SPIMemory library - Formerly SPIFlash - now supports SPI FRAM as well! :)

Using Arduino Storage
153

Hi, Im using ESP8266, then executing flash.begin() and without spi flash connected ... >> getting WDT reset. I cant add delay(0) ... is in your library ...

... with spi flash inserted (connected) - all ok.

  ESP.wdtDisable();
  ESP.wdtFeed();

  if (!flash.begin()) {
    Serial.println(flash.error(VERBOSE));
  }

  ESP.wdtEnable(1000);

same with wdtDisable() after ~10 seconds WDT reset .... your library stack in infinite loop on flash.begin() .... any help ?

OK ... find the bug, in defines.h change ... for esp8266 BUSY_TIMEOUT set ~2 seconds (was 1000 seconds)

// #define BUSY_TIMEOUT  1000000000L
#if defined (ARDUINO_ARCH_ESP8266)
#define BUSY_TIMEOUT  2000000L
#else
#define BUSY_TIMEOUT  1000000000L
#endif

... now work ok

and may be in this code must be done some fixes:

// Polls the status register 1 until busy flag is cleared or timeout
 bool SPIFlash::_notBusy(uint32_t timeout) {
   _delay_us(WINBOND_WRITE_DELAY);
   uint32_t _time = micros();

   do {
     #if defined (ARDUINO_ARCH_ESP8266)
     delay(0);
     #endif
     _readStat1();
     if (!(stat1 & BUSY))
     {
       return true;
     }

   } while ((micros() - _time) < timeout);
   if (timeout <= (micros() - _time)) {
     _troubleshoot(CHIPBUSY);
     return false;
   }
   return true;
 }

change code >

do {
** #if defined (ARDUINO_ARCH_ESP8266)**
** delay(0);**
** #endif**
** _readStat1();**

same with cheapErase() fix

//Erases whole chip. Think twice before using.
bool SPIFlash::eraseChip(void) {
  #ifdef RUNDIAGNOSTIC
    _spifuncruntime = micros();
  #endif
 if(_isChipPoweredDown() || !_notBusy() || !_writeEnable()) {
    return false;
  }

 _beginSPI(chipErase.opcode);
  _endSPI();

 while(_readStat1() & BUSY) {
  #if defined (ARDUINO_ARCH_ESP8266)
     delay(0);
  #endif
    //_delay_us(30000L);
  }
  _endSPI();

  #ifdef RUNDIAGNOSTIC
    _spifuncruntime = micros() - _spifuncruntime;
  #endif
 return true;

}