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Hi all I am trying to write a program to generate bursts of sinewaves(each sine wave has three components).Can anyone suggest an modification this program below #include<math.h> #include<trans.h> #include<21065l.h> #include<signal.h> #define pi 3.14159 float out_real[1024],out_imag[1024]; float sig[1024]; float *rfft1024(const float dm sig[],float dm out_real[],float dm 0ut_imag[]); void main() { float t; int k,l; for(k=0,t=0;k<1000,t<=0.00001;k++,t=t+0.00000001) { sig[k]0*sinf(2*pi*1.5*10e6*t)+100*sinf(2*pi*2.0*10e6*t) +100*sinf(2*pi*2.5*10e6*t); if(sig[k]>150||sig[k]<-150) { if(sig[k]>150) sig[k]0; else { if(sig[k]<150) sig[k]=-150; } } } for(k00;k<1024;k++) { sig[k]=0; } rfft1024(sig,out_real,out_imag); } The program generates a single burst ..i need a series of bursts... can it be done using idle()... Thanks in advance Gaurav |
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Program help
Started by ●March 25, 2003
Reply by ●March 25, 20032003-03-25
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On Tue, 25 Mar 2003, gaurav_nukala wrote: > Hi all > I am trying to write a program to generate bursts of sinewaves(each > sine wave has three components).Can anyone suggest an modification > this program below > > #include<math.h> > #include<trans.h> > #include<21065l.h> > #include<signal.h> > #define pi 3.14159 > float out_real[1024],out_imag[1024]; > float sig[1024]; > float *rfft1024(const float dm sig[],float dm out_real[],float dm > 0ut_imag[]); > void main() > { > float t; > int k,l; > > for(k=0,t=0;k<1000,t<=0.00001;k++,t=t+0.00000001) This is kind of dangerous. Use k to run the for loop and set up t as a parameter inside the loop. > { > > sig[k]0*sinf(2*pi*1.5*10e6*t)+100*sinf(2*pi*2.0*10e6*t) > +100*sinf(2*pi*2.5*10e6*t); > I don't know how efficient the compiler is, but you may want to create the constants for "omega" outside the loop. Then you have sig[k] = 100*(sinf(w1*t) + sinf(w2*t) + sinf(w3*t)) This is easier for the compiler and more accurate computationally. > if(sig[k]>150||sig[k]<-150) > { > if(sig[k]>150) > sig[k]0; > else > { > if(sig[k]<150) > sig[k]=-150; > } > } > > } > for(k00;k<1024;k++) > { > sig[k]=0; > } > rfft1024(sig,out_real,out_imag); > } > The program generates a single burst ..i need a series of bursts... > can it be done using idle()... Should work fine. Just play with it until it does :-) Patience, persistence, truth, Dr. mike |
Reply by ●March 25, 20032003-03-25
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--On Tuesday, March 25, 2003 5:39 PM +0000 gaurav_nukala <> wrote: > for(k=0,t=0;k<1000,t<=0.00001;k++,t=t+0.00000001) The expression "k<1000" does nothing here. The comma operator returns the value of the second expression. Perhaps you meant to use the "&&" operator? |
Reply by ●March 26, 20032003-03-26
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1. you are defining several global variables, then using the same variable names in your rfft1024() parameter list. at best, this is confusing. at worst, it can be a source of much anguish. 2. your "for" loop is poorly constructed. increment your index k in the for statement, and increment t within the loop body. 3. what do mean by "a series of bursts"? --- gaurav_nukala <> wrote: > Hi all > I am trying to write a program to generate bursts of sinewaves(each > sine wave has three components).Can anyone suggest an modification > this program below > > #include<math.h> > #include<trans.h> > #include<21065l.h> > #include<signal.h> > #define pi 3.14159 > float out_real[1024],out_imag[1024]; > float sig[1024]; > float *rfft1024(const float dm sig[],float dm out_real[],float dm > 0ut_imag[]); > void main() > { > float t; > int k,l; > > for(k=0,t=0;k<1000,t<=0.00001;k++,t=t+0.00000001) > > { > > sig[k]0*sinf(2*pi*1.5*10e6*t)+100*sinf(2*pi*2.0*10e6*t) > +100*sinf(2*pi*2.5*10e6*t); > > if(sig[k]>150||sig[k]<-150) > { > if(sig[k]>150) > sig[k]0; > else > { > if(sig[k]<150) > sig[k]=-150; > } > } > > } > for(k00;k<1024;k++) > { > sig[k]=0; > } > rfft1024(sig,out_real,out_imag); > } > The program generates a single burst ..i need a series of bursts... > can it be done using idle()... > > Thanks in advance > Gaurav > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of this message will > receive your answer. You need to do a "reply all" if you want your answer to be distributed to > the entire group. > > _____________________________________ > About this discussion group: > > To Join: Send an email to > > To Post: Send an email to > > To Leave: Send an email to > > Archives: http://groups.yahoo.com/group/adsp > > Other Groups: http://www.dsprelated.com/groups.php3 > ">http://docs.yahoo.com/info/terms/ ===== __________________________________________________ |
Reply by ●October 10, 20032003-10-10
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Hi I wrote a small program that transfers a file from the BF533 to an another PC through RS232 using UART. Attached is the program #include<stdio.h> #include <cdefbf533.h> void main(void) { FILE *fptr1; static char val[]= "C:\Documents and Settings\Adminstrator\Desktop\testfile.txt"; //static int valdup[]={1,2,3,4,5,6,7,8,9,0}; //valdup[10]= (1,2,3,4,5,6,7,8,9 ); fptr1=fopen(val,"r"); //fptr2=fopen("valdup","rb"); //Starting the transfer through DMA using UART *pDMA7_PERIPHERAL_MAP=0x7000;//setting up the UART TX DMA regsiter *pUART_GCTL=0x1;//enabling the UART Clocks *pUART_LCR=0x0000;//Reset LCR regsiter *pUART_IER=0x0003;//enabling the receive and transmit buffer full interrupt *pDMA7_CONFIG=0x1000;//enabling autobuffer mode *pDMA7_START_ADDR=fptr1;//setting the pointer to the file as the starting address of the DMA *pDMA7_X_COUNT0;//setting the count *pDMA7_X_MODIFY=0x1;//modifying register *pUART_LCR=0x0083;//enabling 8 bits,1stop bit,no parity *pUART_DLL=0x001D;//setting the baud rate *pUART_DLH=0x0000; *pDMA7_CONFIG=0x0001;//starting the DMA transfer } 1.The program compiles but could not get anything at the terminal program on the PC. 2.On other hand when the change the the starting addr of the DMA to val i see charecters on the terminal (c:\documents....)becoz it points to the string array. That means it prints the charecters. 3.when i changed the type to static char and tried sending some integer values but i do not receive any. 4.I tried sending a file of charecters even it does not work. Plz suggest me where i m going wrong. Thank u Regards sriram __________________________________ |
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Reply by ●October 10, 20032003-10-10
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--On Friday, October 10, 2003 10:32 AM -0700 sriram K <> wrote: > FILE *fptr1; > fptr1=fopen(val,"r"); > *pDMA7_START_ADDR=fptr1;//setting the pointer > to the file as the starting address of the DMA That won't work. fptr1 points to a FILE structure, not an array of characters to transmit. Where is this file on your target? You somehow have a filesystem attached to your BF533? You should be fread'ing from it into a temporary array and then DMA'ing that to the UART. |
