//****************************************************************************************** // PIC18F14K50 Sample Program // Project : // Program Name : // Programer : // Create date : Version 1.0 H22.08.20 // History : // Laungage : MPLAB C18 //****************************************************************************************** // (1)Description // //****************************************************************************************** #include #include #include #include #include #include #include #include // //Define configration // #pragma config CPUDIV=NOCLKDIV //CPU System Clock Selection bit(No CPU System Clock divide) #pragma config USBDIV = OFF //USB Clock Selection bit(USB Clock comes directly from the OSC1/OSC2 oscillator block; no divide) //#pragma config FOSC = HS //Oscillator Selection bits(HS oscillator) #pragma config FOSC = IRC //Oscillator Selection bits(Internal RC oscillator) #pragma config PLLEN = ON //X PLL Enable bit(Oscillator multiplied by 4) #pragma config PCLKEN = OFF //Primary Clock Enable Bit(Primary clock is under software control) #pragma config FCMEN = OFF #pragma config IESO = OFF //Internal/External Oscillator Switchover bit(Oscillator Switchover mode disabled) #pragma config PWRTEN = OFF,BOREN = OFF,BORV = 19 #pragma config WDTEN = OFF,WDTPS = 1 #pragma config MCLRE = OFF //MCLR Pin Enable bit(RE3 input pin enabled; MCLR disabled) #pragma config HFOFST = OFF,STVREN = OFF,LVP = OFF,BBSIZ = OFF,XINST = OFF #pragma config CP0 = OFF,CP1 = OFF,CPB = OFF,CPD = OFF,WRT0 = OFF,WRT1 = OFF,WRTB = OFF,WRTC = OFF,WRTD = OFF,EBTR0 = OFF,EBTR1 = OFF,EBTRB = OFF // //Define function // void Timer(void); void Wait(unsigned int); void InitUART(void); void SendUART(char); void ReciveUART(char *); void SendUART_s(char *); void InitOSC(void); void Red_IntEEP(unsigned char,unsigned char,unsigned char *); void Wrt_IntEEP(unsigned char,unsigned char,unsigned char ); void Demo001(void); //****************************************************************************************** // Program : // Title : // Input : // Output : //****************************************************************************************** void main(void) { char tmp_data_s[30]; char data_c; // ***************************** // 1.Initialized Segment // ***************************** // (1)Define OSC InitOSC(); //Internal OSC 16MHz // (2)Define I/O port TRISA = 0xFF; TRISB = 0xFF; TRISC = 0xFF; // (3)Initialize EUSAR InitUART(); // ***************************** // 2.Program main // ***************************** // (1)Send Message strcpypgm2ram(tmp_data_s," PIC18F14K50 Connected OK> "); SendUART_s(tmp_data_s); // (2)Main program while(1){ Demo001(); }; } //****************************************************************************************** // Function Name : Demo001 // Title : // Input : // Output : // Description : //****************************************************************************************** void Demo001(void) { unsigned char data_c; unsigned char lp; // *********************** // 1.Write EEP-ROM // *********************** for(lp=0;lp<5;lp++){ ReciveUART(&data_c); SendUART(data_c); Wrt_IntEEP(lp,0,data_c); } // *********************** // 2.Read EEP-ROM // *********************** SendUART('['); for(lp=0;lp<5;lp++){ Red_IntEEP(lp,0,&data_c); SendUART(data_c); } SendUART(']'); } //****************************************************************************************** // Function Name : InitOSC // Title : // Input : // Output : // Description : Internal 16MHz //****************************************************************************************** void InitOSC(void) { // ******************************************************* // 1.Define OSCCON(OSCILLATOR CONTROL REGISTER) // OSCCON(7) IDLEN: Idle Enable bit // 1 = Device enters Idle mode on SLEEP instruction // 0 = Device enters Sleep mode on SLEEP instruction // OSCCON(6-4) IRCF<2:0>: Internal Oscillator Frequency Select bits // 111 = 16 MHz // 110 = 8 MHz // 101 = 4 MHz // 100 = 2 MHz // 011 = 1 MHz(3) // 010 = 500 kHz // 001 = 250 kHz // 000 = 31 kHz(2) // OSCCON(3) OSTS: Oscillator Start-up Time-out Status bit(1) // 1 = Device is running from the clock defined by FOSC<2:0> of the CONFIG1 register // 0 = Device is running from the internal oscillator (HFINTOSC or LFINTOSC) // OSCCON(2) HFIOFS: HFINTOSC Frequency Stable bit // 1 = HFINTOSC frequency is stable // 0 = HFINTOSC frequency is not stable // OSCCON(1-0) SCS<1:0>: System Clock Select bits // 1x = Internal oscillator block // 01 = Secondary (Timer1) oscillator // 00 = Primary clock (determined by CONFIG1H[FOSC<3:0>]). // ******************************************************* OSCCON =0b11111111; //Internal 16MHz // ******************************************************* // 2.Define OSCCON2(OSCILLATOR CONTROL REGISTER 2) // OSCCON2(7-3) Unimplemented: Read as ‘0’ // OSCCON2(2) PRI_SD: Primary Oscillator Drive Circuit shutdown bit // 1 = Oscillator drive circuit on // 0 = Oscillator drive circuit off (zero power) // OSCCON2(1) HFIOFL: HFINTOSC Frequency Locked bit // 1 = HFINTOSC is in lock // 0 = HFINTOSC has not yet locked // OSCCON2(0) LFIOFS: LFINTOSC Frequency Stable bit // 1 = LFINTOSC is stable // 0 = LFINTOSC is not stable // ******************************************************* OSCCON2 =0b00000000; // ******************************************************* // 3.Define OSCTUNE(OSCILLATOR TUNING REGISTER) // OSCTUNE(7) INTSRC: Internal Oscillator Low-Frequency Source Select bit // 1 = 31.25 kHz device clock derived from 16 MHz HFINTOSC source (divide-by-512 enabled) // 0 = 31 kHz device clock derived directly from LFINTOSC internal oscillator // OSCTUNE(6) SPLLEN: Software Controlled Frequency Multiplier PLL bit // 1 = PLL enabled (for HFINTOSC 8 MHz only) // 0 = PLL disabled // OSCTUNE(5-0) TUN<5:0>: Frequency Tuning bits // 011111 = Maximum frequency // 011110 = // ・・・・ // 000001 = // 000000 = Oscillator module is running at the factory calibrated frequency. // 111111 = // ・・・・ // 100000 = Minimum frequency // ******************************************************* OSCTUNE = 0b00000000; } //****************************************************************************************** // Program : Wrt_IntEEP // Title : Write Internal Data EEP-ROM Memory // Input : // Output : //****************************************************************************************** void Wrt_IntEEP(unsigned char Add_L,unsigned char Add_H,unsigned char dat_c) { EEDATA = dat_c; EEADR = Add_L; EEADRH = Add_H; // EECON1bits.EEPGD =0 ; // Point to DATA memory EECON1bits.CFGS =0 ; // Access EEPROM EECON1bits.WREN =1 ; // Enable writes INTCONbits.GIE =0 ; // Disable Interrupts // EECON2 = 0x55; EECON2 = 0xAA; // EECON1bits.WR = 1; // Set WR bit to begin write INTCONbits.GIE = 1; // Enable Interrupts EECON1bits.WREN = 0; // Disable writes on write complete (EEIF set) // Timer(); } //****************************************************************************************** // Program : Red_IntEEP // Title : Read Internal Data EEP-ROM Memory // Input : // Output : //****************************************************************************************** void Red_IntEEP(unsigned char Add_L,unsigned char Add_H,unsigned char *dat_c) { EEADR = Add_L; EEADRH = Add_H; // EECON1bits.EEPGD = 0 ; // Point to DATA memory EECON1bits.CFGS = 0 ; // Access EEPROM EECON1bits.RD = 1 ; // EEPROM Read // *dat_c = EEDATA ; } //****************************************************************************************** // Function Name : SendUART_s // Title : // Input : // Output : // Description : Write TXREG //****************************************************************************************** void SendUART_s(char *put_string) { while(*put_string!=0x00){ SendUART(*put_string); put_string++; } } //****************************************************************************************** // Function Name : InitUART // Title : // Input : // Output : // Description : Fosc:48MHz, Baud Rate:9600BPS, 16-bit Baud Rate //****************************************************************************************** void InitUART(void) { // ******************************************************* // 0.Define ANSELH(ANALOG SELECT REGISTER 2) // ANSELH(3) ANS11: RB5 Analog Select Control bit // 0 = Digital input buffer of RB5 is enabled // ******************************************************* ANSELH = ANSELH & 0b11110111; // ******************************************************* // 1.Define TXSTA(TRANSMIT STATUS AND CONTROL) Register // TXSTA(7) CSRC: Clock Source Select bit // Asynchronous mode:Don’t care // TXSTA(6) TX9: 9-bit Transmit Enable bit // 1 = Selects 9-bit transmission // 0 = Selects 8-bit transmission // TXSTA(5) TXEN: Transmit Enable bit(1) // 1 = Transmit enabled // 0 = Transmit disabled // TXSTA(4) SYNC: EUSART Mode Select bit // 1 = Synchronous mode // 0 = Asynchronous mode // TXSTA(3) SENDB: Send Break Character bit // Asynchronous mode: // 1 = Send Sync Break on next transmission (cleared by hardware upon completion) // 0 = Sync Break transmission completed // TXSTA(2) BRGH: High Baud Rate Select bit // Asynchronous mode: // 1 = High speed // 0 = Low speed // TXSTA(1) TRMT: Transmit Shift Register Status bit // 1 = TSR empty // 0 = TSR full // TXSTA(0) TX9D: Ninth bit of Transmit Data // Can be address/data bit or a parity bit. // ******************************************************* TXSTA = 0b00100100; // ******************************************************* // 2.Define RCSTA(RECEIVE STATUS AND CONTROL) Register // RCSTA(7) SPEN: Serial Port Enable bit // 1 = Serial port enabled (configures RX/DT and TX/CK pins as serial port pins) // 0 = Serial port disabled (held in Reset) // RCSTA(6) RX9: 9-bit Receive Enable bit // 1 = Selects 9-bit reception // 0 = Selects 8-bit reception // RCSTA(5) SREN: Single Receive Enable bit // Asynchronous mode: // Don’t care // RCSTA(4) CREN: Continuous Receive Enable bit // Asynchronous mode: // 1 = Enables receiver // 0 = Disables receiver // RCSTA(3) ADDEN: Address Detect Enable bit // Asynchronous mode 9-bit (RX9 = 1): // 1 = Enables address detection, enable interrupt and load the receive buffer when RSR<8> is set // 0 = Disables address detection, all bytes are received and ninth bit can be used as parity bit // Asynchronous mode 8-bit (RX9 = 0): // Don’t care // RCSTA(2) FERR: Framing Error bit // 1 = Framing error (can be updated by reading RCREG register and receive next valid byte) // 0 = No framing error // RCSTA(1) OERR: Overrun Error bit // 1 = Overrun error (can be cleared by clearing bit CREN) // 0 = No overrun error // RCSTA(0) RX9D: Ninth bit of Received Data // This can be address/data bit or a parity bit and must be calculated by user firmware. // ******************************************************* RCSTA=0b10010000; // ******************************************************* // 3.Define BAUDCON(BAUD RATE CONTROL) Register // BAUDCON(7) ABDOVF: Auto-Baud Detect Overflow bit // Asynchronous mode: // 1 = Auto-baud timer overflowed // 0 = Auto-baud timer did not overflow // BAUDCON(6) RCIDL: Receive Idle Flag bit // Asynchronous mode: // 1 = Receiver is Idle // 0 = Start bit has been detected and the receiver is active // BAUDCON(5) DTRXP: Data/Receive Polarity Select bit // Asynchronous mode: // 1 = Receive data (RX) is inverted (active-low) // 0 = Receive data (RX) is not inverted (active-high) // BAUDCON(4) CKTXP: Clock/Transmit Polarity Select bit // Asynchronous mode: // 1 = Idle state for transmit (TX) is low // 0 = Idle state for transmit (TX) is high // BAUDCON(3) BRG16: 16-bit Baud Rate Generator bit // 1 = 16-bit Baud Rate Generator is used (SPBRGH:SPBRG) // 0 = 8-bit Baud Rate Generator is used (SPBRG) // BAUDCON(2) Unimplemented: Read as ‘0’ // BAUDCON(1) WUE: Wake-up Enable bit // Asynchronous mode: // 1 = Receiver is waiting for a falling edge. No character will be received but RCIF will be set on // the falling edge. WUE will automatically clear on the rising edge. // 0 = Receiver is operating normally // BAUDCON(0) ABDEN: Auto-Baud Detect Enable bit // Asynchronous mode: // 1 = Auto-Baud Detect mode is enabled (clears when auto-baud is complete) // 0 = Auto-Baud Detect mode is disabled // ******************************************************* BAUDCON = 0b00001000; // ******************************************************* // 3.Define BRG(EUSART Baud Rate Generator Register) Register // ******************************************************* // BRG = 48000000(Hz)/4/9600(BPS)-1 ==> 0d1249 ==> 0x4E1 // BRG = 16000000(Hz)/4/9600(BPS)-1 ==> 0d0416 ==> 0x1A0 // BRG = 16000000(Hz)/4/19200(BPS)-1 ==> 0d0207 ==> 0x0CF // (1)Define SPBRGH(EUSART Baud Rate Generator Register, High Byte) Register SPBRGH = 0x01; // (2)Define SPBRG(EUSART Baud Rate Generator Register, Low Byte) Register SPBRG = 0xA0; } //****************************************************************************************** // Function Name : SendUART // Title : // Input : // Output : // Description : Write TXREG //****************************************************************************************** void SendUART(char put_data) { char chk_flg; // *************************** // 1.Check Send Flag // *************************** while(1){ chk_flg = TXSTA & 0x02; //0000,0010 TXSTA(TRMT) if(chk_flg != 0x00)break; } // *************************** // 2.Set data // *************************** TXREG = put_data; } //****************************************************************************************** // Function Name : ReciveUART // Title : // Input : // Output : // Description : Read RCREG //****************************************************************************************** void ReciveUART(char *get_data) { char chk_flg; // **************************** // 1.Check Recvive Flag // **************************** while(1){ chk_flg = PIR1 & 0x20; //0010,0000 PIR1(RCIF) if(chk_flg != 0x00)break; } // **************************** // 2.Check error // **************************** chk_flg = RCSTA & 0x06; //0000,0110 RCSTA(FERR,OERR) if(chk_flg != 0x00){ *get_data = 0x00; return; } // **************************** // 3.Set Recive Data // **************************** *get_data = RCREG; } //****************************************************************************************** // Function Name : Wait // Title : wait function // Input : timer(10mS * timer) // Output : //****************************************************************************************** void Wait(unsigned int timer) { unsigned int lp; for(lp=0;lp: Timer1 Input Clock Prescale Select bits // 11 = 1:8 Prescale value // 10 = 1:4 Prescale value // 01 = 1:2 Prescale value // 00 = 1:1 Prescale value //* T1CON(3) T1OSCEN: Timer1 Oscillator Enable bit // 1 = Timer1 oscillator is enabled // 0 = Timer1 oscillator is shut off // The oscillator inverter and feedback resistor are turned off to eliminate power drain. //* T1CON(2) T1SYNC: Timer1 External Clock Input Synchronization Select bit // When TMR1CS = 1: // 1 = Do not synchronize external clock input // 0 = Synchronize external clock input // When TMR1CS = 0: // This bit is ignored. Timer1 uses the internal clock when TMR1CS = 0. //* T1CON(1) TMR1CS: Timer1 Clock Source Select bit // 1 = External clock from the T13CKI pin (on the rising edge) // 0 = Internal clock (FOSC/4) //* T1CON(0) bit 0 TMR1ON: Timer1 On bit // 1 = Enables Timer1 // 0 = Stops Timer1 // ******************************************************* T1CON = 0b10110001; // 16-bit Read/Write Mode, 1:8 Prescale value // ******************************************************* // 2.Define TMR1 Register // Caution(16-bit Read/Write Mode) !!!!: // (a)Writing to TMR1H does not directly affect Timer1. // Instead, the high byte of Timer1 is updated with the contents of TMR1H when a write occurs to TMR1L. // This allows all 16 bits of Timer1 to be updated at once. // (b)A read from TMR1L will load the contents of the high byte of Timer1 into the Timer1 high byte buffer. // This provides the user with the ability to accurately read all 16 bits of Timer1 without the need to // determine whether a read of the high byte, followed by a read of the low byte, has become invalid due // to a rollover or carry between reads. // ******************************************************* // TMR1 data ( OSC:12MHz, 4X PLLON, 1:8 Prescale value, 0.01[S];100Hz ) // 10mS(100Hz): 12MHz * 4(PLLON) / 4(PIC) / 8(Prescale) / 100(100Hz)==> 0d15,000(Count) ==> 0x3A98(Count) // TMR1 = 0xFFFF - 0x3A98 ==> 0xC567 // TMR1 data ( Internal OSC:16MHz, 1:8 Prescale value, 0.01[S];100Hz ) // 10mS(100Hz): 16MHz / 4(PIC) / 8(Prescale) / 100(100Hz)==> 0d5,000(Count) ==> 0x1388(Count) // TMR1 = 0xFFFF - 0x1388 ==> 0xEC77 // TMR1H = 0xEC; TMR1L = 0x77; // ******************************************************* // 3.Timer // ******************************************************* PIR1bits.TMR1IF = 0; while(1){ if(PIR1bits.TMR1IF != 0 )break; } }