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/******************************************************************************
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* Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD.
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*
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*-----------------------------------------------------------------------------
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* File: fm25v02.c
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* Description: FRAM operation code
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* Author: Lishoujian (867693272@qq.com)
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* Date: Jan 8, 2015
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*****************************************************************************/
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/* ----------------------- Platform includes --------------------------------*/
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#include "PWM.h"
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#include "sys.h"
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/******************************************
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* func: PWM1_out
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* desc: set pwm1
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* input:
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* - period: period clk num
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* - count : duty clk num (set duty cycle)
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* - div : frequence division - 1
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* output: eg: when period = 1000,count=500,div=71,cpu_freq = 72MHZ then => period time = 1000us & duty = 50%
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* return: none
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*****************************************/
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void PWM1_out(uint16 period,uint16 div)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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TIM_OCInitTypeDef TIM_OCInitStructure;
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TIM_DeInit(TIM4);
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RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM4 , ENABLE ); //TIM3£¬TIM4
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RCC_APB2PeriphClockCmd( RCC_APB2Periph_AFIO, ENABLE);
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GPIO_PinRemapConfig(GPIO_Remap_TIM4,ENABLE);
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/* Time base configuration */
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TIM_TimeBaseStructure.TIM_Period = period-1; //¼ÆÊýµ½B´Î£¬ÎªÒ»¸ö¶¨Ê±ÖÜÆÚ
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TIM_TimeBaseStructure.TIM_Prescaler = div-1; //ÉèÖÃÔ¤·ÖƵ
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TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ; //ÉèÖÃʱÖÓ·ÖƵϵÊý£º²»·ÖƵ
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //ÏòÉϼÆÊýģʽ
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TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
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/* PWM1 Mode configuration: Channel3 */
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TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //ÅäÖÃΪPWMģʽ1
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TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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TIM_OCInitStructure.TIM_Pulse = period/2; //ÉèÖÃÌø±äÖµ£¬µ±¼ÆÊýÆ÷¼ÆÊýµ½Õâ¸öֵʱ£¬µçƽ·¢ÉúÌø±ä
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TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //
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TIM_OC2Init(TIM4, &TIM_OCInitStructure); //ʹÄÜͨµÀ3
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TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable); //ʹÄÜͨµÀ3±È½Ï¼Ä´æÆ÷
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TIM_ARRPreloadConfig(TIM4, ENABLE); // ʹÄÜTIM8ÖØÔؼĴæÆ÷ARR
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TIM_Cmd(TIM4, ENABLE); //ʹÄܶ¨Ê±Æ÷8
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}
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/******************************************
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* func: µ¥Âö³åÐÎʽ TIM3 CH1
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* desc: set pwm3
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* input:
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* - period: period
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* - count : set duty cycle
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* - div : frequence division
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* output: none
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* return: none
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*****************************************/
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/*12MµÄʱÖÓ*/
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void pluse_init_out(uint8 pluse_enable, uint16 pluse_wide)
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{
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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TIM_OCInitTypeDef TIM_OCInitStructure;
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TIM_DeInit(TIM3);
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RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM3 , ENABLE ); //TIM3£¬TIM4
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RCC_APB2PeriphClockCmd( RCC_APB2Periph_AFIO, ENABLE);
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GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3,ENABLE);
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/* Time base configuration */
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TIM_TimeBaseStructure.TIM_Period = 1000; //¼ÆÊýµ½B´Î£¬ÎªÒ»¸ö¶¨Ê±ÖÜÆÚ
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TIM_TimeBaseStructure.TIM_Prescaler = 3000; //ÉèÖÃÔ¤·ÖƵ
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TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV4 ; //ÉèÖÃʱÖÓ·ÖƵϵÊý£º²»·ÖƵ
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //ÏòÉϼÆÊýģʽ
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TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
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/* pluse Mode configuration: Channel3 */
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TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //ÅäÖÃΪPWMģʽ1
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TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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TIM_OCInitStructure.TIM_Pulse = pluse_wide; //ÉèÖÃÌø±äÖµ£¬µ±¼ÆÊýÆ÷¼ÆÊýµ½Õâ¸öֵʱ£¬µçƽ·¢ÉúÌø±ä
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TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //
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TIM_OC2Init(TIM3, &TIM_OCInitStructure); //ʹÄÜͨµÀ3
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TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable); //ʹÄÜͨµÀ3±È½Ï¼Ä´æÆ÷
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TIM_SelectOnePulseMode(TIM3, TIM_OPMode_Single);
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TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Trigger);
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TIM_Cmd(TIM3, ENABLE);
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}
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