Hi @ll, i am a a newbie to DSP's and have a lot of questions. My first problem is the perfomance. I have a ADSP-BF535 EZ-Kit Lite. There is an example how to alternate blinking PF0/PF2 and PF1/PF3 using a delay loop I try to get the max. performance but i couldn't alternate the pins faster then with 8 MHz. Please tell me how to modify the C-Source to get the max. perfomance. /*****************************************************************************/ /***This program alternates blinking PF0/PF2 and PF1/PF3 using a delay loop***/ /***This program is written in C. */ /* This program also shows an example on how to modify the C run-time header***/ /*****************************************************************************/ #include <sys/exception.h> #include <sys/excause.h> #include "defBF535.h" #define DELAY_LOOP 0xFFFFF /*global variables*/ volatile unsigned short * fio_dir_reg; volatile unsigned short * fio_set_reg; volatile unsigned short * fio_clr_reg; /*function prototype*/ void delay(void); /*void main()*/ void main() { fio_dir_reg = (unsigned short *)FIO_DIR; fio_set_reg = (unsigned short *)FIO_FLAG_S; fio_clr_reg = (unsigned short *)FIO_FLAG_C; /* set PF0 - PF3 as output */ *fio_dir_reg = (unsigned short)0x000F; asm("ssync;"); int a,b,c; for(;;) { /* clear all the LED */ *fio_set_reg = (unsigned short)0x000F; /* set LED to 0xA pattern */ *fio_clr_reg = (unsigned short)0x000F; } } /* simple delay routine */ void delay() { unsigned long i; for(i=0; i<DELAY_LOOP; i++) { asm("nop;nop;nop;nop;"); } return; } Thank's mswierzy
max. performance
Started by ●July 12, 2006