Key points:
PORTA, PORTB, PORTC, PORTD, and PORTE are in input state after reset.
PORTA.4 is open-drain output.
TRISx is the direction register. When it is 0, it indicates output, and when it is 1, it indicates input.
PORTx is the IO port
PORTA. By default, it is not a digital IO port, but an analog IO port. If we
want to use PORTA as a digital IO port, we need to set ADCON1 = 0x06;
*****************************/
#include
#include "../head/config.h" //Include your own configuration header file
__CONFIG(HS&WDTDIS&LVPDIS&PWRTEN); //Set the fuse bit
//HS oscillation, disable watchdog, turn off low-voltage programming, and start the delay timer
void main(void)
{
PORTD = 0xff; //PORTD is ff
TRISD = 0x00; //PD port direction is set to output
while(1)
{
RD0 = 0; //RD0 outputs 1, turning on the LED
}
}
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