📄 drv_uart0.c
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#include "config_GD61.h"
#include "include_GD61.h"
volatile uint8 r_buf0[RX_BUFFER_LEN]; // UART0 receiving buffer
volatile uint8 t_buf0[TX_BUFFER_LEN]; // UART0 sending buffer
volatile uint8 r_ActiveFlag0=0;
volatile uint16 r_inp0=0,r_outp0=0,r_count0=0;
volatile uint16 t_inp0=0,t_outp0=0,t_count0=0;
extern volatile uint16 mSecondTick; // for delay function
/////////////////////////////////////////////////////////////////////////
uint8 Uart0Initialize (uint32 baud, UARTMODE set);
void SetDefaultUart0(void);
void __irq IRQ_Uart0Serving (void);
void Uart0SendingOver(void);
void Uart0SendingChar(char *send_pt,uint8 send_cnt);
void Uart0SendString(char *send_pt);
char _putchar(char ch);
char _getchar(void);
void Uart0SendAddCrc(uint8 send_cnt);
void Uart0SendEnter(void);
uint16 Uart0CheckCRC16(uint8 *puchMsg, uint8 usDataLen);
/*
*************************************************************************
** 函数名称 ：Uart0Initialize()
** 函数功能 ：初始化串口： 设置工作模式和波特率。
** 入口参数 ：baud 波特率
** : set 模式设置(UARTMODE数据结构)
** 出口参数 ：返回1表示成功，0表示参数出错。
status : ok
*************************************************************************
*/
uint8 Uart0Initialize (uint32 baud, UARTMODE set)
{
uint32 bak;
PINSEL0 = (PINSEL0&0xfffffff0)|0x00000005;
// 参数过滤
if ((0 == baud) || (baud > 115200)) return (0);
if ((set.datab < 5) || (set.datab > 8)) return (0);
if ((0 == set.stopb) || (set.stopb > 2)) return (0);
if (set.parity > 4) return (0);
// 设置串口波特率
U0LCR = 0x80; // DLAB=1
bak = (LPC_FPCLK >> 4) / baud;
U0DLM = bak >> 8;
U0DLL = bak & 0xff;
// 设置串口模式
bak = set.datab - 5;
if (2 == set.stopb) bak |= 0x04;
if (0 != set.parity)
{
set.parity = set.parity - 1;
bak |= 0x08;
}
bak |= set.parity << 4;
U0LCR = bak;
U0FCR = 0x81; // 使能FIFO，并设置触发点为8字节
U0IER = 0x03; // 允许UART中断, receive and sending int
/* 使能UART0中断 */
// VICIntSelect = 0x00000000; // 设置所有的通道为IRQ中断
VICVectCntl0 = 0x20|INT_UART0; // UART0分配到IRQ slot0，即最高优先级
VICVectAddr0 = (uint32)IRQ_Uart0Serving; // 设置UART0向量地址
VICIntEnable = 1<<INT_UART0; // 使能UART0中断
VICVectAddr = 0x00; // 中断处理结束
bak=U0RBR; //读取FIFO的数据，并清除中断
return (0);
}
/*****************************************************************************/
void SetDefaultUart0(void)
{
UARTMODE uart0Set;
uart0Set.datab = 8;
uart0Set.stopb = 1;
uart0Set.parity = 0;
Uart0Initialize(DEFAULT_BAND_RATE, uart0Set);
}
/*
********************************************************************************
** 函数名称 ：IRQ_Uart0Serving()
** 函数功能 ：串口0接收中断服务程序
** 入口参数 ：无
** 出口参数 ：无
** status ok
********************************************************************************
*/
void __irq IRQ_Uart0Serving(void)
{
uint8 buf;
/////
buf=U0IIR; //read interrupt identification register
while((buf&0x01)==0x0){ //bit0=0 indicates that an interrupt occur
buf&=0x0f; //get u0iir[3:0]
switch(buf){
////line error
case 0x06: //RLS interrupt, line error occur
buf=U0LSR;
// if(buf&0x02) Uart0SendString("(11) Over Run Error");
// if(buf&0x04) Uart0SendString("(12) Parity Error");
// if(buf&0x08) Uart0SendString("(13) Frame Error");
// if(buf&0x10) Uart0SendString("(14) Break Error");
// if(buf&0x80) Uart0SendString("(15) Rx FIFO Error");
break;
////receiving data
case 0x04: //RDA interrupt
case 0x0c: //CTI interrupt
buf=U0LSR; //
// if(buf&0x02) Uart0SendString("(16) Over Run Error");
// if(buf&0x04) Uart0SendString("(17) Parity Error");
// if(buf&0x08) Uart0SendString("(18) Frame Error");
// if(buf&0x10) Uart0SendString("(19) Break Error");
// if(buf&0x80) Uart0SendString("(1A) Rx FIFO Error");
while((buf&0x01)!=0x0){ //uxlsr_bit0 indicates data in uxrbr available
if(r_count0==0) r_outp0=r_inp0;
r_buf0[r_inp0]=U0RBR; //读取FIFO的数据，并清除中断
r_inp0++; if(r_inp0>=RX_BUFFER_LEN) r_inp0=0;
r_count0++;
r_ActiveFlag0 = _DATA_AVAILABLE;
buf=U0LSR; //more ?
// if(buf&0x02) Uart0SendString("(1B) Over Run Error");
// if(buf&0x04) Uart0SendString("(1C) Parity Error");
// if(buf&0x08) Uart0SendString("(1D) Frame Error");
// if(buf&0x10) Uart0SendString("(1E) Break Error");
// if(buf&0x80) Uart0SendString("(1F) Rx FIFO Error");
}
break;
////sending data
case 0x02: //THRE interrupt
buf=U0LSR;
while(((buf&0x20)==0x20)&&(t_count0!=0)){ //check the THRE empty?
IO1CLR = LED3; // LED1点亮
U0THR = t_buf0[t_outp0]; // 发送数据 here
t_outp0++; if(t_outp0>=TX_BUFFER_LEN) t_outp0=0;
t_count0--;
buf=U0LSR;
}
if(t_count0==0){
t_outp0=t_inp0; //all has been transmited
IO1SET = LED3; // LED1熄灭
}
break;
////default condition
default:
// Uart0SendString("(10) Unknown Uart0 Action");
break;
}
buf=U0IIR; //check the other case
}
VICVectAddr = 0x00; // 中断处理结束
}
////////////////////////////////////////////////////////////////////////////////
//sending anything to host without ending flag(such as CRC or ENTER)
//state :ok
////////////////////////////////////////////////////////////////////////////////
void Uart0SendingOver(void)
{
// while(t_count0!=0); //wait until t_buff empty
while((t_count0!=0)||((U0LSR&0x20)==0)); // 等待数据发送完毕
}
////////////////////////////////////////////////////////////////////////////////
//sending anything to host without ending flag(such as CRC or ENTER)
//state :ok
////////////////////////////////////////////////////////////////////////////////
void Uart0SendingChar(char *send_pt,uint8 send_cnt)
{
// while((U0LSR&0x20)==0); // 等待数据发送完毕
while((t_count0!=0)||((U0LSR&0x20)==0)); //wait until t_buff empty
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++;
send_cnt--;
}while(send_cnt>0); // copy the string to t_buffer
IRQEnable(); // 使能IRQ中断
U0THR = t_buf0[t_outp0]; //initiate sending
t_outp0++; if(t_outp0>=TX_BUFFER_LEN) t_outp0=0;
t_count0--;
}
//////////////////////////////////////////////////////////////////////////////
//sending string ending with ENTER to computer or host
//state :ok
//////////////////////////////////////////////////////////////////////////////
void Uart0SendString(char *send_pt)
{
// while((U0LSR&0x20)==0); // 等待数据发送完毕
while((t_count0!=0)||((U0LSR&0x20)==0)); //wait until t_buff empty
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
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)
{
unsigned short crc_data;
//for ModBus
// if( Response_ADDR!=RF_BROAD_CAST_ADDR){ //if broadcast address, don't response
// while((U0LSR&0x20)==0); // 等待数据发送完毕
while((t_count0!=0)||((U0LSR&0x20)==0)); //wait until t_buff empty
IRQDisable();
crc_data=Uart0CheckCRC16((uint8*)t_buf0,send_cnt); //attached CRC code
t_buf0[send_cnt] =(unsigned char)(crc_data>>8);
t_buf0[send_cnt+1] =(unsigned char) crc_data;
t_count0=send_cnt+2;
t_outp0=0;
IRQEnable(); // 使能IRQ中断
U0THR = t_buf0[0]; //initiate sending
t_outp0++;
t_count0--;
//for ModBus
// }
// else{
// t_count0=0;
// t_outp0=t_inp0=0; //all has been transmited
// }
}
////////////////////////////////////////////////////////////////////////////
//send ENTER to host
//status: ok
///////////////////////////////////////////////////////////////////////////
void Uart0SendEnter(void)
{
// while((U0LSR&0x20)==0); // 等待数据发送完毕
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
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((U0LSR&0x20)==0); // 等待数据发送完毕
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
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;
mSecondTick=5000;
while(r_count_old==r_count0){ /* Poll the serial port until a character is available*/
WatchDogClear();
if(mSecondTick==0) break;
}
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 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 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 Uart0CheckCRC16(uint8 *puchMsg, uint8 usDataLen)
{
unsigned char uchCRCHi = 0xFF ; /* 高CRC字节初始化 */
unsigned char uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */
unsigned char 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 (unsigned short)(uchCRCHi << 8 | uchCRCLo) ;
}
//////////////////////// end of file ///////////////////////////////
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