PIC16F877A单片机是什么？

static unsigned char FFW[] ={        0x01, 0x03, 0x02, 0x06, 0x04, 0x0c, 0x08, 0x09};static unsigned char REV[] ={        0x09, 0x08, 0x0c, 0x04, 0x06, 0x02, 0x03, 0x01};void SETP_MOTOR_FFW( unsigned char n )//正转n圈{        unsigned char i, j;        for ( i = 0; i <.