#include "stm32f10x.h"
#define se 3//傳輸的字節數
u32 SendBuff[3];
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
//毫秒級的延時
void delay_ms(u16 time)
{
u16 i=0;
while(time--)
{
i=12000; //自己定義
while(i--) ;
}
}
/***********************************************************************
************************************************************************/
void DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //開啟DMA時鐘
//配置DMA中斷
/*設置DMA源：內存地址&串口數據寄存器地址*/
DMA_InitStructure.DMA_PeripheralBaseAddr = 0x40013804;
/*內存地址(要傳輸的變量的指針)*/
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SendBuff;
/*方向：從內存到外設*/
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
/*傳輸大小DMA_BufferSize=SENDBUFF_SIZE*/
DMA_InitStructure.DMA_BufferSize = se;
/*外設地址不增*/
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
/*內存地址自增*/
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
/*外設數據單位*/
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
/*內存數據單位 8bit*/
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
/*DMA模式：一次傳輸，循環*/
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal ;
/*優先級：中*/
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
/*禁止內存到內存的傳輸 */
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
/*配置DMA1的4通道*/
DMA_Init(DMA1_Channel4, &DMA_InitStructure);
DMA_Cmd (DMA1_Channel4,ENABLE); //使能DMA
DMA_ITConfig(DMA1_Channel4,DMA_IT_TC,ENABLE); //配置DMA發送完成后產生中斷
}
//系統時鐘配置
void RCC_Configuration(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);//使能串口1的GPIO時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
}
/*****************************************************************************
*****************************************************************************/
//串口GPIO口配置
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* LED0*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
// GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復用推挽輸出
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //懸浮輸入
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600; //設定波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //傳輸數據位數
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1
USART_InitStructure.USART_Parity = USART_Parity_No; //不用校驗位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//不用流量控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //使用接收和發送功能
USART_Init(USART1, &USART_InitStructure); //初始化串口1
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能串口1 讀中斷
USART_Cmd(USART1,ENABLE); //串口1使能
USART_ClearFlag(USART1,USART_IT_TC );//發送完成中斷
}
/*****************************************************************************
*****************************************************************************/
//中斷配置
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //先占優先權2，從優先級2位
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //開串口中斷1
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; //指定搶占優先級別1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //指定相應優先級別0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/*****************************************************************************
*****************************************************************************/
void USART1_IRQHandler( u32 temp_trx) //串口接收中斷，并將接收到得數據發送出
{
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//判斷 是否 接收中斷
{
temp_trx = USART_ReceiveData(USART1);
USART_SendData(USART1,USART_ReceiveData(USART1));
}
}
int main(void)
{
RCC_Configuration();//系統時鐘配置
DMA_Config();
NVIC_Configuration();//中斷配置
GPIO_Configuration();//GPIO口配置
while(1) //LED燈循環亮滅，串口循環發送ASCII“9”
{
delay_ms(500);
USART_SendData(USART1,9);
delay_ms(50);
USART_SendData(USART1,0xdf);
delay_ms(50);
USART_SendData(USART1,0xec);
delay_ms(50);
GPIO_WriteBit(GPIOC,GPIO_Pin_13,(BitAction)(1-GPIO_ReadOutputDataBit(GPIOC,GPIO_Pin_13)));
}
}
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