#include "stm32f10x_lib.h"
//#include "platform_config.h"
#define USART1_DR_Base 0x40013804
#define Sendbuff_size 35
vu8 TxBuffer[]= "111111111111111111111";
vu8 RxBuffer[];
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void DMA_Configuration(void);
void USART1_Configuration(void);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : main
* Description : Main program.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main(void)
{ u8 index=0;
#ifdef DEBUG
debug();
#endif
RCC_Configuration(); //配置系统时钟，设置系统时钟为72M
GPIO_Configuration();
NVIC_Configuration(); //配置中断
USART1_Configuration();
DMA_Configuration();
//这里是开始DMA传输前的一些准备工作，将USART1模块设置成DMA方式工作
USART_DMACmd(USART1,USART_DMAReq_Tx,ENABLE);
//开始一次DMA传输！
DMA_Cmd(DMA1_Channel4,ENABLE);
while(USART_GetFlagStatus(USART1,USART_FLAG_RXNE) == RESET)
{}
RxBuffer[index++] = USART_ReceiveData(USART1);
while(DMA_GetFlagStatus(DMA1_FLAG_TC4) == RESET)
{}
USART_SendData(USART1,RxBuffer[index]);
while(1)
{}
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{ ErrorStatus HSEStartUpStatus;
/* Enable HSE */
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{}
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC |RCC_APB2Periph_GPIOE| RCC_APB2Periph_AFIO|RCC_APB2Periph_USART1 , ENABLE); //打开外设D的时钟
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);/* Enable ADC1clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //开DMA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
}
void GPIO_Configuration(void)
{ GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; //设定LED8灯控制脚PD7
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //I/O口的方向
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures Vector Table base location.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param error line source number
* Output : None
* Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 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
void USART1_Configuration(void)
{ USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;//设置 USART1的波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//设置数据位数
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;//发送 接受使能
USART_Init(USART1, &USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
void DMA_Configuration(void)
{ DMA_InitTypeDef DMA_InitStructure;
DMA_DeInit(DMA1_Channel4);
DMA_InitStructure.DMA_PeripheralBaseAddr =USART1_DR_Base;//外设基地址（数组的首地址，即内存中的地址）
DMA_InitStructure.DMA_MemoryBaseAddr =(u32)TxBuffer;//DMA内存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;//外设作为数据传输的来源
DMA_InitStructure.DMA_BufferSize =Sendbuff_size;//定义指定DMA通道的DMA缓存的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址寄存器递增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//内存地址寄存器递增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//外设数据宽度为32位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;//内存数据宽度为32位
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;//工作在正常缓存模式
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;//DMA通道6拥有高优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//DMA通道6设置为内存到内存传输
DMA_Init(DMA1_Channel4, &DMA_InitStructure);
}
串口助手不能收到数据，请教各位看看是什么问题？ |
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