Question

Draw the flow chart of this C code program?

/old state flag bit oldstate; void main ( //configure PORTC pins 1/configure PORTA pins as digital digital ANSELC-0; as ANSELA 0; TRISAO bit = 1 ; //set RAO pin as input 1/ configure PORTC as Output TRISC-0X00; LATC 0XFF; //Initial PORTC value oldstate 0; while (1) if (Button (&PORTA, 0, 1, 1)) { //Detect Logical one oldstate-1; //Endless 1oop T/Update flag if (oldstate && Button (&PORTA, 0, 1, 0)) LATC LATC; //Detect one-to-zero transition /Invert PORTC 1/ Update flag oldstate-0;

Answer 1

Flow Chart Set Port-C as Output Port Set Port-A s Input Port Set OLD-STATE 0 Set PORT-C 0XFF Read Port-A NO If Port-A is HIGH? YES Set OLD-STATE 1 NO If OLD-STATE=1 && PORT-A is HIGH to ZERO? YES Set OLD-STATE 0 Invert Port-C End