/
StdioBench.ino
214 lines (193 loc) · 5.32 KB
/
StdioBench.ino
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// Benchmark comparing SdFile and StdioStream.
#include <SPI.h>
#include "SdFat.h"
// Define PRINT_FIELD nonzero to use printField.
#define PRINT_FIELD 0
// Number of lines to list on Serial.
#define STDIO_LIST_COUNT 0
#define VERIFY_CONTENT 0
const uint8_t SD_CS_PIN = SS;
SdFat sd;
SdFile printFile;
StdioStream stdioFile;
float f[100];
char buf[20];
const char* label[] =
{ "uint8_t 0 to 255, 100 times ", "uint16_t 0 to 20000",
"uint32_t 0 to 20000", "uint32_t 1000000000 to 1000010000",
"float nnn.ffff, 10000 times"
};
//------------------------------------------------------------------------------
void setup() {
uint32_t printSize;
uint32_t stdioSize = 0;
uint32_t printTime;
uint32_t stdioTime = 0;
Serial.begin(9600);
while (!Serial) {
SysCall::yield();
}
Serial.println(F("Type any character to start"));
while (!Serial.available()) {
SysCall::yield();
}
Serial.println(F("Starting test"));
// 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(SD_CS_PIN, SD_SCK_MHZ(50))) {
sd.errorHalt();
}
for (uint8_t i = 0; i < 100; i++) {
f[i] = 123.0 + 0.1234*i;
}
for (uint8_t dataType = 0; dataType < 5; dataType++) {
for (uint8_t fileType = 0; fileType < 2; fileType++) {
if (!fileType) {
if (!printFile.open("print.txt", O_RDWR | O_CREAT | O_TRUNC)) {
Serial.println(F("open fail"));
return;
}
printTime = millis();
switch (dataType) {
case 0:
for (uint16_t i =0; i < 100; i++) {
for (uint8_t j = 0; j < 255; j++) {
printFile.println(j);
}
}
break;
case 1:
for (uint16_t i = 0; i < 20000; i++) {
printFile.println(i);
}
break;
case 2:
for (uint32_t i = 0; i < 20000; i++) {
printFile.println(i);
}
break;
case 3:
for (uint16_t i = 0; i < 10000; i++) {
printFile.println(i + 1000000000UL);
}
break;
case 4:
for (int j = 0; j < 100; j++) {
for (uint8_t i = 0; i < 100; i++) {
printFile.println(f[i], 4);
}
}
break;
default:
break;
}
printFile.sync();
printTime = millis() - printTime;
printFile.rewind();
printSize = printFile.fileSize();
} else {
if (!stdioFile.fopen("stream.txt", "w+")) {
Serial.println(F("fopen fail"));
return;
}
stdioTime = millis();
switch (dataType) {
case 0:
for (uint16_t i =0; i < 100; i++) {
for (uint8_t j = 0; j < 255; j++) {
#if PRINT_FIELD
stdioFile.printField(j, '\n');
#else // PRINT_FIELD
stdioFile.println(j);
#endif // PRINT_FIELD
}
}
break;
case 1:
for (uint16_t i = 0; i < 20000; i++) {
#if PRINT_FIELD
stdioFile.printField(i, '\n');
#else // PRINT_FIELD
stdioFile.println(i);
#endif // PRINT_FIELD
}
break;
case 2:
for (uint32_t i = 0; i < 20000; i++) {
#if PRINT_FIELD
stdioFile.printField(i, '\n');
#else // PRINT_FIELD
stdioFile.println(i);
#endif // PRINT_FIELD
}
break;
case 3:
for (uint16_t i = 0; i < 10000; i++) {
uint32_t n = i + 1000000000UL;
#if PRINT_FIELD
stdioFile.printField(n, '\n');
#else // PRINT_FIELD
stdioFile.println(n);
#endif // PRINT_FIELD
}
break;
case 4:
for (int j = 0; j < 100; j++) {
for (uint8_t i = 0; i < 100; i++) {
#if PRINT_FIELD
stdioFile.printField(f[i], '\n', 4);
#else // PRINT_FIELD
stdioFile.println(f[i], 4);
#endif // PRINT_FIELD
}
}
break;
default:
break;
}
stdioFile.fflush();
stdioTime = millis() - stdioTime;
stdioSize = stdioFile.ftell();
if (STDIO_LIST_COUNT) {
size_t len;
stdioFile.rewind();
for (int i = 0; i < STDIO_LIST_COUNT; i++) {
stdioFile.fgets(buf, sizeof(buf), &len);
Serial.print(len);
Serial.print(',');
Serial.print(buf);
}
}
}
}
Serial.println(label[dataType]);
if (VERIFY_CONTENT && printSize == stdioSize) {
printFile.rewind();
stdioFile.rewind();
for (uint32_t i = 0; i < stdioSize; i++) {
if (printFile.read() != stdioFile.getc()) {
Serial.print(F("Files differ at pos: "));
Serial.println(i);
return;
}
}
}
Serial.print(F("fileSize: "));
if (printSize != stdioSize) {
Serial.print(printSize);
Serial.print(F(" != "));
}
Serial.println(stdioSize);
Serial.print(F("print millis: "));
Serial.println(printTime);
Serial.print(F("stdio millis: "));
Serial.println(stdioTime);
Serial.print(F("ratio: "));
Serial.println((float)printTime/(float)stdioTime);
Serial.println();
printFile.close();
stdioFile.fclose();
}
Serial.println(F("Done"));
}
void loop() {}