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88 lines
2.1 KiB
88 lines
2.1 KiB
5 years ago
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#include "SdFs.h"
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#ifdef __AVR__
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const uint32_t FILE_SIZE_MiB = 10UL;
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#else // __AVR__
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const uint32_t FILE_SIZE_MiB = 100UL;
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#endif
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bool waitBusy = true;
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#define SD_CONFIG SdSpiConfig(SS, DEDICATED_SPI)
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// Config for Teensy 3.5/3.6 buit-in SD.
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//#define SD_CONFIG SdSpiConfig(SDCARD_SS_PIN, DEDICATED_SPI)
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//#define SD_CONFIG SdioConfig(FIFO_SDIO)
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//------------------------------------------------------------------------------
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const uint64_t FILE_SIZE = (uint64_t)FILE_SIZE_MiB << 20;
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SdExFat sd;
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ExFile file;
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uint8_t buf[512];
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#define error(s) sd.errorHalt(F(s))
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//------------------------------------------------------------------------------
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void setup() {
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Serial.begin(9600);
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// Wait for USB Serial
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while (!Serial) {
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SysCall::yield();
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}
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delay(1000);
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Serial.println(F("Type any character to start\n"));
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while (!Serial.available()) {
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SysCall::yield();
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}
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// Initialize the SD card.
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if (!sd.begin(SD_CONFIG)) {
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sd.initErrorHalt();
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}
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if (!file.open("SdBusyTest.bin", O_CREAT |O_TRUNC |O_RDWR)) {
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error("file open failed");
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}
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if (!file.preAllocate(FILE_SIZE)) {
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error("preallocate failed");
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}
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Serial.print(F("Starting write of "));
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Serial.print(FILE_SIZE_MiB);
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Serial.println(F(" MiB."));
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uint32_t maxMicros = 0;
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uint32_t minMicros = 99999999;
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uint32_t ms = millis();
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// Write a dummy sector to start a multi-sector write.
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if(file.write(buf, sizeof(buf)) != sizeof(buf)) {
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error("write failed for first sector");
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}
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while (file.position() < FILE_SIZE) {
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if (waitBusy) {
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while (sd.card()->isBusy()) {}
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}
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uint32_t m = micros();
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if (file.write(buf, sizeof(buf)) != sizeof(buf)) {
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error("write failed");
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}
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m = micros() - m;
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if (m < minMicros) {
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minMicros = m;
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}
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if (m > maxMicros) {
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maxMicros = m;
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}
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}
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ms = millis() - ms;
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Serial.print(F("minMicros: "));
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Serial.println(minMicros);
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Serial.print(F("maxMicros: "));
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Serial.println(maxMicros);
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Serial.print(1e-3*ms);
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Serial.println(F(" Seconds"));
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Serial.print(1.0*FILE_SIZE/ms);
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Serial.println(F(" KB/sec"));
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}
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void loop() {}
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