Manuel Sanchez / Mbed 2 deprecated KL25_Funciona_SD

Reading Analog Ports and Saving in a micro SD CARD with the KL25z

Dependencies:   SDFileSystem mbed

Fork of SDFileSystem_HelloWorld by Neil Thiessen

main.cpp@12:bd8b17cd6a7b, 2014-08-18 (annotated)

Committer:
neilt6
Date:
Mon Aug 18 15:11:09 2014 +0000
Revision:
12:bd8b17cd6a7b
Parent:
11:2be49b81dc0b
Child:
16:d68a6d4050f2
Updated SDFileSystem library and improved error handling

Who changed what in which revision?

UserRevisionLine numberNew contents of line
neilt6 0:8f2b6eed2a9d 1 #include "mbed.h"
neilt6 0:8f2b6eed2a9d 2 #include "SDFileSystem.h"
neilt6 0:8f2b6eed2a9d 3
neilt6 10:ae649a596123 4 Timer timer;
neilt6 0:8f2b6eed2a9d 5 DigitalIn button(p21, PullUp);
neilt6 11:2be49b81dc0b 6 SDFileSystem sd(p5, p6, p7, p20, "sd", p22, SDFileSystem::SWITCH_NEG_NO, 25000000);
neilt6 10:ae649a596123 7 char buffer[4096];
neilt6 10:ae649a596123 8
neilt6 10:ae649a596123 9 void writeTest()
neilt6 10:ae649a596123 10 {
neilt6 10:ae649a596123 11 //Test write performance by creating a 1MB file
neilt6 10:ae649a596123 12 printf("Testing %iB write performance...", sizeof(buffer));
neilt6 10:ae649a596123 13 FileHandle* file = sd.open("Test File.bin", O_WRONLY | O_CREAT | O_TRUNC);
neilt6 10:ae649a596123 14 if (file != NULL) {
neilt6 10:ae649a596123 15 timer.start();
neilt6 10:ae649a596123 16 for (int i = 0; i < (1048576 / sizeof(buffer)); i++) {
neilt6 10:ae649a596123 17 if (file->write(buffer, sizeof(buffer)) != sizeof(buffer)) {
neilt6 10:ae649a596123 18 timer.stop();
neilt6 10:ae649a596123 19 printf("write error!\n");
neilt6 10:ae649a596123 20 timer.reset();
neilt6 10:ae649a596123 21 return;
neilt6 10:ae649a596123 22 }
neilt6 10:ae649a596123 23 }
neilt6 10:ae649a596123 24 timer.stop();
neilt6 10:ae649a596123 25 if (file->close())
neilt6 10:ae649a596123 26 printf("failed to close file!\n");
neilt6 10:ae649a596123 27 else
neilt6 10:ae649a596123 28 printf("done!\n\tResult: %.2fKB/s\n", 1024 / (timer.read_us() / 1000000.0));
neilt6 10:ae649a596123 29 timer.reset();
neilt6 10:ae649a596123 30 } else {
neilt6 10:ae649a596123 31 printf("failed to create file!\n");
neilt6 10:ae649a596123 32 }
neilt6 10:ae649a596123 33 }
neilt6 10:ae649a596123 34
neilt6 10:ae649a596123 35 void readTest()
neilt6 10:ae649a596123 36 {
neilt6 10:ae649a596123 37 //Test read performance by reading the 1MB file created by writeTest()
neilt6 10:ae649a596123 38 printf("Testing %iB read performance...", sizeof(buffer));
neilt6 10:ae649a596123 39 FileHandle* file = sd.open("Test File.bin", O_RDONLY);
neilt6 10:ae649a596123 40 if (file != NULL) {
neilt6 10:ae649a596123 41 timer.start();
neilt6 12:bd8b17cd6a7b 42 int iterations = 0;
neilt6 12:bd8b17cd6a7b 43 while (file->read(buffer, sizeof(buffer)) == sizeof(buffer))
neilt6 12:bd8b17cd6a7b 44 iterations++;
neilt6 10:ae649a596123 45 timer.stop();
neilt6 12:bd8b17cd6a7b 46 if (iterations != (1048576 / sizeof(buffer)))
neilt6 12:bd8b17cd6a7b 47 printf("read error!\n");
neilt6 12:bd8b17cd6a7b 48 else if (file->close())
neilt6 10:ae649a596123 49 printf("failed to close file!\n");
neilt6 12:bd8b17cd6a7b 50 else if (sd.remove("Test File.bin"))
neilt6 12:bd8b17cd6a7b 51 printf("failed to delete file!\n");
neilt6 12:bd8b17cd6a7b 52 else
neilt6 12:bd8b17cd6a7b 53 printf("done!\n\tResult: %.2fKB/s\n", 1024 / (timer.read_us() / 1000000.0));
neilt6 10:ae649a596123 54 timer.reset();
neilt6 10:ae649a596123 55 } else {
neilt6 10:ae649a596123 56 printf("failed to open file!\n");
neilt6 10:ae649a596123 57 }
neilt6 10:ae649a596123 58 }
neilt6 0:8f2b6eed2a9d 59
neilt6 0:8f2b6eed2a9d 60 int main()
neilt6 0:8f2b6eed2a9d 61 {
neilt6 12:bd8b17cd6a7b 62 //Configure CRC, large frames, and write validation
neilt6 10:ae649a596123 63 sd.crc(true);
neilt6 7:17ca3091939f 64 sd.large_frames(true);
neilt6 12:bd8b17cd6a7b 65 sd.write_validation(true);
neilt6 7:17ca3091939f 66
neilt6 10:ae649a596123 67 //Fill the buffer with random data for the write test
neilt6 10:ae649a596123 68 srand(time(NULL));
neilt6 10:ae649a596123 69 for (int i = 0; i < sizeof(buffer); i++)
neilt6 10:ae649a596123 70 buffer[i] = rand();
neilt6 10:ae649a596123 71
neilt6 0:8f2b6eed2a9d 72 while(1) {
neilt6 0:8f2b6eed2a9d 73 //Print the start message
neilt6 0:8f2b6eed2a9d 74 printf("\nPress the button to perform tests: ");
neilt6 0:8f2b6eed2a9d 75
neilt6 0:8f2b6eed2a9d 76 //Wait for the button to be pressed
neilt6 0:8f2b6eed2a9d 77 while(button);
neilt6 0:8f2b6eed2a9d 78
neilt6 0:8f2b6eed2a9d 79 //Display the card type and capacity
neilt6 0:8f2b6eed2a9d 80 printf("\nCard type: ");
neilt6 0:8f2b6eed2a9d 81 if (sd.card_type() == SDFileSystem::CARD_NONE)
neilt6 0:8f2b6eed2a9d 82 printf("None\n");
neilt6 0:8f2b6eed2a9d 83 else if (sd.card_type() == SDFileSystem::CARD_MMC)
neilt6 0:8f2b6eed2a9d 84 printf("MMC\n");
neilt6 0:8f2b6eed2a9d 85 else if (sd.card_type() == SDFileSystem::CARD_SD)
neilt6 0:8f2b6eed2a9d 86 printf("SD\n");
neilt6 0:8f2b6eed2a9d 87 else if (sd.card_type() == SDFileSystem::CARD_SDHC)
neilt6 0:8f2b6eed2a9d 88 printf("SDHC\n");
neilt6 0:8f2b6eed2a9d 89 else
neilt6 0:8f2b6eed2a9d 90 printf("Unknown\n");
neilt6 0:8f2b6eed2a9d 91 printf("Sectors: %llu\n", sd.disk_sectors());
neilt6 0:8f2b6eed2a9d 92 printf("Capacity: %.1fMB\n", (sd.disk_sectors() * 512) / 1048576.0);
neilt6 0:8f2b6eed2a9d 93
neilt6 10:ae649a596123 94 //Mount the filesystem
neilt6 10:ae649a596123 95 sd.mount();
neilt6 10:ae649a596123 96
neilt6 10:ae649a596123 97 /*//Format the card
neilt6 10:ae649a596123 98 printf("Formatting card...");
neilt6 0:8f2b6eed2a9d 99 if (sd.format() == 0)
neilt6 0:8f2b6eed2a9d 100 printf("success!\n");
neilt6 0:8f2b6eed2a9d 101 else
neilt6 0:8f2b6eed2a9d 102 printf("failed!\n");*/
neilt6 0:8f2b6eed2a9d 103
neilt6 10:ae649a596123 104 //Perform a read/write tests
neilt6 10:ae649a596123 105 writeTest();
neilt6 10:ae649a596123 106 readTest();
neilt6 0:8f2b6eed2a9d 107
neilt6 10:ae649a596123 108 //Unmount the filesystem
neilt6 10:ae649a596123 109 sd.unmount();
neilt6 0:8f2b6eed2a9d 110 }
neilt6 0:8f2b6eed2a9d 111 }