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Thread: NAND flash support in 1.54

  1. #101
    Senior Member+ defragster's Avatar
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    @mjs513 - got the latest 2hr old changes. Will get it built and at least a quick look shortly.

    @KurtE - I made sure to test T_4.1 before - did skip that once - always a bit of wonder while waiting for it to dry. Did you do NAND before or after the edge pins? I suppose before - that is tight spacing.

  2. #102
    Senior Member+ mjs513's Avatar
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    @KurtE - Welcome to the party

    @defragster - have fun with it. Think done for now until ......

  3. #103
    Senior Member+ defragster's Avatar
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    This :: int w25n01g_t4::readBytes(uint32_t Address, uint8_t *data, int length)
    \w25n01g_t4.cpp:562:1: warning: no return statement in function returning non-void [-Wreturn-type]
    doesn't have any:: return int_??;

    After a run leaving the 42 on NAND - a Power Off/On fails to find the 42's after Init?
    Code:
        NAND ============================ check42() : COMPARE !!!!
    	 took 4709744 elapsed us
    Good, 	Found 42 in NAND 0x8000000 Times
    Begin Init
    Found W25N01G Flash Chip
        NAND ============================ check42() : COMPARE !!!!
      0=     255
    	+++ NOT 42 Good Run of 1 {bad @ 0}
    The 42's are found on UPLOAD or RESET. Almost like something isn't 'READY' for first read on fresh POWER up?

  4. #104
    Senior Member+ mjs513's Avatar
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    Quote Originally Posted by defragster View Post
    This :: int w25n01g_t4::readBytes(uint32_t Address, uint8_t *data, int length)

    doesn't have any:: return int_??;

    After a run leaving the 42 on NAND - a Power Off/On fails to find the 42's after Init?
    Code:
        NAND ============================ check42() : COMPARE !!!!
    	 took 4709744 elapsed us
    Good, 	Found 42 in NAND 0x8000000 Times
    Begin Init
    Found W25N01G Flash Chip
        NAND ============================ check42() : COMPARE !!!!
      0=     255
    	+++ NOT 42 Good Run of 1 {bad @ 0}
    The 42's are found on UPLOAD or RESET. Almost like something isn't 'READY' for first read on fresh POWER up?
    Worse than that - there is a major bug in the lib - as soon as I remove power the chip looses what we wrote !!!!

    has a test use this instead of check42(false) in setup! and you will see what I mean:
    Code:
      //check42(false);
      memset(x42, 0, arraySize);
      myNAND.readBytes(0, x42, arraySize);
    
      for (uint16_t i = 0; i < arraySize; i++) {
        Serial.printf("0x%02x, ", x42[i]);
        if (i % 100 == 0) Serial.println();
      } Serial.println();
    
      Serial.println();
      //Lets try an erase
      //myNAND.deviceErase();  //Erase chip
      //Serial.println("Reading Data");
      memset(buffer, 0, 2048);
      myNAND.readBytes(4094, buffer, 16);
      
      for (uint16_t i = 0; i < 16; i++) {
        Serial.printf("0x%02x, ", buffer[i]);
      } Serial.println();

  5. #105
    It looks like you are trying to write twice to the same page out of order, which I think is forbidden.
    Code:
      memset(buffer, 0xFF, 2048);
      for (uint16_t i = 0; i < 2048; i++) buffer[i] = i;
      myNAND.writeBytes(4094, buffer, 16);
    
      //Serial.println("Reading Data");
      memset(buffer, 0, 2048);
      myNAND.readBytes(4094, buffer, 16);
    
      for (uint16_t i = 0; i < 16; i++) {
        Serial.printf("0x%02x, ", buffer[i]);
      } Serial.println();
    
    
      const uint8_t beefy[] = "DEADBEEFdeadbeef\n";
      //Serial.println("Loading data");
      Dprint( (char *)beefy )
      memset(buffer, 0, 2048);
      for(uint8_t j = 0; j < sizeof(beefy); j++) buffer[j] = beefy[j];
    
      myNAND.writeBytes(4000, buffer, sizeof(beefy));
    EDIT: "The pages within the block have to be programmed sequentially from the lower order page address to the higher order page address within the block. Programming pages out of sequence is prohibited." So Maybe you can do (up to 4) writes to the page out of order? But you can't go back and program at address 0 after address 4000+?

  6. #106
    Senior Member+ mjs513's Avatar
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    Think that restriction is on a per Program Execute command. But even with that it doesn't explain why the data is not being retained by flash after power off.

    Even if I only do a single write and read operation when power is recycled i will still get 0xff, for instance:
    Code:
    Begin Init
    Found W25N01G Flash Chip
    [On power recycle]
    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
    [After write and then read]
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    Yet if I just reload the sketch you see:
    Code:
    Begin Init
    Found W25N01G Flash Chip
    
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 
    
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    Data is retained?

    Heres the setup to do that:
    Code:
    void setup() {
      Serial.begin(115200);
      delay(1000);
      Serial.println("Begin Init");
    
      myNAND.begin();
    
      //check42(false);
      //Serial.println("Reading Data");
      memset(buffer, 0, 2048);
      myNAND.readBytes(0, buffer, 16);
    
      for (uint16_t i = 0; i < 16; i++) {
        Serial.printf("0x%02x, ", buffer[i]);
      } Serial.println();
    
      Serial.println();
     
      //Lets try an erase
      //myNAND.deviceErase();  //Erase chip
    
      memset(buffer, 0, 2048);
      for (uint16_t i = 0; i < 2048; i++) buffer[i] = i;
      myNAND.writeBytes(0, buffer, 16);
    
      //Serial.println("Reading Data");
      memset(buffer, 0, 2048);
      myNAND.readBytes(0, buffer, 16);
    
      for (uint16_t i = 0; i < 16; i++) {
        Serial.printf("0x%02x, ", buffer[i]);
      } Serial.println();
    
    
      const uint8_t beefy[] = "DEADBEEFdeadbeef\n";
      //Serial.println("Loading data");
      Dprint( (char *)beefy )
      memset(buffer, 0, 2048);
      for(uint8_t j = 0; j < sizeof(beefy); j++) buffer[j] = beefy[j];
    
      //myNAND.writeBytes(4000, buffer, sizeof(beefy));
    
      //Serial.println("Reading Data");
      memset(buffer, 0, 2048);
      //myNAND.readBytes(4000, buffer, 20);
    /*
      for (uint16_t i = 0; i < sizeof(beefy); i++) {
        Serial.printf("0x%02x[%c], ", buffer[i], buffer[i]);
      } Serial.println();
    */
      //check42(true);
    }
    Ok have some errands to do so will have to try and figure out whats going on. Have no idea why not retained.

  7. #107
    Senior Member+ KurtE's Avatar
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    Looks like the T4.1 still runs now

    Code:
    Begin Init
    
    Found W25N01G Flash Chip
    
        NAND ============================ check42() : COMPARE !!!!
    	 took 4709764 elapsed us
    Good, 	Found 42 in NAND 0x8000000 Times
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 
    
    DEADBEEFdeadbeef
    0x44[D], 0x45[E], 0x41[A], 0x44[D], 0x42[B], 0x45[E], 0x45[E], 0x46[F], 0x64[d], 0x65[e], 0x61[a], 0x64[d], 0x62[b], 0x65[e], 0x65[e], 0x66[f], 0x0a[
    ], 0x00[
    It is interesting that cut and paste only showed this much... Probably the null character killed showing output after that, which I did another paste from...
    Code:
    0x2a, 
    
    0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 
    
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        NAND ========== memory map ======  ====== check42() : WRITE !!!!
    		NAND length 0x8000000 element size of 1
    	 took 5067115 elapsed us
        NAND ============================ check42() : COMPARE !!!!
    	 took 4709798 elapsed us
    Good, 	Found 42 in NAND 0x8000000 Times
    Have not looked much yet at sketch to know if this is good or bad.

    Edit: Note: I was sort of confused as you mention check42, but your dump shows 0x2a I wonder if they are related

  8. #108
    Senior Member+ mjs513's Avatar
    Join Date
    Jul 2014
    Location
    New York
    Posts
    5,371
    That’s good now power off and on and you will get the bad message.

    Yeah got me too at first but 0x2a is 42 decimal . Still don’t know why data isn’t retained.

  9. #109
    Senior Member+ defragster's Avatar
    Join Date
    Feb 2015
    Posts
    11,832
    Indeed a print of 0x0 breaks the output copy paste. I put in an IF() case for altered print somewhere once when it wanted to print zero.

    Not getting time to test/work on this - phone calls and then tax prep time.

    Wondering if data getting lost on power off - or if there is a reset of chip somewhere before setup() on cold start - or if the chip is really not made ready to read until after some later code runs and that persists across warm restarts? i.e. Maybe the check42(false) is too early in setup()?
    > thinking alter check42 to only write half of NAND - then at end of setup() check some value in page over halfway - Print the value found and then if not expected value write it to a known value and then repeat and it should only show wrong value the first time.

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