Revision 0:1b13e5949a49, committed 2019-08-02

Comitter:

csoulen

Date:

Fri Aug 02 18:18:15 2019 +0000

Commit message:

Code used to read a SN74LV8451 frequency counter. Use this to test if the counter is working appropriately;

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Aug 02 18:18:15 2019 +0000
@@ -0,0 +1,110 @@
+#include "mbed.h"
+ 
+Serial pc(USBTX, USBRX);
+DigitalOut clear_data(p21);
+BusIn data(p29, p28, p27, p26, p25, p24, p23, p22);
+DigitalOut CSAL(p16); 
+DigitalOut CSAU(p17); 
+DigitalOut CSBL(p18); 
+DigitalOut CSBU(p19); 
+DigitalOut store_data(p20);
+Timer t;
+    
+
+
+
+int mean_number = 1000;
+float time_stop = 10;  //in ms
+float freq_mean = 0;
+
+
+
+int main() 
+{
+    float frequency[mean_number];
+    float time_elapsed[mean_number];
+    //int total_counts[mean_number];
+    int total_counts;
+    //unsigned int data_store[4][mean_number];
+    unsigned int data_store[2];
+    store_data.write(1);
+    clear_data.write(1);
+    CSAL.write(1);
+    CSAU.write(1);
+    CSBL.write(1);
+    CSBU.write(1);
+       
+    while(1)
+    {
+        clear_data.write(0);
+        store_data.write(0);
+        clear_data.write(1);
+        
+        wait_ms(time_stop);
+
+        store_data.write(1);
+        
+        wait_us(10);
+        
+        CSAL.write(0);
+        data_store[0] = data;
+        CSAL.write(1);
+        pc.printf("%u ",data_store[0]);
+        wait_us(10);
+        
+        CSAU.write(0);
+        data_store[1] =  data;
+        CSAU.write(1);            
+        pc.printf("%u ",data_store[1]);
+  
+
+        data_store[1] = data_store[1]<<8;
+        total_counts = data_store[1]| data_store[0];
+        pc.printf("total counts: %i  \r\n",total_counts);
+    
+ 
+    }   
+       
+    /*  
+    for (int n = 0; n<mean_number; n++)
+    {
+        clear_data.write(0);
+        store_data.write(0);
+        clear_data.write(1);
+        
+        wait_ms(time_stop);
+
+        store_data.write(1);
+        
+        wait_us(10);
+        
+        CSAL.write(0);
+        data_store[0][n] = data;
+        CSAL.write(1);
+
+        wait_us(10);
+        
+        CSAU.write(0);
+        data_store[1][n] =  data;
+        CSAU.write(1);            
+
+    }
+  
+    for (int n = 0; n<mean_number; n++)
+    {
+                
+        data_store[3][n] = data_store[3][n]<<24;
+        data_store[2][n] = data_store[2][n]<<16;
+        data_store[1][n] = data_store[1][n]<<8;
+        
+        total_counts[n] = data_store[1][n]| data_store[0][n];
+        frequency[n] = total_counts[n]/(time_stop/100);
+        pc.printf("%u %u total counts: %i  \r\n",data_store[0][n],data_store[1][n]>>8,total_counts[n]);
+    
+ 
+    }
+    */
+    
+    
+
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Aug 02 18:18:15 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/3a7713b1edbc
\ No newline at end of file