我以前在F1上用的好好的,今天移植到F4上就不行了。定时器配置一点没改,就是GPIO方面做了改动,怎么都没有波形。而且在测PA8的时候测到了频率16MHz的奇怪的波形以下是代码
#include "bsp-cPwm.h"
TIM_OCInitTypeDef TIM_OCInitStructure;
void ADVANCE_TIM_GPIO_Config(void) //初始化定时器的输出GPIO
{
GPIO_InitTypeDef GPIO_InitStructure;
// 输出比较通道 GPIO 初始化
RCC_AHB1PeriphClockCmd(ADVANCE_TIM_CH1_GPIO_CLK, ENABLE);
GPIO_PinAFConfig(ADVANCE_TIM_CH1_PORT,ADVANCE_TIM_CH1_PIN,GPIO_AF_TIM1);
GPIO_InitStructure.GPIO_Pin = ADVANCE_TIM_CH1_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(ADVANCE_TIM_CH1_PORT, &GPIO_InitStructure);
// 输出比较通道互补通道 GPIO 初始化
RCC_AHB1PeriphClockCmd(ADVANCE_TIM_CH1N_GPIO_CLK, ENABLE);
GPIO_PinAFConfig(ADVANCE_TIM_CH1N_PORT,ADVANCE_TIM_CH1N_PIN,GPIO_AF_TIM1);
GPIO_InitStructure.GPIO_Pin = ADVANCE_TIM_CH1N_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(ADVANCE_TIM_CH1N_PORT, &GPIO_InitStructure);
// 输出比较通道刹车通道 GPIO 初始化
RCC_AHB1PeriphClockCmd(ADVANCE_TIM_BKIN_GPIO_CLK, ENABLE);
GPIO_PinAFConfig(ADVANCE_TIM_BKIN_PORT,ADVANCE_TIM_BKIN_PIN,GPIO_AF_TIM1);
GPIO_InitStructure.GPIO_Pin = ADVANCE_TIM_BKIN_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(ADVANCE_TIM_BKIN_PORT, &GPIO_InitStructure);
// BKIN引脚默认先输出低电平
GPIO_ResetBits(ADVANCE_TIM_BKIN_PORT,ADVANCE_TIM_BKIN_PIN);
}
/* ---------------- PWM信号 周期和占空比的计算--------------- */
// ARR :自动重装载寄存器的值
// CLK_cnt:计数器的时钟,等于 Fck_int / (psc+1) = 168M/(psc+1)
// PWM 信号的周期 T = (ARR+1) * (1/CLK_cnt) = (ARR+1)*(PSC+1) / 168M
// 占空比P=CCR/(ARR+1)
//static void ADVANCE_TIM_Mode_Config(void) //初始化定时器base配置与输出OC
void ADVANCE_TIM_Mode_Config(void) //初始化定时器base配置与输出OC
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
// 开启定时器时钟,即内部时钟CK_INT=168M
ADVANCE_TIM_APBxClock_FUN(ADVANCE_TIM_CLK,ENABLE);
/*--------------------时基结构体初始化-------------------------*/
//TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
// 自动重装载寄存器的值,累计TIM_Period+1个频率后产生一个更新或者中断
TIM_TimeBaseStructure.TIM_Period = ADVANCE_TIM_PERIOD; //有的厂家直接写为ARR
// 驱动CNT计数器的时钟 = Fck_int/(psc+1)
TIM_TimeBaseStructure.TIM_Prescaler = ADVANCE_TIM_PSC;
// 时钟分频因子 ,配置死区时间时需要用到
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
// 计数器计数模式,设置为向上计数
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
// 重复计数器的值,没用到不用管
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;
// 初始化定时器
TIM_TimeBaseInit(ADVANCE_TIM, &TIM_TimeBaseStructure);
/*--------------------输出比较结构体初始化-------------------*/
//TIM_OCInitTypeDef TIM_OCInitStructure;
// 配置为PWM模式1
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
// 输出使能
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// 互补输出使能
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
// 设置占空比大小
TIM_OCInitStructure.TIM_Pulse = ADVANCE_TIM_PULSE;
// 输出通道电平极性配置
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
// 互补输出通道电平极性配置
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
// 输出通道空闲电平极性配置
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
// 互补输出通道空闲电平极性配置
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
TIM_OC1Init(ADVANCE_TIM, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(ADVANCE_TIM, TIM_OCPreload_Enable); //自动重装载
/*-------------------刹车和死区结构体初始化-------------------*/
// 有关刹车和死区结构体的成员具体可参考BDTR寄存器的描述
//TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
// 输出比较信号死区时间配置,具体如何计算可参考 BDTR:UTG[7:0]的描述
// 这里配置的死区时间为152ns?
TIM_BDTRInitStructure.TIM_DeadTime = 20;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
// 当BKIN引脚检测到高电平的时候,输出比较信号被禁止,就好像是刹车一样
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(ADVANCE_TIM, &TIM_BDTRInitStructure);
// 使能计数器
TIM_Cmd(ADVANCE_TIM, ENABLE);
// 主输出使能,当使用的是通用定时器时,这句不需要
TIM_CtrlPWMOutputs(ADVANCE_TIM, ENABLE);
}
void ADVANCE_TIM_Init(void) //将以上两个初始化函数合并入一个函数
{
//ComplementaryPwm
ADVANCE_TIM_GPIO_Config();
ADVANCE_TIM_Mode_Config(); //初始化定时器base配置与输出OC
}
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