usart.c

通过手动烧写flash,实现了stm32的自动更新功能,用户可以再本例程的基础上修改实现通过串口或者网络实现程序的自动更新

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_conf.h"

#include "stm32f10x_lib.h"
#include "ucos_ii.h"

//OS_EVENT*   hUartSend;

INT8U      uart_tx_buffer[128];
INT8U      m_tx_header,m_tx_tail;
void USART_GPIO_Configuration(void);
//void USART_DMA_SendData(INT8U* buffer,INT8U size);
void USART_NVIC_Configuration(void);
/*******************************************************************************
* Function Name  : USART_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void USART_Configuration(void)
{
  USART_InitTypeDef USART_InitStructure;
  
	//初始化
  //stm_init();
  m_tx_header = m_tx_tail = 0;
  USART_GPIO_Configuration();
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
//  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA, ENABLE);

/* USARTx configuration ------------------------------------------------------*/
  /* USARTx 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 second edge 
        - 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;

 // hUartSend = OSSemCreate(1);

  /* Configure the USARTx */ 
  USART_Init(USART1, &USART_InitStructure);

  USART_NVIC_Configuration();
  
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  USART_ITConfig(USART1, USART_IT_TC, ENABLE);
  /* Enable the USARTx */
  USART_Cmd(USART1, ENABLE);
  /* Enable USART1 DMA Rx and TX request */
 // USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
//
  
}
/*
void USART_DMA_SendData(INT8U* buffer,INT8U size)
{
  INT8U perr;
  DMA_InitTypeDef DMA_InitStructure;

									  
  //等待空闲
  OSSemPend(hUartSend,0,&perr);
  // DMA Channel4 (triggered by USART1 Tx event) Config 
  DMA_DeInit(DMA_Channel4);
  DMA_InitStructure.DMA_PeripheralBaseAddr = 0x40013804;//USART1->DR;
  DMA_InitStructure.DMA_MemoryBaseAddr = (INT32U)buffer;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
  DMA_InitStructure.DMA_BufferSize = size;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA_Channel4, &DMA_InitStructure);  
  DMA_ITConfig(DMA_Channel4,DMA_IT_TC,ENABLE);

  // Enable DMA Channel4 
  DMA_Cmd(DMA_Channel4, ENABLE);
}
*/
/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configures the nested vectored interrupt controller.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void USART_NVIC_Configuration(void)
{
   NVIC_InitTypeDef NVIC_InitStructure;

#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 

   //Enable the USART1 Interrupt 
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Enable the USART1 DMA  Interrupt */

}
/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the different GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void USART_GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Configure USART1 Tx (PA.09) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void USART_DMA_SEND_ISR(void)
{
	OS_CPU_SR  cpu_sr;


	OS_ENTER_CRITICAL();                                        /* Tell uC/OS-II that we are starting an ISR                */
	OSIntNesting++;
	OS_EXIT_CRITICAL();

	if(DMA_GetITStatus(DMA_IT_TC4) == SET)
	{
//		OSSemPost(hUartSend);
		DMA_ClearITPendingBit(DMA_IT_TC4);
	}

	OSIntExit();                                                /* Tell uC/OS-II that we are leaving the ISR                */


}

void USART_RECV_ISR(void)
{
	INT16U inChar;
	OS_CPU_SR  cpu_sr;


	OS_ENTER_CRITICAL();                                        /* Tell uC/OS-II that we are starting an ISR                */
	OSIntNesting++;
	OS_EXIT_CRITICAL();
	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
	{
  		  /* Clear the USART2 Receive interrupt */
  		  USART_ClearITPendingBit(USART1, USART_IT_RXNE);
		inChar = USART_ReceiveData(USART1);
	//	ProcInput((INT8U)inChar);
	}
	if(USART_GetITStatus(USART1,USART_IT_TC) != RESET)
	{
		if(m_tx_header != m_tx_tail)
		{
			USART_SendData(USART1,(INT16U)uart_tx_buffer[m_tx_header++]);
			m_tx_header &= 0x7f;
		}
		USART_ClearITPendingBit(USART1,USART_IT_TC);
	}
	OSIntExit();   

}

void USART_SendBuffer(INT8U* data,INT8U length)
{
	BOOLEAN  bNeedStart = 0;
	if(length == 0)
	{
		return;
	}
	if(m_tx_header == m_tx_tail)
	{
		bNeedStart = 1;
	}
	for(; length > 0 ; length--)
	{
		if(!(m_tx_tail == 127 &&  m_tx_header == 0)
			&& m_tx_header != (m_tx_tail+1))
		{
			uart_tx_buffer[m_tx_tail++] = *data++;
			m_tx_tail &= 0x7f;
		}
		else
		{
			break;
		}
	}
	if(bNeedStart != 0)
	{
		USART_SendData(USART1,(INT16U)uart_tx_buffer[m_tx_header++]);
		m_tx_header &= 0x7f;
	}
}