Diff: software_osc.cpp

Revision:

0:f6d3b930f382

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/software_osc.cpp	Sat Dec 10 21:08:30 2016 +0000
@@ -0,0 +1,156 @@
+#include "stdio.h"
+#include "stdint.h"
+#include "mbed.h"
+#include "Freedom_headers.h"
+
+#define USE_PC TRUE
+/* UNCOMMENT THE FOLLOWING LINE TO ENABLE SD CARD FILESYSTEM VIA DEFAULT SPI */
+#define USE_SD_CARD TRUE
+/* UNCOMMENT THE FOLLOWING LINE TO ENABLE DS1307 REAL-TIME CLOCK VIA IIC */
+#define USE_DS1307 TRUE
+/* UNCOMMENT THE FOLLOWING LINE TO ENABLE SIMPLE FIFO FUNCTIONS */
+#define USE_SIMPLE_FIFO TRUE
+
+#ifdef USE_PC
+Serial pc(USBTX,USBRX);
+
+#ifdef USE_SD_CARD
+#include "SDFileSystem.h"
+#define SD_MOSI PTD6
+#define SD_MISO PTD7
+#define SD_SCK  PTD5
+#define SD_CS   PTD4
+char sd_root_name[]="sd";
+char filename[80];
+SDFileSystem sd(SD_MOSI, SD_MISO, SD_SCK, SD_CS, sd_root_name);  /* MOSI,MISO,SCK,CS, "Name of directory structure" */
+
+#endif /* #ifdef USE_SD_CARD*/
+
+#ifdef USE_DS1307
+#include "EE3420_time.h"
+
+#endif /* #ifdef USE_DS1307*/
+
+#ifdef USE_SIMPLE_FIFO
+
+/* comment out the folloing definitions to use the library defaults */
+#define SIMPLE_FIFO_SIZE 32
+
+#include "simple_fifo.h"
+
+#endif /* #ifdef USE_SIMPLE_FIFO*/
+
+FIFO_FLOAT scope_data;
+int samples_active=0;
+float voltage_level;
+float ftemp;
+char timestr[80];
+
+int sample_count=0;
+    
+AnalogIn voltage_sensor(PTB0);
+InterruptIn left_button(PTC12);  /* button labeled SW3, wired active-low needing pull-up */
+Ticker t;
+#define SAMPLE_FREQUENCY 5000.0
+
+void take_sample()
+{
+    if(samples_active==1)
+    {    
+        voltage_level=voltage_sensor.read();
+        /*if(fifo_float_writable(&scope_data))
+        {
+        fifo_float_write(&scope_data,voltage_level);
+        }
+        else
+        {
+            printf("fifo overrun\n");
+            samples_active=0;
+        }*/
+        
+        
+        sample_count++;
+    }
+    if(sample_count>= 2000)
+    {
+        samples_active=0;
+    }
+}
+
+void start_sample()
+{
+    if(samples_active==0)
+    {
+        fifo_float_init(&scope_data);
+        sample_count=0;
+        samples_active=1;  
+    }
+    else
+    {
+        samples_active=0;
+    }
+    
+}
+
+int main()
+{
+
+#ifdef USE_PC    
+    pc.baud(115200);    /* set serial port speed to 115200 - must be matched in terminal emulator */
+#endif
+#ifdef USE_SLCD
+    slcd.All_Segments(0);
+#endif
+#ifdef USE_CHARACTER_LCD
+    character_lcd_initialize();
+#endif
+
+    fifo_float_init(&scope_data);
+    
+#ifdef USE_PC
+    pc.printf("\n");
+#endif
+
+    get_DS1307_time(&EE3420_DS1307_data);
+    set_KL46Z_RTC_from_DS1307();
+
+    sprintf(filename,"/sd/voltage.csv");
+    
+    FILE *fp = fopen(filename, "w");
+    if(fp == NULL) 
+    {
+        error("Could not open file ""%s"" for write\n", filename);
+    }
+    fprintf(fp,"date, time, scopes\n");
+    fclose(fp);
+
+    samples_active=0;
+    
+    left_button.mode(PullUp);
+    left_button.fall(&start_sample);
+
+    t.attach(&take_sample,1.0/SAMPLE_FREQUENCY);
+
+while(true)
+{
+    
+    if(fifo_float_readable(&scope_data))
+    {
+        
+        fp = fopen(filename, "a");
+        while(fifo_float_readable(&scope_data))
+        {
+            //get_DS1307_time(&EE3420_DS1307_data);
+            //format_time_string_24(&EE3420_DS1307_data, timestr);
+            fifo_float_read(&scope_data,&ftemp);
+            //fprintf(fp, "20%02i/%02i/%02i, %02i:%02i:%02i, %f\n",EE3420_DS1307_data.year,EE3420_DS1307_data.month,
+            //EE3420_DS1307_data.day,EE3420_DS1307_data.hours,EE3420_DS1307_data.min,EE3420_DS1307_data.sec,ftemp);
+            fprintf(fp, "%f\n",ftemp);
+            pc.printf("%f\n",ftemp);
+        }
+        fclose(fp);  
+    }
+}
+} //end of main()
+
+