{"id":511,"date":"2024-03-30T22:53:12","date_gmt":"2024-03-30T14:53:12","guid":{"rendered":"https:\/\/3dok.biz\/wordpress\/?p=511"},"modified":"2024-04-01T13:06:22","modified_gmt":"2024-04-01T05:06:22","slug":"esp32-%e8%88%87-winbond-w25q128jv-%e4%b8%b2%e5%88%97%e5%bf%ab%e9%96%83%e8%a8%98%e6%86%b6%e9%ab%94","status":"publish","type":"post","link":"https:\/\/3dok.biz\/wordpress\/?p=511","title":{"rendered":"Esp32 \u8207 Winbond W25Q128JV \u4e32\u5217\u5feb\u9583\u8a18\u61b6\u9ad4"},"content":{"rendered":"\t\t
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<\/p>\n

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

<\/p>\n


<\/span><\/p>

\u900f\u904e\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff08\u5728\u8a0a\u606f\u672b\u5c3e\u65b0\u589e\uff09\uff0c\u5b83\u53ef\u4ee5\u5728 Arduino Nano IoT 33 \u4e0a\u6b63\u5e38\u5de5\u4f5c\uff0c\u4f46\u5728 esp32 \u4e0a\u6211\u770b\u4e0d\u5230\u6a94\u6848\u6216\u5beb\u5165\u4efb\u4f55\u5167\u5bb9\u5230\u6676\u7247\u3002<\/span>
\u7576\u50b3\u56de\u80fd\u5920\u5beb\u5165\u7684 maxfiles \u70ba 0 \u6642\uff0cSerialFlash.create() \u51fd\u6578\u4f3c\u4e4e\u5931\u6557\u4e86\u3002<\/span>
\u6709\u4ec0\u9ebc\u60f3\u6cd5\u55ce\uff1f<\/span>
\u8b1d\u8b1d<\/span>
\u9019\u662f\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff1a<\/span><\/p>\n

<\/p>\n


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

const int FlashChipSelect = 4;

void setup(){

  Serial.begin(115200);
  delay(3000);
  Serial.println(“SPI Flash”);
 
  if (!SerialFlash.begin(FlashChipSelect)) {
    Serial.println(“Unable to access SPI Flash chip”);
    while(1){}
  }
 
}

void loop(){

  \/\/ MAIN MENU
  Serial.println(“”);
  Serial.println(“”);
  Serial.println(“SerialFlash Read and Write”);
  Serial.println(“(switch your terminal to no line endings)”);
  Serial.println(“————————–“);
  Serial.println(“1) Create a new file”);
  Serial.println(“2) Open a file”);
  Serial.println(“3) Delete a file”);
  Serial.println(“————————–“);
  Serial.println(“Select a number”);
  while(!Serial.available()){}
  char choice = Serial.read();
  while(Serial.available()){Serial.read();}

  switch(choice){

    case ‘1’:
      newFile();
      break;

    case ‘2’:
      openFile();
      break;

    case ‘3’:
      deleteFile();
      break;

    default:
      Serial.println(“Invalid Selection”);
    
  }
 
}

\/* Create a new file
 *
 * Request filename up to 20 chars
 * Request a size up to 256 bytes
 * Request some contents
 * Create a file
 *\/
void newFile(){

  Serial.println(“Enter a filename”); \/\/ Request filename from user
  while(!Serial.available()){} \/\/ Wait for user

  char filename[20] = {}; \/\/ buffer to store user filename
  Serial.readBytesUntil(‘ ‘, filename, 20);
  while(Serial.available()){Serial.read();}

  Serial.println(“Enter a filesize in bytes”); \/\/ Request file size from user
  while(!Serial.available()){} \/\/ Wait for user

  char sizeArray[3] = {}; \/\/ buffer to store requested file size
  Serial.readBytesUntil(‘ ‘, sizeArray, 3);
  while(Serial.available()){Serial.read();}
  int filesize = atoi(sizeArray); \/\/ Convert char array to int (i.e. “40” to 40)

  if(SerialFlash.create(filename, filesize)){ \/\/ Returns false if file already exists

    SerialFlashFile file; \/\/ Open the file we just created for writing
    file = SerialFlash.open(filename);
    Serial.println(“Write some file contents:”); \/\/ Request file contents from user
    while(!Serial.available()){} \/\/ Wait for user

    char contents[256] = {}; \/\/ buffer to store file contents
    Serial.readBytesUntil(255, contents, 256);
    while(Serial.available()){Serial.read();} \/\/ Empty read buffer
    file.write(contents, filesize); \/\/ Write the contents buffer
    Serial.println(“”);
    Serial.print(“New file “);
    Serial.print(filename);
    Serial.print(” created with size “);
    Serial.print(filesize);
    Serial.println(” bytes!”);
  }else{
    Serial.println(“”);
    Serial.println(“There was an error creating this file (does it already exist?)”);
  }

  return;
 
}

\/* Open a file
 *
 * Print the directory listing
 * Request filename up to 20 chars
 * Open file and display contents
 *\/
void openFile(){

  printDir(); \/\/ Function to print the directory listing

  Serial.println(“Enter a filename to OPEN”); \/\/ Request file name from user
  Serial.println();
  while(!Serial.available()){} \/\/ Wait for user

  char filename[20] = {}; \/\/ buffer to store the file name
  Serial.readBytesUntil(‘ ‘, filename, 20);
  while(Serial.available()){Serial.read();}

  Serial.println(filename);

  SerialFlashFile file;
  file = SerialFlash.open(filename); \/\/ open the file
  if (file) {
    Serial.print(“File Name: “);
    Serial.println(filename);
    Serial.println();
    Serial.print(“File Size: “);
    Serial.print(file.size());
    Serial.println(” bytes”);
    Serial.println();
    Serial.println(“File Contents:”);
    char buffer[256] = {}; \/\/ create a buffer for the file contents
    file.read(buffer, 256); \/\/ read file to buffer
    Serial.print(buffer);
  }else{
    Serial.println(“File not found!”);
  }

  return;
 
}

\/* Delete a file
 *
 * Print the directory listing
 * Request filename up to 20 chars
 * Delete File
 *\/
void deleteFile(){

  printDir(); \/\/ Function to print the directory listing

  Serial.println(“Enter a filename to DELETE”); \/\/ Request file name from user
  while(!Serial.available()){} \/\/ Wait for user

  char filename[20] = {}; \/\/ buffer to store file name
  Serial.readBytesUntil(‘ ‘, filename, 20);
  while(Serial.available()){Serial.read();}

  SerialFlash.remove(filename); \/\/ Delete the file

  return;
 
}

\/* Print Directory
 *
 * Print a list of all files on the chip
 * Stolen from SerialFlash library example “ListFiles”
 *\/
void printDir(){

  Serial.println(“Directory Listing”);
  Serial.println(“—————–“);

  SerialFlash.opendir();
  while (1) {
    char filename[64];
    uint32_t filesize;

    if (SerialFlash.readdir(filename, sizeof(filename), filesize)) {
      Serial.print(”  “);
      Serial.print(filename);
      spaces(20 – strlen(filename));
      Serial.print(”  “);
      Serial.print(filesize);
      Serial.print(” bytes”);
      Serial.println();
    } else {
      break; \/\/ no more files
    }
  }
}

void spaces(int num) {
  for (int i=0; i < num; i++) {
    Serial.print(” “);
  }
}<\/span><\/p>\n

—————————————————————————————————————-
<\/span><\/p>\n

<\/p>\n

\u4e0d\uff0c\u5982\u679c\u8a72\u7a0b\u5f0f\u5eab\u53ea\u662f\u4f7f\u7528 Arduino IDE \u652f\u63f4\u7684\u6240\u6709\u5e73\u53f0\u7684\u901a\u7528\u529f\u80fd\u7de8\u5beb\u7684\uff0c\u90a3\u9ebc\u9019\u61c9\u8a72\u4e0d\u662f\u554f\u984c\u3002\u6211\u731c\u4f60\u6aa2\u67e5\u4e86\u986f\u800c\u6613\u898b\u7684\u4e8b\u60c5\uff1a\u6c92\u6709\u4f7f\u7528\u8207 Nano IoT 33 \u76f8\u540c\u7684\u6587\u4ef6\u540d\uff0c\u6c92\u6709\u5728\u4e4b\u524d\u7684\u5beb\u5165\u4e2d\u586b\u5145\u5b8c\u6574\u7684\u6676\u7247\uff0c\u7b49\u7b49\u3002\u5982\u679c\u4f60……<\/p>\n

\u611f\u8b1d\u60a8\u7684\u56de\u590d\uff0c\u63a5\u7dda\u662f\uff1a<\/span>
ESP32 W25Q128JV<\/span>
3V3 ——–> 3.3V<\/span>
PIN4 ——–> CS<\/span>
PIN18 ——–> CLK<\/span>
PIN23 — ——> DI<\/span>
PIN19 ——–> DO<\/span>
3V3 ——–> WP<\/span>
3V3 ——–> \u4fdd\u6301<\/span>
\u63a5\u5730 ——– > GND<\/span>
\u8a72\u51fd\u5f0f\u5eab\u662f\u70ba arduino \u7de8\u5beb\u7684\uff0c\u9019\u4e0d\u6703\u9020\u6210\u554f\u984c\u55ce\uff1f<\/span>
\u8b1d\u8b1d\uff01<\/span><\/p>\n

—————————————————————————————————————-<\/span><\/p>\n

<\/p>\n

SPI \u532f\u6d41\u6392\u8a2d\u8a08\u7528\u65bc\u9023\u63a5\u8f03\u77ed\u7684 PCB\u3002\u6839\u64da\u6211\u7684\u7d93\u9a57\uff0c\u53ea\u8981\u6c92\u6709\u66f4\u5927\u7684\u96fb\u566a\u8072\u6e90\uff08pe \u99ac\u9054\uff09\u6c61\u67d3\u74b0\u5883\uff0cSPI \u983b\u7387\u9ad8\u9054 4MHz \u5de6\u53f3\u7684\u9eb5\u5305\u677f\u8a2d\u5b9a\u5c31\u53ef\u4ee5\u975e\u5e38\u53ef\u9760\u5730\u5de5\u4f5c\u3002\u60a8\u53ef\u80fd\u6703\u4ee5\u66f4\u9ad8\u7684\u983b\u7387\u53d6\u5f97\u6210\u529f\uff0c\u4f46\u9019\u53ef\u80fd\u53ea\u662f\u904b\u6c23\u3002<\/span>
ESP\uff08\u901a\u5e38\uff0c\u60a8\u6c92\u6709\u544a\u8a34\u6211\u5011\u60a8\u4f7f\u7528\u7684\u7279\u5b9a\u578b\u865f\uff09\u904b\u884c\u5728 240MHz \u4e0a\u3002 SPI\u983b\u7387\u9ad8\u905450MHz\uff0c\u8d85\u904eNano ioT 33\u7684\u8655\u7406\u5668\u6642\u8108\uff0848MHz\uff09\u3002<\/span><\/p>\n

—————————————————————————————————————-<\/span><\/p>\n

<\/p>\n

\u6211\u5efa\u8b70\u5728\u9eb5\u5305\u677f\u8a2d\u5b9a\u4e0a\u4fdd\u6301\u5728 4MHz \u6216\u4ee5\u4e0b\uff08\u5047\u8a2d\u60a8\u4f7f\u7528\u9ad8\u54c1\u8cea\u7684\u9eb5\u5305\u677f\uff09\u3002<\/span>
\u5728 PCB \u4e0a\uff0c\u60a8\u53ef\u80fd\u6703\u8d70\u5f97\u66f4\u9ad8\uff0c\u5982\u679c\u60a8\u6b63\u78ba\u9032\u884c\u8d70\u7dda\u4f48\u7dda\uff0c50 MHz \u61c9\u8a72\u4e0d\u662f\u554f\u984c\u3002<\/span><\/p>\n

<\/p>\n

\u591a\u8b1d\uff01\u6211\u6539\u6210 20Mhz\uff0c\u5728\u9eb5\u5305\u677f\u4e0a\u904b\u4f5c\u5f97\u5f88\u597d\u3002<\/p>\n

<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

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