📄 drv_uart0.c
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IRQDisable();
do
{
t_buf0[t_inp0]=*send_pt;
t_inp0++; if(t_inp0>=TX_BUFFER_LEN) t_inp0=0; //elarge the sending buffer
send_pt++;
t_count0++;
}while(*send_pt!=0); // copy the string to t_buffer
t_buf0[t_inp0]=0x0d;
t_inp0++; if(t_inp0>=TX_BUFFER_LEN) t_inp0=0; //elarge the sending buffer
t_count0++;
t_buf0[t_inp0]=0x0a;
t_inp0++; if(t_inp0>=TX_BUFFER_LEN) t_inp0=0;
t_count0++;
IRQEnable(); // 使能IRQ中断
IO1CLR=RS485TE0_P1o; //set it sending mode
DelayUS_(1000000/UART0_BAND_RATE);
U0THR = t_buf0[t_outp0]; //initiate sending
t_outp0++; if(t_outp0>=TX_BUFFER_LEN) t_outp0=0;
t_count0--;
}
////////////////////////////////////////////////////////////////////////////
//sending command package from t_buf0[0] to t_buf0[send_cnt+2] including CRC
//status :ok
/**************************************************************************/
void Uart0SendAddCrc(uint8 send_cnt)
{
uint16 crc_data;
////
#ifdef NO_RESP_BROAD_CAST
if(Comm_Src_Addr==BROAD_CAST_ADDR) return;
#endif
////
while((t_count0!=0)||((U0LSR&0x20)==0)); //wait until t_buff empty
IRQDisable();
crc_data=MB_CRC16Check((uint8*)t_buf0,send_cnt); //attached CRC code
t_buf0[send_cnt] = (uint8)(crc_data>>8);
t_buf0[send_cnt+1] = (uint8) crc_data;
t_count0=send_cnt+2;
t_outp0=0;
IRQEnable(); // 使能IRQ中断
IO1CLR=RS485TE0_P1o; // set it sending mode
DelayUS_(1000000/UART0_BAND_RATE);
U0THR = t_buf0[0]; //initiate sending
t_outp0++;
t_count0--;
}
/**************************************************************************/
void Uart0SendAdd_Crc(uint8 *send_pt,uint8 send_cnt)
{
uint16 crc_data;
uint8 i;
////
#ifdef NO_RESP_BROAD_CAST
if(Comm_Src_Addr==BROAD_CAST_ADDR) return;
#endif
////
while((t_count0!=0)||((U0LSR&0x20)==0)); //wait until t_buff empty
for(i=0;i<send_cnt;i++){
t_buf0[i] = *send_pt++;
}
IRQDisable();
crc_data=MB_CRC16Check((uint8*)t_buf0,send_cnt); //attached CRC code
t_buf0[send_cnt] = (uint8)(crc_data>>8);
t_buf0[send_cnt+1] = (uint8) crc_data;
t_count0=send_cnt+2;
t_outp0=0;
IRQEnable(); // 使能IRQ中断
IO1CLR=RS485TE0_P1o; // set it sending mode
DelayUS_(1000000/UART0_BAND_RATE);
U0THR = t_buf0[0]; //initiate sending
t_outp0++;
t_count0--;
}
////////////////////////////////////////////////////////////////////////////
//send ENTER to host
//status: ok
///////////////////////////////////////////////////////////////////////////
void Uart0SendEnter(void)
{
while((t_count0!=0)||((U0LSR&0x20)==0)); //wait until t_buff empty
IRQDisable();
t_buf0[t_inp0]=0x0d;
t_inp0++; if(t_inp0>=TX_BUFFER_LEN) t_inp0=0;
t_count0++;
t_buf0[t_inp0]=0x0a;
t_inp0++; if(t_inp0>=TX_BUFFER_LEN) t_inp0=0;
t_count0++;
IRQEnable(); // 使能IRQ中断
IO1CLR=RS485TE0_P1o; // set it sending mode
DelayUS_(1000000/UART0_BAND_RATE);
U0THR = t_buf0[t_outp0]; //initiate sending
t_outp0++; if(t_outp0>=TX_BUFFER_LEN) t_outp0=0;
t_count0--;
}
//////////////////////////////////////////////////////////////////////
// Simple implementation of the ANSI putchar() routine, writes to UART
char _putchar(char ch)
{
while((t_count0!=0)||((U0LSR&0x20)==0)); // wait until t_buff empty
IRQDisable();
t_buf0[t_inp0]=ch;
t_inp0++; if(t_inp0>=TX_BUFFER_LEN) t_inp0=0; //elarge the sending buffer
t_count0++;
IRQEnable(); // 使能IRQ中断
IO1CLR=RS485TE0_P1o; //set it sending mode
DelayUS_(1000000/UART0_BAND_RATE);
U0THR = t_buf0[t_outp0]; //initiate sending
t_outp0++; if(t_outp0>=TX_BUFFER_LEN) t_outp0=0;
t_count0--;
return ch;
}
///////////////////////////////////////////////////////////////////////
// Simple implementation of the ANSI getchar() routine, reads from UART
char _getchar(void)
{
char charbuff;
uint16 r_count_old;
uint16 r_inp_;
r_count_old=r_count0;
while(r_count_old==r_count0){ /* Poll the serial port until a character is available*/
WatchDogClear();
}
if(r_inp0==0){
r_inp_= RX_BUFFER_LEN-1;
}else{
r_inp_=r_inp0-1;
}
charbuff=r_buf0[r_inp_];
return charbuff; /* Return received character */
}
////////////////////////////////////////////////////////////
// calculate CRC_16 check coed
/* CRC 高位字节值表 */
unsigned char const auchCRCHi[256] = {
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 };
/* CRC低位字节值表*/
unsigned char const auchCRCLo[256] = {
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
0x61, 0xA1, 0x63, 0xa3, 0xa2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
0x43, 0x83, 0x41, 0x81, 0x80, 0x40 };
//////////////////////////////////////////////////////////////////////
/* 要进行CRC校验的消息 ,消息中字节数 */
uint16 MB_CRC16Check(uint8 *puchMsg, uint8 usDataLen)
{
uint8 uchCRCHi = 0xFF ; /* 高CRC字节初始化 */
uint8 uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */
uint8 uIndex ; /* CRC循环中的索引 */
while(usDataLen--) /* 传输消息缓冲区 */
{
uIndex = uchCRCHi ^ *puchMsg++ ; /* 计算CRC */
uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
uchCRCLo = auchCRCLo[uIndex] ;
}
return (uint16)((uchCRCHi<<8)|uchCRCLo) ;
}
//////////////////////// end of file ///////////////////////////////
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