//****************************************************************************************** // PIC18F14K50 Sample Program // Project : // Program Name : // Programer : // Create date : Version 1.0 H21.12.20 // 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 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 InitADC(void); void GetADC(unsigned int *); //****************************************************************************************** // Program : // Title : // Input : // Output : //****************************************************************************************** void main(void) { unsigned int adc_data; unsigned long int adc_data_l; char tmp_data_s[30] ; // ***************************** // 1.Initialized Segment // ***************************** // (1)Define I/O port TRISA = 0xFF; TRISB = 0xFF; TRISC = 0xFF; // (2)Initialize EUSAR InitUART(); // (3)Initialize A/D Converter InitADC(); // ***************************** // 2.Program main // ***************************** // (1)Send Message strcpypgm2ram(tmp_data_s," PIC18F14K50 Connected OK> "); SendUART_s(tmp_data_s); // (2)Main program while(1){ // 2-1)Get A/D_Converter_data GetADC(&adc_data); // 2-2)Convert data adc_data_l = adc_data ; adc_data_l = adc_data_l * (long int)5000 / (long int)1024 ; adc_data = adc_data_l; // 2-3)Convert string sprintf(tmp_data_s,"%5d",adc_data); // 2-4)Put data SendUART_s(tmp_data_s); // 2-5)Put message strcpypgm2ram(tmp_data_s,"[mV] "); SendUART_s(tmp_data_s); // 2-6)Wait 1 second Wait(100); // Wait 1 Second }; } //****************************************************************************************** // Function Name : InitADC // Title : // Input : // Output : // Description : Analog Channel Select (AN10) //****************************************************************************************** void InitADC(void) { // ******************************************************* // 0.Define ANSEL(ANALOG SELECT REGISTER) and ANSELH(ANALOG SELECT REGISTER 2) // ******************************************************* // ==> See InitUART_function // ANSEL = 0b11111000; // ANSELH = 0b00001111; // ******************************************************* // 1.Define ADCON0(A/D CONTROL REGISTER 0) Register // ADCON0(7-6) Unimplemented: Read as e0f // ADCON0(5-2) CHS<3:0>: Analog Channel Select bits // 0000 = Reserved // 0001 = Reserved // 0010 = Reserved // 0011 = AN3 // 0100 = AN4 // 0101 = AN5 // 0110 = AN6 // 0111 = AN7 // 1000 = AN8 // 1001 = AN9 // 1010 = AN10 // 1011 = AN11 // 1100 = Reserved // 1101 = Reserved // 1110 = DAC // 1111 = FVR // ADCON0(1) GO/DONE: A/D Conversion Status bit // 1 = A/D conversion cycle in progress. Setting this bit starts an A/D conversion cycle. // This bit is automatically cleared by hardware when the A/D conversion has completed. // 0 = A/D conversion completed/not in progress // ADCON0(0) ADON: ADC Enable bit // 1 = ADC is enabled // 0 = ADC is disabled and consumes no operating current // ******************************************************* ADCON0 = 0b00101001; // ******************************************************* // 2.Define ADCON1(A/D CONTROL REGISTER 1) Register // ADCON1(7-4) Unimplemented: Read as e0f // ADCON1(3-2) PVCFG<1:0>: Positive Voltage Reference select bit // 00 = Positive voltage reference supplied internally by VDD. // 01 = Positive voltage reference supplied externally through VREF+ pin. // 10 = Positive voltage reference supplied internally through FVR. // 11 = Reserved. // ADCON1(1-0) NVCFG<1:0>: Negative Voltage Reference select bit // 00 = Positive voltage reference supplied internally by VSS. // 01 = Positive voltage reference supplied externally through VREF- pin. // 10 = Reserved. // 11 = Reserved. // ******************************************************* ADCON1 = 0b00000000; // ******************************************************* // 3.Define ADCON2(A/D CONTROL REGISTER 2) Register // ADCON2(7) ADFM: A/D Conversion Result Format Select bit // 1 = Right justified // 0 = Left justified // ADCON2(6) Unimplemented: Read as e0f // ADCON2(5-3) ACQT<2:0>: A/D Acquisition time select bits. Acquisition time is the duration that the A/D charge // holding capacitor remains connected to A/D channel from the instant the GO/DONE bit is set until // conversions begins. // 000 = 0(1) // 001 = 2 TAD // 010 = 4 TAD // 011 = 6 TAD // 100 = 8 TAD // 101 = 12 TAD // 110 = 16 TAD // 111 = 20 TAD // ADCON2(2-0) ADCS<2:0>: A/D Conversion Clock Select bits // 000 = FOSC/2 // 001 = FOSC/8 // 010 = FOSC/32 // 011 = FRC(1) (clock derived from a dedicated internal oscillator = 600 kHz nominal) // 100 = FOSC/4 // 101 = FOSC/16 // 110 = FOSC/64 // 111 = FRC(1) (clock derived from a dedicated internal oscillator = 600 kHz nominal) // ******************************************************* ADCON2 = 0b10111110; } //****************************************************************************************** // Function Name : GetADC // Title : // Input : // Output : // Description : //****************************************************************************************** void GetADC(unsigned int *adc_data) { unsigned char Dat_L,Dat_H; // ***************** // 1.Start ADC // ***************** // GO/DONE: A/D Conversion Status bit ADCON0 = ADCON0 | 0b00000010; // ***************** // 2.Get data // ***************** while((ADCON0 & 0b00000010)!=0); Dat_H = ADRESH; Dat_L = ADRESL; // ***************** // 3.Edit data // ***************** *adc_data = Dat_H * 256 + Dat_L; } //****************************************************************************************** // 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ft 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ft 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ft 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 e0f // 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 // (1)Define SPBRGH(EUSART Baud Rate Generator Register, High Byte) Register SPBRGH = 0x4; // (2)Define SPBRG(EUSART Baud Rate Generator Register, Low Byte) Register SPBRG = 0xE1; } //****************************************************************************************** // 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 // TMR1H = 0xC5; TMR1L = 0x67; // ******************************************************* // 3.Timer // ******************************************************* PIR1bits.TMR1IF = 0; while(1){ if(PIR1bits.TMR1IF != 0 )break; } }