本帖最后由 路雨潇潇ll 于 2019-5-7 12:55 编辑
USART2不开定时器1可以使用，开启定时器1的四路pwm输出后，串口不正常工作了，无法发送数据或着乱码，看了一下没有共用的IO口。就是不知道哪里出了问题了，原子哥大神们能帮忙看下吗？这是串口的
[mw_shl_code=c,true]
#include "usart.h"
/**
* @brief 配置嵌套向量中断控制器NVIC
* @param 无
* @retval 无
*/
static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* 嵌套向量中断控制器组选择 */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
/* 配置USART为中断源 */
NVIC_InitStructure.NVIC_IRQChannel = DEBUG_USART_IRQ;
/* 抢断优先级*/
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
/* 子优先级 */
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
/* 使能中断 */
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
/* 初始化配置NVIC */
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief USART GPIO 配置,工作参数配置
* @param 无
* @retval 无
*/
void USART_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
// 打开串口GPIO的时钟
DEBUG_USART_GPIO_APBxClkCmd(DEBUG_USART_GPIO_CLK, ENABLE);
// 打开串口外设的时钟
DEBUG_USART_APBxClkCmd(DEBUG_USART_CLK, ENABLE);
// 将USART Tx的GPIO配置为推挽复用模式
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_TX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(DEBUG_USART_TX_GPIO_PORT, &GPIO_InitStructure);
// 将USART Rx的GPIO配置为浮空输入模式
GPIO_InitStructure.GPIO_Pin = DEBUG_USART_RX_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(DEBUG_USART_RX_GPIO_PORT, &GPIO_InitStructure);
// 配置串口的工作参数
// 配置波特率
USART_InitStructure.USART_BaudRate = DEBUG_USART_BAUDRATE;
// 配置 针数据字长
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
// 配置停止位
USART_InitStructure.USART_StopBits = USART_StopBits_1;
// 配置校验位
USART_InitStructure.USART_Parity = USART_Parity_No ;
// 配置硬件流控制
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
// 配置工作模式，收发一起
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
// 完成串口的初始化配置
USART_Init(DEBUG_USARTx, &USART_InitStructure);
// 串口中断优先级配置
NVIC_Configuration();
// 使能串口接收中断
USART_ITConfig(DEBUG_USARTx, USART_IT_RXNE, ENABLE);
// 使能串口
USART_Cmd(DEBUG_USARTx, ENABLE);
// 清除发送完成标志
USART_ClearFlag(USART2, USART_FLAG_TC);
}
/***************** 发送一个字符 **********************/
void Usart_SendByte( USART_TypeDef * pUSARTx, uint8_t ch)
{
/* 发送一个字节数据到USART */
USART_SendData(pUSARTx,ch);
/* 等待发送数据寄存器为空 */
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
}
/***************** 发送字符串 **********************/
void Usart_SendString( USART_TypeDef * pUSARTx, char *str)
{
unsigned int k=0;
do
{
Usart_SendByte( pUSARTx, *(str + k) );
k++;
} while(*(str + k)!=' ');
/* 等待发送完成 */
while(USART_GetFlagStatus(pUSARTx,USART_FLAG_TC)==RESET)
{}
}
/***************** 发送一个16位数 **********************/
void Usart_SendHalfWord( USART_TypeDef * pUSARTx, uint16_t ch)
{
uint8_t temp_h, temp_l;
/* 取出高八位 */
temp_h = (ch&0XFF00)>>8;
/* 取出低八位 */
temp_l = ch&0XFF;
/* 发送高八位 */
USART_SendData(pUSARTx,temp_h);
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
/* 发送低八位 */
USART_SendData(pUSARTx,temp_l);
while (USART_GetFlagStatus(pUSARTx, USART_FLAG_TXE) == RESET);
}
///重定向c库函数printf到串口，重定向后可使用printf函数
int fputc(int ch, FILE *f)
{
/* 发送一个字节数据到串口 */
USART_SendData(DEBUG_USARTx, (uint8_t) ch);
/* 等待发送完毕 */
while (USART_GetFlagStatus(DEBUG_USARTx, USART_FLAG_TXE) == RESET);
return (ch);
}
///重定向c库函数scanf到串口，重写向后可使用scanf、getchar等函数
int fgetc(FILE *f)
{
/* 等待串口输入数据 */
while (USART_GetFlagStatus(DEBUG_USARTx, USART_FLAG_RXNE) == RESET);
return (int)USART_ReceiveData(DEBUG_USARTx);
}
void DEBUG_USART_IRQHandler(void)
{
uint8_t ucTemp;
if(USART_GetITStatus(DEBUG_USARTx,USART_IT_RXNE)!=RESET)
{
ucTemp = USART_ReceiveData(DEBUG_USARTx);
USART_SendData(DEBUG_USARTx,ucTemp);
}
}
[/mw_shl_code]
[mw_shl_code=c,true]#include "timer.h"
#include "led.h"
//#include "usart.h"
void TIM1_GPIO_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE); //时钟使能
//*******************************************//pwm输出
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8 ;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);//初始化GPIO
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9 ;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);//初始化GPIO
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10 ;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);//初始化GPIO
//**************************************//互补pwm输出
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13 ;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);//初始化GPIO
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_14 ;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);//初始化GPIO
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_15 ;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);//初始化GPIO
}
//这里时钟选择为APB1的2倍，而APB1为36M
//arr：自动重装值。
//psc：时钟预分频数
//这里使用的是定时器3!
void TIM1_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 , ENABLE); //时钟使能
TIM_TimeBaseStructure.TIM_Period=arr;
TIM_TimeBaseStructure.TIM_Prescaler=psc;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1 ;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;//重复计数值
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);
TIM_OCInitStruct.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStruct.TIM_OCIdleState=TIM_OCNIdleState_Reset;
TIM_OCInitStruct.TIM_OCNIdleState=TIM_OCNIdleState_Reset;
TIM_OCInitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_OCNPolarity=TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_OutputNState=TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_Pulse=1800-1;
TIM_OC1Init(TIM1,&TIM_OCInitStruct);
TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OCInitStruct.TIM_Pulse=1800-1;
TIM_OC2Init(TIM1,&TIM_OCInitStruct);
TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OCInitStruct.TIM_Pulse=1800-1;
TIM_OC3Init(TIM1,&TIM_OCInitStruct);
TIM_OC3PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1,ENABLE);//使能重装载寄存器ARR
TIM_Cmd(TIM1,ENABLE);//使能定时器
TIM_CtrlPWMOutputs(TIM1,DISABLE);//先禁用pwm输出
}
void TIM1_PWM_init(int pwm_frequency)
{
TIM1_GPIO_init();
TIM1_Int_Init(((uint16_t)(1000000/pwm_frequency))-1,72-1);
}
//i电机编号 direction是方向
void PWM_CONTROL(u16 i,u16 direction,u16 speed)
{
switch (i)
{
case 1:
if(direction==1)
{
TIM_CCxCmd(TIM1,TIM_Channel_1,TIM_CCx_Enable);
TIM_CCxNCmd(TIM1,TIM_Channel_1,TIM_CCxN_Disable);
}
else if(direction==2)
{
TIM_CCxCmd(TIM1,TIM_Channel_1,TIM_CCx_Disable);
TIM_CCxNCmd(TIM1,TIM_Channel_1,TIM_CCxN_Enable);
}
else
{
TIM_CCxCmd(TIM1,TIM_Channel_1,TIM_CCx_Disable);
TIM_CCxNCmd(TIM1,TIM_Channel_1,TIM_CCxN_Disable);
}
TIM_SetCompare1(TIM1,speed);
break;
case 2:
if(direction==1)
{
TIM_CCxCmd(TIM1,TIM_Channel_2,TIM_CCx_Enable);
TIM_CCxNCmd(TIM1,TIM_Channel_2,TIM_CCxN_Disable);
}
else if(direction==2)
{
TIM_CCxCmd(TIM1,TIM_Channel_2,TIM_CCx_Disable);
TIM_CCxNCmd(TIM1,TIM_Channel_2,TIM_CCxN_Enable);
}
else
{
TIM_CCxCmd(TIM1,TIM_Channel_2,TIM_CCx_Disable);
TIM_CCxNCmd(TIM1,TIM_Channel_2,TIM_CCxN_Disable);
}
TIM_SetCompare2(TIM1,speed);
break;
case 3:
if(direction==1)
{
TIM_CCxCmd(TIM1,TIM_Channel_3,TIM_CCx_Enable);
TIM_CCxNCmd(TIM1,TIM_Channel_3,TIM_CCxN_Disable);
}
else if(direction==2)
{
TIM_CCxCmd(TIM1,TIM_Channel_3,TIM_CCx_Disable);
TIM_CCxNCmd(TIM1,TIM_Channel_3,TIM_CCxN_Enable);
}
else
{
TIM_CCxCmd(TIM1,TIM_Channel_3,TIM_CCx_Disable);
TIM_CCxNCmd(TIM1,TIM_Channel_3,TIM_CCxN_Disable);
}
TIM_SetCompare3(TIM1,speed);
break;
case 4:
TIM_CtrlPWMOutputs(TIM1,ENABLE); // 使能输出PWM，开始转动
break;
case 5:
TIM_CtrlPWMOutputs(TIM1,DISABLE); // 停止输出PWM，停机
break;
default:
TIM_CtrlPWMOutputs(TIM1,DISABLE); // 停止输出PWM，停机
break;
}
}
[/mw_shl_code][mw_shl_code=c,true]#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "usart.h"
#include "timer.h"
#include "HALLSENSOR.h"
extern void SystemInit(void);
int main(void)
{
u32 num=0,key;
SystemInit();
// KEY_Init(); //IO初始化
delay_init(); //延时函数初始化
// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
LED_Init(); //LED端口初始化
TIM1_PWM_init(50);
USART_Config();
KEY_Scan(0);
TIM_CtrlPWMOutputs(TIM1,ENABLE); // 使能输出PWM // 主输出使能，当使用的是通用定时器时，这句不需要
delay_ms(10);
TIM_SetCompare1(TIM1,19000);
TIM_CCxCmd(TIM1,TIM_Channel_1,TIM_CCx_Enable);
TIM_CCxNCmd(TIM1,TIM_Channel_1,TIM_CCxN_Enable);
TIM_CCxCmd(TIM1,TIM_Channel_2,TIM_CCx_Enable); //使用此函数之前需要 先使能pwm输出 TIM_CtrlPWMOutputs
TIM_CCxNCmd(TIM1,TIM_Channel_2,TIM_CCxN_Enable);
TIM_CCxCmd(TIM1,TIM_Channel_3,TIM_CCx_Enable);
TIM_CCxNCmd(TIM1,TIM_Channel_3,TIM_CCxN_Enable);
Usart_SendString( DEBUG_USARTx,"这是一个串口中断接收回显实验
");
while(1)
{
LED1=!LED1;
delay_ms(500);
Usart_SendHalfWord(USART2,0x16);
Usart_SendString(USART2,"1234");
//printf("124");
}
}
[/mw_shl_code]
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