Diff: main.cpp

Revision:

5:951ccd32598e

Parent:

3:5edc67dee8b7

--- a/main.cpp	Fri Feb 13 09:40:18 2015 +0000
+++ b/main.cpp	Wed Apr 05 13:37:53 2017 +0000
@@ -16,6 +16,7 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
+/*
 #include "mbed.h"
 #include "SDFileSystem.h"
 
@@ -23,8 +24,69 @@
 SDFileSystem sd(D11, D12, D13, D10, "sd"); // MOSI, MISO, SCK, CS
 FILE *fp;
 
+AnalogIn   ain(A0);
+Ticker casovac;             //timer s prerusenim
+Ticker casovac2;             //timer s prerusenim
+float perioda=0.001;        // 4khz
+volatile int poc=0;
+
+void init_sd()
+{
+    wait(2);
+    pc.printf("Initializing\r\n");
+    
+    fp = fopen("/sd/hello.txt", "r");
+    if (fp != NULL) {
+        fclose(fp);
+        remove("/sd/hello.txt");
+        pc.printf("Remove an existing file with the same name\r\n");
+    }
+    
+    fp = fopen("/sd/hello.txt", "w");
+    if (fp == NULL) {
+        pc.printf("Unable to write the file\r\n");
+    }
+    fclose(fp);
+}
+
+void fun(void) {
+    __disable_irq();    // Disable Interrupts
+ //   pc.printf("%3.8f\r\n", ((ain.read()*2)-1));
+ //   pc.printf("blabla\r\n");
+    fp = fopen("/sd/hello.txt", "a");
+//    pc.printf("otvoreny\r\n");
+    fprintf(fp, "%3.4f\r\n", ain.read());
+//    pc.printf("zapisany\r\n");
+    fclose(fp);
+//    pc.printf("zatvoreny\r\n");
+    poc++;
+    __enable_irq();     // Enable Interrupts   
+}
+
+void pocitadlo(void){
+    poc++;
+//    pc.printf("Hodnota pocitadla: %d\r\n", poc );
+}
+
 int main() {
-    wait(2);
+    pc.baud(921600);
+    __disable_irq();    // Disable Interrupts
+    init_sd();
+    casovac.attach(&fun, perioda);
+//    casovac2.attach(&pocitadlo, 1.0);
+//    pc.printf("Cakam 5 s \r\n");
+    __enable_irq();     // Enable Interrupts
+    while(poc<3000)
+    {
+        pc.printf("Hodnota pocitadla: %d\r\n", poc );
+        wait(0.1);
+    }
+//    fclose(fp);
+    pc.printf("File successfully written!\r\n");
+}
+  
+    
+/*    wait(2);
     pc.printf("Initializing\r\n");
     
     fp = fopen("/sd/hello.txt", "r");
@@ -42,4 +104,82 @@
         fclose(fp);
         pc.printf("File successfully written!\r\n");
     }
+*/
+
+#include "mbed.h"
+#include "SDFileSystem.h"
+SDFileSystem sd(D11, D12, D13, D10, "sd"); // MOSI, MISO, SCK, CS
+FILE *myLogFile;
+Ticker sampleTicker;
+AnalogIn sensor(A0);
+Timer fileOpenTimer;
+ 
+#define bufferSize 8192
+float sensorReading[bufferSize];
+unsigned int readPointer = 0;
+volatile unsigned int writePointer = 0; // volatile so that the main loop knows to check for changes.
+volatile unsigned int poc=0;
+ 
+// opens the next unused file name in the format set.
+// This can be a little slow the first time if there are already lots of log files
+// since it tries each number in turn but the second call on will be fairly quick.
+FILE *nextLogFile(void)
+{
+    static unsigned int fileNumber = 0;
+    char fileName[32];
+    FILE *filePtr = NULL;
+    do {
+        if (filePtr != NULL)
+            fclose(filePtr);
+        sprintf(fileName,"/sd/log%04u.csv",fileNumber++);
+        filePtr = fopen(fileName,"r");
+    } while (filePtr != NULL);
+    return fopen( fileName,"w");
 }
+ 
+void onSampleTick(void)
+{
+    sensorReading[writePointer++] = sensor*3.2; // scale to give a voltage rather than value from 0 to 1.
+    if (writePointer == bufferSize)
+        writePointer = 0;
+    if (writePointer == readPointer) {
+        // BUFFER OVERFLOW. You may want to print an error message or turn an LED on
+    }
+    poc++;
+}
+ 
+ main()
+{
+    printf("ZACIATOK\r\n");
+    myLogFile = nextLogFile();
+    if (!myLogFile) {
+        // ERROR failed to open the first log file for writing.
+        // The SD card is missing, not working, read only or full?
+ 
+        return 1; // probably want to exit the program in this situation
+    }
+ 
+    fileOpenTimer.start();
+    sampleTicker.attach(&onSampleTick,0.000125); // sets the sample period in seconds
+ 
+    while (true) {
+ 
+        while (writePointer != readPointer) { // write any waiting data to the SD card
+            fprintf(myLogFile,"%.2f\r\n",sensorReading[readPointer++]);
+            if(poc>40000)
+            {
+                fclose(myLogFile);
+                printf("KONIEC\r\n");
+                exit(0);
+            }
+            if (readPointer == bufferSize)
+                readPointer = 0;
+        }
+    }
+}
+
+
+
+
+
+