{"id":500,"date":"2024-03-30T22:11:04","date_gmt":"2024-03-30T14:11:04","guid":{"rendered":"https:\/\/3dok.biz\/wordpress\/?p=500"},"modified":"2024-04-01T13:05:31","modified_gmt":"2024-04-01T05:05:31","slug":"arduino-esp32-and-winbond-w25q128jv-serial-flash-memory","status":"publish","type":"post","link":"https:\/\/3dok.biz\/wordpress\/?p=500","title":{"rendered":"Arduino: Esp32 and Winbond W25Q128JV serial flash memory"},"content":{"rendered":"\t\t
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With an example code(added at the end of message), It works fine with Arduino Nano IoT 33, but with esp32 I can’t see the files or write anything to the chip.
It seems to fail on SerialFlash.create() function when returning maxfiles able to write as 0.
Any idea?
Thanks
This is the example code:<\/p>

————————————–<\/p>

https:\/\/forum.arduino.cc\/t\/esp32-and-winbond-w25q128jv-serial-flash-memory\/861315<\/a><\/p>

#include <SerialFlash.h>\n#include <SPI.h>\n\nconst int FlashChipSelect = 4; \n\nvoid setup(){\n\n  Serial.begin(115200);\n  delay(3000);\n  Serial.println(\"SPI Flash\");\n  \n  if (!SerialFlash.begin(FlashChipSelect)) {\n    Serial.println(\"Unable to access SPI Flash chip\");\n    while(1){}\n  }\n  \n}\n\nvoid loop(){\n\n  \/\/ MAIN MENU\n  Serial.println(\"\");\n  Serial.println(\"\");\n  Serial.println(\"SerialFlash Read and Write\");\n  Serial.println(\"(switch your terminal to no line endings)\");\n  Serial.println(\"--------------------------\");\n  Serial.println(\"1) Create a new file\");\n  Serial.println(\"2) Open a file\");\n  Serial.println(\"3) Delete a file\");\n  Serial.println(\"--------------------------\");\n  Serial.println(\"Select a number\");\n  while(!Serial.available()){}\n  char choice = Serial.read();\n  while(Serial.available()){Serial.read();}\n\n  switch(choice){\n\n    case '1':\n      newFile();\n      break;\n\n    case '2':\n      openFile();\n      break;\n\n    case '3':\n      deleteFile();\n      break;\n\n    default:\n      Serial.println(\"Invalid Selection\");\n    \n  }\n  \n}\n\n\/* Create a new file\n * \n * Request filename up to 20 chars\n * Request a size up to 256 bytes\n * Request some contents\n * Create a file\n *\/\nvoid newFile(){\n\n  Serial.println(\"Enter a filename\"); \/\/ Request filename from user\n  while(!Serial.available()){} \/\/ Wait for user\n\n  char filename[20] = {}; \/\/ buffer to store user filename\n  Serial.readBytesUntil(' ', filename, 20);\n  while(Serial.available()){Serial.read();}\n\n  Serial.println(\"Enter a filesize in bytes\"); \/\/ Request file size from user\n  while(!Serial.available()){} \/\/ Wait for user\n\n  char sizeArray[3] = {}; \/\/ buffer to store requested file size\n  Serial.readBytesUntil(' ', sizeArray, 3);\n  while(Serial.available()){Serial.read();}\n  int filesize = atoi(sizeArray); \/\/ Convert char array to int (i.e. \"40\" to 40) \n\n  if(SerialFlash.create(filename, filesize)){ \/\/ Returns false if file already exists\n\n    SerialFlashFile file; \/\/ Open the file we just created for writing\n    file = SerialFlash.open(filename);\n    Serial.println(\"Write some file contents:\"); \/\/ Request file contents from user\n    while(!Serial.available()){} \/\/ Wait for user\n\n    char contents[256] = {}; \/\/ buffer to store file contents\n    Serial.readBytesUntil(255, contents, 256);\n    while(Serial.available()){Serial.read();} \/\/ Empty read buffer\n    file.write(contents, filesize); \/\/ Write the contents buffer\n    Serial.println(\"\");\n    Serial.print(\"New file \");\n    Serial.print(filename);\n    Serial.print(\" created with size \");\n    Serial.print(filesize);\n    Serial.println(\" bytes!\");\n  }else{\n    Serial.println(\"\");\n    Serial.println(\"There was an error creating this file (does it already exist?)\");\n  }\n\n  return;\n  \n}\n\n\/* Open a file\n * \n * Print the directory listing\n * Request filename up to 20 chars\n * Open file and display contents\n *\/\nvoid openFile(){\n\n  printDir(); \/\/ Function to print the directory listing\n\n  Serial.println(\"Enter a filename to OPEN\"); \/\/ Request file name from user\n  Serial.println();\n  while(!Serial.available()){} \/\/ Wait for user\n\n  char filename[20] = {}; \/\/ buffer to store the file name\n  Serial.readBytesUntil(' ', filename, 20);\n  while(Serial.available()){Serial.read();}\n\n  Serial.println(filename);\n\n  SerialFlashFile file;\n  file = SerialFlash.open(filename); \/\/ open the file\n  if (file) {\n    Serial.print(\"File Name: \");\n    Serial.println(filename);\n    Serial.println();\n    Serial.print(\"File Size: \");\n    Serial.print(file.size());\n    Serial.println(\" bytes\");\n    Serial.println();\n    Serial.println(\"File Contents:\");\n    char buffer[256] = {}; \/\/ create a buffer for the file contents\n    file.read(buffer, 256); \/\/ read file to buffer\n    Serial.print(buffer);\n  }else{\n    Serial.println(\"File not found!\");\n  }\n\n  return;\n  \n}\n\n\/* Delete a file\n * \n * Print the directory listing\n * Request filename up to 20 chars\n * Delete File\n *\/\nvoid deleteFile(){\n\n  printDir(); \/\/ Function to print the directory listing\n\n  Serial.println(\"Enter a filename to DELETE\"); \/\/ Request file name from user \n  while(!Serial.available()){} \/\/ Wait for user\n\n  char filename[20] = {}; \/\/ buffer to store file name\n  Serial.readBytesUntil(' ', filename, 20);\n  while(Serial.available()){Serial.read();}\n\n  SerialFlash.remove(filename); \/\/ Delete the file\n\n  return;\n  \n}\n\n\/* Print Directory\n * \n * Print a list of all files on the chip\n * Stolen from SerialFlash library example \"ListFiles\"\n *\/\nvoid printDir(){\n\n  Serial.println(\"Directory Listing\");\n  Serial.println(\"-----------------\");\n\n  SerialFlash.opendir();\n  while (1) {\n    char filename[64];\n    uint32_t filesize;\n\n    if (SerialFlash.readdir(filename, sizeof(filename), filesize)) {\n      Serial.print(\"  \");\n      Serial.print(filename);\n      spaces(20 - strlen(filename));\n      Serial.print(\"  \");\n      Serial.print(filesize);\n      Serial.print(\" bytes\");\n      Serial.println();\n    } else {\n      break; \/\/ no more files\n    }\n  }\n}\n\nvoid spaces(int num) {\n  for (int i=0; i < num; i++) {\n    Serial.print(\" \");\n  }\n}\n<\/code><\/pre><\/div>
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