#include "system.h"

#include "SysTick.h"

#include "led.h"

#include "pwm.h"

int main()

{

u16 i=0;  

u16 j=0;

u16 k=0;

u16 m=0;

SysTick_Init(72);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);  //ÖD¶ÏóÅÏ輶·Ö×é ·Ö2×é

LED_Init();

TIM4_CH1_CH2_CH3_PWM_Init(200, 7200-1); //20ms

while(1)

{ 

i=25;//¶æ»ú1

j=25;//¶æ»ú2

k=5;//¶æ»ú3

m=15;//¶æ»ú4

 

TIM_SetCompare1(TIM4,i);

TIM_SetCompare2(TIM4,j); 

TIM_SetCompare3(TIM4,k); 

TIM_SetCompare4(TIM4,m);

delay_ms(10);

}

}

#include "pwm.h"

/*******************************************************************************

* oˉ êy Ãû         : TIM3_CH1_PWM_Init

* oˉêy1|Äü    : TIM3í¨μà1 PWM3õê¼»ˉoˉêy

* êä    èë         : per:ÖØ×°ÔØÖμ

psc:·ÖÆμÏμêy

* êä    3ö         : ÎT

*******************************************************************************/

void TIM4_CH1_CH2_CH3_PWM_Init(u16 per,u16 psc)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

GPIO_InitTypeDef GPIO_InitStructure;

/* ¿aÆôê±Öó */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);

/*  ********************ÅäÖÃGPIOμÄÄ￡ê½oíIO¿ú***********************************==*/

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_6|GPIO_Pin_7;//DèòaÆäËû¿úÔù¼ó

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;//¸′óÃíÆíìêä3ö

GPIO_Init(GPIOB,&GPIO_InitStructure);

TIM_TimeBaseInitStructure.TIM_Period=per;   //×Ô¶ˉ×°ÔØÖμ

TIM_TimeBaseInitStructure.TIM_Prescaler=psc; //·ÖÆμÏμêy

TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //éèÖÃÏòéϼÆêyÄ￡ê½

TIM_TimeBaseInit(TIM4,&TIM_TimeBaseInitStructure);

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;

TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;

TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;

TIM_OC1Init(TIM4,&TIM_OCInitStructure); //êä3ö±è½Ïí¨μà13õê¼»ˉ

TIM_OC2Init(TIM4,&TIM_OCInitStructure); //êä3ö±è½Ïí¨μà13õê¼»ˉ

TIM_OC3Init(TIM4,&TIM_OCInitStructure); //êä3ö±è½Ïí¨μà13õê¼»ˉ************************¼óIO¿úDèòaÔùìí¼óí¨μà

TIM_OC4Init(TIM4,&TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM4,TIM_OCPreload_Enable); //ê1ÄüTIMxÔú CCR1 éÏμÄԤװÔؼÄ′æÆ÷

TIM_OC2PreloadConfig(TIM4,TIM_OCPreload_Enable); //ê1ÄüTIMxÔú CCR1 éÏμÄԤװÔؼÄ′æÆ÷

TIM_OC3PreloadConfig(TIM4,TIM_OCPreload_Enable); //ê1ÄüTIMxÔú CCR1 éÏμÄԤװÔؼÄ′æÆ÷****************í¬ê±Õa±ßò2Dèòaìí¼ó

TIM_OC4PreloadConfig(TIM4,TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM4,ENABLE);//ê1ÄüԤװÔؼÄ′æÆ÷

TIM_Cmd(TIM4,ENABLE); //ê1Äü¶¨ê±Æ÷

}

void TIM_SetCompare1(TIM_TypeDef* TIMx, uint16_t Compare1)

{

  /* Check the parameters */

  assert_param(IS_TIM_LIST8_PERIPH(TIMx));

  /* Set the Capture Compare1 Register value */

  TIMx->CCR1 = Compare1;

}

/**

  * @brief  Sets the TIMx Capture Compare2 Register value

  * @param  TIMx: where x can be 1, 2, 3, 4, 5, 8, 9, 12 or 15 to select the TIM peripheral.

  * @param  Compare2: specifies the Capture Compare2 register new value.

  * @retval None

  */

void TIM_SetCompare2(TIM_TypeDef* TIMx, uint16_t Compare2)

{

  /* Check the parameters */

  assert_param(IS_TIM_LIST6_PERIPH(TIMx));

  /* Set the Capture Compare2 Register value */

  TIMx->CCR2 = Compare2;

}

void TIM_SetCompare3(TIM_TypeDef* TIMx, uint16_t Compare3)

{

  /* Check the parameters */

  assert_param(IS_TIM_LIST3_PERIPH(TIMx));

  /* Set the Capture Compare3 Register value */

  TIMx->CCR3 = Compare3;

}

/**

  * @brief  Sets the TIMx Capture Compare4 Register value

  * @param  TIMx: where x can be 1, 2, 3, 4, 5 or 8 to select the TIM peripheral.

  * @param  Compare4: specifies the Capture Compare4 register new value.

  * @retval None

  */

void TIM_SetCompare4(TIM_TypeDef* TIMx, uint16_t Compare4)

{

  /* Check the parameters */

  assert_param(IS_TIM_LIST3_PERIPH(TIMx));

  /* Set the Capture Compare4 Register value */

  TIMx->CCR4 = Compare4;

}