setusart.c

通过can总线接收9路AD采样并通过串口上传值PC机

/******************************************************************************/
/* SERIAL.C: Low Level Serial Routines                                        */
/******************************************************************************/
/* This file is part of the uVision/ARM development tools.                    */
/* Copyright (c) 2005-2007 Keil Software. All rights reserved.                */
/* This software may only be used under the terms of a valid, current,        */
/* end user licence from KEIL for a compatible version of KEIL software       */
/* development tools. Nothing else gives you the right to use this software.  */
/******************************************************************************/

#include <stm32f10x_lib.h>              /* STM32F10x Library Definitions      */

/*宏定义*/
#define Usart_DR_Address    ((u32)0x40013804) //参考编程手册第二章及相关寄存器偏移地址得出

/*参数申明*/
extern u8 CAN_ReceiveData[18];

/*函数原型申明*/
int GetChar (void);
int SendChar (int ch);
void SetupUART(void);

/*函数定义*/
void SetupUART(void)  
{
//  DMA_InitTypeDef   DMA_InitStructure;
//  /* DMA Channel1 Configuration ----------------------------------------------*/
//  DMA_DeInit(DMA_Channel1);	//将通道1的相关寄存器复位为默认值
//  DMA_InitStructure.DMA_PeripheralBaseAddr = Usart_DR_Address;//外设地址
//  DMA_InitStructure.DMA_MemoryBaseAddr     = (u32)&CAN_ReceiveData;//内存地址
//  DMA_InitStructure.DMA_DIR                = DMA_DIR_PeripheralDST;//dma传输方向:外设作为目标
//  DMA_InitStructure.DMA_BufferSize         = 18;//设置DMA在传输时缓冲区的长度 word
//  DMA_InitStructure.DMA_PeripheralInc      = DMA_PeripheralInc_Disable;//设置DMA的外设递增模式，一个外设
// 
//  DMA_InitStructure.DMA_MemoryInc          = DMA_MemoryInc_Enable;//设置DMA的内存递增模式
//  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//外设数据字长 8bits
//  DMA_InitStructure.DMA_MemoryDataSize     = DMA_MemoryDataSize_Byte;//内存数据字长	 8bits
//  DMA_InitStructure.DMA_Mode               = DMA_Mode_Circular;//设置DMA的传输模式：连续不断的循环模式
//  DMA_InitStructure.DMA_Priority           = DMA_Priority_High;//设置DMA的优先级别
//  DMA_InitStructure.DMA_M2M                = DMA_M2M_Disable;//设置DMA的2个memory中的变量互相访问
//  DMA_Init(DMA_Channel1, &DMA_InitStructure);//设置新的通道寄存器值
//  
//  DMA_Cmd(DMA_Channel1, ENABLE);        /* Enable DMA Channel1                */
  
  USART_InitTypeDef USART_InitStructure;
  /* USART1 configured as follow:
        - BaudRate = 115200 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
        - USART Clock disabled
        - USART CPOL: Clock is active low
        - USART CPHA: Data is captured on the middle 
        - USART LastBit: The clock pulse of the last data bit is not output to 
                         the SCLK pin
  */
  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_InitStructure.USART_Clock               = USART_Clock_Disable;
  USART_InitStructure.USART_CPOL                = USART_CPOL_Low;
  USART_InitStructure.USART_CPHA                = USART_CPHA_2Edge;
  USART_InitStructure.USART_LastBit             = USART_LastBit_Disable;
  USART_Init(USART1, &USART_InitStructure);
    
//  USART_DMACmd(USART1,USART_DMAReq_Rx,ENABLE);//关键
  USART_Cmd(USART1, ENABLE); 
//  USART_SetAddress(USART1, 0x01);
//
//
//  /* Select the USART1 WakeUp Method */
//  USART_WakeUpConfig(USART1, USART_WakeUp_AddressMark);
//  USART_ReceiverWakeUpCmd(USART1, ENABLE);
}

/* Implementation of putchar (also used by printf function to output data)    */
int SendChar (int ch)  
{                /* Write character to Serial Port     */

  USART_SendData(USART1, (unsigned char) ch);
  while (!(USART1->SR & USART_FLAG_TXE)){}; //等待传输结束
  return (ch);
}


int GetChar (void)  
{                    /* Read character from Serial Port    */

  while (!(USART1->SR & USART_FLAG_RXNE)){}; //等待接受完成
  return (USART_ReceiveData(USART1));
}