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TQ2440裸奔程序:串口UART的PC机按键测试程序

  TQ2440 是由广州天嵌计算机科技有限公司精心打造的一款开发板。以稳定的性能,过硬的质量,丰富的扩展接口,优质的售后服务和技术支持,赢得众多企业的青睐和支持。

  //=========================================

  // NAME: main.c

  // DESC: TQ2440串口UART测试程序

  //=========================================

  /* 头文件包含 */

  #include "def.h"

  #include "option.h"

  #include "2440addr.h"

  #include

  #include

  #include

  #include

  #include

  //======================================================

  static volatile int uart_port = 0;

  void uart_init(int pclk,int buad,int ch)

  {

  //UART初始化:端口使能、功能设定、波特率、设置数据格式

  rGPHCON = (rGPHCON & ~(0xfff<<4)) | (0xaaa<<4);//端口RX[0:2]、TX[0:2]功能

  rGPHUP = rGPHUP | (0x7<<1); //端口GPH[1:3]禁止上拉

  rUFCON0 = 0x0; //禁止FIFO

  rUFCON1 = 0x0; //禁止FIFO

  rUFCON2 = 0x0; //禁止FIFO

  rUMCON0 = 0x0; //禁止AFC

  rUMCON1 = 0x0; //禁止AFC

  //Normal:No parity:One stop:8-bits 中断响应 UART clock: PCLK

  rULCON0 = (rULCON0 & ~0xff) | ((0x0<<6)|(0x0<<3)|(0x0<<2)|(0x3));

  rUCON0 = (rUCON0 & ~0x3ff) | ((0x1<<9)|(0x1<<6)|(0x1<<2)|(0x1));

  rUBRDIV0 = ((int)(pclk/16./buad+0.5)-1);

  rULCON1 = (rULCON1 & ~0xff) | ((0x0<<6)|(0x0<<3)|(0x0<<2)|(0x3));

  rUCON1 = (rUCON1 & ~0x3ff) | ((0x1<<9)|(0x1<<6)|(0x1<<2)|(0x1));

  rUBRDIV1 = ((int)(pclk/16./buad+0.5)-1);

  rULCON2 = (rULCON2 & ~0xff) | ((0x0<<6)|(0x0<<3)|(0x0<<2)|(0x3));

  rUCON2 = (rUCON2 & ~0x3ff) | ((0x1<<9)|(0x1<<6)|(0x1<<2)|(0x1));

  rUBRDIV2 = ((int)(pclk/16./buad+0.5)-1);

  uart_port = ch; //设置串口端口号

  }

  //******************************************************

  // 串口发送函数

  //******************************************************

  //======================================================

  void uart_send_byte(int data)

  {

  if(0 == uart_port)

  {

  if(data == 'n')

  {

  while(!(rUTRSTAT0 & 0x2));

  rUTXH0 = 'n';

  }

  while(!(rUTRSTAT0 & 0x2));

  rUTXH0 = data;

  }

  else if(1 == uart_port)

  {

  if(data == 'n')

  {

  while(!(rUTRSTAT1 & 0x2));

  rUTXH1 = 'n';

  }

  while(!(rUTRSTAT1 & 0x2));

  rUTXH1 = data;

  }

  else if(2 == uart_port)

  {

  if(data == 'n')

  {

  while(!(rUTRSTAT2 & 0x2));

  rUTXH2 = 'n';

  }

  while(!(rUTRSTAT2 & 0x2));

  rUTXH2 = data;

  }

  }

  //======================================================

  void uart_send_string(char *string)

  {

  while(*string)

  {

  uart_send_byte(*string++);

  }

  }

  //======================================================

  void uart_printf(char *fmt,...)

  {

  va_list ap;

  char string[256];

  va_start(ap,fmt);

  vsprintf(string,fmt,ap);

  uart_send_string(string);

  va_end(ap);

  }

  //******************************************************

  // 串口接收函数

  //******************************************************

  //======================================================

  void uart_tx_empty(void)

  {

  if(0 == uart_port)

  {

  while(!(rUTRSTAT0 & 0x4));//等待Tx为空

  }

  if(1 == uart_port)

  {

  while(!(rUTRSTAT1 & 0x4));//等待Tx为空

  }

  if(2 == uart_port)

  {

  while(!(rUTRSTAT2 & 0x4));//等待Tx为空

  }

  }

  //======================================================

  char uart_get_ch(void)

  {

  if(0 == uart_port)

  {

  while(!(rUTRSTAT0 & 0x1));//等待Rx被读

  return rURXH0; //读缓存寄存器

  }

  else if(1 == uart_port)

  {

  while(!(rUTRSTAT1 & 0x1));//等待Rx被读

  return rURXH1; //读缓存寄存器

  }

  else if(2 == uart_port)

  {

  while(!(rUTRSTAT2 & 0x1));//等待Rx被读

  return rURXH2; //读缓存寄存器

  }

  return 0;

  }

  //======================================================

  char uart_get_key(void)

  {

  if(0 == uart_port)

  {

  if(rUTRSTAT0 & 0x1) //Rx被读

  {

  return rURXH0; //读缓存寄存器

  }

  else

  {

  return 0;

  }

  }

  if(1 == uart_port)

  {

  if(rUTRSTAT1 & 0x1) //Rx被读

  {

  return rURXH1; //读缓存寄存器

  }

  else

  {

  return 0;

  }

  }

  if(2 == uart_port)

  {

  if(rUTRSTAT2 & 0x1) //Rx被读

  {

  return rURXH2; //读缓存寄存器

  }

  else

  {

  return 0;

  }

  }

  return 0;

  }

  //======================================================

  void uart_get_string(char *string)

  {

  char *string1 = string;

  char c = 0;

  while((c = uart_get_ch())!='r')

  {

  if(c == 'b')

  {

  if((int)string1 < (int)string)

  {

  uart_printf("bb");

  string--;

  }

  }

  else

  {

  *string++ = c;

  uart_send_byte(c);

  }

  }

  *string = '�';

  uart_send_byte('n');

  }

  //======================================================

  int uart_get_intnum(void)

  {

  char str[30];

  char *string = str;

  int base = 10;

  int minus = 0;

  int result = 0;

  int last_index;

  int i;

  uart_get_string(string);

  if(string[0] == '-')

  {

  minus = 1;

  string++;

  }

  if(string[0] == '0' && (string[1] == 'x' || string[1] == 'X'))

  {

  base = 16;

  string = string + 2;

  }

  last_index = strlen(string)-1;

  if(last_index < 0)

  {

  return -1;

  }

  if(string[last_index] == 'h' || string[last_index] == 'H')

  {

  base = 16;

  string[last_index] = 0;

  last_index--;

  }

  if(base == 10)

  {

  //atoi将字符串转换为整型值

  result = atoi(string);

  result = minus ? (-1*result) : result;

  }

  else

  {

  for(i=0;i<=last_index;i++)

  {

  //判断字符是否为英文字母,当为英文字母a-z或A-Z时,返回非零值,否则返回零。

  if(isalpha(string[i]))

  {

  //isupper 判断字符是否为大写英文字母,当c为大写英文字母,返回非零值,否则返回零。

  if(isupper(string[i]))

  {

  result = (result<<4) + string[i]-'A'+10;

  }

  else

  {

  result = (result<<4) + string[i]-'a'+10;

  }

  }

  else

  {

  result = (result<<4) + string[i]-'0'+10;

  }

  }

  result = minus ? (-1*result) : result;

  }

  return result;

  }

  //======================================================

  int uart_get_intnum_gj(void)

  {

  char string[16];

  char *p_string = string;

  char c;

  int i = 0;

  int data = 0;

  while((c = uart_get_ch()) != 'r')

  {

  if(c == 'b')

  {

  p_string--;

  }

  else

  {

  *p_string++ = c;

  }

  //uart_send_byte(c);

  }

  *p_string = '�';

  i=0;

  while(string[i] != '�')

  {

  data = data*10;

  if(string[i]<'0' || string[i]>'9')

  {

  return -1;

  }

  data = data +(string[i]-'0');

  i++;

  }

  return data;

  }

  //******************************************************

  void Main(void)

  {

  uart_init(50000000,115200,0);

  while(1)

  {

  if('-' == uart_get_ch())

  {

  uart_printf("+n");

  }

  if('+' == uart_get_key())

  {

  uart_printf("-n");

  }

  }

  }

  感谢晨旭晚霞的支持!

  供货情况:

  天嵌科技提供专业嵌入式板卡和行业解决方案。如有需要,可以联系天嵌科技的销售人员。

  销售电话:020-38219416 38373101

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