全体のソースコードです。こちらからダウンロードも可能です。
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#pragma config FEXTOSC = OFF // FEXTOSC External Oscillator mode Selection bits (Oscillator not enabled) #pragma config RSTOSC = HFINT1 // Power-up default value for COSC bits (HFINTOSC (1MHz)) #pragma config CLKOUTEN = OFF // Clock Out Enable bit (CLKOUT function is disabled; I/O or oscillator function on OSC2) #pragma config CSWEN = ON // Clock Switch Enable bit (Writing to NOSC and NDIV is allowed) #pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is enabled) #pragma config MCLRE = ON // Master Clear Enable bit (MCLR/VPP pin function is MCLR; Weak pull-up enabled) #pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled) #pragma config WDTE = OFF // Watchdog Timer Enable bits (WDT disabled; SWDTEN is ignored) #pragma config LPBOREN = OFF // Low-power BOR enable bit (ULPBOR disabled) #pragma config BOREN = ON // Brown-out Reset Enable bits (Brown-out Reset enabled, SBOREN bit ignored) #pragma config BORV = LOW // Brown-out Reset Voltage selection bit (Brown-out voltage (Vbor) set to 2.45V) #pragma config PPS1WAY = ON // PPSLOCK bit One-Way Set Enable bit (The PPSLOCK bit can be cleared and set only once; PPS registers remain locked after one clear/set cycle) #pragma config STVREN = ON // Stack Overflow/Underflow Reset Enable bit (Stack Overflow or Underflow will cause a Reset) #pragma config DEBUG = OFF // Debugger enable bit (Background debugger disabled) #pragma config WRT = OFF // User NVM self-write protection bits (Write protection off) #pragma config LVP = OFF // Low Voltage Programming Enable bit (High Voltage on MCLR/VPP must be used for programming.) #pragma config CP = OFF // User NVM Program Memory Code Protection bit (User NVM code protection disabled) #pragma config CPD = OFF // Data NVM Memory Code Protection bit (Data NVM code protection disabled) #include <xc.h> #include <stdio.h> #include "i2c.h" #include "lcd_i2c.h" #define _XTAL_FREQ 1000000 #define A RC5 #define B RC4 volatile signed char rot = 0; volatile char rotFlag = 0; void Init(){ TRISA = 0b00001000; ANSELA = 0b00000000; TRISC = 0b00110011; IOCCN = 0b00010000; //Negative (H->L)割り込み ANSELC = 0b00000000; IOCIE = 1; //IOC割り込み許可 PEIE = 1; GIE = 1; } void __interrupt isr(){ GIE = 0; if(IOCCF4){ //RC4:B H->Lの変化 IOCCF4 = 0; if(A == 1) //RC5:A rot--; else rot++; rotFlag = 1; } GIE = 1; } void putch(char c){ lcd_DATA(c); } void main(void) { Init(); I2C_Master_Init(100000); lcd_Init(); lcd_SetCursor(0,0); printf("Rotary Encoder"); while(1){ if(rotFlag){ rotFlag = 0; lcd_SetCursor(1, 0); printf("%d ",rot); } } } |
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void I2C_Master_Init(const unsigned long c); void I2C_Master_Wait(); void I2C_Master_Start(); void I2C_Master_RepeatedStart(); void I2C_Master_Stop(); void I2C_Master_Write(unsigned d); unsigned short I2C_Master_Read(unsigned short a); void SendI2C(char adrs, char data); void CmdI2C(char adrs, char reg, char data); void GetDataI2C(char adrs, char* buf, char cnt); |
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#include<xc.h> #define _XTAL_FREQ 1000000 void I2C_Master_Init(const unsigned long c){ SSP2CON1 = 0x28; //SSP2 Module as Master SSP2CON2 = 0x00; SSP2CON3 = 0x00; SSP2ADD = (_XTAL_FREQ/(4*c))-1; //Setting Clock Speed SSP2STAT = 0x80; SSP2CLKPPS = 0x10; //PPS Settings SSP2DATPPS = 0x11; // SCL : RC0 RC0PPS = 0x1a; // SDA : RC1 RC1PPS = 0x1b; } void I2C_Master_Wait(){ while ((SSP2STAT & 0x04) || (SSP2CON2 & 0x1F)); //Transmit is in progress } void I2C_Master_Start(){ I2C_Master_Wait(); SSP2CON2bits.SEN = 1; //Initiate start condition } void I2C_Master_RepeatedStart(){ I2C_Master_Wait(); SSP2CON2bits.RSEN = 1; //Initiate repeated start condition } void I2C_Master_Stop(){ I2C_Master_Wait(); SSP2CON2bits.PEN = 1; //Initiate stop condition } void I2C_Master_Write(unsigned d){ I2C_Master_Wait(); SSP2BUF = d; //Write data to SSP2BUF } unsigned short I2C_Master_Read(unsigned short a){ unsigned short temp; I2C_Master_Wait(); SSP2CON2bits.RCEN = 1; I2C_Master_Wait(); temp = SSP2BUF; //Read data from SSP2BUF I2C_Master_Wait(); SSP2CON2bits.ACKDT = a; //Acknowledge bit 1:Not Ack 0:Ack SSP2CON2bits.ACKEN = 1; //Acknowledge sequence return temp; } void SendI2C(char adrs, char data){ I2C_Master_Start(); I2C_Master_Write(adrs<<1); //SlaveAdress + Write I2C_Master_Write(data); //mainly RegisterAdress I2C_Master_Stop(); } void CmdI2C(char adrs, char reg, char data){ I2C_Master_Start(); I2C_Master_Write(adrs<<1); //SlaveAdress + Write I2C_Master_Write(reg); //RegisterAdress I2C_Master_Write(data); I2C_Master_Stop(); } void GetDataI2C(char adrs, char* buf, char cnt){ I2C_Master_Start(); I2C_Master_Write((adrs<<1)+1); //SlaveAdress + Read for(char i=0; i<cnt-1; i++) buf[i] = I2C_Master_Read(0); //ACK buf[cnt-1] = I2C_Master_Read(1); //NACK I2C_Master_Stop(); } |
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void lcd_INST(char command); void lcd_DATA(char data); void lcd_Init(); void lcd_SetCursor(char row,char column); |
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#include "i2c.h" #include <xc.h> #define _XTAL_FREQ 1000000 //#define CONTRAST 0x20 //for 3.3V #define CONTRAST 0x08 //for 5V const char lcd_DDRAM[4] = {0x00, 0x40, 0x14, 0x54}; void lcd_INST(char command){ I2C_Master_Start(); I2C_Master_Write(0x7C); //SlaveAdress + Write I2C_Master_Write(0x00); //Instruction I2C_Master_Write(command); //data byte I2C_Master_Stop(); __delay_us(30); } void lcd_DATA(char data){ I2C_Master_Start(); I2C_Master_Write(0x7C); //SlaveAdress + Write I2C_Master_Write(0x40); //Data I2C_Master_Write(data); //data byte I2C_Master_Stop(); __delay_us(30); } void lcd_Init(){ __delay_ms(40); lcd_INST(0x38); //Function Set lcd_INST(0x39); //Function Set lcd_INST(0x14); //Internal OSC Frequency lcd_INST(0x70 + (CONTRAST & 0x0f)); //Contrast Set lcd_INST(0x54 + ((CONTRAST & 0xf0)>>4)); //Power/ICON/Contrast control lcd_INST(0x6c); //Follower control __delay_ms(200); lcd_INST(0x38); //Function Set lcd_INST(0x0c); //Display ON/OFF control lcd_INST(0x01); //Clear Display __delay_ms(2); } void lcd_SetCursor(char row, char column){ //行、列は0番目から const char lcd_DDRAM[4] = {0x00, 0x40, 0x14, 0x54}; //各行の先頭アドレス char adrs = lcd_DDRAM[row] + column; //指定位置のアドレス lcd_INST(0x80 + adrs); } |
