正弦波```````.docVIP

Volume.c程序如下： #include stdio.h #include “volume.h” /*Global declarations */ Int inp_buffer[BUFSIZE];/*processing data buffers*/ Int out_buffer[BUFSIZE]; Int gain=MINGAIN;/*volum control variable*/ Unsigned int processingLoad=BASELOAD;/*processing load*/ Struct PARMS str= { 2934, 9432, 213, 9432, str }; /*Functions*/ Extern void load(unsigned int loadValue); Static int data processing(int *input,int *output); Static void dataIO(void); /*========main========*/ Void main () {int *input =inp_buffer[0]; Int *output=out_buffer[0]; Puts(“volume example started\n”); /*loop forever*/ While(TRUE) { /*read using a probe point connected to a host file.*/ /*write output to a graph connected through a probe-point. */ dataIO(); #ifdef FILEIO Puts (“begin processing”); #endif /*apply gain*/ Processing(input,output); } } /*========processing========* *FUNCTION:apply signal processing transform to input signal. *PARAMETERS:address of input and output buffers. *RETURN VALUE: TRUE.*/ Static int processing (int *input,int *output) { Int size=BUFSIZE; While (size--){ *output++=*input++ *gain; } /*additional processing load*/ Load (processingload); Return(TRUE); } /*========dataIO========* *FUNCTION: read input signal and write output signal. *PARAMETERS: none. *RETURN VALUE: none.*/ Static void dataIO() { /*do data I/O*/ Return ; } void sinmain(void) { unsigned int x,y; //double offset=0;//x坐标偏移量 //for(;;) { for(x=320;x0;x--) {//画正弦波 y=(int)(100*sin(((double)x)/20.0));//+offset PutPixel (y+120, x,0x07e0); Delay(10); } /*offset+=1; if(offset=2*3.14) offset=0;*/ Delay(100); Lcd_ClearScr( (0x0011) | (0x005) | (0x00) ); } }