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99 lines
2.3 KiB
99 lines
2.3 KiB
5 years ago
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/*
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* This sketch will remove the files and directories
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* created by the SdFatMakeDir.pde sketch.
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*
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* Performance is erratic due to the large number
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* of flash erase operations caused by many random
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* writes to file structures.
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*/
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#include <SdFs.h>
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const uint8_t SD_CHIP_SELECT = SS;
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SdFat sd;
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typedef File file_t;
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// store error strings in flash to save RAM
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#define error(s) sd.errorHalt(&Serial, F(s))
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/*
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* remove all files in dir.
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*/
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void deleteFiles(FatFile* dir) {
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char name[32];
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file_t file;
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// open and delete files
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for (uint16_t n = 0; ; n++){
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sprintf(name, "%u.TXT", n);
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// open start time
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uint32_t t0 = millis();
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// assume done if open fails
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if (!file.open(dir, name, O_WRITE)) return;
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// open end time and remove start time
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uint32_t t1 = millis();
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if (!file.remove()) error("file.remove failed");
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// remove end time
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uint32_t t2 = millis();
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Serial.print(F("RM "));
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Serial.print(n);
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Serial.write(' ');
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// open time
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Serial.print(t1 - t0);
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Serial.write(' ');
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// remove time
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Serial.println(t2 - t1);
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}
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}
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void setup() {
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file_t root;
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Serial.begin(9600);
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while (!Serial) {} // wait for Leonardo
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Serial.println(F("Type any character to start"));
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while (Serial.read() <= 0) {}
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delay(200); // Catch Due reset problem
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// initialize the SD card at SPI_FULL_SPEED for best performance.
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// try SPI_HALF_SPEED if bus errors occur.
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if (!sd.begin(SD_CHIP_SELECT, SPI_FULL_SPEED)) {
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sd.initErrorHalt(&Serial);
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}
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root.openRoot(&sd);
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// delete files in root if not FAT16.
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if (sd.fatType() != 16) {
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Serial.println(F("Remove files in root"));
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deleteFiles(&root);
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}
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// open SUB1 and delete files
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file_t sub1;
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if (!sub1.open("SUB1", O_READ)) error("open SUB1 failed");
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Serial.println(F("Remove files in SUB1"));
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deleteFiles(&sub1);
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// open SUB2 and delete files
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file_t sub2;
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if (!sub2.open(&sub1, "SUB2", O_READ)) error("open SUB2 failed");
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Serial.println(F("Remove files in SUB2"));
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deleteFiles(&sub2);
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// remove SUB2
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if (!sub2.rmdir()) error("sub2.rmdir failed");
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Serial.println(F("SUB2 removed"));
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// remove SUB1
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if (!sub1.rmdir()) error("sub1.rmdir failed");
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Serial.println(F("SUB1 removed"));
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Serial.println(F("Done"));
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}
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void loop() { }
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