使用STM32F103和深圳显控的SA-7A的触摸屏怎么没有办法通信

只看该作者 · 2013-3-22 22:31

各位大神们：我现在想使用STM32F103的RS232串口触摸屏的RS232串口进行通信，通信协议是modbus, 数据格式是9600bps, 8位数据，1位停止位，现在STM32和触摸屏不能通信，请大神们帮我看看是我的程序哪里出问题了，该怎么办????
我写的定时器程序：
void TIM2_Configuration(void)    //定時2ms
{

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);    //配置RCC,使能TIM2
  TIM_TimeBaseStructure.TIM_Prescaler = 7199;    //時鐘預分頻數
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;    //向上計數
  TIM_TimeBaseStructure.TIM_Period = 14; //自動重裝載寄存器周期的值
  TIM_TimeBaseStructure.TIM_ClockDivision = 0; //時間分割值
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //初始化定時器2
  TIM_ClearFlag(TIM2, TIM_FLAG_Update); //清除標志
}

/*******************************************/
/*******************************************/
/*******************************************/
void Timer2_enable(void)
{
TIM_ClearFlag(TIM2, TIM_FLAG_Update);    //清除標志
TIM_SetCounter(TIM2, 0x00);    //設置寄存器值為0
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);    //使能中斷
TIM_Cmd(TIM2, ENABLE);    //開啟定時器
}

/*******************************************/
/*******************************************/
/*******************************************/
void Timer2_disable(void)
{
// TIM_ITConfig(TIM2, TIM_IT_Update |TIM_IT_Trigger, DISABLE);
TIM_ITConfig(TIM2, TIM_IT_Update, DISABLE);
TIM_Cmd(TIM2, DISABLE);
}

/*******************************************/
/*******************************************/
/*******************************************/
void TIM2_ITHandle(void)
{
if(TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)    //檢測是否發生溢出更新事件
{
  TIM_ClearITPendingBit(TIM2, TIM_IT_Update);    //清除更新標志位
//  checkComm0Modbus();
  if(receTimeOut<2)
  {
receTimeOut++;
  }
  else
  {
Timer2_disable();
receCount = 0;
bitflag = 1;
  }
}
}

我写的串口中断程序：
void USART_Configuration(u32 baudrate)
{
  USART_InitTypeDef USART_InitStructure;
  USART_ClockInitTypeDef USART_ClockInitStructure;
  GPIO_InitTypeDef  GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

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);

USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;    //時鐘低電平活動
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;    //時鐘低脈沖
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;    //時鐘第二個邊沿進行數據撲獲
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;    //最后一位數據的時鐘脈沖不縱SCLK輸出
USART_ClockInit(USART1, &USART_ClockInitStructure);

USART_InitStructure.USART_BaudRate = baudrate;
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_Init(USART1, &USART_InitStructure);

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //接收中斷
USART_ITConfig(USART1, USART_IT_TC, ENABLE); //傳送完成中斷
USART_Cmd(USART1, ENABLE);
}

/*******************************************/
/*******************************************/
/*******************************************/
void USART_ITHandle(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE)== SET) //接收中斷
{
  USART_ClearITPendingBit(USART1, USART_IT_RXNE); //清除接收中斷位
  if(receTimeOut>1)
  {
receCount = 0;
Timer2_enable();
receTimeOut = 0;
  }
  receBuf[receCount] = USART_ReceiveData(USART1);
  receCount++;
  Timer2_enable();
  receCount &= 0x0f;
}
else if(USART_GetITStatus(USART1, USART_IT_TC) == SET)    //檢驗發送完成中斷
{
  USART_ClearFlag(USART1, USART_FLAG_TC);    //清除發送完成標志位
  if(sendPosi < sendCount)
  {
sendPosi++;
USART_SendData(USART1, sendBuf[sendPosi]);
  }
  else
  {
receCount = 0;
  }
}
}