PICとグラフィックLCDでシンプルな卓上時計を作ってみた

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データ変換ツールはこちら。

▼グラフィックLCDライブラリ

sed1520.h

void Sed_Cmd(char c); void Sed_Dat(char c); void Sed_SetAddress(char page, char column); void Sed_Init();

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void Sed_Cmd(char c); void Sed_Dat(char c); void Sed_SetAddress(char page, char column); void Sed_Init();

sed1520.c

#include <xc.h> #include "sed1520.h" #define _XTAL_FREQ 125000 #define A0 RA2 #define E1 RA5 #define E2 RA4 #define DATAPORT PORTC char currentPage = 0; // データ送信先の判断とページインクリメントの char currentColumn = 0; // ために現在のアドレスを保持 void Sed_Cmd(char c){ // コマンドは両方の制御ICに送信 A0 = 0; DATAPORT = c; E1 = 1; E2 = 1; E1 = 0; E2 = 0; __delay_us(40); } void Sed_Dat(char c){ A0 = 1; DATAPORT = c; if(currentColumn < 61){ // 送信先判断 E1 = 1; E1 = 0; } else{ E2 = 1; E2 = 0; } currentColumn++; // コラム自動インクリメント if(currentColumn == 122){ // ページ手動インクリメント currentColumn = 0; currentPage = (currentPage + 1) % 4; Sed_SetAddress(currentPage, currentColumn); } __delay_us(40); } void Sed_SetAddress(char page, char column){ currentPage = page; currentColumn = column; Sed_Cmd(0b10111000 + page); // 両方ともページセット if(column < 61){ // 前半の場合は後半のコラムを0にするのも DATAPORT = column; E1 = 1; E1 = 0; DATAPORT = 0; E2 = 1; E2 = 0; } else{ DATAPORT = column-61; E2 = 1; E2 = 0; } } void Sed_Init(){ Sed_Cmd(0b10101111); //Display ON Sed_SetAddress(0,0); //page 0, column 0 }

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#include <xc.h> #include "sed1520.h"   #define _XTAL_FREQ 125000   #define A0 RA2 #define E1 RA5 #define E2 RA4 #define DATAPORT PORTC   char currentPage = 0;       // データ送信先の判断とページインクリメントの char currentColumn = 0;     // ために現在のアドレスを保持   void Sed_Cmd(char c){       // コマンドは両方の制御ICに送信     A0 = 0;     DATAPORT = c;     E1 = 1;     E2 = 1;     E1 = 0;     E2 = 0;     __delay_us(40); }   void Sed_Dat(char c){     A0 = 1;     DATAPORT = c;          if(currentColumn < 61){     // 送信先判断         E1 = 1;         E1 = 0;     }     else{         E2 = 1;         E2 = 0;     }          currentColumn++;            // コラム自動インクリメント     if(currentColumn == 122){   // ページ手動インクリメント         currentColumn = 0;         currentPage = (currentPage + 1) % 4;                  Sed_SetAddress(currentPage, currentColumn);     }         __delay_us(40); }   void Sed_SetAddress(char page, char column){     currentPage = page;     currentColumn = column;          Sed_Cmd(0b10111000 + page); // 両方ともページセット          if(column < 61){            // 前半の場合は後半のコラムを0にするのも         DATAPORT = column;         E1 = 1;         E1 = 0;                  DATAPORT = 0;         E2 = 1;         E2 = 0;     }     else{         DATAPORT = column-61;         E2 = 1;         E2 = 0;     } }   void Sed_Init(){     Sed_Cmd(0b10101111);  //Display ON     Sed_SetAddress(0,0);  //page 0, column 0 }

▼I2Cライブラリ

i2c.h

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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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);

i2c.c

#include<xc.h> #define _XTAL_FREQ 125000 void I2C_Master_Init(const unsigned long c){ SSP1CON1 = 0x28; //SSP1 Module as Master SSP1CON2 = 0x00; SSP1CON3 = 0x00; SSP1ADD = (_XTAL_FREQ/(4*c))-1; //Setting Clock Speed SSP1STAT = 0x80; SSP1CLKPPS = 0x0E; //PPS Settings SSP1DATPPS = 0x0C; // SCL : RB6 RB6PPS = 0x18; // SDA : RB4 RB4PPS = 0x19; } void I2C_Master_Wait(){ while ((SSP1STAT & 0x04) || (SSP1CON2 & 0x1F)); //Transmit is in progress } void I2C_Master_Start(){ I2C_Master_Wait(); SSP1CON2bits.SEN = 1; //Initiate start condition } void I2C_Master_RepeatedStart(){ I2C_Master_Wait(); SSP1CON2bits.RSEN = 1; //Initiate repeated start condition } void I2C_Master_Stop(){ I2C_Master_Wait(); SSP1CON2bits.PEN = 1; //Initiate stop condition } void I2C_Master_Write(unsigned d){ I2C_Master_Wait(); SSP1BUF = d; //Write data to SSP1BUF } unsigned short I2C_Master_Read(unsigned short a){ unsigned short temp; I2C_Master_Wait(); SSP1CON2bits.RCEN = 1; I2C_Master_Wait(); temp = SSP1BUF; //Read data from SSP1BUF I2C_Master_Wait(); SSP1CON2bits.ACKDT = a; //Acknowledge bit 1:Not Ack 0:Ack SSP1CON2bits.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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#include<xc.h> #define _XTAL_FREQ 125000   void I2C_Master_Init(const unsigned long c){   SSP1CON1 = 0x28;                //SSP1 Module as Master   SSP1CON2 = 0x00;   SSP1CON3 = 0x00;   SSP1ADD = (_XTAL_FREQ/(4*c))-1; //Setting Clock Speed   SSP1STAT = 0x80;      SSP1CLKPPS = 0x0E;              //PPS Settings   SSP1DATPPS = 0x0C;              // SCL : RB6   RB6PPS = 0x18;                  // SDA : RB4   RB4PPS = 0x19; } void I2C_Master_Wait(){   while ((SSP1STAT & 0x04) || (SSP1CON2 & 0x1F)); //Transmit is in progress      } void I2C_Master_Start(){   I2C_Master_Wait();       SSP1CON2bits.SEN = 1;           //Initiate start condition } void I2C_Master_RepeatedStart(){   I2C_Master_Wait();   SSP1CON2bits.RSEN = 1;          //Initiate repeated start condition } void I2C_Master_Stop(){   I2C_Master_Wait();   SSP1CON2bits.PEN = 1;           //Initiate stop condition } void I2C_Master_Write(unsigned d){   I2C_Master_Wait();   SSP1BUF = d;                    //Write data to SSP1BUF } unsigned short I2C_Master_Read(unsigned short a){   unsigned short temp;   I2C_Master_Wait();   SSP1CON2bits.RCEN = 1;   I2C_Master_Wait();   temp = SSP1BUF;                 //Read data from SSP1BUF   I2C_Master_Wait();   SSP1CON2bits.ACKDT = a;         //Acknowledge bit 1:Not Ack 0:Ack   SSP1CON2bits.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(); }

▼BME280ライブラリ

bme280.h

void bme_Init(void); void bme_ForceMeasurement(int* temp, int* hum, int* pres);

1 2	void bme_Init(void); void bme_ForceMeasurement(int* temp, int* hum, int* pres);

bme280.c

#include <xc.h> #include "i2c.h" #define _XTAL_FREQ 125000 const int TMAX = 2251, TMIN = 1755, HMAX = 353, HMIN = 193, PMAX = 567, PMIN = 519; const int TEMPTABLE[] = {0,0,0,1,2,3,4,4,5,6,7,8,8,9,10,11,12,12,13,14,15,16,16,17,18,19,20,21,21,22,23,24,25,25,26,27,28,29,29,30,31,32,33,33,34,35,36,37,38,38,39,40,41,42,42,43,44,45,46,46,47,48,49,50,50,51,52,53,54,55,55,56,57,58,59,59,60,61,62,63,63,64,65,66,67,67,68,69,70,71,72,72,73,74,75,76,76,77,78,79,80,80,81,82,83,84,84,85,86,87,88,88,89,90,91,92,93,93,94,95,96,97,97,98,99,100,101,101,102,103,104,105,105,106,107,108,109,110,110,111,112,113,114,114,115,116,117,118,118,119,120,121,122,122,123,124,125,126,127,127,128,129,130,131,131,132,133,134,135,135,136,137,138,139,139,140,141,142,143,144,144,145,146,147,148,148,149,150,151,152,152,153,154,155,156,156,157,158,159,160,161,161,162,163,164,165,165,166,167,168,169,169,170,171,172,173,173,174,175,176,177,178,178,179,180,181,182,182,183,184,185,186,186,187,188,189,190,190,191,192,193,194,194,195,196,197,198,199,199,200,201,202,203,203,204,205,206,207,207,208,209,210,211,211,212,213,214,215,216,216,217,218,219,220,220,221,222,223,224,224,225,226,227,228,228,229,230,231,232,233,233,234,235,236,237,237,238,239,240,241,241,242,243,244,245,245,246,247,248,249,250,250,251,252,253,254,254,255,256,257,258,258,259,260,261,262,262,263,264,265,266,267,267,268,269,270,271,271,272,273,274,275,275,276,277,278,279,279,280,281,282,283,284,284,285,286,287,288,288,289,290,291,292,292,293,294,295,296,296,297,298,299,300,301,301,302,303,304,305,305,306,307,308,309,309,310,311,312,313,313,314,315,316,317,318,318,319,320,321,322,322,323,324,325,326,326,327,328,329,330,330,331,332,333,334,335,335,336,337,338,339,339,340,341,342,343,343,344,345,346,347,347,348,349,350,351,351,352,353,354,355,356,356,357,358,359,360,360,361,362,363,364,364,365,366,367,368,368,369,370,371,372,373,373,374,375,376,377,377,378,379,380,381,381,382,383,384,385,385,386,387,388,389,390,390,391,392,393,394,394,395,396,397,398,398,399,400}; const int HUMTABLE[] = {0,1,1,2,3,3,4,5,5,6,7,7,8,8,9,10,10,11,12,12,13,13,14,15,15,16,17,17,18,18,19,20,20,21,22,22,23,24,24,25,25,26,27,27,28,29,29,30,30,31,32,32,33,34,34,35,35,36,37,37,38,39,39,40,40,41,42,42,43,44,44,45,45,46,47,47,48,49,49,50,50,51,52,52,53,53,54,55,55,56,57,57,58,58,59,60,60,61,62,62,63,63,64,65,65,66,67,67,68,68,69,70,70,71,71,72,73,73,74,75,75,76,76,77,78,78,79,80,80,81,81,82,83,83,84,84,85,86,86,87,88,88,89,89,90,91,91,92,92,93,94,94,95,96,96,97,97,98,99,99,100}; const signed char PRESTABLE[] = {20,19,18,17,16,16,15,14,13,12,12,11,10,9,8,7,7,6,5,4,3,2,2,1,0,-1,-2,-3,-3,-4,-5,-6,-7,-7,-8,-9,-10,-11,-12,-12,-13,-14,-15,-16,-17,-17,-18,-19,-20}; void bme_Init(void){ CmdI2C(0x76, 0xE0, 0xB6); // reset CmdI2C(0x76, 0xF2, 0x01); // Ctrl_hum_reg CmdI2C(0x76, 0xF4, 0x25); // Ctrl_meas_reg /Forced mode CmdI2C(0x76, 0xF5, 0xA0); // config/reg } void bme_ForceMeasurement(int* temp, int* hum, int* pres){ CmdI2C(0x76, 0xF4, 0x25); // Ctrl_meas_reg /Forced mode __delay_ms(30); char buf[8]; SendI2C(0x76, 0xF7); GetDataI2C(0x76, buf, 8); // Get from 0xF7 to 0xFE int temp12 = ((buf[3] << 4) | ((buf[4] >> 4) & 0x0F)); // 各ビット数のインデックスに変換 int hum9 = ((buf[6] << 1) | ((buf[7] >> 7) & 0x01)); int pres11 = ((buf[0] << 3) | ((buf[1] >> 5) & 0x07)); if (temp12 > TMAX) temp12 = TMAX; //インデックスが範囲外なら修正 else if(temp12 < TMIN) temp12 = TMIN; temp12 -= TMIN; if (hum9 > HMAX) hum9 = HMAX; else if(hum9 < HMIN) hum9 = HMIN; hum9 -= HMIN; if (pres11 > PMAX) pres11 = PMAX; else if(pres11 < PMIN) pres11 = PMIN; pres11 -= PMIN; *temp = TEMPTABLE[temp12]; // 温度結果 *hum = HUMTABLE[hum9]; // 湿度結果 *pres = PRESTABLE[pres11] + 1013; // 気圧結果 return; }

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#include <xc.h> #include "i2c.h"   #define _XTAL_FREQ 125000   const int TMAX = 2251, TMIN = 1755, HMAX = 353, HMIN = 193, PMAX = 567, PMIN = 519; const int TEMPTABLE[] = {0,0,0,1,2,3,4,4,5,6,7,8,8,9,10,11,12,12,13,14,15,16,16,17,18,19,20,21,21,22,23,24,25,25,26,27,28,29,29,30,31,32,33,33,34,35,36,37,38,38,39,40,41,42,42,43,44,45,46,46,47,48,49,50,50,51,52,53,54,55,55,56,57,58,59,59,60,61,62,63,63,64,65,66,67,67,68,69,70,71,72,72,73,74,75,76,76,77,78,79,80,80,81,82,83,84,84,85,86,87,88,88,89,90,91,92,93,93,94,95,96,97,97,98,99,100,101,101,102,103,104,105,105,106,107,108,109,110,110,111,112,113,114,114,115,116,117,118,118,119,120,121,122,122,123,124,125,126,127,127,128,129,130,131,131,132,133,134,135,135,136,137,138,139,139,140,141,142,143,144,144,145,146,147,148,148,149,150,151,152,152,153,154,155,156,156,157,158,159,160,161,161,162,163,164,165,165,166,167,168,169,169,170,171,172,173,173,174,175,176,177,178,178,179,180,181,182,182,183,184,185,186,186,187,188,189,190,190,191,192,193,194,194,195,196,197,198,199,199,200,201,202,203,203,204,205,206,207,207,208,209,210,211,211,212,213,214,215,216,216,217,218,219,220,220,221,222,223,224,224,225,226,227,228,228,229,230,231,232,233,233,234,235,236,237,237,238,239,240,241,241,242,243,244,245,245,246,247,248,249,250,250,251,252,253,254,254,255,256,257,258,258,259,260,261,262,262,263,264,265,266,267,267,268,269,270,271,271,272,273,274,275,275,276,277,278,279,279,280,281,282,283,284,284,285,286,287,288,288,289,290,291,292,292,293,294,295,296,296,297,298,299,300,301,301,302,303,304,305,305,306,307,308,309,309,310,311,312,313,313,314,315,316,317,318,318,319,320,321,322,322,323,324,325,326,326,327,328,329,330,330,331,332,333,334,335,335,336,337,338,339,339,340,341,342,343,343,344,345,346,347,347,348,349,350,351,351,352,353,354,355,356,356,357,358,359,360,360,361,362,363,364,364,365,366,367,368,368,369,370,371,372,373,373,374,375,376,377,377,378,379,380,381,381,382,383,384,385,385,386,387,388,389,390,390,391,392,393,394,394,395,396,397,398,398,399,400}; const int HUMTABLE[] = {0,1,1,2,3,3,4,5,5,6,7,7,8,8,9,10,10,11,12,12,13,13,14,15,15,16,17,17,18,18,19,20,20,21,22,22,23,24,24,25,25,26,27,27,28,29,29,30,30,31,32,32,33,34,34,35,35,36,37,37,38,39,39,40,40,41,42,42,43,44,44,45,45,46,47,47,48,49,49,50,50,51,52,52,53,53,54,55,55,56,57,57,58,58,59,60,60,61,62,62,63,63,64,65,65,66,67,67,68,68,69,70,70,71,71,72,73,73,74,75,75,76,76,77,78,78,79,80,80,81,81,82,83,83,84,84,85,86,86,87,88,88,89,89,90,91,91,92,92,93,94,94,95,96,96,97,97,98,99,99,100}; const signed char PRESTABLE[] = {20,19,18,17,16,16,15,14,13,12,12,11,10,9,8,7,7,6,5,4,3,2,2,1,0,-1,-2,-3,-3,-4,-5,-6,-7,-7,-8,-9,-10,-11,-12,-12,-13,-14,-15,-16,-17,-17,-18,-19,-20};   void bme_Init(void){     CmdI2C(0x76, 0xE0, 0xB6);           // reset     CmdI2C(0x76, 0xF2, 0x01);           // Ctrl_hum_reg     CmdI2C(0x76, 0xF4, 0x25);           // Ctrl_meas_reg /Forced mode     CmdI2C(0x76, 0xF5, 0xA0);           // config/reg }   void bme_ForceMeasurement(int* temp, int* hum, int* pres){         CmdI2C(0x76, 0xF4, 0x25);           // Ctrl_meas_reg /Forced mode     __delay_ms(30);       char buf[8];     SendI2C(0x76, 0xF7);     GetDataI2C(0x76, buf, 8);           // Get from 0xF7 to 0xFE          int temp12 = ((buf[3] << 4) | ((buf[4] >> 4) & 0x0F));    // 各ビット数のインデックスに変換     int hum9   = ((buf[6] << 1) | ((buf[7] >> 7) & 0x01));     int pres11 = ((buf[0] << 3) | ((buf[1] >> 5) & 0x07));          if     (temp12 > TMAX)  temp12 =  TMAX;  //インデックスが範囲外なら修正     else if(temp12 < TMIN)  temp12 =  TMIN;     temp12 -= TMIN;          if     (hum9   > HMAX)  hum9   =  HMAX;     else if(hum9   < HMIN)  hum9   =  HMIN;     hum9   -= HMIN;          if     (pres11 > PMAX)  pres11 =  PMAX;     else if(pres11 < PMIN)  pres11 =  PMIN;     pres11 -= PMIN;               *temp = TEMPTABLE[temp12];         // 温度結果     *hum  = HUMTABLE[hum9];            // 湿度結果     *pres = PRESTABLE[pres11] + 1013;  // 気圧結果       return; }

bme280.cの32, 36, 40行目にミスがありました。こちらのページのプログラムは修正済みですが、ダウンロード用のファイルは未修正なのでご注意ください。