM_BASE,PWM_OUT_2_BIT|PWM_OUT_3_BIT,true);
  PWMGenEnable(PWM_BASE,PWM_GEN_0);
  PWMGenEnable(PWM_BASE,PWM_GEN_1);
    while(1);
}