sbit p_csa=P2^6; sbit p_csb=P2^7; sbit p_gnda=P2^5; sbit p_gndb=P2^4; sbit p_di=P2^3; sbit p_rw=P2^2; sbit p_e=P2^1; /*忙判别*/ void lcd_busy(void) { p_di=0;p_rw=1;P0=0xff; while (1) { p_e=1; if (P0=64) {p_csa=0;p_csb=1;} else {p_csb=0;p_csa=1;} lcd_bu