Diff: main.cpp

Revision:

1:6a820a0ca03b

Parent:

0:84a8bcfbdec9

Child:

2:bf2ce6c4e789

diff -r 84a8bcfbdec9 -r 6a820a0ca03b main.cpp
--- a/main.cpp	Mon Oct 07 22:58:19 2013 +0000
+++ b/main.cpp	Mon Oct 21 22:36:51 2013 +0000
@@ -9,94 +9,69 @@
 #include "lcd.h"
 #include "jtag.h"
 #include "mmap.h"
-#include "clock.h"   
+#include "clock.h"
 #include "EasyBMP.h"
+#include "main.h"
 
-extern "C" void mbed_reset();
-extern "C" void HardFault_Handler() { mbed_reset(); }
-class Watchdog {
-public:
-// Load timeout value in watchdog timer and enable
-    void kick(float s) {
-        LPC_WDT->WDCLKSEL = 0x1;                // Set CLK src to PCLK
-        uint32_t clk = SystemCoreClock / 16;    // WD has a fixed /4 prescaler, PCLK default is /4
-        LPC_WDT->WDTC = s * (float)clk;
-        LPC_WDT->WDMOD = 0x3;                   // Enabled and Reset
-        kick();
-    }
-// "kick" or "feed" the dog - reset the watchdog timer
-// by writing this required bit pattern
-    void kick() {
-        LPC_WDT->WDFEED = 0xAA;
-        LPC_WDT->WDFEED = 0x55;
-    }
-};
-Watchdog wdt;
-void DDRO_Sensor(void);
-int FFT_Freq(float);
+int main()
+{
+    float core_volt = 1;
 
-int main() {
-    float new_power = 0.9;
-   
-    //wdt.kick(20.0); 
+    //wdt.kick(20.0);
     pc.printf("Begin FFT\r\n");
-    char buffer[21];
-   
     power_down();
-    power_up(new_power); // Power Up Chip
+    power_up(core_volt); // Power Up Chip
     pc.printf("Powered up!\r\n");
 
     PORESETn = 0;
     CORERESETn = 0;
+    wait_us(100);
     PORESETn = 1;
     CORERESETn = 1;
-    
+
     JTAG jtag;
     int idcode = jtag.readID();
     if(idcode != 0x4ba00477) {
         pc.printf("ERROR: IDCode %X\r\n", idcode);
-        wait(20);
+        wait(2);
         power_down();
         return -1;
     }
     pc.printf("IDCode %X\r\n", idcode);
-   
+
     jtag.reset();
     jtag.leaveState();
     jtag.PowerupDAP();
-    int freq = FFT_Freq(new_power);
-    pc.printf("fft working frequency: %d MHz\r\n", freq);
+    // setup necessary internal clock source selection
+    jtag.writeMemory(intclk_source, 2);
+    jtag.writeMemory(extclk_source, 1);
+    jtag.writeMemory(ext_div_by, 10);
+    power_core(1);
+    /*
+    for (int i=0; i<2; i++) {
+        int upper = 120;
+        int lower = 22;
+        while (upper-lower > 1) {
+            int middle = (upper+lower)/2;
+            middle = middle * 5;
+            if(check_FFT_Freq(jtag, middle)) {
+                lower = middle/5;
+            } else {
+                upper = middle/5;
+            }
+        }
+        pc.printf("fft working frequency: %d MHz\r\n", lower*5);
+    }
+    */
+    set_pll_frequency (200, jtag);
+    DDRO_Sensor(jtag);
+    /*
     
-    DDRO_Sensor(); 
     jtag.writeMemory(ddro_pad_out, 0xffffffff);
-    printf("Reading ddro pad out %x\n", jtag.readMemory(ddro_pad_out));
+    printf("Reading ddro pad out %x\r\n", jtag.readMemory(ddro_pad_out));
     jtag.writeMemory(ddro_div_by, 0xffffffff);
-    printf("Reading ddro div by %x\n", jtag.readMemory(ddro_div_by));
-   
-    //wdt.kick();
-    gain_ctrl=0;
-    pc.printf("GAIN_CTRL = 0\r\n");
-    pc.printf("SEN: %f\r\n",meas_sen.read());
-    pc.printf("MEM1: %f\r\n",meas_mem1.read());
-    pc.printf("MEM2: %f\r\n",meas_mem2.read());
-    pc.printf("CORE: %f\r\n",meas_core.read());
-    pc.getc();
-    wait(1);
-    gain_ctrl=1;
-    pc.printf("GAIN_CTRL = 1\r\n");
-    pc.printf("SEN: %f\r\n",meas_sen.read());
-    pc.printf("MEM1: %f\r\n",meas_mem1.read());
-    pc.printf("MEM2: %f\r\n",meas_mem2.read());
-    pc.printf("CORE: %f\r\n",meas_core.read());
-    pc.getc();
-    wait(1);
-    gain_ctrl=0;
-    pc.printf("GAIN_CTRL = 0\r\n");
-    pc.printf("SEN: %f\r\n",meas_sen.read());
-    pc.printf("MEM1: %f\r\n",meas_mem1.read());
-    pc.printf("MEM2: %f\r\n",meas_mem2.read());
-    pc.printf("CORE: %f\r\n",meas_core.read());
-    pc.getc();
+    printf("Reading ddro div by %x\r\n", jtag.readMemory(ddro_div_by));
+
     wait(1);
     gain_ctrl=1;
     pc.printf("GAIN_CTRL = 1\r\n");
@@ -104,243 +79,94 @@
     pc.printf("MEM1: %f\r\n",meas_mem1.read());
     pc.printf("MEM2: %f\r\n",meas_mem2.read());
     pc.printf("CORE: %f\r\n",meas_core.read());
-    pc.getc();
-    char paus;
+
+    wait(1);
+    gain_ctrl=0;
+    pc.printf("GAIN_CTRL = 0\r\n");
+    pc.printf("SEN: %f\r\n",meas_sen.read());
+    pc.printf("MEM1: %f\r\n",meas_mem1.read());
+    pc.printf("MEM2: %f\r\n",meas_mem2.read());
+    pc.printf("CORE: %f\r\n",meas_core.read());
+    */
+
     pc.printf("Powering Down\r\n");
     power_down();
     pc.printf("Done\r\n");
 }
 
-int FFT_Freq(float vdd) {
-    
-    JTAG jtag;
-    char buffer[21];
-    int counter_set=200;
-    int flag=0;
-    while(flag==0){
-    //load program
-        
-        if(jtag.loadProgram()) {
-            dual_printf("Load Failed");
-            exit(1);
-        }
-        jtag.writeMemory(PLL_RESET, 0);
-        jtag_pll(jtag, 1, 1, counter_set, 1, 10, 32 );
-        jtag.writeMemory(PLL_RESET, 1);
-        jtag.writeMemory(PLL_RESET, 0);
-        unsigned long long freq = calc_pll_freqs(1, 1, counter_set, 1, 10, 32);
-        freq = freq / 1000000; // in MHz
-        int fMHz = freq;
-        // dual_printf(buffer);
-         power_core(vdd);
-    
-         //dual_printf("Resetting");
-         CORERESETn = 0;
-         CORERESETn = 1;
-         wait(0.2);
-         jtag.reset();
-         jtag.leaveState();
-         jtag.PowerupDAP();
-        //  dual_printf("Reset finished");
-    
-    
-         unsigned int buffer_fft[64];
-         for (int number1=0; number1<=63; number1++) {
-               buffer_fft[number1] = jtag.readMemory(0x24000100 + number1*4);
-        //printf("new[%d]: %x\n", number1, buffer_fft[number1]);
-         }
-    
-         if ( buffer_fft[0] == 0x0000fffc && buffer_fft[1]==0x0000fffd && buffer_fft[2]==0xffc0000a && buffer_fft[3]==0x0000fffe && 
-              buffer_fft[4]==0x0000fffd && buffer_fft[5]==0x0000ffff && buffer_fft[6]==0x0000fffd && buffer_fft[7]==0x00000000 && 
-              buffer_fft[8]==0x0000ffff && buffer_fft[9]==0x0000ffff && buffer_fft[10]==0xfffeffff && buffer_fft[11]==0xffff0000 && 
-              buffer_fft[12]==0x0000ffff && buffer_fft[13]==0xffff0000 && buffer_fft[14]==0xfffffffe && buffer_fft[15]==0xffff0000 &&  
-              buffer_fft[16]==0x00010000  && buffer_fft[17]==0x0001ffff && buffer_fft[18]==0x0000ffff && buffer_fft[19]==0x0001ffff &&  
-              buffer_fft[20]==0x0001fffe && buffer_fft[21]==0x0000fffe && buffer_fft[22]==0x0001fffe && buffer_fft[23]==0x0000ffff && 
-              buffer_fft[24]==0x0000ffff && buffer_fft[25]==0x0001fffe && buffer_fft[26]==0x0000ffff && buffer_fft[27]==0x00010000 &&  
-              buffer_fft[28]==0x0001ffff && buffer_fft[29]==0x00010000 && buffer_fft[30]==0x0000ffff && buffer_fft[31]==0x00010000 &&  
-              buffer_fft[32]==0x0000ffff && buffer_fft[33]==0x0000ffff && buffer_fft[34]==0x0000ffff && buffer_fft[35]==0x0000ffff &&  
-              buffer_fft[36]==0x0000fffe && buffer_fft[37]==0x0000ffff && buffer_fft[38]==0x0000fffe && buffer_fft[39]==0x00000000 &&  
-              buffer_fft[40]==0xffffffff && buffer_fft[41]==0x0000ffff && buffer_fft[42]==0xffffffff && buffer_fft[43]==0x00000000 &&  
-              buffer_fft[44]==0x0000ffff && buffer_fft[45]==0x00000000 && buffer_fft[46]==0xffffffff && buffer_fft[47]==0x00000000 && 
-              buffer_fft[48]==0x00000000 && buffer_fft[49]==0x00000000 && buffer_fft[50]==0x00000000 && buffer_fft[51]==0x00000000 &&  
-              buffer_fft[52]==0x0000ffff && buffer_fft[53]==0x0000ffff && buffer_fft[54]==0x0000ffff && buffer_fft[55]==0x00000000 && 
-              buffer_fft[56]==0xfffeffff && buffer_fft[57]==0xffffffff && buffer_fft[58]==0xffff0000 && buffer_fft[59]==0x00000000 && 
-              buffer_fft[60]==0x0000ffff && buffer_fft[61]==0x00000000 && buffer_fft[62]==0x003d000c && buffer_fft[63]==0x00000000 ) {
-              //printf("***********************maximum freq ***********************   %d", fMHz);
-                     flag = 1;
-              //return fMHz;
-              }            
-          else counter_set = counter_set-1; 
+int check_FFT_Freq(JTAG &jtag, int fMHz)
+{
+    if(jtag.loadProgram()) {
+        dual_printf("Load Failed");
+        exit(1);
+    }
+    set_pll_frequency (fMHz, jtag);
+    //dual_printf("Resetting");
+    CORERESETn = 0;
+    CORERESETn = 1;
+    wait(0.2);
+    jtag.reset();
+    jtag.leaveState();
+    jtag.PowerupDAP();
+    unsigned int buffer_fft[64];
+    for (int number1=0; number1<=63; number1++) {
+        buffer_fft[number1] = jtag.readMemory(0x24000100 + number1*4);
+        jtag.writeMemory(0x24000100 + number1*4,0xF0F0F0F0);
+        //printf("new[%d]: %d\r\n", number1, buffer_fft[number1]);
     }
-    unsigned long long freq = calc_pll_freqs(1, 1, counter_set, 1, 10, 32);
-    freq = freq / 1000000; // in MHz
-    int fMHz = freq;
-    return fMHz;
+    if ( buffer_fft[0] == 0x0000fffc && buffer_fft[1]==0x0000fffd && buffer_fft[2]==0xffc0000a && buffer_fft[3]==0x0000fffe &&
+            buffer_fft[4]==0x0000fffd && buffer_fft[5]==0x0000ffff && buffer_fft[6]==0x0000fffd && buffer_fft[7]==0x00000000 &&
+            buffer_fft[8]==0x0000ffff && buffer_fft[9]==0x0000ffff && buffer_fft[10]==0xfffeffff && buffer_fft[11]==0xffff0000 &&
+            buffer_fft[12]==0x0000ffff && buffer_fft[13]==0xffff0000 && buffer_fft[14]==0xfffffffe && buffer_fft[15]==0xffff0000 &&
+            buffer_fft[16]==0x00010000  && buffer_fft[17]==0x0001ffff && buffer_fft[18]==0x0000ffff && buffer_fft[19]==0x0001ffff &&
+            buffer_fft[20]==0x0001fffe && buffer_fft[21]==0x0000fffe && buffer_fft[22]==0x0001fffe && buffer_fft[23]==0x0000ffff &&
+            buffer_fft[24]==0x0000ffff && buffer_fft[25]==0x0001fffe && buffer_fft[26]==0x0000ffff && buffer_fft[27]==0x00010000 &&
+            buffer_fft[28]==0x0001ffff && buffer_fft[29]==0x00010000 && buffer_fft[30]==0x0000ffff && buffer_fft[31]==0x00010000 &&
+            buffer_fft[32]==0x0000ffff && buffer_fft[33]==0x0000ffff && buffer_fft[34]==0x0000ffff && buffer_fft[35]==0x0000ffff &&
+            buffer_fft[36]==0x0000fffe && buffer_fft[37]==0x0000ffff && buffer_fft[38]==0x0000fffe && buffer_fft[39]==0x00000000 &&
+            buffer_fft[40]==0xffffffff && buffer_fft[41]==0x0000ffff && buffer_fft[42]==0xffffffff && buffer_fft[43]==0x00000000 &&
+            buffer_fft[44]==0x0000ffff && buffer_fft[45]==0x00000000 && buffer_fft[46]==0xffffffff && buffer_fft[47]==0x00000000 &&
+            buffer_fft[48]==0x00000000 && buffer_fft[49]==0x00000000 && buffer_fft[50]==0x00000000 && buffer_fft[51]==0x00000000 &&
+            buffer_fft[52]==0x0000ffff && buffer_fft[53]==0x0000ffff && buffer_fft[54]==0x0000ffff && buffer_fft[55]==0x00000000 &&
+            buffer_fft[56]==0xfffeffff && buffer_fft[57]==0xffffffff && buffer_fft[58]==0xffff0000 && buffer_fft[59]==0x00000000 &&
+            buffer_fft[60]==0x0000ffff && buffer_fft[61]==0x00000000 && buffer_fft[62]==0x003d000c && buffer_fft[63]==0x00000000 ) {
+        return 1;
+    } else {
+        return 0;
+    }
 }
 
-void DDRO_Sensor(void){
-    JTAG jtag;
+void DDRO_Sensor(JTAG &jtag)
+{
     /**********************enable****************************************/
     jtag.writeMemory(ddro_syn_en, 0xffffffff);
-    //printf("Reading ddro syn en %x\n", jtag.readMemory(ddro_syn_en));
     jtag.writeMemory(ddro_inv_en, 0xffffffff);
-   // printf("Reading ddro inv en %x\n", jtag.readMemory(ddro_inv_en));
-    
     /**********************set ref_clk and samp_clk**********************/
-    jtag.writeMemory(ddro_samp_src, 0x00000000);
-    //printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_ref_src, 0x00000003);
-    //printf("Reading samp src %x\n", jtag.readMemory(ddro_samp_src));
-    
+    jtag.writeMemory(ddro_ref_src, 0x00000002);
     /**********************write threshold*******************************/
-   // printf("Writing threshold\n");
-    jtag.writeMemory(ddro_threshold, 10);
-   // printf("Reading threshold %d\n", jtag.readMemory(ddro_threshold));
+    jtag.writeMemory(ddro_threshold, 100000);
+    //jtag.writeMemory(0xe000e104, 0x000000ff); // enable interrupts
 
-    jtag.writeMemory(0xe000e104, 0x000000ff); // enable interrupts
-    
-    /**********************start DDRO************************************/
-  //  printf("Ready to start DDRO \n");
-  //  printf("DDRO starting\n");
-    jtag.writeMemory(ddro_start, 1);//*ddro_start = 1;
-    
-    /*********************output*****************************************/
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);//*ddro_start = 1;
-  
-  
-  
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000004);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);//*ddro_start = 1;
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000005);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000006);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000007);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000008);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000009);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x0000000a);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x0000000b);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x0000000c);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x0000000d);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x0000000e);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x0000000f);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000010);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000011);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000012);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000013);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000014);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000015);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000016);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000017);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000018);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
-    jtag.writeMemory(ddro_ref_src, 0x00000019);
-    printf("Reading ddro ref src %x\n", jtag.readMemory(ddro_ref_src));
-    jtag.writeMemory(ddro_start, 1);
-    printf("Reading ddro_count %d\n", jtag.readMemory(ddro_count));
-    jtag.writeMemory(ddro_start, 0);
-    
- }
+    for (int ro_id=3;ro_id<=15;ro_id++) {
+        pc.printf("RO %d\r\n ", ro_id-2);
+        jtag.writeMemory(ddro_samp_src, ro_id);
+        jtag.writeMemory(ddro_start, 0);
+        int meas1 = jtag.readMemory(ddro_count);
+        pc.printf("Counter starts at: %d  ", meas1);
+        jtag.writeMemory(ddro_start, 1);
+        wait_us(50000);
+        jtag.writeMemory(ddro_start, 0);
+        meas1 = jtag.readMemory(ddro_count);
+        pc.printf("ends at: %d\r\n", meas1);
+        
+        jtag.writeMemory(ddro_samp_src, ro_id);
+        jtag.writeMemory(ddro_start, 0);
+        meas1 = jtag.readMemory(ddro_count);
+        pc.printf("Counter starts at: %d  ", meas1);
+        jtag.writeMemory(ddro_start, 1);
+        wait_us(50000);
+        jtag.writeMemory(ddro_start, 0);
+        meas1 = jtag.readMemory(ddro_count);
+        printf("ends at: %d\r\n", meas1);
+    }
+}