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Tài trợ cho PIC Vietnam |
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| dsPIC - Bộ điều khiển tín hiệu số 16-bit Theo dự kiến của Microchip, vào khoảng năm 2011 dsPIC sẽ có doanh số lớn hơn PIC |
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Ðiều Chỉnh | Xếp Bài |
29-06-2008, 11:12 AM
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#18 |
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Đệ tử 2 túi
Tham gia ngày: Nov 2005
Bài gửi: 45
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Kính gửi anh Nam và các bạn,
Em đã làm theo hướng dẫn của anh, kết quả hiển thị trên LED đúng bằng giá trị PC truyền anh ạ. Em đã xử lý được hiện tượng mất ký tự cuối bằng cách Delay một khoảng thời gian ngay sau khi truyền ký tự cuối cùng trước khi hạ chân DE/RE. Đây là đoạn code: Code:
#include <p30f4011.h>
_FOSC(CSW_FSCM_OFF & XT_PLL4);//FRC_PLL4
_FWDT(WDT_OFF);
_FBORPOR(PBOR_OFF & MCLR_EN);
_FGS(CODE_PROT_OFF);
//----------------------------------------------------------------------------
//Cac hang so cua chuong trinh (gia tri tuc thoi dung trong chuong trinh)
#define Fcy 4000000 //Tan so thuc thi lenh (Thach anh 4MHz)
#define baud 9600 //Toc do baud cua RS232
#define _ISR_PSV __attribute__((interrupt, auto_psv))
//----------------------------------------------------------------------------
//Cac prototype cho cac chuong trinh con
void Init_PORTS(void);
void Init_ADC10(void);
void Init_TMR1(void);
void Init_UART1(void);
void Init_UART2(void);
unsigned short CRC16(unsigned char* puchMsg, unsigned char usDataLen);
//----------------------------------------------------------------------------
//Khai bao bien toan cuc
/* Table of CRC values for high-order byte */
unsigned char auchCRCHi[] = {
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
} ;
/* Table of CRC values for low-order byte */
unsigned char auchCRCLo[] = {
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
} ;
unsigned char gFwd[]={0x01,0x06,0x01,0x50,0x00,0x01,0x49,0xE7};
unsigned char gRev[]={0x01,0x06,0x01,0x50,0x00,0x02,0x09,0xE6};
unsigned char gStop[]={0x01,0x06,0x01,0x50,0x00,0x00,0x88,0x27};
unsigned char gSpe[]={0x01,0x06,0x00,0x80,0x03,0x89,0x0A};
unsigned char gRec[20]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
unsigned char gRPos=0;
unsigned char gTPos=0;
unsigned char gRCount=0;
unsigned char gCmd=0;
int gEE_Return;
unsigned int gFlag_2;
unsigned char gReceiving=0; //Co bao dang nhan du lieu
unsigned int gRecDelay=30; //Thoi gian Delay de nhan het chuoi du lieu
unsigned int gcRecDelay=30; //Dem thoi gian Delay de nhan het chuoi du lieu
unsigned char gSending=0; //Co bao dang gui du lieu
unsigned int gSendDelay=20; //Thoi gian delay sau moi lan gui du lieu
unsigned int gcSendDelay=20; //Dem thoi gian delay sau moi lan gui du lieu
unsigned int gFlag_1;
unsigned char gRec_1; //Ky tu lenh nhan tu UART1
unsigned char gReceiving_2=0; //Co bao dang nhan du lieu
unsigned int gRecDelay_2=30; //Thoi gian Delay de nhan het chuoi du lieu
unsigned int gcRecDelay_2=30; //Dem thoi gian Delay de nhan het chuoi du lieu
unsigned char gSending_2=0; //Co bao dang gui du lieu
unsigned int gSendDelay_2=30; //Thoi gian delay sau moi lan gui du lieu
unsigned int gcSendDelay_2=30; //Dem thoi gian delay sau moi lan gui du lieu
unsigned int gDelay=200;
//============================================================================
//CHUONG TRINH CHINH
//Kiem tra co gFlag (co bao UART1 nhan du lieu)
//Truyen ky tu nhan duoc
//============================================================================
int main(void) {
int mDelay=0;
Init_PORTS(); //Khoi tao cac cong I/O
Init_TMR1(); //Khoi tao Timer 1
Init_UART1(); //Khoi tao module UART1
Init_UART2(); //Khoi tao module UART2
_LATE0=0; //Cho phep nhan Data
while (1)
{ if(gFlag_2)
{ gFlag_2=0;
//_LATB0^=1;
_LATE0=1; //Cho phep gui Data
while(gTPos!=gRPos)
{ U2TXREG = gRec[gTPos]; //
while (!U2STAbits.TRMT); //
if(++gTPos>19) gTPos=0;
gcSendDelay=gSendDelay;
gSending=1;
};
}
if(gFlag_1)
{ gFlag_1=0;
U1TXREG = gRec_1; //
while (!U1STAbits.TRMT); //
}
};
}
//============================================================================
//Function tinh CRC
//============================================================================
unsigned short CRC16(unsigned char * puchMsg, unsigned char usDataLen)
{ unsigned char uchCRCHi = 0xFF ; /* high CRC byte initialized */
unsigned char uchCRCLo = 0xFF ; /* low CRC byte initialized */
unsigned uIndex ; /* will index into CRC lookup*/
/* table*/
while (usDataLen--) /* pass through message buffer*/
{ uIndex = uchCRCHi ^ *puchMsg++ ; /* calculate the CRC*/
uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
uchCRCLo = auchCRCLo[uIndex] ;
}
return (uchCRCHi << 8 | uchCRCLo) ;
}
/*
unsigned int CRC_Calc(int* pMes)
{ unsigned int mCRC_Reg=0xFFFF;
unsigned char mHighByte;
unsigned char mLowByte;
return 1;
}
*/
//============================================================================
//Proc khoi tao cac cong I/O
//============================================================================
void Init_PORTS(void)
{ /*PortB: Output
RB0-RB7: Du lieu cho LCD
DB8: Dieu khien den nen LCD
*/
LATB=0; //Xoa thanh ghi chot port B
TRISB = 0x0000; //RB0 la ngo ra
/*PortD: Output dieu khien SPI
RD0-RD2: Lua chon Slave
RD3: Tao xung clock
*/
LATD = 0; //Xoa thanh ghi chot cong D
TRISD &= 0xFFF0;
/*PortC: Du lieu SPI
RC13: SDI
RC14: SDO
*/
LATC=0;
TRISC |=0x2000;
TRISC &=0xBFFF;
/*PordE: In/Out
RE0: Ngo ra dieu khien MAX485
RE1-RE5,RE8: Doc trang thai cac nut nhan
*/
LATE=0; //Xoa thanh ghi chot Port E
TRISE=0x00FE;
/*PortF: In/Output
RF0, RF1, RF6: Dieu khien LCD
Cac pinc con lai dung cho UARTx
*/
LATF=0;
TRISF &=0xFFBC;
}
//============================================================================
//Proc khoi tao va setup Timer1 (Ngat sau 1S)
//============================================================================
void Init_TMR1(void) {
TMR1 = 0; //Xoa so dem trong TMR1
//PR1 = 0x3D09; //Nguong tran la 1 giay (=4000000/256)
PR1 = 100; //Nguong tran la 650uS
_T1IF = 0; //Xoa co ngat cua Timer 1
T1CON = 0x8030; //Dung fcy lam clock, prescale = 1:256
_T1IE = 1; //Cho phep ngat khi Timer 1 tran
}
//============================================================================
//Proc khoi tao module UART1
//Baud rate = 9600, 8 bit Data, no Parity, 1 bit stop
//============================================================================
void Init_UART1(void) {
U1MODE = 0x8000; //Main I/O, 8-bit, no parity, 1 stop bit
//U1MODE = 0x8400; //ALT I/O, 8-bit, no parity, 1 stop bit
U1STA = 0x0400; //bit10=UTXEN
U1BRG = (((Fcy/baud)/16)-1); //38400 bps @ Fcy = 8 MHz
_U1RXIF = 0;
_U1RXIE=1;
}
//============================================================================
//Proc khoi tao module UART2
//Baud rate = 9600, 8 bit Data, no Parity, 1 bit stop
//============================================================================
void Init_UART2(void) {
U2MODE = 0x8000; //Main I/O, 8-bit, no parity, 1 stop bit
//U2MODE = 0x8400; //ALT I/O, 8-bit, no parity, 1 stop bit
U2STA = 0x0400; //bit10=UTXEN
U2BRG = (((Fcy/baud)/16)-1); //38400 bps @ Fcy = 8 MHz
_U2RXIF = 0;
_U2RXIE=1;
}
//============================================================================
//Proc Xu ly ngat Timer1
//============================================================================
void _ISR_PSV _T1Interrupt(void)
{ _LATD0^=1;
if(gReceiving)
{ if(--gcRecDelay<1)
{ gReceiving=0;
gFlag_2= 1;
}
}
if(gSending)
{ if(--gcSendDelay<1)
{ gSending=0;
_LATE0=0; //Cho phep nhan Data
}
}
_T1IF = 0; //Xoa co ngat Timer1
}
//============================================================================
//Proc Xu ly ngat khi UART1 nhan Data tu PC
//Dung mang 20 ky tu lam bo dem (+4 ky tu bo dem cua dsPIC)
//============================================================================
void _ISR_PSV _U1RXInterrupt(void)
{ gFlag_1=1; //Co bao nhan duoc ky tu tu UART2
gRec_1=U1RXREG; //Nhan du lieu tu bo dem thu
_U1RXIF = 0; //Xoa co ngat UART2
}
//============================================================================
//Proc Xu ly ngat khi UART2 nhan Data tu Inverter
//Dung mang 20 ky tu lam bo dem (+4 ky tu bo dem cua dsPIC)
//============================================================================
void _ISR_PSV _U2RXInterrupt(void)
{ gcRecDelay=gRecDelay; //Reset biet dem thoi gian Delay
gReceiving=1; //Bat co bao dang doi ky tu tiep theo
gRec[gRPos]=U2RXREG; //Nhan du lieu tu bo dem thu
if (++gRPos>19) gRPos=0; //
_LATD1^=1; //Doi trang thai LED de bao hieu co xay ra ngat UART1
_U2RXIF = 0; //Xoa co ngat UART1
}
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Biết thì nói là biết, Không biết thì nói là không biết, .. |
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