EraseEverything sketch how much it can take?

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darioconcilio

Well-known member
HI to all,
I'm using sketch EraseEverything on Teensy 3.2 with flash S25FL256S on macOS Sierra.

It shows me

Flash Memory has 33554432 bytes.
Erasing ALL Flash Memory:
estimated wait: 67 seconds.
Yes. full chip erase is SLOW!
......................

It lasted one night and was not finished yet, is it normal?
 
VCC => 3.3V of Teensy 3.2
CS => pin 9
SO/IO1 => pin 12
SCK => pin 13
SI/SO0 => pin 11
VSS => GND
WP#/IOS2 => GND

I compiled on Teensy 3.2 72 Mhz optimized speed, Arduino 1.6.12 with Teensyduino 1.31 (beta)
on macOS Sierra
 
There is a PJRC posted list on forum/github in a related area that shows the tested chips - not sure if this was one. Looking at the WP# definition it seems it may prevent writes when low - if so indicated in a status register?

Showing your sketch would confirm the right pins are specified as indicated for post #3 info - per forum rule
 
Into documentation shows this
2.8 Write Protect (WP#) / IO2
When WP# is driven Low (VIL), during a WRR command and while the Status Register Write Disable (SRWD) bit of the Status Register is set to a 1, it is not possible to write to the Status and Configuration Registers. This prevents any alteration of the Block Protect (BP2, BP1, BP0) and TBPROT bits of the Status Register. As a consequence, all the data bytes in the memory area that are protected by the Block Protect and TBPROT bits, are also hardware protected against data modification if WP# is Low during a WRR command.
The WP# function is not available when the Quad mode is enabled (CR[1]=1). The WP# function is replaced by IO2 for input and output during Quad mode for receiving addresses, and data to be programmed (values are latched on rising edge of the SCK signal) as well as shifting out data (on the falling edge of SCK, in SDR commands, and on every edge of SCK, in DDR commands).
WP# has an internal pull-up resistor; when unconnected, WP# is at VIH and may be left unconnected in the host system if not used for Quad mode.

I'm think that is correct connect pin WP to GND, is it correct for you?

My sketch is this
Code:
#include <SerialFlash.h>
#include <SPI.h>

const int FlashChipSelect = 9; // digital pin for flash chip CS pin

SerialFlashFile file;

const unsigned long testIncrement = 4096;

void setup() {
  //uncomment these if using Teensy audio shield
  SPI.setSCK(13);  // Audio shield has SCK on pin 14
  SPI.setMOSI(11);  // Audio shield has MOSI on pin 7
  SPI.setMISO(12);  
  
  //uncomment these if you have other SPI chips connected
  //to keep them disabled while using only SerialFlash
  //pinMode(4, INPUT_PULLUP);
  //pinMode(10, INPUT_PULLUP);

  // wait up to 10 seconds for Arduino Serial Monitor
  unsigned long startMillis = millis();
  while (!Serial && (millis() - startMillis < 10000)) ;
  delay(100);

  SerialFlash.begin(FlashChipSelect);
  unsigned char id[5];
  SerialFlash.readID(id);
  unsigned long size = SerialFlash.capacity(id);

  if (size > 0) {
    Serial.print("Flash Memory has ");
    Serial.print(size);
    Serial.println(" bytes.");
    Serial.println("Erasing ALL Flash Memory:");
    // Estimate the (lengthy) wait time.
    Serial.print("  estimated wait: ");
    int seconds = (float)size / eraseBytesPerSecond(id) + 0.5;
    Serial.print(seconds);
    Serial.println(" seconds.");
    Serial.println("  Yes, full chip erase is SLOW!");
    SerialFlash.eraseAll();
    unsigned long dotMillis = millis();
    unsigned char dotcount = 0;
    while (SerialFlash.ready() == false) {
      if (millis() - dotMillis > 1000) {
        dotMillis = dotMillis + 1000;
        Serial.print(".");
        dotcount = dotcount + 1;
        if (dotcount >= 60) {
          Serial.println();
          dotcount = 0;
        }
      }
    }
    if (dotcount > 0) Serial.println();
    Serial.println("Erase completed");
    unsigned long elapsed = millis() - startMillis;
    Serial.print("  actual wait: ");
    Serial.print(elapsed / 1000ul);
    Serial.println(" seconds.");
  }
}

float eraseBytesPerSecond(const unsigned char *id) {
  if (id[0] == 0x20) return 152000.0; // Micron
  if (id[0] == 0x01) return 500000.0; // Spansion
  if (id[0] == 0xEF) return 419430.0; // Winbond
  if (id[0] == 0xC2) return 279620.0; // Macronix
  return 320000.0; // guess?
}


void loop() {

}
 
Last edited:
Thanks Frank - I'm not practiced at reading those - but the only mention I saw to write protect was as noted above - "When WP# is driven Low ...". And this 'WP# is at VIH and may be left unconnected in the host system'. So it won't float, and unconnected it is pulled high internally.

note - advanced mode has a '#' block that is for insert code and is more readable. I just insert a 'QUOTE' and then quickly replace 'QUOT' with 'COD' on both ends to keep the bracing right.
 
Another thing,
if connected WP to VCC+, the sketch RawHadrwareTest shows me this

Code:
Raw SerialFlash Hardware Test

Read Chip Identification:
  JEDEC ID:     0 0 0
  Part Nummber: (unknown chip)
  Memory Size:  0 bytes

Tests Failed  :{

The flash chip may be left in an improper state.
You might need to power cycle to return to normal.

if connected WP to GND it shows me this:

Code:
Raw SerialFlash Hardware Test

Read Chip Identification:
  JEDEC ID:     1 2 19
  Part Nummber: S25FL256S
  Memory Size:  33554432 bytes
  Block Size:   65536 bytes

Reading Chip...
  Previous data found at address 0
  You must fully erase the chip before this test
  found this: E0 18 1F 21 D7 28 AE 2A 
     correct: 00 00 00 00 15 F5 95 4B 

Tests Failed  :{

The flash chip may be left in an improper state.
You might need to power cycle to return to normal.

I don't understand......

the code of sketch

Code:
// RawHardwareTest - Check if a SPI Flash chip is compatible
// with SerialFlash by performing many read and write tests
// to its memory.
//
// The chip should be fully erased before running this test.
// Use the EraseEverything to do a (slow) full chip erase.
//
// Normally you should NOT access the flash memory directly,
// as this test program does.  You should create files and
// read and write the files.  File creation allocates space
// with program & erase boundaries within the chip, to allow
// reading from any other files while a file is busy writing
// or erasing (if created as erasable).
//
// If you discover an incompatible chip, please report it here:
// https://github.com/PaulStoffregen/SerialFlash/issues
// You MUST post the complete output of this program, and
// the exact part number and manufacturer of the chip.


#include <SerialFlash.h>
#include <SPI.h>

const int FlashChipSelect = 9; // digital pin for flash chip CS pin

SerialFlashFile file;

const unsigned long testIncrement = 4096;

void setup() {

  //uncomment these if using Teensy audio shield
  SPI.setSCK(13);  // Audio shield has SCK on pin 14
  SPI.setMOSI(11);  // Audio shield has MOSI on pin 7
  SPI.setMISO(12);
  
  //uncomment these if you have other SPI chips connected
  //to keep them disabled while using only SerialFlash
  //pinMode(4, INPUT_PULLUP);
  //pinMode(10, INPUT_PULLUP);

  while (!Serial) ;
  delay(100);

  Serial.println("Raw SerialFlash Hardware Test");
  SerialFlash.begin(FlashChipSelect);

  if (test()) {
    Serial.println();
    Serial.println("All Tests Passed  :-)");
    Serial.println();
    Serial.println("Test data was written to your chip.  You must run");
    Serial.println("EraseEverything before using this chip for files.");
  } else {
    Serial.println();
    Serial.println("Tests Failed  :{");
    Serial.println();
    Serial.println("The flash chip may be left in an improper state.");
    Serial.println("You might need to power cycle to return to normal.");
  }
}


bool test() {
  unsigned char buf[256], sig[256], buf2[8];
  unsigned long address, count, chipsize, blocksize;
  unsigned long usec;
  bool first;

  // Read the chip identification
  Serial.println();
  Serial.println("Read Chip Identification:");
  SerialFlash.readID(buf);
  Serial.print("  JEDEC ID:     ");
  Serial.print(buf[0], HEX);
  Serial.print(" ");
  Serial.print(buf[1], HEX);
  Serial.print(" ");
  Serial.println(buf[2], HEX);
  Serial.print("  Part Nummber: ");
  Serial.println(id2chip(buf));
  Serial.print("  Memory Size:  ");
  chipsize = SerialFlash.capacity(buf);
  Serial.print(chipsize);
  Serial.println(" bytes");
  if (chipsize == 0) return false;
  Serial.print("  Block Size:   ");
  blocksize = SerialFlash.blockSize();
  Serial.print(blocksize);
  Serial.println(" bytes");


  // Read the entire chip.  Every test location must be
  // erased, or have a previously tested signature
  Serial.println();
  Serial.println("Reading Chip...");
  memset(buf, 0, sizeof(buf));
  memset(sig, 0, sizeof(sig));
  memset(buf2, 0, sizeof(buf2));
  address = 0;
  count = 0;
  first = true;
  while (address < chipsize) {
    SerialFlash.read(address, buf, 8);
    //Serial.print("  addr = ");
    //Serial.print(address, HEX);
    //Serial.print(", data = ");
    //printbuf(buf, 8);
    create_signature(address, sig);
    if (is_erased(buf, 8) == false) {
      if (equal_signatures(buf, sig) == false) {
        Serial.print("  Previous data found at address ");
        Serial.println(address);
        Serial.println("  You must fully erase the chip before this test");
        Serial.print("  found this: ");
        printbuf(buf, 8);
        Serial.print("     correct: ");
        printbuf(sig, 8);
        return false;
      }
    } else {
      count = count + 1; // number of blank signatures
    }
    if (first) {
      address = address + (testIncrement - 8);
      first = false;
    } else {
      address = address + 8;
      first = true;
    }
  }


  // Write any signatures that were blank on the original check
  if (count > 0) {
    Serial.println();
    Serial.print("Writing ");
    Serial.print(count);
    Serial.println(" signatures");
    memset(buf, 0, sizeof(buf));
    memset(sig, 0, sizeof(sig));
    memset(buf2, 0, sizeof(buf2));
    address = 0;
    first = true;
    while (address < chipsize) {
      SerialFlash.read(address, buf, 8);
      if (is_erased(buf, 8)) {
        create_signature(address, sig);
        //Serial.printf("write %08X: data: ", address);
        //printbuf(sig, 8);
        SerialFlash.write(address, sig, 8);
        while (!SerialFlash.ready()) ; // wait
        SerialFlash.read(address, buf, 8);
        if (equal_signatures(buf, sig) == false) {
          Serial.print("  error writing signature at ");
          Serial.println(address);
          Serial.print("  Read this: ");
          printbuf(buf, 8);
          Serial.print("  Expected:  ");
          printbuf(sig, 8);
          return false;
        }
      }
      if (first) {
        address = address + (testIncrement - 8);
        first = false;
      } else {
        address = address + 8;
        first = true;
      }
    }
  } else {
    Serial.println("  all signatures present from prior tests");
  }


  // Read all the signatures again, just to be sure
  // checks prior writing didn't corrupt any other data
  Serial.println();
  Serial.println("Double Checking All Signatures:");
  memset(buf, 0, sizeof(buf));
  memset(sig, 0, sizeof(sig));
  memset(buf2, 0, sizeof(buf2));
  count = 0;
  address = 0;
  first = true;
  while (address < chipsize) {
    SerialFlash.read(address, buf, 8);
    create_signature(address, sig);
    if (equal_signatures(buf, sig) == false) {
      Serial.print("  error in signature at ");
      Serial.println(address);
      Serial.print("  Read this: ");
      printbuf(buf, 8);
      Serial.print("  Expected:  ");
      printbuf(sig, 8);
      return false;
    }
    count = count + 1;
    if (first) {
      address = address + (testIncrement - 8);
      first = false;
    } else {
      address = address + 8;
      first = true;
    }
  }
  Serial.print("  all ");
  Serial.print(count);
  Serial.println(" signatures read ok");


  // Read pairs of adjacent signatures
  // check read works across boundaries
  Serial.println();
  Serial.println("Checking Signature Pairs");
  memset(buf, 0, sizeof(buf));
  memset(sig, 0, sizeof(sig));
  memset(buf2, 0, sizeof(buf2));
  count = 0;
  address = testIncrement - 8;
  first = true;
  while (address < chipsize - 8) {
    SerialFlash.read(address, buf, 16);
    create_signature(address, sig);
    create_signature(address + 8, sig + 8);
    if (memcmp(buf, sig, 16) != 0) {
      Serial.print("  error in signature pair at ");
      Serial.println(address);
      Serial.print("  Read this: ");
      printbuf(buf, 16);
      Serial.print("  Expected:  ");
      printbuf(sig, 16);
      return false;
    }
    count = count + 1;
    address = address + testIncrement;
  }
  Serial.print("  all ");
  Serial.print(count);
  Serial.println(" signature pairs read ok");


  // Write data and read while write in progress
  Serial.println();
  Serial.println("Checking Read-While-Write (Program Suspend)");
  address = 256;
  while (address < chipsize) { // find a blank space
    SerialFlash.read(address, buf, 256);
    if (is_erased(buf, 256)) break;
    address = address + 256;
  }
  if (address >= chipsize) {
    Serial.println("  error, unable to find any blank space!");
    return false;
  }
  for (int i=0; i < 256; i += 8) {
    create_signature(address + i, sig + i);
  }
  Serial.print("  write 256 bytes at ");
  Serial.println(address);
  Serial.flush();
  SerialFlash.write(address, sig, 256);
  usec = micros();
  if (SerialFlash.ready()) {
    Serial.println("  error, chip did not become busy after write");
    return false;
  }
  SerialFlash.read(0, buf2, 8); // read while busy writing
  while (!SerialFlash.ready()) ; // wait
  usec = micros() - usec;
  Serial.print("  write time was ");
  Serial.print(usec);
  Serial.println(" microseconds.");
  SerialFlash.read(address, buf, 256);
  if (memcmp(buf, sig, 256) != 0) {
    Serial.println("  error writing to flash");
    Serial.print("  Read this: ");
    printbuf(buf, 256);
    Serial.print("  Expected:  ");
    printbuf(sig, 256);
    return false;
  }
  create_signature(0, sig);
  if (memcmp(buf2, sig, 8) != 0) {
    Serial.println("  error, incorrect read while writing");
    Serial.print("  Read this: ");
    printbuf(buf2, 256);
    Serial.print("  Expected:  ");
    printbuf(sig, 256);
    return false;
  }
  Serial.print("  read-while-writing: ");
  printbuf(buf2, 8);
  Serial.println("  test passed, good read while writing");



  // Erase a block and read while erase in progress
  if (chipsize >= 262144 + blocksize + testIncrement) {
    Serial.println();
    Serial.println("Checking Read-While-Erase (Erase Suspend)");
    memset(buf, 0, sizeof(buf));
    memset(sig, 0, sizeof(sig));
    memset(buf2, 0, sizeof(buf2));
    SerialFlash.eraseBlock(262144);
    usec = micros();
    delayMicroseconds(50);
    if (SerialFlash.ready()) {
      Serial.println("  error, chip did not become busy after erase");
      return false;
    }
    SerialFlash.read(0, buf2, 8); // read while busy writing
    while (!SerialFlash.ready()) ; // wait
    usec = micros() - usec;
    Serial.print("  erase time was ");
    Serial.print(usec);
    Serial.println(" microseconds.");
    // read all signatures, check ones in this block got
    // erased, and all the others are still intact
    address = 0;
    first = true;
    while (address < chipsize) {
      SerialFlash.read(address, buf, 8);
      if (address >= 262144 && address < 262144 + blocksize) {
        if (is_erased(buf, 8) == false) {
          Serial.print("  error in erasing at ");
          Serial.println(address);
          Serial.print("  Read this: ");
          printbuf(buf, 8);
          return false;
        }
      } else {
        create_signature(address, sig);
        if (equal_signatures(buf, sig) == false) {
          Serial.print("  error in signature at ");
          Serial.println(address);
          Serial.print("  Read this: ");
          printbuf(buf, 8);
          Serial.print("  Expected:  ");
          printbuf(sig, 8);
          return false;
        }
      }
      if (first) {
        address = address + (testIncrement - 8);
        first = false;
      } else {
        address = address + 8;
        first = true;
      }
    }
    Serial.print("  erase correctly erased ");
    Serial.print(blocksize);
    Serial.println(" bytes");
    // now check if the data we read during erase is good
    create_signature(0, sig);
    if (memcmp(buf2, sig, 8) != 0) {
      Serial.println("  error, incorrect read while erasing");
      Serial.print("  Read this: ");
      printbuf(buf2, 256);
      Serial.print("  Expected:  ");
      printbuf(sig, 256);
      return false;
    }
    Serial.print("  read-while-erasing: ");
    printbuf(buf2, 8);
    Serial.println("  test passed, good read while erasing");

  } else {
    Serial.println("Skip Read-While-Erase, this chip is too small");
  }




  return true;
}


void loop() {
  // do nothing after the test
}

const char * id2chip(const unsigned char *id)
{
	if (id[0] == 0xEF) {
		// Winbond
		if (id[1] == 0x40) {
			if (id[2] == 0x14) return "W25Q80BV";
			if (id[2] == 0x17) return "W25Q64FV";
			if (id[2] == 0x18) return "W25Q128FV";
			if (id[2] == 0x19) return "W25Q256FV";
		}
	}
	if (id[0] == 0x01) {
		// Spansion
		if (id[1] == 0x02) {
			if (id[2] == 0x16) return "S25FL064A";
			if (id[2] == 0x19) return "S25FL256S";
			if (id[2] == 0x20) return "S25FL512S";
		}
		if (id[1] == 0x20) {
			if (id[2] == 0x18) return "S25FL127S";
		}
	}
	if (id[0] == 0xC2) {
		// Macronix
		if (id[1] == 0x20) {
			if (id[2] == 0x18) return "MX25L12805D";
		}
	}
	if (id[0] == 0x20) {
		// Micron
		if (id[1] == 0xBA) {
			if (id[2] == 0x20) return "N25Q512A";
			if (id[2] == 0x21) return "N25Q00AA";
		}
		if (id[1] == 0xBB) {
			if (id[2] == 0x22) return "MT25QL02GC";
		}
	}
	if (id[0] == 0xBF) {
		// SST
		if (id[1] == 0x25) {
			if (id[2] == 0x02) return "SST25WF010";
			if (id[2] == 0x03) return "SST25WF020";
			if (id[2] == 0x04) return "SST25WF040";
			if (id[2] == 0x41) return "SST25VF016B";
			if (id[2] == 0x4A) return "SST25VF032";
		}
		if (id[1] == 0x25) {
			if (id[2] == 0x01) return "SST26VF016";
			if (id[2] == 0x02) return "SST26VF032";
			if (id[2] == 0x43) return "SST26VF064";
		}
	}
	return "(unknown chip)";
}

void print_signature(const unsigned char *data)
{
	Serial.print("data=");
	for (unsigned char i=0; i < 8; i++) {
		Serial.print(data[i]);
		Serial.print(" ");
	}
	Serial.println();
}

void create_signature(unsigned long address, unsigned char *data)
{
	data[0] = address >> 24;
	data[1] = address >> 16;
	data[2] = address >> 8;
	data[3] = address;
	unsigned long hash = 2166136261ul;
	for (unsigned char i=0; i < 4; i++) {
		hash ^= data[i];
		hash *= 16777619ul;
	}
	data[4] = hash;
	data[5] = hash >> 8;
	data[6] = hash >> 16;
	data[7] = hash >> 24;
}

bool equal_signatures(const unsigned char *data1, const unsigned char *data2)
{
	for (unsigned char i=0; i < 8; i++) {
		if (data1[i] != data2[i]) return false;
	}
	return true;
}

bool is_erased(const unsigned char *data, unsigned int len)
{
	while (len > 0) {
		if (*data++ != 255) return false;
		len = len - 1;
	}
	return true;
}


void printbuf(const void *buf, uint32_t len)
{
  const uint8_t *p = (const uint8_t *)buf;
  do {
    unsigned char b = *p++;
    Serial.print(b >> 4, HEX);
    Serial.print(b & 15, HEX);
    //Serial.printf("%02X", *p++);
    Serial.print(" ");
  } while (--len > 0);
  Serial.println();
}
 
Ok. aftere re-reading your post with your connections: There is one Pin missing. Pin 7 must be connected to VCC, too.
How long are your connections ? Use very short cables.

Is it possible to post a photo ?
 
what do you mean?

pin 7 of flash or pin 7 of teensy?

Because pin 7 of flash is CS, it is already connected to 9,
instead pin 7 of teensy 3.2 is DOUT/RX3, I do not think you mean this

Schermata 2016-09-28 alle 07.42.26.png
 
Ok, you did not mention or i missed it that we are talking about 16 pin package.
I was talking about the Hold pin.
I dont know the 16 pin package.
 
This is my breadboard

wp_20161002_14_35_26_pro.jpg

this is schema of flash Cypress S25FL256SAGMFIR01

Schermata 2016-10-02 alle 14.31.33.png

there are my scketches

RawHardwareTest

Code:
// RawHardwareTest - Check if a SPI Flash chip is compatible
// with SerialFlash by performing many read and write tests
// to its memory.
//
// The chip should be fully erased before running this test.
// Use the EraseEverything to do a (slow) full chip erase.
//
// Normally you should NOT access the flash memory directly,
// as this test program does.  You should create files and
// read and write the files.  File creation allocates space
// with program & erase boundaries within the chip, to allow
// reading from any other files while a file is busy writing
// or erasing (if created as erasable).
//
// If you discover an incompatible chip, please report it here:
// https://github.com/PaulStoffregen/SerialFlash/issues
// You MUST post the complete output of this program, and
// the exact part number and manufacturer of the chip.


#include <SerialFlash.h>
#include <SPI.h>

const int FlashChipSelect = 9; // digital pin for flash chip CS pin

SerialFlashFile file;

const unsigned long testIncrement = 4096;

void setup() {

  //uncomment these if using Teensy audio shield
  SPI.setSCK(14);  // Audio shield has SCK on pin 14
  SPI.setMOSI(11);  // Audio shield has MOSI on pin 7
  SPI.setMISO(12);
  
  //uncomment these if you have other SPI chips connected
  //to keep them disabled while using only SerialFlash
  //pinMode(4, INPUT_PULLUP);
  //pinMode(10, INPUT_PULLUP);

  while (!Serial) ;
  delay(100);

  Serial.println("Raw SerialFlash Hardware Test");
  SerialFlash.begin(FlashChipSelect);

  if (test()) {
    Serial.println();
    Serial.println("All Tests Passed  :-)");
    Serial.println();
    Serial.println("Test data was written to your chip.  You must run");
    Serial.println("EraseEverything before using this chip for files.");
  } else {
    Serial.println();
    Serial.println("Tests Failed  :{");
    Serial.println();
    Serial.println("The flash chip may be left in an improper state.");
    Serial.println("You might need to power cycle to return to normal.");
  }
}


bool test() {
  unsigned char buf[256], sig[256], buf2[8];
  unsigned long address, count, chipsize, blocksize;
  unsigned long usec;
  bool first;

  // Read the chip identification
  Serial.println();
  Serial.println("Read Chip Identification:");
  SerialFlash.readID(buf);
  Serial.print("  JEDEC ID:     ");
  Serial.print(buf[0], HEX);
  Serial.print(" ");
  Serial.print(buf[1], HEX);
  Serial.print(" ");
  Serial.println(buf[2], HEX);
  Serial.print("  Part Nummber: ");
  Serial.println(id2chip(buf));
  Serial.print("  Memory Size:  ");
  chipsize = SerialFlash.capacity(buf);
  Serial.print(chipsize);
  Serial.println(" bytes");
  if (chipsize == 0) return false;
  Serial.print("  Block Size:   ");
  blocksize = SerialFlash.blockSize();
  Serial.print(blocksize);
  Serial.println(" bytes");


  // Read the entire chip.  Every test location must be
  // erased, or have a previously tested signature
  Serial.println();
  Serial.println("Reading Chip...");
  memset(buf, 0, sizeof(buf));
  memset(sig, 0, sizeof(sig));
  memset(buf2, 0, sizeof(buf2));
  address = 0;
  count = 0;
  first = true;
  while (address < chipsize) {
    SerialFlash.read(address, buf, 8);
    //Serial.print("  addr = ");
    //Serial.print(address, HEX);
    //Serial.print(", data = ");
    //printbuf(buf, 8);
    create_signature(address, sig);
    if (is_erased(buf, 8) == false) {
      if (equal_signatures(buf, sig) == false) {
        Serial.print("  Previous data found at address ");
        Serial.println(address);
        Serial.println("  You must fully erase the chip before this test");
        Serial.print("  found this: ");
        printbuf(buf, 8);
        Serial.print("     correct: ");
        printbuf(sig, 8);
        return false;
      }
    } else {
      count = count + 1; // number of blank signatures
    }
    if (first) {
      address = address + (testIncrement - 8);
      first = false;
    } else {
      address = address + 8;
      first = true;
    }
  }


  // Write any signatures that were blank on the original check
  if (count > 0) {
    Serial.println();
    Serial.print("Writing ");
    Serial.print(count);
    Serial.println(" signatures");
    memset(buf, 0, sizeof(buf));
    memset(sig, 0, sizeof(sig));
    memset(buf2, 0, sizeof(buf2));
    address = 0;
    first = true;
    while (address < chipsize) {
      SerialFlash.read(address, buf, 8);
      if (is_erased(buf, 8)) {
        create_signature(address, sig);
        //Serial.printf("write %08X: data: ", address);
        //printbuf(sig, 8);
        SerialFlash.write(address, sig, 8);
        while (!SerialFlash.ready()) ; // wait
        SerialFlash.read(address, buf, 8);
        if (equal_signatures(buf, sig) == false) {
          Serial.print("  error writing signature at ");
          Serial.println(address);
          Serial.print("  Read this: ");
          printbuf(buf, 8);
          Serial.print("  Expected:  ");
          printbuf(sig, 8);
          return false;
        }
      }
      if (first) {
        address = address + (testIncrement - 8);
        first = false;
      } else {
        address = address + 8;
        first = true;
      }
    }
  } else {
    Serial.println("  all signatures present from prior tests");
  }


  // Read all the signatures again, just to be sure
  // checks prior writing didn't corrupt any other data
  Serial.println();
  Serial.println("Double Checking All Signatures:");
  memset(buf, 0, sizeof(buf));
  memset(sig, 0, sizeof(sig));
  memset(buf2, 0, sizeof(buf2));
  count = 0;
  address = 0;
  first = true;
  while (address < chipsize) {
    SerialFlash.read(address, buf, 8);
    create_signature(address, sig);
    if (equal_signatures(buf, sig) == false) {
      Serial.print("  error in signature at ");
      Serial.println(address);
      Serial.print("  Read this: ");
      printbuf(buf, 8);
      Serial.print("  Expected:  ");
      printbuf(sig, 8);
      return false;
    }
    count = count + 1;
    if (first) {
      address = address + (testIncrement - 8);
      first = false;
    } else {
      address = address + 8;
      first = true;
    }
  }
  Serial.print("  all ");
  Serial.print(count);
  Serial.println(" signatures read ok");


  // Read pairs of adjacent signatures
  // check read works across boundaries
  Serial.println();
  Serial.println("Checking Signature Pairs");
  memset(buf, 0, sizeof(buf));
  memset(sig, 0, sizeof(sig));
  memset(buf2, 0, sizeof(buf2));
  count = 0;
  address = testIncrement - 8;
  first = true;
  while (address < chipsize - 8) {
    SerialFlash.read(address, buf, 16);
    create_signature(address, sig);
    create_signature(address + 8, sig + 8);
    if (memcmp(buf, sig, 16) != 0) {
      Serial.print("  error in signature pair at ");
      Serial.println(address);
      Serial.print("  Read this: ");
      printbuf(buf, 16);
      Serial.print("  Expected:  ");
      printbuf(sig, 16);
      return false;
    }
    count = count + 1;
    address = address + testIncrement;
  }
  Serial.print("  all ");
  Serial.print(count);
  Serial.println(" signature pairs read ok");


  // Write data and read while write in progress
  Serial.println();
  Serial.println("Checking Read-While-Write (Program Suspend)");
  address = 256;
  while (address < chipsize) { // find a blank space
    SerialFlash.read(address, buf, 256);
    if (is_erased(buf, 256)) break;
    address = address + 256;
  }
  if (address >= chipsize) {
    Serial.println("  error, unable to find any blank space!");
    return false;
  }
  for (int i=0; i < 256; i += 8) {
    create_signature(address + i, sig + i);
  }
  Serial.print("  write 256 bytes at ");
  Serial.println(address);
  Serial.flush();
  SerialFlash.write(address, sig, 256);
  usec = micros();
  if (SerialFlash.ready()) {
    Serial.println("  error, chip did not become busy after write");
    return false;
  }
  SerialFlash.read(0, buf2, 8); // read while busy writing
  while (!SerialFlash.ready()) ; // wait
  usec = micros() - usec;
  Serial.print("  write time was ");
  Serial.print(usec);
  Serial.println(" microseconds.");
  SerialFlash.read(address, buf, 256);
  if (memcmp(buf, sig, 256) != 0) {
    Serial.println("  error writing to flash");
    Serial.print("  Read this: ");
    printbuf(buf, 256);
    Serial.print("  Expected:  ");
    printbuf(sig, 256);
    return false;
  }
  create_signature(0, sig);
  if (memcmp(buf2, sig, 8) != 0) {
    Serial.println("  error, incorrect read while writing");
    Serial.print("  Read this: ");
    printbuf(buf2, 256);
    Serial.print("  Expected:  ");
    printbuf(sig, 256);
    return false;
  }
  Serial.print("  read-while-writing: ");
  printbuf(buf2, 8);
  Serial.println("  test passed, good read while writing");



  // Erase a block and read while erase in progress
  if (chipsize >= 262144 + blocksize + testIncrement) {
    Serial.println();
    Serial.println("Checking Read-While-Erase (Erase Suspend)");
    memset(buf, 0, sizeof(buf));
    memset(sig, 0, sizeof(sig));
    memset(buf2, 0, sizeof(buf2));
    SerialFlash.eraseBlock(262144);
    usec = micros();
    delayMicroseconds(50);
    if (SerialFlash.ready()) {
      Serial.println("  error, chip did not become busy after erase");
      return false;
    }
    SerialFlash.read(0, buf2, 8); // read while busy writing
    while (!SerialFlash.ready()) ; // wait
    usec = micros() - usec;
    Serial.print("  erase time was ");
    Serial.print(usec);
    Serial.println(" microseconds.");
    // read all signatures, check ones in this block got
    // erased, and all the others are still intact
    address = 0;
    first = true;
    while (address < chipsize) {
      SerialFlash.read(address, buf, 8);
      if (address >= 262144 && address < 262144 + blocksize) {
        if (is_erased(buf, 8) == false) {
          Serial.print("  error in erasing at ");
          Serial.println(address);
          Serial.print("  Read this: ");
          printbuf(buf, 8);
          return false;
        }
      } else {
        create_signature(address, sig);
        if (equal_signatures(buf, sig) == false) {
          Serial.print("  error in signature at ");
          Serial.println(address);
          Serial.print("  Read this: ");
          printbuf(buf, 8);
          Serial.print("  Expected:  ");
          printbuf(sig, 8);
          return false;
        }
      }
      if (first) {
        address = address + (testIncrement - 8);
        first = false;
      } else {
        address = address + 8;
        first = true;
      }
    }
    Serial.print("  erase correctly erased ");
    Serial.print(blocksize);
    Serial.println(" bytes");
    // now check if the data we read during erase is good
    create_signature(0, sig);
    if (memcmp(buf2, sig, 8) != 0) {
      Serial.println("  error, incorrect read while erasing");
      Serial.print("  Read this: ");
      printbuf(buf2, 256);
      Serial.print("  Expected:  ");
      printbuf(sig, 256);
      return false;
    }
    Serial.print("  read-while-erasing: ");
    printbuf(buf2, 8);
    Serial.println("  test passed, good read while erasing");

  } else {
    Serial.println("Skip Read-While-Erase, this chip is too small");
  }




  return true;
}


void loop() {
  // do nothing after the test
}

const char * id2chip(const unsigned char *id)
{
	if (id[0] == 0xEF) {
		// Winbond
		if (id[1] == 0x40) {
			if (id[2] == 0x14) return "W25Q80BV";
			if (id[2] == 0x17) return "W25Q64FV";
			if (id[2] == 0x18) return "W25Q128FV";
			if (id[2] == 0x19) return "W25Q256FV";
		}
	}
	if (id[0] == 0x01) {
		// Spansion
		if (id[1] == 0x02) {
			if (id[2] == 0x16) return "S25FL064A";
			if (id[2] == 0x19) return "S25FL256S";
			if (id[2] == 0x20) return "S25FL512S";
		}
		if (id[1] == 0x20) {
			if (id[2] == 0x18) return "S25FL127S";
		}
	}
	if (id[0] == 0xC2) {
		// Macronix
		if (id[1] == 0x20) {
			if (id[2] == 0x18) return "MX25L12805D";
		}
	}
	if (id[0] == 0x20) {
		// Micron
		if (id[1] == 0xBA) {
			if (id[2] == 0x20) return "N25Q512A";
			if (id[2] == 0x21) return "N25Q00AA";
		}
		if (id[1] == 0xBB) {
			if (id[2] == 0x22) return "MT25QL02GC";
		}
	}
	if (id[0] == 0xBF) {
		// SST
		if (id[1] == 0x25) {
			if (id[2] == 0x02) return "SST25WF010";
			if (id[2] == 0x03) return "SST25WF020";
			if (id[2] == 0x04) return "SST25WF040";
			if (id[2] == 0x41) return "SST25VF016B";
			if (id[2] == 0x4A) return "SST25VF032";
		}
		if (id[1] == 0x25) {
			if (id[2] == 0x01) return "SST26VF016";
			if (id[2] == 0x02) return "SST26VF032";
			if (id[2] == 0x43) return "SST26VF064";
		}
	}
	return "(unknown chip)";
}

void print_signature(const unsigned char *data)
{
	Serial.print("data=");
	for (unsigned char i=0; i < 8; i++) {
		Serial.print(data[i]);
		Serial.print(" ");
	}
	Serial.println();
}

void create_signature(unsigned long address, unsigned char *data)
{
	data[0] = address >> 24;
	data[1] = address >> 16;
	data[2] = address >> 8;
	data[3] = address;
	unsigned long hash = 2166136261ul;
	for (unsigned char i=0; i < 4; i++) {
		hash ^= data[i];
		hash *= 16777619ul;
	}
	data[4] = hash;
	data[5] = hash >> 8;
	data[6] = hash >> 16;
	data[7] = hash >> 24;
}

bool equal_signatures(const unsigned char *data1, const unsigned char *data2)
{
	for (unsigned char i=0; i < 8; i++) {
		if (data1[i] != data2[i]) return false;
	}
	return true;
}

bool is_erased(const unsigned char *data, unsigned int len)
{
	while (len > 0) {
		if (*data++ != 255) return false;
		len = len - 1;
	}
	return true;
}


void printbuf(const void *buf, uint32_t len)
{
  const uint8_t *p = (const uint8_t *)buf;
  do {
    unsigned char b = *p++;
    Serial.print(b >> 4, HEX);
    Serial.print(b & 15, HEX);
    //Serial.printf("%02X", *p++);
    Serial.print(" ");
  } while (--len > 0);
  Serial.println();
}

EraseEverything

Code:
#include <SerialFlash.h>
#include <SPI.h>

const int FlashChipSelect = 9; // digital pin for flash chip CS pin

SerialFlashFile file;

const unsigned long testIncrement = 4096;

void setup() {
  //uncomment these if using Teensy audio shield
  SPI.setSCK(14);  // Audio shield has SCK on pin 14
  SPI.setMOSI(11);  // Audio shield has MOSI on pin 7
  SPI.setMISO(12);  
  
  //uncomment these if you have other SPI chips connected
  //to keep them disabled while using only SerialFlash
  //pinMode(4, INPUT_PULLUP);
  //pinMode(10, INPUT_PULLUP);

  // wait up to 10 seconds for Arduino Serial Monitor
  unsigned long startMillis = millis();
  while (!Serial && (millis() - startMillis < 10000)) ;
  delay(100);

  SerialFlash.begin(FlashChipSelect);
  unsigned char id[5];
  SerialFlash.readID(id);
  unsigned long size = SerialFlash.capacity(id);

  if (size > 0) {
    Serial.print("Flash Memory has ");
    Serial.print(size);
    Serial.println(" bytes.");
    Serial.println("Erasing ALL Flash Memory:");
    // Estimate the (lengthy) wait time.
    Serial.print("  estimated wait: ");
    int seconds = (float)size / eraseBytesPerSecond(id) + 0.5;
    Serial.print(seconds);
    Serial.println(" seconds.");
    Serial.println("  Yes, full chip erase is SLOW!");
    SerialFlash.eraseAll();
    unsigned long dotMillis = millis();
    unsigned char dotcount = 0;
    while (SerialFlash.ready() == false) {
      if (millis() - dotMillis > 1000) {
        dotMillis = dotMillis + 1000;
        Serial.print(".");
        dotcount = dotcount + 1;
        if (dotcount >= 60) {
          Serial.println();
          dotcount = 0;
        }
      }
    }
    if (dotcount > 0) Serial.println();
    Serial.println("Erase completed");
    unsigned long elapsed = millis() - startMillis;
    Serial.print("  actual wait: ");
    Serial.print(elapsed / 1000ul);
    Serial.println(" seconds.");
  }
}

float eraseBytesPerSecond(const unsigned char *id) {
  if (id[0] == 0x20) return 152000.0; // Micron
  if (id[0] == 0x01) return 500000.0; // Spansion
  if (id[0] == 0xEF) return 419430.0; // Winbond
  if (id[0] == 0xC2) return 279620.0; // Macronix
  return 320000.0; // guess?
}


void loop() {

}

Mac with Sierra
Arduino IDE 1.6.12
Teensyduino 1.31
 
I tried your second sketch with my board (only adjusted pin-numbers) - works.
On your photo, the HOLD-Pin (Pin 1) is - still - not connected. Same for WP. Both need a HIGH Level.
For the other Pins: - i don't know if more connections are needed - so please read the datasheet carefully...
 
Last edited:
Ok!
I think I understand.
I connect HOLD and WP to pin 2 = HIGH level,
after that, I find out that there are problem using 72 Mhz clock, then I compile again at 48Mhz, and all it works.

Thank you very much to all.
I hope someday I can repay.
 
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