Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: C2000WARE
Tool/software: Code Composer Studio
#include "F28x_Project.h"
void delay ();
void Gpio_setup (void);
unsigned int i;
void main(void)
{
InitSysCtrl ();
InitGpio ();
Gpio_setup ();
while (1)
{
EALLOW;
GpioDataRegs.GPADAT.bit.GPIO14 = 0;
DELAY_US(1000);
GpioDataRegs.GPADAT.bit.GPIO14 = 1;
DELAY_US(1000);
EDIS;
}
}
void Gpio_setup (void)
{
EALLOW;
GpioCtrlRegs.GPAMUX1.bit.GPIO14 = 0;//GPIO
GpioCtrlRegs.GPADIR.bit.GPIO14 = 1; //output
EDIS;
}
I have gone through the files
F2837xD_usDelay.asm
F2837xD_SysCtrl.c
F2837xD_Examples.h
but I am not able to relate the delay I get by calculating and the delay I am getting while debugging. While debugging for complete cycle it is 4ms while calculating i am getting only 40ms.
#define CPU_RATE 5.00L // for a 200MHz CPU clock speed (SYSCLKOUT)
I am using the command above for CPU clock speed.
and calculating the delay by this method
#define DELAY_US(A) F28x_usDelay(((((long double) A * 1000.0L) / (long double)CPU_RATE) - 9.0L) / 5.0L)
where in place of A I have taken 1000.
Please correct me and suggest me how to get the right delay.
Bighnaraj Panda
