CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to support@ccsinfo.com
at45dbxxx

 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
mpardinho



Joined: 16 Jul 2008
Posts: 8
Location: Mexico

View user's profile Send private message

at45dbxxx
PostPosted: Fri Apr 27, 2012 8:01 am     Reply with quote
I can write and read buffer, but I can't read page.

Could anybody Point me in the right direction to get the data ?

Thank You
Code:

#define FLASH_SELECT PIN_C3   // 4
#define FLASH_CLOCK  PIN_C1   // 2
#define FLASH_DI     PIN_C0   // 1
#define FLASH_DO     PIN_C2   // 8

int16 QTDE_ROWS, QTDE_COLS;

byte ext_flash_readStatus();
void ext_flash_waitUntilReady();

byte ext_flash_getByte();
void ext_flash_sendData(int16 data, int8 size);
void ext_flash_sendBytes(byte* data, int16 size);

#define DTFSelect()\
        output_low(FLASH_SELECT);\
        delay_cycles(3)               // 300 ns PIC18F452 at 40Mhz

#define DTFUnSelect()\
        output_high(FLASH_SELECT);\
        delay_cycles(3)               // 300 ns PIC18F452 at 40Mhz

//------------------------------------------------------------------------------
void init_ext_flash() {
   int8 r;
   
   ext_flash_waitUntilReady();
   
   r = ext_flash_readStatus();   
   r = r & 0b00111000;
   r = r >> 3;   
     
   QTDE_ROWS = 0;
 
   switch (r) {
      case 1: QTDE_ROWS = 512;  QTDE_COLS = 256; break;
      case 2: QTDE_ROWS = 1024; QTDE_COLS = 256; break;
      case 3: QTDE_ROWS = 2048; QTDE_COLS = 256; break;
      case 4: QTDE_ROWS = 4096; QTDE_COLS = 256; break;
   }
}

//------------------------------------------------------------------------------
void ext_flash_waitUntilReady() {
   int8 i, r;
   
   DTFSelect();
   
   i = 20;

   do {
      ext_flash_sendData(0x57, 8);
      r = ext_flash_readStatus();
   } while (!(r & 0b10000000) && --i);

   DTFUnSelect();
}

//------------------------------------------------------------------------------
byte ext_flash_readStatus() {
   byte status;

   DTFSelect();

   ext_flash_sendData(0x57, 8);
   status = ext_flash_getByte();

   DTFUnSelect();
   
   return status;
}

//------------------------------------------------------------------------------
byte ext_flash_getByte() {
   byte flashData;
   int i;

   for (i = 0; i < 8; ++i) {   
      output_high(FLASH_CLOCK);
      shift_left(&flashData, 1, input(FLASH_DO));
      output_low(FLASH_CLOCK);
   }

   return flashData;
}

//------------------------------------------------------------------------------
void ext_flash_getBytes(byte* data, int16 size) {
   int16 i;
   signed int8 j;
     
   for (i = 0; i < size; ++i) {
      for (j = 0; j < 8; ++j) {
         output_high(FLASH_CLOCK);         
         shift_left(data + i, 1, input(FLASH_DO));         
         output_low(FLASH_CLOCK);
      }     
   }
}

//------------------------------------------------------------------------------
void ext_flash_readPage(int16 pageAddress, int16 pageIndex, byte* data, int16 size) {
   ext_flash_waitUntilReady();

   DTFSelect();

   ext_flash_sendData(0xD2, 8); // D2
   ext_flash_sendData(pageAddress, 15);
   ext_flash_sendData(pageIndex, 9);
   ext_flash_sendData(0, 32);
   
   ext_flash_getBytes(data, size);

   DTFUnSelect();
}

//------------------------------------------------------------------------------
#inline
void ext_flash_readBuffer(int1 bufferNumber, int16 bufferAddress, byte* data, int16 size) {
   byte opcode;
   
   DTFSelect(); // Enable select line
   
   if (bufferNumber)
      opcode = 0xD6; // Opcode for second buffer
   else
      opcode = 0xD4; // Opcode for first buffer
   
   opcode = 0xD4;
   
   ext_flash_sendData(opcode, 8); // Send opcode
   ext_flash_sendData(0, 15); // Send 15 don't care bits
   ext_flash_sendData(bufferAddress, 9); // Send buffer address
   ext_flash_sendData(0, 8); // Send 8 don't care bits
   ext_flash_getBytes(data, size); // Get data from the flash device
   
   DTFUnSelect(); // Disable select line
}

//------------------------------------------------------------------------------
void ext_flash_writeToBuffer(int1 bufferNumber, int16 bufferAddress, byte* data, int16 size) {
   byte opcode;
   
   DTFSelect(); // Enable select line
   
   if (bufferNumber)
      opcode = 0x87; // Opcode for second buffer
   else
      opcode = 0x84; // Opcode for first buffer     
 
   opcode = 0x84;
   
   ext_flash_sendData(opcode, 8); // Send opcode
   ext_flash_sendData(0, 15); // Send 15 don't care bits
   ext_flash_sendData(bufferAddress, 9); // Send buffer address
   ext_flash_sendBytes(data, size); // Write data to the buffer

   DTFUnSelect(); // Disable select line
}

//------------------------------------------------------------------------------
void ext_flash_BufferToPage(int1 bufferNumber, int16 pageAddress, int1 mode) {
   byte opcode;
   
   ext_flash_waitUntilReady(); // Wait until ready
   
   DTFSelect(); // Enable select line
   
   if (mode) {
      if (bufferNumber)
         opcode = 0x86; // Opcode for second buffer
      else
         opcode = 0x83; // Opcode for first buffer
   } else {
      if (bufferNumber)
         opcode = 0x89; // Opcode for second buffer
      else
         opcode = 0x88; // Opcode for first buffer
   }   
 
   opcode = 0x83;
   ext_flash_sendData(opcode, 8); // Send opcode
   ext_flash_sendData(pageAddress, 15); // Send page address
   ext_flash_sendData(0, 9); // Send 9 don't care bits
   
   DTFUnSelect(); // Disable select line
}

//------------------------------------------------------------------------------
void ext_flash_erasePage(int16 pageAddress) {
   ext_flash_waitUntilReady();

   DTFSelect(); // Enable select line

   ext_flash_sendData(0x81, 8); // Send opcode
   ext_flash_sendData(pageAddress, 15); // Send page address
   ext_flash_sendData(0, 9); // Send 9 don't care bits

   DTFUnSelect(); // Disable select line
}

//------------------------------------------------------------------------------
void ext_flash_eraseBlock(int8 blockAddress) {
   ext_flash_waitUntilReady();

   DTFSelect(); // Enable select line

   ext_flash_sendData(0x50, 8); // Send opcode
   ext_flash_sendData(blockAddress, 12); // Send block address
   ext_flash_sendData(0, 12); // Send 12 don't care bits

   DTFUnSelect(); // Disable select line
}

//------------------------------------------------------------------------------
void ext_flash_writePageThroughBuffer(int16 pageAddress, int1 bufferNumber, int16 bufferAddress, byte* data, int16 size) {
   byte opcode;
   
   ext_flash_waitUntilReady();

   DTFSelect(); // Enable select line
   
   if (bufferNumber)
      opcode = 0x85; // Opcode for second buffer
   else
      opcode = 0x82; // Opcode for first buffer
   
   opcode = 0x82;
   ext_flash_sendData(opcode, 8); // Send opcode
   ext_flash_sendData(pageAddress, 15); // Send page address
   ext_flash_sendData(bufferAddress, 9); // Send buffer address
   ext_flash_sendBytes(data, size); // Write data to the buffer
 
   DTFUnSelect(); // Disable select line
}
   
//------------------------------------------------------------------------------
#inline
void ext_flash_PageToBuffer(int16 pageAddress, int1 bufferNumber) {
   byte opcode;
   
   ext_flash_waitUntilReady();
   
   DTFSelect(); // Enable select line
   
   if (bufferNumber)
      opcode = 0x55; // Opcode for second buffer
   else
      opcode = 0x53; // Opcode for first buffer
   
   opcode = 0x53;
   ext_flash_sendData(opcode, 8); // Send opcode
   ext_flash_sendData(pageAddress, 15); // Send page address
   ext_flash_sendData(0, 9); // Send 9 don't care bits

   DTFUnSelect(); // Disable select line
}

//------------------------------------------------------------------------------
int1 ext_flash_comparePageToBuffer(int16 pageAddress, int1 bufferNumber) {
   int1 CompareFlag;
   byte opcode;
   
   ext_flash_waitUntilReady();
   
   DTFSelect(); // Enable select line
   
   if(bufferNumber)
      opcode = 0x61; // Opcode for second buffer
   else
      opcode = 0x60; // Opcode for first buffer
   
   ext_flash_sendData(opcode, 8); // Send opcode
   ext_flash_sendData(pageAddress, 15); // Send page address
   ext_flash_sendData(0, 9); // Send 9 don't care bits

   DTFUnSelect(); // Disable select line
   
   DTFSelect(); // Enable select line

   ext_flash_sendData(0xD7, 8); // Send status command

   while(!input(FLASH_DO)); // Wait until ready

   output_high(FLASH_CLOCK); // Pulse the clock
   output_low(FLASH_CLOCK);
   CompareFlag = !input(FLASH_DO); // Get the compare flag

   DTFUnSelect(); // Disable select line
   
   return CompareFlag;
}

//------------------------------------------------------------------------------
void ext_flash_rewritePage(int16 pageAddress, int bufferNumber) {
   byte opcode;
   
   ext_flash_waitUntilReady();
   
   DTFSelect();
   
   if (bufferNumber)
      opcode = 0x58;
   else
      opcode = 0x59;
   
   ext_flash_sendData(opcode, 8);
   ext_flash_sendData(pageAddress, 15);
   ext_flash_sendData(0, 9);

   DTFUnSelect();
}

//------------------------------------------------------------------------------
void ext_flash_sendData(int16 data, int8 size) {
   int8 i;

   data <<= (16-size);

   for (i = 0; i < size; ++i) {
      output_bit(FLASH_DI, shift_left(&data, 2, 0));
      output_high(FLASH_CLOCK);
      output_low(FLASH_CLOCK);
   }
}

//------------------------------------------------------------------------------
void ext_flash_sendBytes(byte* data, int16 size) {
   int16 i;
   signed int8 j;

   for (i = 0; i < size; ++i) {
      for (j = 7; j >= 0; --j) {
         output_bit(FLASH_DI, bit_test(data[i], j));
         output_high(FLASH_CLOCK);
         output_low(FLASH_CLOCK);
      }
   }
}




Code:

   init_ext_flash();
   
   if (QTDE_ROWS == 0) {
      fprintf(SERIAL, "MEMORIA OFF\n");   
   } else {
      fprintf(SERIAL, "%Lu\n", QTDE_ROWS);
   
      j = 0;
      for (i = 0; i < QTDE_ROWS; i++) {
         buffer[i] = 65 + j;
         
         j++;
         if (j == 26) j = 0;
         
         fprintf(SERIAL, "%c", buffer[i]);
      }
     
      fprintf(SERIAL, "\n");
     
      ext_flash_writeToBuffer(0, 0, buffer, QTDE_ROWS);
     
      for (i = 0; i < QTDE_ROWS; i++) buffer[i] = 0;
   
      ext_flash_readBuffer(0, 0, buffer, QTDE_ROWS);
     
      for (i = 0; i < QTDE_ROWS; i++) fprintf(SERIAL, "%c", buffer[i]);
      fprintf(SERIAL, "\n");
     
      ext_flash_BufferToPage(0, 0, 0);
     
      fprintf(SERIAL, "Linha\n");
      for (i = 0; i < QTDE_ROWS; i++) buffer[i] = 0;
     
      ext_flash_readPage(0, 0, buffer, QTDE_ROWS);
   
      for (i = 0; i < QTDE_ROWS; i++) fprintf(SERIAL, "%c", buffer[i]);
      fprintf(SERIAL, "\n");
   }

Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group