Code:
#include "FS.h"
#include "SD.h"
#include "SD_MMC.h"
#define BOARD_HAS_1BIT_SDMMC
void WriteFile(fs::FS &fs, const char *path, uint8_t *buf, int len)
{
//unsigned long start_time = millis();
Serial.printf("write [%s]...\n", path);
File file = fs.open(path, FILE_WRITE);
if (!file) {
Serial.println("Failed to open file for writing");
return;
}
if (!file.write(buf, len)) {
Serial.println("Write failed");
return;
}
file.flush();
file.close();
Serial.printf("Write [%s] Complete", path);
}
void ReadFile(fs::FS &fs, const char *path, uint8_t *buf, int len)
{
Serial.printf("read [%s]...\n", path);
File file = fs.open(path);
if (!file) {
Serial.println("Failed to open file for reading");
return;
}
if (!file.read(buf, len)) {
Serial.println("Read failed");
return;
}
file.close();
Serial.printf("Read [%s] Complete: %s", path, buf);
}
void testIO(fs::FS &fs)
{
char buf[] = "hello world";
WriteFile(fs, "/test.txt", (uint8_t *)buf, strlen(buf));
ReadFile(fs, "/test.txt", (uint8_t *)buf, strlen(buf));
}
void setup() {
pinMode(2,INPUT_PULLUP);
// put your setup code here, to run once:
Serial.begin(115200);
Serial.println("Please insert SD card");
delay(1000);
/* SD_MMC 1-bit Mode */
if (!SD_MMC.begin("/cdcard", true)) {
Serial.println("Card Mount Failed");
return;
}
testIO(SD_MMC);
SD_MMC.end(); // cancel SD card mount
}
void loop() {
}
![[Image: KC868-M16-1_01.jpg]](https://www.kincony.com/images/KC868-M16/KC868-M16-1_01.jpg)
![[Image: KC868-M16-1_02.jpg]](https://www.kincony.com/images/KC868-M16/KC868-M16-1_02.jpg)
![[Image: KC868-M16-1_03.jpg]](https://www.kincony.com/images/KC868-M16/KC868-M16-1_03.jpg)
![[Image: KC868-M16-1_04.jpg]](https://www.kincony.com/images/KC868-M16/KC868-M16-1_04.jpg)
