("rmdir failed");}}voidreadFile(fs::FS&fs,constchar*path){Serial.printf("Reading file: %sn",path);File file=fs.open(path);if(!file){Serial.println("Failed to open file for reading");return;}Serial.print("Read from file: ");while(file.available()){Serial.write(file.read());}...
其中标明了示例的SPI引脚为MOSI - pin 11,MISO - pin 12,CLK - pin 13,CS - pin 4,其中片选脚CS备注是连接SD卡片选脚,注释的SPI引脚明显是UNO的SPI,然后接了UNO,确实,对SD卡的读写成功 示例中没有对SPI引脚做定义的地方,只有开头注释说明了连接的SPI对应引脚,所以我找到库函数定义去了,将SPI库和SD库看...
// re-open the file for reading:myFile = SD.open("test.txt");if (myFile) { 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()); ...
// 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()) ...
// string to hold the text from server String tweet = ""; // string to hold the tweet boolean readingTweet = false; // if you're currently reading the tweet void setup() { pinMode(2, OUTPUT); // reserve space for the strings: currentLine.reserve(256); tweet.reserve(150); ...
/* Reading input device (simulated encoder here) */ bool read_encoder(lv_indev_drv_t * indev, lv_indev_data_t * data) { static int32_t last_diff = 0; int32_t diff = 0; /* Dummy - no movement */ int btn_state = LV_INDEV_STATE_REL; /* Dummy - no press */ ...
This is the SD card breakout I am using: https://www.sparkfun.com/products/13743. There are plenty of examples and helpful functions written to access data on the SD card for programming through the Arduino IDE. So, I can see a path to complete my project that way, BUT, I want to...
// string to hold the text from server String tweet = ""; // string to hold the tweet boolean readingTweet = false; // if you're currently reading the tweet void setup() { pinMode(2, OUTPUT); // reserve space for the strings: currentLine.reserve(256); tweet.reserve(150); ...
lcd.print(ratio, 5); lcd.print(" "); lcd.print(avgBVal); // wait 10 milliseconds before the next loop // for the analog-to-digital converter to settle // after the last reading: delay(10); } Happy hacking. Send feedback on this tutorialhere....