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8-bit wav file player with Xmodem RS-232 for 16F873

 
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yerpa



Joined: 19 Feb 2004
Posts: 58
Location: Wisconsin

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8-bit wav file player with Xmodem RS-232 for 16F873
PostPosted: Fri Jan 19, 2007 3:51 pm     Reply with quote

Here it is, offered strictly as-is. Please do not make fun of my nasty coding style! Note that this is a re-post - I forgot to disable HTML last time around.

Code:

/////////////////////////////////////////////////////////////////////////
////  T2K2v2.C  by RPL   15 OCT 2002                                 ////
////  Program for TONE2002 board, with audio playback, xmodem file   ////
////  transfers, and a simple file system.                           ////
////                                                                 ////
/////////////////////////////////////////////////////////////////////////

#include <16f873.h>
#fuses HS, NOWDT, PUT, NOBROWNOUT, NOPROTECT, NOWRT, NOLVP
#use fast_io(A)

/*  DEFINE EQUATES FOR PORTS */

#byte PORTA = 5
#byte PORTB = 6
#byte RTCC  = 1
#byte TMR0  = 0x01   //Timer 0.
#byte TMR1L = 0x0E   //Timer 1 LOW BYTE.

#define EEPROM_SELECT PIN_A2
#define EEPROM_DI     PIN_A0
#define EEPROM_DO     PIN_A4
#define EEPROM_CLK    PIN_A1

#define ACK 0x06
#define CAN 0x18
#define DLE 0x10
#define EOT 0x04
#define NAK 0x15
#define SOH 0x01
#define SYN 0x22
#define XOF 0x13
#define XON 0x11

#define EEPROM_ADDRESS byte
#define EEPROM_SIZE    256

#use delay(Clock=18432000, RESTART_WDT)
#use RS232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

void clr_all_ptrs();
void dir();
byte read_AT45_stat();
void write_AT45_stream128(long page, byte addr2);
void read_AT45_stream128(long page, byte addr2);
void read_AT45_stream64(long page, byte addr2);
byte xmodem();
void hexdump();

// Define static variables...

static byte toggle_lo;
static byte toggle_hi;
static byte softime;
static byte sample;
static byte sptr;
static byte pflag;
static byte sflag;
static byte filenum;
static long file_start;
static long file_end;
static byte rambuf1[64];
static byte rambuf2[64];


// Define constants...

byte const hexlist[16]={'0', '1', '2', '3', '4', '5', '6', '7',
                        '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

   // INTERRUPT ROUTINE FOR RTCC...

#INT_RTCC
void time0_handler(void)
{
        #asm
sync:   btfss 1, 3               //Synchronize (de-jitter) the samples.
        goto  sync
        btfss 1, 0
        nop
        #endasm
       
   PORTB=sample;                 // Write sample to DAC.
   RTCC=0x4f;
   sptr++;
   if ((sptr & 0x40)!=0) sample = rambuf2[sptr & 0x3f];
   if ((sptr & 0x40)==0) sample = rambuf1[sptr & 0x3f];
   if ((sptr & 0x3f)==0) sflag=0;
   if (pflag==0) sample=0;
   toggle_lo++;
   if (toggle_lo==0)
   {
     toggle_hi++;
     softime++;
   }
     if (toggle_hi & 0x10)
     {
        output_low(PIN_A3);        // Toggle on-board LED.
     }
     if (!(toggle_hi & 0x10))
     {
        output_high(PIN_A3);
     }
   
}


main()
{
   byte ch, i, temp;
   byte ebyte;
   long page;
   filenum=0;
   SET_RTCC(0);   
   setup_timer_1(T1_INTERNAL);          //Free-running.
   setup_timer_2(T2_DIV_BY_1, 0x1F, 1); //Not really used.
   
   
   SETUP_CCP1(CCP_OFF);
   SETUP_CCP2(CCP_OFF);
//   SETUP_COUNTERS(RTCC_INTERNAL, WDT_18MS);
   SETUP_COUNTERS(RTCC_INTERNAL, RTCC_DIV_2);
   SETUP_PORT_A(NO_ANALOGS);
   SET_TRIS_A(0x10);                    //Port A0-A3, A5-A7=outputs,
                                        //Port A4=input.
   SET_TRIS_B(0x00);                    //Port B0-B7=outputs.
   ENABLE_INTERRUPTS(RTCC_ZERO);
//   ENABLE_INTERRUPTS(INT_TIMER1);
   SETUP_TIMER_1(T1_INTERNAL | T1_DIV_BY_8);
   SET_TIMER1(0x3F);
   ENABLE_INTERRUPTS(GLOBAL);
   PORTB=0;
   pflag=0;
   putc(XON);
   printf ("\r\n T2Kv2 \r\n");
top:
   printf ("\r\nS=Status, X=Xmodem transfer, H=Hexdump, P=Play.\r\n");
   printf ("C=Clear all, D=Directory.\r\n\r\n>");
   ch=getc();
   if ((ch=='S') || (ch=='s'))
   {
      printf ("\r\nreading Status...\r\n");
      ebyte = read_AT45_stat();     
      printf ("\r\nStatus=");
      if (ebyte & 0x80) putc (0x31);
      if (!(ebyte & 0x80)) putc (0x30);
      if (ebyte & 0x40) putc (0x31);
      if (!(ebyte & 0x40)) putc (0x30);
      if (ebyte & 0x20) putc (0x31);
      if (!(ebyte & 0x20)) putc (0x30);
      if (ebyte & 0x10) putc (0x31);
      if (!(ebyte & 0x10)) putc (0x30);
      putc (0x020);
      if (ebyte & 0x08) putc (0x31);
      if (!(ebyte & 0x08)) putc (0x30);
      if (ebyte & 0x04) putc (0x31);
      if (!(ebyte & 0x04)) putc (0x30);
      if (ebyte & 0x02) putc (0x31);
      if (!(ebyte & 0x02)) putc (0x30);
      if (ebyte & 0x01) putc (0x31);
      if (!(ebyte & 0x01)) putc (0x30);
   }

   if ((ch=='X') || (ch=='x'))
   { 
      ch=0;
      read_AT45_stream64(0, 0);
      output_high(EEPROM_SELECT);
      file_end=0;
      for (filenum=0; filenum < 7; filenum++)
      {
        i=filenum*4;
        file_start = rambuf1[i];
        file_start <<= 8;
        file_start |= rambuf1[i+1];
        if (file_start==0) break;
        file_end = rambuf1[i+2];
        file_end <<= 8;
        file_end |= rambuf1[i+3];
      }
      file_start = file_end + 1;
      if (filenum>=6) break;
      i = 4 * filenum;
      printf ("\r\nStart xmodem file %d transfer now...\r\n", filenum);
      ebyte=xmodem();
      if (ebyte==0)
      {
         delay_ms(25);
         read_AT45_stream64(0, 0);
         rambuf1[i]=(file_start >> 8);
         rambuf1[i+1]=(file_start & 0xFF);
         rambuf1[i+2]=(file_end >> 8);
         rambuf1[i+3]=(file_end & 0xFF);
         delay_ms(25);
         write_AT45_stream128(0, 0);
         output_high(EEPROM_SELECT);
         printf ("\r\nTransfer Complete!\r\n");
      }
      if (ebyte==1) printf ("\r\nTransfer Failed!\r\n");
   }

   if ((ch=='H') || (ch=='h')) hexdump();

   if ((ch=='C') || (ch=='c'))
   {
     clr_all_ptrs();
     printf ("\r\nDone.\r\n");
   }

   if ((ch=='D') || (ch=='d')) dir();

   if ((ch=='P') || (ch=='p'))             // PLAY loop is here.
   {
      ch=0;
      while ((ch < 0x30) || (ch > 0x35))
      {
        printf ("\r\nPick a file number to play (0-5):\r\n");
        ch=getc();
      }
      i=ch-0x30;
      i=4*i;
      disable_interrupts(global);
      read_AT45_stream64(0,0);        //Get directory.
      file_start=rambuf1[i];
      file_start <<= 8;
      file_start |= rambuf1[i+1];
      file_end=rambuf1[i+2];
      file_end <<= 8;
      file_end |= rambuf1[i+3];
      page=file_start;
      if (page==0) break;             //If no sample saved, quit.
      temp=0;
      sptr=0;
      read_AT45_stream64(page,temp);  //Pre-fill rambuf1[]
      temp=1;
      read_AT45_stream64(page,temp);  //Pre-fill rambuf2[]
      sflag=1;
      pflag=1;
      enable_interrupts(global);

      while ((kbhit()==FALSE) && (page <= file_end))
      {
         if (sflag==0)
         {
            temp++;
            temp &= 0x03;
            if ((temp & 0x03)==0) page++;
            read_AT45_stream64(page,temp); // Keep buffer loaded with samples.
            sflag=1;
         }
      }
      pflag=0;
   }
   output_low(PIN_A5);     //o-scope diagnostic
   output_high(PIN_A5);
   goto top;
}


// Read AT45DB041B status byte.  By RPL.

byte read_AT45_stat() {

   byte cmd;
   byte i,data;

   cmd=0xD7;

   output_low(EEPROM_SELECT);
   for(i=8;i>0;i--)
   {
      output_bit(EEPROM_DI, shift_left(&cmd,1,0));
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);
   }
   for(i=8;i>0;i--)
   {
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);       
      shift_left(&data,1,input(EEPROM_DO));
   }
   output_high(EEPROM_SELECT);
   return(data);
}

// Main mem page 128-byte write thru buffer #1 on AT45DB041B chip. By RPL.
// Call with page address (=0-2047) and addr2 (=0 or 1).  If addr2==0,
// data is written from rambuf1[] & rambuf2[] to the 1st (128) bytes
// of selected page, but the chip select is not raised at the end, so
// the write operation is not completed.  When addr2==1, data is
// written to 2nd (128) bytes of selected page, followed by raising
// the chip select to finish the operation.  Warning: Don't do any other
// chip operations after a call with addr2==0.  That operation doesn't
// end until a call with addr2==1.

void write_AT45_stream128(long page, byte addr2)
{

   byte cmd;
   byte i, j;

   cmd=0x82;

   output_low(EEPROM_SELECT);
   
   if (addr2==0)
   {
     for(i=8;i>0;i--)            // Write command = 0x82 to mem chip.
     {
        output_bit(EEPROM_DI, shift_left(&cmd,1,0));
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);
     }
     for(i=4;i>0;i--)            // Load (4) "0" (reserved) page bits.
     {
        output_bit(EEPROM_DI, 0);
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);
     }
     for(i=5;i>0;i--)            // Line up page bit P10
     {
        shift_left(&page,2,0);
     }
     for(i=12;i>0;i--)           // Load page bits P10-P0 & byte addr
                                 // bit B8. Note B8=0.
     {
        output_bit(EEPROM_DI, shift_left(&page,2,0));
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);
     }
     for(i=8;i>0;i--)              // Load byte addr bits B7-B0=0.
     {
        output_bit(EEPROM_DI, 0);
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);   
     }
   }
   
   for(j=0;j<64;j++)       // Write 64 bytes of rambuf1[] to mem. chip.
   {
      cmd=rambuf1[j];
      for(i=8;i>0;i--)
      {
        output_bit(EEPROM_DI, shift_left(&cmd,1,0));
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);
      }
   }
   for(j=0;j<64;j++)       // Write 64 bytes of rambuf2[] to mem. chip.
   {
      cmd=rambuf2[j];
      for(i=8;i>0;i--)
      {
        output_bit(EEPROM_DI, shift_left(&cmd,1,0));
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);
      }
   }
   if (addr2 !=0) output_high(EEPROM_SELECT);
   return;
}
// Continuous 128-byte array read from AT45DB041B chip. By RPL.
// Call with page address (0-2047) and addr2 (0 or 1).  If addr2==0,
// data is read from the 1st (128) bytes of page and written into
// rambuff1[] & rambuff2[]. If addr2 != 0, data is read from 2nd (128)
// bytes of selected page...

void read_AT45_stream128(long page, byte addr2)
{
   byte cmd;
   byte i, j;

   cmd=0x68;

   output_low(EEPROM_SELECT);
   for(i=8;i!=0;i--)            // Send command to mem chip.
   {
      output_bit(EEPROM_DI, shift_left(&cmd,1,0));
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);
   }
   cmd=0;
   for(i=4;i!=0;i--)            // Load (4) "0" (reserved) page bits.
   {
      output_bit(EEPROM_DI, 0);
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);
   }
   for(i=5;i!=0;i--)            // Line up page bit P10
   {
      shift_left(&page,2,0);
   }
   for(i=12;i!=0;i--)            // Load page bits P10-P0 & byte addr
                                // bit B8. Note B8=0.
   {
      output_bit(EEPROM_DI, shift_left(&page,2,0));
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);
   }
   cmd=0;
   if (addr2 !=0) cmd = 0x80;
   for(i=8;i!=0;i--)              // Load byte addr bits B7-B0.
   {
      output_bit(EEPROM_DI, shift_left(&cmd,1,0));
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);   
   }
   cmd=0;
   for(i=32;i!=0;i--)              // Load (32) "don't care" bits.
   {
      output_bit(EEPROM_DI, 0);
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);   
   }
   for(j=0;j<64;j++)             // Read 64 bytes into rambuf1[].
   {
      for(i=8;i!=0;i--)
      {
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);       
        shift_left(&rambuf1[j],1,input(EEPROM_DO));
      }
   }
   for(j=0;j<64;j++)             // Read 64 bytes into rambuf2[].
   {
      for(i=8;i!=0;i--)
      {
        output_high(EEPROM_CLK);
        output_low(EEPROM_CLK);       
        shift_left(&rambuf2[j],1,input(EEPROM_DO));
      }
   }
   output_high(EEPROM_SELECT);
   return;
}

// Continuous 64-byte array read from AT45DB041B chip. By RPL.
// Call with page address (0-2047) and addr2.  If if lo nibble of
// addr2==0, data is read from the 1st (64) bytes of page into rambuf1[].
// If lo nib of addr2==1, data is read from 2nd (64) bytes of page into
// rambuf2[]. If lo nib==2, data read from 3rd (64) bytes of page into
// rambuf1[].  If lo nib==3, data from 4th (64) bytes of page into
// rambuf2[]. If addr2 has hi bit set, data is read into rambuf2[]...

void read_AT45_stream64(long page, byte addr2)
{
   byte cmd;
   byte i, j;

   cmd=0x68;

   output_low(EEPROM_SELECT);
   for(i=8;i!=0;i--)            // Send command to mem chip.
   {
      output_bit(EEPROM_DI, shift_left(&cmd,1,0));
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);
   }
   output_bit(EEPROM_DI, 0);   
   for(i=4;i!=0;i--)            // Load (4) "0" (reserved) page bits.
   {
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);
   }
   for(i=5;i!=0;i--)            // Line up page bit P10
   {
      shift_left(&page,2,0);
   }
   for(i=12;i!=0;i--)            // Load page bits P10-P0 & byte addr
                                // bit B8. Note B8=0.
   {
      output_bit(EEPROM_DI, shift_left(&page,2,0));
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);
   }

   if ((addr2 & 0x0f)==0) cmd=0;
   if ((addr2 & 0x0f)==1) cmd=0x40;
   if ((addr2 & 0x0f)==2) cmd=0x80;
   if ((addr2 & 0x0f)==3) cmd=0xC0;

   for(i=8;i!=0;i--)              // Load byte addr bits B7-B0.
   {
      output_bit(EEPROM_DI, shift_left(&cmd,1,0));
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);   
   }
   output_bit(EEPROM_DI, 0);
   for(i=32;i!=0;i--)              // Load (32) "don't care" bits.
   {
      output_high(EEPROM_CLK);
      output_low(EEPROM_CLK);   
   }
   if ((addr2==0)||(addr2==2))     // Use rambuf1[]?
   {
     for(j=0;j<64;j++)             // Read 64 bytes into rambuf1[].
     {
        for(i=8;i!=0;i--)
        {
          output_high(EEPROM_CLK);
          output_low(EEPROM_CLK);       
          shift_left(&rambuf1[j],1,input(EEPROM_DO));
        }
     }
   }
   if ((addr2==1)||(addr2==3))     // Use rambuf2[]?
   {
     for(j=0;j<64;j++)             // Read 64 bytes into rambuf2[].
     {
        for(i=8;i!=0;i--)
        {
          output_high(EEPROM_CLK);
          output_low(EEPROM_CLK);       
          shift_left(&rambuf2[j],1,input(EEPROM_DO));
        }
     }
   }
   output_high(EEPROM_SELECT);
}



// This subroutine runs the upload (receive) part of the xmodem protocol...

byte xmodem()
{
   byte i, j, k, seq, csum;
   long page;
   seq=0;
   k=0;
   csum=0;
   softime=0;
   page=file_start;
   putc(NAK);               //Initiate communication by sending NAKs.
   while (kbhit()==FALSE)
   {
     if (softime >= 0xf0)
     {
       softime=0;
       putc(NAK);
     }
   }
   while(1)
   {
      i=getc();
      while (i!=SOH)
      {
         i=getc();
         if (i==EOT)
         {
            putc(ACK);       //ACK the EOT. Transfer complete.
            putc(ACK);
            output_high(EEPROM_SELECT); // In case last packet was even #.
            file_end=page;
            return(0);
         }
         if (i==CAN) return(1);
      }
      seq=getc(); //Get packet sequence #.
      seq=getc(); //Get complemented packet sequence #.
      for (i=0;i<128;i++)
      {
         j=getc();
         if (i<64)  rambuf1[i]=j;
         if (i>=64) rambuf2[i-64]=j;
      }
      csum=getc();     //Get checksum.
      write_AT45_stream128(page, k);
      delay_ms(25);
      k++;
      k &= 0x01;     
      if (k==0) page++;
      putc(ACK);       //ACK the packet.
   }
   return(1);
}


void hexdump()
{
   long page;
   byte addr2, i, j, k, m, ch;
   page=0;
   addr2=0;
   putc(0x0d);
   putc(0x0a);
   k=0;
   ch=0;
   while ((ch != 'Q') && (ch != 'q'))
   {
     read_AT45_stream128(page, addr2);
     j=0;
     while (j < 8)
     {
       m=k;
       if (addr2 != 0) m=k+0x80;
       printf ("%4lx-%2x", page, m);   
       putc(':');
       for(i=0;i<16;i++)  // Display in hex.
       {
          ch=rambuf1[k];
          if (j >=4) ch=rambuf2[k-64];
          ch >>= 4;
          ch &= 0x0f;
          putc(hexlist[ch]);
          ch=rambuf1[k];
          if (j >=4) ch=rambuf2[k-64];
          ch &= 0x0f;
          putc(hexlist[ch]);
          putc(0x20);
          if (i==7) putc(0x20);
          k++;
       }
       for(i=0;i<5;i++) putc(0x20);
       k-=16;
       for(i=0;i<16;i++)   // Display in ASCII.
       {
          ch=rambuf1[k];
          if (j >=4) ch=rambuf2[k-64];
          if (ch < 0x20) ch='.';
          if (ch > 0x7e) ch='.';
          putc(ch);
          k++;
       }
       putc(0x0d);
       putc(0x0a);
       j++;
     }
     printf ("\n\r\M=More, N=skip 100 pages, S=Skip 10 pages, Q=Quit:\r\n");
     ch=getc();
     k=0;
     addr2++;
     addr2 &= 0x01;
     if (addr2==0) page++;
     if ((ch=='N') || (ch=='n'))
     {
        page+=100;
        addr2=0;
     }
     if ((ch=='S') || (ch=='s'))
     {
        page+=10;
        addr2=0;
     }
   }
}

// This subroutine clears the 1st page of the AT45DB041B chip.
// The 1st page is used in this app to hold file pointers & file info.

void clr_all_ptrs()
{
   byte i;
   long j;
   for (i=0; i < 64; i++)
   {
     rambuf1[i]=0;
     rambuf2[i]=0;
   }
   write_AT45_stream128(0, 0);   // Clear page 0 (the directory).
   write_AT45_stream128(0, 1);
   delay_ms(25);

//   for (j=0; j<2048; j++)
//   {
//     write_AT45_stream128(j, 0);
//     write_AT45_stream128(j, 1);
//     delay_ms(25);
//   }

}


// This function displays a simple directory listing.

void dir()
{
   byte i, k;
   read_AT45_stream128(0, 0);
   for (i=0; i<6; i++)
   {
     k=4*i;
     printf ("\r\nFile %d: Start page %2x%2x", i, rambuf1[k], rambuf1[k+1]);
     printf ("   End page %2x%2x", rambuf1[k+2], rambuf1[k+3]);
   }
}


Last edited by yerpa on Sun Jan 21, 2007 12:34 pm; edited 1 time in total
Jackson.Calixto



Joined: 11 May 2007
Posts: 1

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TONE2002 board
PostPosted: Fri May 11, 2007 6:25 am     Reply with quote

Do you have the schema for this board?

Thank's
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