AN3995 datasheet(31/49 Pages) STMICROELECTRONICS

31 / 49 page

AN3995

e200z4d initialization and example code

Doc ID 022384 Rev 2

31/49

3.3

The e200z4d example code

After the basics initialization (see Section 3.2: e200z4d device configuration from C code),

the user configures the output pin (PE[4]) on which is connected a led (see e200z4d Core in

RM0070, see Section C.1: Reference document), the e200z4d core toggles the pin and

then loops forever (see Figure 25).

In the meantime, the e200z0h core executes a similar code to toggle a led through a

contiguous port pin.

Figure 25.

Application code: the main function

int main(int argc, char *argv[]){

Environment_Init();

/* Basic device Initilaizations */

/* (Modes,Pll,Start core 1,...)

/* Example Code start here */

/* Loop forever Flashing an LED connected to Port PE[4] */

/* (core Z0 code blink contiguous led) */

SIU.PCR[PIN_NUMBER].R = 0x0200;

/* PE[4] to GPIO mode, output */

while(1){

/* Invert LED output */

SIU.GPDO[PIN_NUMBER].R = (~(SIU.GPDO[PIN_NUMBER].R) & 0x01);

for (count=0; count<1000000; count++);

/* wait a while */

};

return 0;

} /* End Of Main */

AN3995 데이터시트(PDF) 31 Page - STMicroelectronics