STM32G070-platformio+Arduino-SPI接口SD卡使用

在Arduino平台上使用Platformio来使用SD卡，这里使用STM32开发板为例；

1. 建立工程

• 从模版建立工程

从仓库 https://github.com/makerinchina-iot/MonkeyPi-STM32G070-PIO_Arduino_example.git 下载模版；

• 添加SD库

使用VSCode打开文件夹后，在Platformio的库中搜索sdfat并添加到工程：

或者直接在工程文件夹下 platformio.ini 中添加如下：

lib_deps = greiman/SdFat@^2.3.0

2. 打开SD卡示例

在上面打开的库的界面选择一个Example，这里选择ReadWrite示例：

/**
 * @file main.c
 * @author MonkeyPi (makerinchina.cn)
 * @version 0.01
 * @date 2024-03-31
 *
 * @copyright Copyright (c) 2024
 *
 * @brief
 */

#include <Arduino.h>

/*
  SD card read/write

 This example shows how to read and write data to and from an SD card file
 The circuit:
 * SD card attached to SPI bus as follows:
 ** MOSI - pin 11
 ** MISO - pin 12
 ** CLK - pin 13
 ** CS - pin 10

 created   Nov 2010
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe

 This example code is in the public domain.

 */

 #include <SPI.h>
 //#include <SD.h>
 #include "SdFat.h"
 SdFat SD;
 
 #define SD_CS_PIN SS
 File myFile;
 
 void setup() {

     pinMode(LED_BUILTIN, OUTPUT);

     // Open serial communications and wait for port to open:
     Serial.begin(115200);

     while (!Serial)
     {
         ; // wait for serial port to connect. Needed for native USB port only
     }
 
 
   Serial.print("Initializing SD card...");

   int cnts = 3;
   while (cnts--)
   {
    digitalWrite(LED_BUILTIN, HIGH); 
    delay(500);
    digitalWrite(LED_BUILTIN, LOW);
    delay(500);
   }
   
 
   if (!SD.begin(SD_CS_PIN)) {
     Serial.println("initialization failed!");
     return;
   }
   Serial.println("initialization done.");

   #if 1
 
   // open the file. note that only one file can be open at a time,
   // so you have to close this one before opening another.
   myFile = SD.open("test.txt", FILE_WRITE);
 
   // if the file opened okay, write to it:
   if (myFile) {
     Serial.print("Writing to test.txt...");
     myFile.println("testing 1, 2, 3.");
     // close the file:
     myFile.close();
     Serial.println("done.");
   } else {
     // if the file didn't open, print an error:
     Serial.println("error opening test.txt");
   }
 
   // re-open the file for reading:
   myFile = SD.open("test.txt");
   if (myFile) {
     Serial.println("test.txt:");
 
     // read from the file until there's nothing else in it:
     while (myFile.available()) {
       Serial.write(myFile.read());
     }
     // close the file:
     myFile.close();
   } else {
     // if the file didn't open, print an error:
     Serial.println("error opening test.txt");
   }
   #endif
 }
 
 void loop() {
   // nothing happens after setup
 }

3. 硬件连接

这里使用的MonkeyPi-STM32G070RB开发板，因此需要按照Arduino引脚对应到STM32的SPI脚：

4. 运行结果

烧录到开发板后，可以看到串口输出日志：