agdl
commented
8 years ago From @shiftleftplusone on September 12, 2015 15:34
I made it similar, providing a dedicated SDinit() function and aborting after 20 sec timeout:
#define fileIO_OK +1
#define fileIO_NO_ERR 0
#define fileIO_ERR_CREATE -1
#define fileIO_ERR_OPEN -2
#define fileIO_ERR_REMOVE -3
#define fileIO_ERR_WRITE -4
#define fileIO_ERR_READ -5
#define fileIO_ERR_IMPLAUS -6
#define fileIO_ERR_NAME -8
#define fileIO_ERR_SDCARD -16
#define sd_cs 4
//=====================================================================================
// SD init
//=====================================================================================
int16_t SDinit() {
char sbuf[50];
uint32_t tstamp;
int16_t ior=0;
pinMode(13, OUTPUT);
digitalWrite(13, LOW);
tstamp = millis();
ior=SD.begin(sd_cs); // true on sucess; else false
while( !ior) {
sprintf(sbuf, "#: ...SD not found... "); Serial.println(sbuf);
delay(1000);
ior=SD.begin(sd_cs);
if (millis()-tstamp>20000) {Serial.println("#: ...break!"); break; }
}
if(!ior) return fileIO_ERR_SDCARD; // SD ioresult == 0
digitalWrite(13, HIGH);
return fileIO_OK ; // SD init OK == 1
}
From @maxcpr on August 18, 2015 18:2
a little bit changed example from IDE (SD listfiles), file listing moved to "loop". Code stops listing microSD card after 17-20 loops (arduino nano). (there is similar code, also listing files on microsd, that works fine on the same hardware)
Copied from original issue: arduino/Arduino#3696