RTC and MMC and interrupt

[Aoday]

I am using 18F452 PIC and I connected the RTC to port A and the MMC to the normal SPI port I read continuosly from the mmc and send the data to UART port and I tried to read from the RTC the reading is almost error but if i stopped the interrupt the RTC work very nice? anybody can help why?

[Aoday]

Update
after I checked the signals using osciloscope i found that the data that sent to the RTC is different if i used without interrupt the data is ok and with interrupt the data all 255 i dont know why i used same function in both programs

[Aoday]

update :
after many invistigations i found that (Mmc_Fat_Assign(&filename, 0)) make the soft i2c no function this is my code

Code: Select all

/*
this program for second controller in lighting control project
* the program takes data parallel through PORTA from first controller
* send the recived data serially through PORTA pin0
* send sync pulse at the begining of each byte
last update date 12-04-2007

*/

#include <built_in.h>

unsigned short sssss[4],see,mte,hhe,dde,moe,yye,ini_ok=0,cc,tnum[5],ses,mts,hhs,dds,mos,yys,dcount,set_flag=0,dis=0,dis_flag=0;
unsigned short keytemp,ini_fl,J,fr_fl,key_byt=0,key1=0,slave_no=255,slave_change_flag=0,scano=0xe0,scani=0,scan_fl=0,ret_no,temp_del=0;
unsigned short keyl=0,keyl1=0,prog_no,nocnt=0,frcnt=0,oldstate=0,col_type=1,re=0,gr=0,bl=0,scan_temp;
unsigned bcnt=512,col=0;
char filename[14]= "BEEBUL01BIN",txt[4];
unsigned long size,size_temp=0;
const char ser[]="Aoday H Mohamed";
void Zero_Fill(char *value) {                      // fill text repesentation
  if (value[1] == 0) {                             //      with leading zero
    value[1] = value[0];
    value[0] = 48;
    value[2] = 0;
  }
}//~
char *R_Trim(char *str1){

  while (*str1 == ' ')
    str1++;
  return str1;
}//~
void Display_Time(char sec, char mnt, char hr, char day, char mn, char year) {
  char *tc;

   ByteToStr(day, tnum);                           // day
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(1,1, tc);
   Lcd_Chr_Cp('-');
   ByteToStr(mn, tnum);                            // month
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out_cp(tc);
   Lcd_Chr_Cp('-');
   ByteToStr(year, tnum);                            // month
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out_cp(tc);
   LCD_Out_cp("  ");
   /*if (hr>12) {
    ByteToStr(hr-12,tnum);                             // hour\
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(1,14,tc);
    } else {
    if (hr==0){
   LCD_Out(1,14,"12");
    }else{  */
    ByteToStr(hr,tnum);                             // hour
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(1,11,tc);
//   }
//    }

   Lcd_Chr_Cp(':');
   ByteToStr(mnt,tnum);                            // minute
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out_cp(tc);
//   Lcd_Out(1,12,"  ");
/*   if (hr<12) {
    Lcd_Out(1,19,"AM");
    } else {
    Lcd_Out(1,19,"PM");
    }
   ByteToStr(sec,tnum);                            // seconds
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(2,12,tc);*/
}//~
void Read_RTC() {
  Soft_I2C_Start();
  Soft_I2C_Write(0xD0);
  Soft_I2C_Write(0);
  Soft_I2C_Start();
  Soft_I2C_Write(0xD1);
  sssss[1]=88;
  see = Soft_I2C_Read(1) & 127;
  mte = Soft_I2C_Read(1) & 127;
  hhe = Soft_I2C_Read(1) & 63;
  dde = Soft_I2C_Read(1) & 63;
  dde = Soft_I2C_Read(1) & 63;
  moe = Soft_I2C_Read(1) & 31;
  yye = Soft_I2C_Read(0);
  I2C_Stop();


  see  =  ((see & 0xF0) >> 4)*10 + (see & 0x0F);
  mte  =  ((mte & 0xF0) >> 4)*10 + (mte & 0x0F);
  hhe   =  ((hhe & 0xF0) >> 4)*10 + (hhe & 0x0F);
  yye =  ((yye & 0xF0) >> 4)*10 + (yye & 0x0F);
  dde  =  ((dde & 0xf0) >> 4)*10 + (dde & 0x0F);
  moe   =  ((moe & 0xf0) >> 4)*10 + (moe & 0x0F);
}//~

void col_print() {
               if (slave_change_flag) {
                  switch (col_type) {
                  case 1:{
                  Lcd_Out(2,1,"Red:            ");
                  ByteToStr(re,txt);
                  Lcd_Out(2,10,txt);
                  break;
                  }
                  case 2:{
                  Lcd_Out(2,1,"Green:          ");
                  ByteToStr(gr,txt);
                  Lcd_Out(2,10,txt);
                  break;
                  }
                  case 3:{
                  Lcd_Out(2,1,"Blue:           ");
                  ByteToStr(bl,txt);
                  Lcd_Out(2,10,txt);
                  break;
                  }
                 }
               }
               col=bl*0x400+gr*0x20+re;
//               b1:=bc*$400+gc*$20+rc
}
unsigned short Keypad() {
    PORTD=scano;
    scani=PORTD & 0x0F;
    if ((scani == 0x0f) && (scano==scan_temp)) {
       scan_fl=0;
       }
    if ((scani != 0x0f) && (scan_fl==0)) {
       scan_fl=1;
       scan_temp=scano;
       ret_no= scano | scani;
    } else ret_no=255;
    scano=scano<<1;
    if (scano!=0xe0) scano=scano | 0x10;
    return ret_no;
}
void main_init() {
  TRISB = 0;           // PORTB is output
  TRISE = 0;           // PORTE is output
  TRISD = 0x0f;           // PORTD is output
  TRISA = 0;           // PORTA is output
  PORTB = 0;
  PORTA = 0;
  TMR0L = 96;
  ini_fl = 0;
  sssss[1]=41;
  Usart_Init(115200);       // init the USART at 38400 baude casue *4
Delay_1sec();
  T0CON = 0xC2;        // Assign prescaler to TMR0
  ADCON1=7;
Delay_1sec();
Soft_I2C_Config(&PORTA, 0,1);                  // initialize I2C
//   I2C_Init(100000);      // initialize full master mode
}

void interrupt() {
if (ini_fl==0) {
ini_fl=1;
Spi_Init_Advanced(MASTER_OSC_DIV16, DATA_SAMPLE_MIDDLE, CLK_IDLE_LOW, LOW_2_HIGH);
Lcd_Init(&PORTB);
Lcd_Cmd(LCD_CURSOR_OFF);
Lcd_Cmd(LCD_CLEAR);
Lcd_Out(1,1,"   PowerMicro");
Lcd_Out(2,1," Master control");
//Delay_1sec();
Lcd_Cmd(LCD_CLEAR);
Lcd_Out(1,1,"Please Wait....");
Lcd_Out(2,1,"Now Prog. No.");
  prog_no = Eeprom_Read(0);
                filename[6]=prog_no/10+0x30;
                filename[7]=prog_no%10+0x30;
                ByteToStr(prog_no,txt);
                Lcd_Out(2,14,txt);
if (Mmc_Fat_Init(&PORTC, 2) == 0)
{
Spi_Init_Advanced(MASTER_OSC_DIV4, DATA_SAMPLE_MIDDLE, CLK_IDLE_LOW, LOW_2_HIGH);
if (Mmc_Fat_Assign(&filename, 0))
{
// Mmc_Fat_Reset(&size);
// Lcd_Out(1,1,"Press Program No.");
 }else {
 /*      Lcd_Out(1,1,"There is no Data");
                prog_no=1;
                Eeprom_Write(0,prog_no);
                key1=0;
                ini_fl=0;
   */   }
} else Lcd_Out(1,1,"No MMC card     ");
//Soft_I2C_Config(&PORTA, 0,1);                  // initialize I2C

}
  Read_RTC();
Display_Time(see,mte,hhe,dde,moe,yye);

/* bcnt++;
 if (bcnt==512) bcnt=0;
//Mmc_Fat_Read(&J);
//Usart_Write(j);
//size--;
size_temp++;
if (size_temp>=size) {
bcnt=0;
//Mmc_Fat_Assign(&filename,0);
//Mmc_Fat_Reset(&size);
size_temp=0;
temp_del++;
//Display_Time(see,mte,hhe,dde,moe,yye);
     ByteToStr(temp_del,txt);
     Lcd_Out(2,1,txt);
}
Read_RTC();
Delay_100ms();
     ByteToStr(mte,txt);
     Lcd_Out(2,5,txt);
     if (keyl1==1) {
     keyl1=0;
    switch (key_byt) {
      case  126: {
                if (!slave_change_flag) {
                key_byt = 65;
                prog_no=key1;
                Eeprom_Write(0,prog_no);
                key1=0;
                ini_fl=0;
                } else {
               slave_no=key1;/// slave change
               Lcd_Out(1,1,"slave :         ");
               ByteToStr(key1,txt);
               Lcd_Out(1,10,txt);
               col_print();
                }

                 break;
                 } // A
      case  119: key_byt = 1; break; // 1
      case  123: key_byt = 2; break; // 2
      case  125: key_byt = 3; break; // 3
      case  183: key_byt = 4; break; // 4
      case  187: key_byt = 5; break; // 5
      case  189: key_byt = 6; break; // 6
      case  190: {
               slave_change_flag=~slave_change_flag;
               if (slave_change_flag) {
                   Lcd_Out(1,1," Press slave No:");
                   key1=0;
                  } else {
                   Lcd_Out(1,1,"Press Program No");
                   key1=0;
                  }
               key_byt = 66;
               break; // B        // uncomment this block for keypad4x4
               }
      case  215: key_byt = 7; break; // 7
      case 219: key_byt = 8; break; // 8
      case 221: key_byt = 9; break; // 9
      case 222: {
                key_byt = 67;
                key1=0;
                Lcd_Out(1,1,"Press Program No.");
                break;
                } // C
      case 231: {
               switch (col_type) {
               case 1:{
                    re--;
                    if (re==255) re=0;
                    break;
               }
               case 2:{
                    gr--;
                    if (gr==255) gr=0;
                    break;
               }
               case 3:{
                    bl--;
                    if (bl==255) bl=0;
                    break;
               }
               }
               col_print();
               key_byt = 42;
               break; // *
               }
      case 235: key_byt = 0; break; // 0
      case 137: {
               switch (col_type) {
               case 1:{
                    re++;
                    if (re>=32) re=31;
                    break;
               }
               case 2:{
                    gr++;
                    if (gr>=32) gr=31;
                    break;
               }
               case 3:{
                    bl++;
                    if (bl>=32) bl=31;
                    break;
               }
               }
               col_print();
               
               key_byt = 35;
               break; // #
               }
      case 238: {
               col_type++;
               if (col_type==4) col_type=1;
               col_print();
               key_byt = 68;
               break; // D
               }
      }
        if ((key_byt>=0) && (key_byt<=9))
        {
         if (key1>=10) key1=key1 % 10;
         key1=(key1 * 10) + key_byt;
         if (slave_change_flag==0) {
         if (key1>=100) key1=0;
        Lcd_Out(1,1,"Now Change to");
        ByteToStr(key1,txt);
        Lcd_Out(1,14,txt);
        } else {
//               slave_no=key1;/// slave change
        }
         }
//      keyl1=0;
     }

  TMR0L  = 0xd0;
//  TMR0L  = 0x0;
  INTCON.T0IF = 0;       // Set T0IE, clear T0IF*/
}//~

void main() {
main_init();
  INTCON = 0xA0;       // Enable TMRO interrupt
  do {
  asm {
  clrwdt;
  }
  keytemp=Keypad();
  if (keytemp!=255)
  {
//  keytemp=1;
   keyl1=1;
   key_byt=ret_no;
   //ret_no=255;
  }

  } while(1);          // endless loop
}//~!

[rezer]

hi Aoday,

Is your code working fine now?
I have the same problem too. My DS1307 RTC with soft I2C stop working after I use Mmc_Fat_Assign.
I don't know it's a bug or not. I use mikrobasic.

[Aoday]

I built my own soft I2C and its working very nice and faster if you want i can send it to u

[rezer]

I really need your help. Please send it to my PM.

Thanks in advance

[Aoday]

the bellow functions using port A as follows
RA0 Data
RA1 clock

Code: Select all

void Soft_s_I2C_Start(){
    PORTA.f0=1;
    PORTA.f1=1;
    Delay_10us();
    PORTA.f0=0;
    Delay_1us();
    Delay_1us();
    PORTA.f1=0;
}//~

void Soft_s_I2C_Write(char b){
     char temp_count=0;
     for (temp_count=0;temp_count<8;temp_count++){
     PORTA.f0=b.f7;
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
     b=b<<1;
     PORTA.f1=0;
    Delay_1us();
     }
     TRISA.f0=1;
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
//    Delay_10us();
    Delay_1us();
    Delay_1us();
    Delay_1us();
     PORTA.f1=0;
     TRISA.f0=0;

}//~

char Soft_s_I2C_Read(char b){
     char temp_count=0,temp_da=0;
     TRISA.f0=1;
     for (temp_count=0;temp_count<8;temp_count++){
         temp_da=temp_da<<1;
         temp_da.f0=PORTA.f0;
         Delay_1us();
         PORTA.f1=1;
//         Delay_10us();
         PORTA.f1=0;
         Delay_1us();
     }
     TRISA.f0=0;
     PORTA.f0=~(b.f0);
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
//    Delay_10us();
    Delay_1us();
    Delay_1us();
    Delay_1us();
     PORTA.f1=0;
     return(temp_da);
}//~

void Soft_s_I2C_Stop() {
    PORTA.f0=0;
    PORTA.f1=1;
    Delay_10us();
    PORTA.f0=1;
}//~

and you must put the following instructions in initializing

Code: Select all

  ADCON1=7;
  TRISA = 0;           // PORTA is output

and bellow the example program how to read the time

Code: Select all

unsigned char sec, mnt, hr, day, mn, year;
char *txt, tnum[4];
void Soft_s_I2C_Start(){
    PORTA.f0=1;
    PORTA.f1=1;
    Delay_10us();
    PORTA.f0=0;
    Delay_1us();
    Delay_1us();
    PORTA.f1=0;
}//~

void Soft_s_I2C_Write(char b){
     char temp_count=0;
     for (temp_count=0;temp_count<8;temp_count++){
     PORTA.f0=b.f7;
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
     b=b<<1;
     PORTA.f1=0;
    Delay_1us();
     }
     TRISA.f0=1;
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
//    Delay_10us();
    Delay_1us();
    Delay_1us();
    Delay_1us();
     PORTA.f1=0;
     TRISA.f0=0;

}//~

char Soft_s_I2C_Read(char b){
     char temp_count=0,temp_da=0;
     TRISA.f0=1;
     for (temp_count=0;temp_count<8;temp_count++){
         temp_da=temp_da<<1;
         temp_da.f0=PORTA.f0;
         Delay_1us();
         PORTA.f1=1;
//         Delay_10us();
         PORTA.f1=0;
         Delay_1us();
     }
     TRISA.f0=0;
     PORTA.f0=~(b.f0);
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
//    Delay_10us();
    Delay_1us();
    Delay_1us();
    Delay_1us();
     PORTA.f1=0;
     return(temp_da);
}//~

void Soft_s_I2C_Stop() {
    PORTA.f0=0;
    PORTA.f1=1;
    Delay_10us();
    PORTA.f0=1;
}//~
char *R_Trim(char *str1){

  while (*str1 == ' ')
    str1++;
  return str1;
}//~

void Zero_Fill(char *value) {                      // fill text repesentation
  if (value[1] == 0) {                             //      with leading zero
    value[1] = value[0];
    value[0] = 48;
    value[2] = 0;
  }
}//~

//--------------------- Reads time and date information from RTC (PCF8583)
void Read_Time(char *sec, char *mnt, char *hr, char *day, char *mn, char *year) {
  Soft_s_I2C_Start();
  Soft_s_I2C_Write(0xd0);
  Soft_s_I2C_Write(0);
  Soft_s_I2C_Start();
  Soft_s_I2C_Write(0xd1);
  *sec = Soft_s_I2C_Read(1) & 127;
  *mnt = Soft_s_I2C_Read(1) & 127;
  *hr = Soft_s_I2C_Read(1) & 63;
  *day = Soft_s_I2C_Read(1) & 63;
   Soft_s_I2C_Read(1) & 63;
  *mn = Soft_s_I2C_Read(1) & 31;
  *year = Soft_s_I2C_Read(0);
  Soft_s_I2C_Stop();
}//~

//-------------------- Formats date and time
void Transform_Time(char  *sec, char *mnt, char *hr, char *day, char *mn, char *year) {
  *sec  =  ((*sec & 0xF0) >> 4)*10 + (*sec & 0x0F);
  *mnt  =  ((*mnt & 0xF0) >> 4)*10 + (*mnt & 0x0F);
  *hr   =  ((*hr & 0xF0) >> 4)*10 + (*hr & 0x0F);
  *year =  ((*year & 0xF0) >> 4)*10 + (*year & 0x0F);
  *day  =  ((*day & 0xf0) >> 4)*10 + (*day & 0x0F);
  *mn   =  ((*mn & 0xf0) >> 4)*10 + (*mn & 0x0F);
}//~

//-------------------- Output values to LCD
void Display_Time(char sec, char mnt, char hr, char day, char mn, char year) {
  char *tc;
  
   ByteToStr(day, tnum);                           // day
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(1,6, tc);
   ByteToStr(mn, tnum);                            // month
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(1,9, tc);
   ByteToStr(year, tnum);                            // month
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(1,14, tc);
//   LCD_Chr(1,15,52+year);                          // year
   ByteToStr(hr,tnum);                             // hour
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(2,6,tc);
   ByteToStr(mnt,tnum);                            // minute
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(2,9,tc);
   ByteToStr(sec,tnum);                            // seconds
   tc = R_Trim(tnum);
   Zero_Fill(tc);
   LCD_Out(2,12,tc);
}//~

//------------------ Performs project-wide init
void Init_Main() {
Delay_100ms();
  LCD_Init(&PORTb);                                // initialize LCD on portd
Delay_8ms();
 ADCON1=7;

  Soft_I2C_Config(&PORTA, 0,1);                  // initialize I2C
//  Soft_I2C_Init(&PORTC);

  txt = "Date:";                                   // prepare and output static text on LCD
  LCD_Out(1,1,txt);
  LCD_Chr(1,8,':');
  LCD_Chr(1,11,':');
  txt = "Time:";
  LCD_Out(2,1,txt);
  LCD_Chr(2,8,':');
  LCD_Chr(2,11,':');
  txt = "20";
  LCD_Out(1,12,txt);
  LCD_Cmd(LCD_CURSOR_OFF);                         // cursor off
  Soft_s_I2C_Start();
  Soft_I2C_Write(0xd0);
  Soft_I2C_Write(0x0);
  Soft_I2C_Write(0x59);
  Soft_s_I2C_Stop();
}//~

//----------------- Main procedure
void main() {
  Init_Main();                                     // perform initialization
  while (1) {
//  Soft_s_I2C_Write(0x55);
//  Delay_8ms();
    Read_Time(&sec,&mnt,&hr,&day,&mn,&year);       // read time from RTC(PCF8583)
    Transform_Time(&sec,&mnt,&hr,&day,&mn,&year);  // format date and time
    Display_Time(sec, mnt, hr, day, mn, year);     // prepare and display on LCD
//    Delay_ms(1000);                                // wait 1s
/*    Delay_ms(10000);                                // wait 1s
    Delay_ms(10000);                                // wait 1s
    Delay_ms(10000);                                // wait 1s
    Delay_ms(10000);                                // wait 1s
    Delay_ms(10000);                                // wait 1s
    Delay_ms(10000);                        */        // wait 1s
  }
}

bellow example program for set the time

Code: Select all

void Soft_s_I2C_Start(){
    PORTA.f0=1;
    PORTA.f1=1;
    Delay_10us();
    PORTA.f0=0;
    Delay_1us();
    Delay_1us();
    PORTA.f1=0;
}//~

void Soft_s_I2C_Write(char b){
     char temp_count=0;
     for (temp_count=0;temp_count<8;temp_count++){
     PORTA.f0=b.f7;
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
     b=b<<1;
     PORTA.f1=0;
    Delay_1us();
     }
     TRISA.f0=1;
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
//    Delay_10us();
    Delay_1us();
    Delay_1us();
    Delay_1us();
     PORTA.f1=0;
     TRISA.f0=0;

}//~

char Soft_s_I2C_Read(char b){
     char temp_count=0,temp_da=0;
     TRISA.f0=1;
     for (temp_count=0;temp_count<8;temp_count++){
         temp_da=temp_da<<1;
         temp_da.f0=PORTA.f0;
         Delay_1us();
         PORTA.f1=1;
//         Delay_10us();
         PORTA.f1=0;
         Delay_1us();
     }
     TRISA.f0=0;
     PORTA.f0=~(b.f0);
    Delay_1us();
     PORTA.f1=1;
//    Delay_10us();
//    Delay_10us();
    Delay_1us();
    Delay_1us();
    Delay_1us();
     PORTA.f1=0;
     return(temp_da);
}//~

void Soft_s_I2C_Stop() {
    PORTA.f0=0;
    PORTA.f1=1;
    Delay_10us();
    PORTA.f0=1;
}//~
void main() {
ADCON1=6;
//   Soft_I2C_Config(&PORTA, 0,1); // initialize full master mode
   TRISA=0x0;
//   while (1) {
//Soft_s_I2C_Write(0x55);
//PORTA.f1=1;
//Delay_8ms();
//PORTA.f1=0;

//   }
//   Soft_I2C_Init(&PORTD);
   Soft_s_I2C_Start();             // issue start signal
   Soft_s_I2C_Write(0xd0);         // address PCF8583
   Soft_s_I2C_Write(0);            // start from word at address 0 (configuration word)
   Soft_s_I2C_Write(0x20);         // write $80 to config. (pause counter...)
   Soft_s_I2C_Stop();              // issue stop signal
   Soft_s_I2C_Start();             // issue start signal
   Soft_s_I2C_Write(0xd0);         // address PCF8583
   Soft_s_I2C_Write(0);            // start from word at address 0 (configuration word)
   Soft_s_I2C_Write(0);            // write 0 to seconds word
   Soft_s_I2C_Write(0x08);         // write $30 to minutes word
   Soft_s_I2C_Write(0x17);         // write $11 to hours word
   Soft_s_I2C_Write(0x22);         // write $30 to year/date word
   Soft_s_I2C_Write(0x21);         // write $08 to weekday/month
   Soft_s_I2C_Write(0x03);         // write $08 to weekday/month
   Soft_s_I2C_Write(0x08);         // write $08 to weekday/month
   Soft_s_I2C_Stop();              // issue stop signal

   Soft_s_I2C_Start();             // issue start signal
   Soft_s_I2C_Write(0xd1);         // address PCF8530
   Soft_s_I2C_Write(0);            // start from word at address 0
   Soft_s_I2C_Write(0);            // write 0 to config word (enable counting)
   Soft_s_I2C_Stop();              // issue stop signal

}//~!

[rezer]

Thanks for your help, Aoday.

I will try it.

[radiofm]

Hi

Thanks for your i2c soft !
there is something wrong with soft i2c in mikroC ver 8.1 !!!

[OldSpring]

I'm doing a project that is same with Aoday's project.
I am using MikroBasic 6.0 and got same problem with Aoday.
(My project is using Pic18f452 8MHz, 16x2 LCD 4 bits, DS1307 soft i2c, and MMC spi, got wrong time and date data from DS1307, LCD Show: Time = 3?:7?:7?, Date: = 1?-??-??)

I'm looking for a good way to solve it.
Thanks for your code, Aoday's

ME team should know how to solve it.

[keanhee]

Hi

Thanks for your i2c soft !
there is something wrong with soft i2c in mikroC ver 8.1 !!!

any ME team care to comment on the issue reported?

[milan]

Hi,

I apologize for a late response.

first code posted by Aoday has 2 problems:
1) interrupt routine contains time-consuming code. This is just warning.
2) Software I2C Library can't be used together with interrupts.
Help -> Software I2C Library:
Note: This library implements time-based activities, so interrupts need to be disabled when using Soft I²C.

Simply, if you use Delays for some code - then interrupts will corrupt them.

Hi

Thanks for your i2c soft !
there is something wrong with soft i2c in mikroC ver 8.1 !!!

We tested Software I2C Library many times and we found no errors.
Please provide us with example code that shows problem and we will examine it.

You should note that Aoday's library is tested without using interrupts,
our Library works fine under the same circumstances.

Also, our Library can use any pair of MCU pins,
see Soft_I2C_Config explanation in Help.


All of these facts are same for mikroBasic.

Once again Software I2C Library passed our tests, but if you find some problem,
provide us with example code and we will be happy to solve it.

[radiofm]

We tested Software I2C Library many times and we found no errors.
Please provide us with example code that shows problem and we will examine it.

hello.

1. i sent to ME my program via support desk
2. In my program first starting soft i2c and next after that i enable interrupts.
also before soft i2c i disable ALL interrupts.

3. with Aoday i2c soft routine my program working perfectly but with i2c soft library form mikroC unfortunetly not.

Best Regards

Robert

[Jonny]

Hello, we are getting the same problems with Soft_I2C.
Where Soft_I2C works fine until we use interrupts anywhere in the program.
If we disable interrupts INTCON.GIE = 0; before calling the Soft_ functions
They should work ??? But do not.

[radiofm]

HI

try with this (from AODAY example)

you must only do some modifications in code - changing PINS

for example my working sample of code

Code: Select all

//first define sda and scl
#define soft_SDA   PORTD.F2
#define soft_SCL   PORTD.F3

#define trisd_SDA TRISD.F2
#define trisd_SCL TRISD.F3


//functions

 void Soft_s_I2C_Start(){
    soft_SDA=1;
    soft_SCL=1;
    Delay_10us();
    soft_SDA=0;
    Delay_1us();
    Delay_1us();
    soft_SCL=0;
}//~

void Soft_s_I2C_Write(char b){
     char temp_count=0;
     for (temp_count=0;temp_count<8;temp_count++){
     soft_SDA=b.f7;
    Delay_1us();
     soft_SCL=1;
//    Delay_10us();
     b=b<<1;
     soft_SCL=0;
    Delay_1us();
     }
     trisd_SCL=1;
    Delay_1us();
     soft_SCL=1;
//    Delay_10us();
//    Delay_10us();
    Delay_1us();
    Delay_1us();
    Delay_1us();
     soft_SCL=0;
     trisd_SDA=0;

}//~

char Soft_s_I2C_Read(char b){
     char temp_count=0,temp_da=0;
     trisd_SDA=1;
     for (temp_count=0;temp_count<8;temp_count++){
         temp_da=temp_da<<1;
         temp_da.f0=soft_SDA;
         Delay_1us();
         soft_SCL=1;
//         Delay_10us();
         soft_SCL=0;
         Delay_1us();
     }
     trisd_SDA=0;
     soft_SDA=~(b.f0);
     Delay_1us();
     soft_SCL=1;
//    Delay_10us();
//    Delay_10us();
     Delay_1us();
     Delay_1us();
     Delay_1us();
     soft_SCL=0;
     return(temp_da);
}//~

void Soft_s_I2C_Stop() {
    soft_SDA=0;
    soft_SCL=1;
    Delay_10us();
    soft_SDA=1;
}//~



// sample working i2c code:


void    main()
        {
.......
.......
.......
.......

//start ds1882

  Soft_s_I2C_Start();
  Soft_s_I2C_Write(0x50); //adres
  Soft_s_I2C_Write(0x45); //01
   delay_ms(70);
  Soft_s_I2C_Write(0x05); //00
   delay_ms(70);
  Soft_s_I2C_Write(0x87); //reg
  Soft_s_I2C_Stop();

.....
......

}