stm32f207zg uart1配置

**
******************************************************************************
* @file    Project/STM32F2xx_StdPeriph_Template/main.c
* @author MCD Application Team
* @version V1.1.0
* @date    13-April-2012
* @brief   Main program body
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
*        http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include<stdio.h>
#include "stm32f2xx.h"
#include "stm322xg_eval.h"
/** @addtogroup Template_Project
* @{
*/

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define MESSAGE1   "     STM32F2xx      "
#define MESSAGE2   " Device running on "
#define MESSAGE3   "   STM322xG-EVAL    "

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static __IO uint32_t TimingDelay;

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/**
* @brief Main program.
* @param None
* @retval None
*/
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
USART_GetFlagStatus(USART1, USART_FLAG_TC);
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (uint8_t) ch);

/* Loop until the end of transmission */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{}

return ch;
}

void RCC_Configuration(void)
{
RCC_DeInit();              //RCC寄存器初始化
RCC_HSEConfig(RCC_HSE_ON); //使用外部时钟
if(RCC_WaitForHSEStartUp() == SUCCESS) //等待外部时钟启动
{
    RCC_PLLCmd(DISABLE);                    //配置PLL前应先关闭主PLL
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //选择PLL时钟为系统时钟     RCC_HCLKConfig(RCC_SYSCLK_Div1);     //HCLK(AHB)时钟为系统时钟1分频
    RCC_PCLK1Config(RCC_HCLK_Div4);     //PCLK1(APB1)时钟为HCLK时钟8分频，则TIM2时钟为HCLK时钟4分频
    RCC_PCLK2Config(RCC_HCLK_Div2);     //PCLK2(APB2)时钟为HCLK时钟2分频
    RCC_PLLConfig(RCC_PLLSource_HSE, 25, 336, 2, 7); //PLL时钟配置，公式详见‘system_stm43f4xx.c’ Line149
     RCC_PLLCmd(ENABLE);        //PLL时钟开启
     while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) { } //等待PLL时钟准备好
   }
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA, ENABLE );
   /* Connect PXx to USARTx_Tx*/
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);

/* Connect PXx to USARTx_Rx*/
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);

// RCC_APB2PeriphClockCmd( USART1, ENABLE );
   /* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;     // 选中管脚9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);     // 选择A端口

/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
//IO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;/
GPIO_Init(GPIOA, &GPIO_InitStructure);

}
void USART1_Configuration(void)
{

USART_InitTypeDef USART_InitStructure;
USART_DeInit(USART1);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );

USART_InitStructure.USART_BaudRate = 115200;        // 波特率为：115200
USART_InitStructure.USART_WordLength = USART_WordLength_8b;     // 8位数据
USART_InitStructure.USART_StopBits = USART_StopBits_1;      // 在帧结尾传输1个停止位
USART_InitStructure.USART_Parity = USART_Parity_No ;      // 奇偶失能
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; // 硬件流控制失能
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;    // 发送使能+接收使能
/* Configure USART1 basic and asynchronous paramters */
USART_Init(USART1, &USART_InitStructure);
//USART1->BRR=0x0139; //选择A端口
USART_Cmd(USART1, ENABLE);       //USART1总开关：开启
}

int main(void)
{
RCC_Configuration();
SystemCoreClockUpdate();
GPIO_Configuration();
USART1_Configuration();
while(1)
{
printf("风萧萧兮易水寒，壮士一去兮不复还\r\n");
printf("屈原：离骚\r\n");
}
}

/**
* @brief Inserts a delay time.
* @param nTime: specifies the delay time length, in 10 ms.
* @retval None
*/
void Delay(__IO uint32_t nTime)
{
TimingDelay = nTime;

while(TimingDelay != 0);
}

/**
* @brief Decrements the TimingDelay variable.
* @param None
* @retval None
*/
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}

#ifdef USE_FULL_ASSERT

/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

/* Infinite loop */
while (1)
{
}
}
#endif

/**
* @}
*/

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

在此芯片上串口1和gpio不在同一个总线上，配置时注意，此程序在意法公司stm32f2xx库之上进行配置，函数简单明确；

stm32f207zg uart1配置

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