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- /*
- * This program is a simple Print benchmark.
- */
- #include <SPI.h>
- #include "SdFat.h"
- #include "sdios.h"
- #include "FreeStack.h"
- // SD chip select pin
- const uint8_t chipSelect = SS;
- // number of lines to print
- const uint16_t N_PRINT = 20000;
- // file system
- SdFat sd;
- // test file
- SdFile file;
- // Serial output stream
- ArduinoOutStream cout(Serial);
- //------------------------------------------------------------------------------
- // store error strings in flash to save RAM
- #define error(s) sd.errorHalt(F(s))
- //------------------------------------------------------------------------------
- void setup() {
- Serial.begin(9600);
- // Wait for USB Serial
- while (!Serial) {
- yield();
- }
- }
- //------------------------------------------------------------------------------
- void loop() {
- uint32_t maxLatency;
- uint32_t minLatency;
- uint32_t totalLatency;
- // Read any existing Serial data.
- do {
- delay(10);
- } while (Serial.available() && Serial.read() >= 0);
- // F stores strings in flash to save RAM
- cout << F("Type any character to start\n");
- while (!Serial.available()) {
- yield();
- }
- delay(400); // catch Due reset problem
- cout << F("FreeStack: ") << FreeStack() << endl;
- // Initialize at the highest speed supported by the board that is
- // not over 50 MHz. Try a lower speed if SPI errors occur.
- if (!sd.begin(chipSelect, SD_SCK_MHZ(50))) {
- sd.initErrorHalt();
- }
- cout << F("Type is FAT") << int(sd.vol()->fatType()) << endl;
- cout << F("Starting print test. Please wait.\n\n");
- // do write test
- for (int test = 0; test < 6; test++) {
- char fileName[13] = "bench0.txt";
- fileName[5] = '0' + test;
- // open or create file - truncate existing file.
- if (!file.open(fileName, O_RDWR | O_CREAT | O_TRUNC)) {
- error("open failed");
- }
- maxLatency = 0;
- minLatency = 999999;
- totalLatency = 0;
- switch(test) {
- case 0:
- cout << F("Test of println(uint16_t)\n");
- break;
- case 1:
- cout << F("Test of printField(uint16_t, char)\n");
- break;
- case 2:
- cout << F("Test of println(uint32_t)\n");
- break;
- case 3:
- cout << F("Test of printField(uint32_t, char)\n");
- break;
- case 4:
- cout << F("Test of println(float)\n");
- break;
- case 5:
- cout << F("Test of printField(float, char)\n");
- break;
- }
- uint32_t t = millis();
- for (uint16_t i = 0; i < N_PRINT; i++) {
- uint32_t m = micros();
- switch(test) {
- case 0:
- file.println(i);
- break;
- case 1:
- file.printField(i, '\n');
- break;
- case 2:
- file.println(12345678UL + i);
- break;
- case 3:
- file.printField(12345678UL + i, '\n');
- break;
- case 4:
- file.println((float)0.01*i);
- break;
- case 5:
- file.printField((float)0.01*i, '\n');
- break;
- }
- if (file.getWriteError()) {
- error("write failed");
- }
- m = micros() - m;
- if (maxLatency < m) {
- maxLatency = m;
- }
- if (minLatency > m) {
- minLatency = m;
- }
- totalLatency += m;
- }
- file.close();
- t = millis() - t;
- double s = file.fileSize();
- cout << F("Time ") << 0.001*t << F(" sec\n");
- cout << F("File size ") << 0.001*s << F(" KB\n");
- cout << F("Write ") << s/t << F(" KB/sec\n");
- cout << F("Maximum latency: ") << maxLatency;
- cout << F(" usec, Minimum Latency: ") << minLatency;
- cout << F(" usec, Avg Latency: ");
- cout << totalLatency/N_PRINT << F(" usec\n\n");
- }
- cout << F("Done!\n\n");
- }
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