luokanx 发表于 2016-12-28 17:13:14

F103求助USART3无法工作，MDK仿真能够输出，但板子不能打印

代码如下：那位大神指点一下啊~


#include "stm32f10x.h"
#include "stdio.h"

void delay(__IO u32 nCount);

int main(void)
{
        /* USART1 config 115200 8-N-1 */
USART3_Config();

printf("\r\nSTM32f103 USART1 test");
       
//USART3_Config();

        while(1)
        {
printf("\r\n TM32f103 USART3 test \r\n");
       
//        for (;;) {
//}
}


       
        }


       
void delay(__IO u32 nCount)
{
        for (; nCount != 0; nCount--);
}




void USART3_Config(void)
{
        GPIO_InitTypeDef GPIO_InitStructure;
        USART_InitTypeDef USART_InitStructure;
       
        /* config USART3 clock */
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3 | RCC_APB2Periph_GPIOB, ENABLE);
       

       
        /* USART3 GPIO config */
        /* Configure USART3 Tx (PB.10) as alternate function push-pull */
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOB, &GPIO_InitStructure);   
        /* Configure USART3 Rx (PB.11) as input floating */
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
       
/* USART3 mode config */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART3, &USART_InitStructure);
       

       
        /* ʹÄÜ´®¿Ú3½ÓÊÕÖÐ¶Ï */
        USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
       
        USART_Cmd(USART3, ENABLE);
}



//ÅäÖÃUSART3½ÓÊÕÖжÏ
void NVIC_Configuration(void)
{
        NVIC_InitTypeDef NVIC_InitStructure;
        /* Configure the NVIC Preemption Priority Bits */
        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);
       
        /* Enable the USARTy Interrupt */
        NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;       
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
}




void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
{
uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;

/* Check the parameters */
assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));
assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));

if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
{
    /* Compute the Corresponding IRQ Priority --------------------------------*/   
    tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;
    tmppre = (0x4 - tmppriority);
    tmpsub = tmpsub >> tmppriority;

    tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
    tmppriority |=NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
    tmppriority = tmppriority << 0x04;

    NVIC->IP = tmppriority;

    /* Enable the Selected IRQ Channels --------------------------------------*/
    NVIC->ISER =
      (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
}
else
{
    /* Disable the Selected IRQ Channels -------------------------------------*/
    NVIC->ICER =
      (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
}
}




#define AIRCR_VECTKEY_MASK    ((uint32_t)0x05FA0000)


void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)
{
/* Check the parameters */
assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup));

/* Set the PRIGROUP bits according to NVIC_PriorityGroup value */
SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;
}


/// Öض¨Ïòc¿âº¯Êýprintfµ½USART3
int fputc(int ch, FILE *f)
{
                /* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½USART3 */
                USART_SendData(USART3, (uint8_t) ch);
               
                /* µÈ´ý·¢ËÍÍê±Ï */
                while (USART_GetFlagStatus(USART3, USART_FLAG_TC) == RESET);               
       
                return (ch);
}

/// Öض¨Ïòc¿âº¯Êýscanfµ½USART3
int fgetc(FILE *f)
{
                /* µÈ´ý´®¿Ú1ÊäÈëÊý¾Ý */
                while (USART_GetFlagStatus(USART3, USART_FLAG_RXNE) == RESET);

                return (int)USART_ReceiveData(USART3);
}
/*********************************************END OF FILE**********************/






luokanx 发表于 2016-12-29 14:48:52

原来是在GPIO Config()里面没有开启总线时钟，里面加上这句就可以了。
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE);

海迹天涯 发表于 2016-12-28 17:53:26

无能为力帮你顶个帖子吧

luokanx 发表于 2016-12-28 20:05:40

:'(:'(:'(:'(:'(:'(:'(:'(:'(:'(:'(:'(:'(:'(:'(大神呢

五哥1 发表于 2016-12-29 02:37:18

你把那些乱码处理下，没法看

黑皮男 发表于 2016-12-29 09:01:51

没有把复用功能映射到IO口吧，有一个GPIO_PinAFConfig函数就是这个功能，可以试试

andypanfan 发表于 2016-12-29 09:11:29

你这个代码哎:(:(:(:(:(:(:(:(:(:(:(:(:(

luokanx 发表于 2016-12-29 11:34:41

黑皮男 发表于 2016-12-29 09:01
没有把复用功能映射到IO口吧，有一个GPIO_PinAFConfig函数就是这个功能，可以试试 ...

我用的是LQFP48脚封装的，不需要开吧！等会我开了试试。

luokanx 发表于 2016-12-29 11:37:58

重新整理了一下。

#include "stm32f10x.h"
#include "stdio.h"
#include "misc.h"
#include "led.h"

void delay(__IO u32 nCount);
void GPIO_Config(void);
void USART3_Config(void);


int main(void)
{
       
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3 | RCC_APB2Periph_GPIOB,ENABLE);
        GPIO_Config();
        USART3_Config();
       
        while(1)
        {
               
                printf("adsfsfsfsfs");
               
        }
       
//        return (1);
       
        }


void delay(__IO u32 nCount)

{
        for (; nCount != 0; nCount--);
}


void GPIO_Config(void)
{
        GPIO_InitTypeDef GPIO_InitStructure;
/* Configure USART3 Tx (PB.10) as alternate function push-pull */
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOB, &GPIO_InitStructure);   
        /* Configure USART3 Rx (PB.11) as input floating */
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void USART3_Config(void)
{
        USART_InitTypeDef USART_InitStructure;
        //* USART3 mode config */
USART_InitStructure.USART_BaudRate =9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART3, &USART_InitStructure);
       
        USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
       
        USART_Cmd(USART3, ENABLE);

}


int fputc(int ch, FILE *f)
{
               
                USART_SendData(USART3, (uint8_t) ch);
               
               
                while (USART_GetFlagStatus(USART3, USART_FLAG_TC) == RESET);               
       
                return (ch);
}


int fgetc(FILE *f)
{
               
                while (USART_GetFlagStatus(USART3, USART_FLAG_RXNE) == RESET);

                return (int)USART_ReceiveData(USART3);
}

luokanx 发表于 2016-12-29 11:41:54

如上所述，仿真的时候能够通过，也有打印消息输出，但连上芯片，芯片都没有打印输出。还发现了一个问题，就是仿真的时候如果波特率设置为115200在MDK仿真里面显示的是115384，如果设置为9600，仿真显示结果正常。为什么啊？求指点。

luokanx 发表于 2016-12-29 11:43:27

五哥1 发表于 2016-12-29 02:37
你把那些乱码处理下，没法看

重新整理了一下，在9楼，10楼有进一步的描述，麻烦帮我看一下呗。
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