Diff: main.cpp

Revision:

0:58238bb83503

Child:

1:2b18f6628bc1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Feb 08 01:42:33 2013 +0000
@@ -0,0 +1,64 @@
+#include "mbed.h"
+#include "SDHCFileSystem.h"
+
+#define SIZE 10240 // KB
+
+Serial pc(USBTX, USBRX);
+DigitalOut myled(LED1);
+SDFileSystem sd(p5, p6, p7, p8, "sd");
+Timer t;
+
+float wtest (int b, int d) {
+    int i;
+    int s = b / d;
+    char buf[d];
+    FILE *fp;
+
+    fp = fopen("/sd/sdhc_test.dat", "w");
+    if (!fp) return 0;
+    myled = 1;
+    t.reset();
+    t.start();
+    for (i = 0; i < s; i ++) {
+        fwrite(buf, sizeof(unsigned char), d, fp);
+    }
+    fclose(fp);
+    t.stop();
+    myled = 0;
+    return t.read();
+}
+
+float rtest (int b, int d) {
+    int i;
+    int s = b / d;
+    char buf[d];
+    FILE *fp;
+
+    fp = fopen("/sd/test.dat", "r");
+    if (!fp) return 0;
+    myled = 1;
+    t.reset();
+    t.start();
+    for (i = 0; i < s; i ++) {
+        fread(buf, sizeof(unsigned char), d, fp);
+    }
+    fclose(fp);
+    t.stop();
+    myled = 0;
+    return t.read();
+}
+
+int main() {
+
+    pc.baud(115200);
+    pc.printf("start\r\n");
+
+    pc.printf("write   1: %f KB/sec\r\n", (float)SIZE / wtest(SIZE * 1024, 1));
+    pc.printf("read    1: %f KB/sec\r\n", (float)SIZE / rtest(SIZE * 1024, 1));
+    pc.printf("write 100: %f KB/sec\r\n", (float)SIZE / wtest(SIZE * 1024, 100));
+    pc.printf("read  100: %f KB/sec\r\n", (float)SIZE / rtest(SIZE * 1024, 100));
+    pc.printf("write 10k: %f KB/sec\r\n", (float)SIZE / wtest(SIZE * 1024, 10000));
+    pc.printf("read  10k: %f KB/sec\r\n", (float)SIZE / rtest(SIZE * 1024, 10000));
+
+    return 0;
+}