各位好！我现在用LPC938单片机控制1602液晶显示，但为什么显示不出来，问一下，IO配置为推挽输出还是准双向口？演示用多大？代码如下，哪位大神解释下： #include #include sbit rs=P1^1; sbit rw=P2^6; sbit e=P2^7; sbit led=P1^0; #define dataport P0 void delay_us(unsigned int t) //延时(t*2+5) us { t *= 6; while(--t); } void delay_ms(unsigned int t) //延时t ms { while(t--) { delay_us(245); delay_us(245); } } void LPC938_Init(void) { //CLK_RESET_Init(); // UCFG1=0x40; //禁止看门狗复位、禁止掉电检测、使能P1.5复位，使用外部高频晶振12MHz DIVM=0x00; //外部晶振作为CPU时钟，不分频 //IO_Init(); P0M1=0x00; P0M2=0xff; P1M1=0x2c; //P15(RST)、P12(SCL/T0)、P13(SDA/INT0)配置为输入，其他的均为准双向口 P1M2=0xd3; P2M1=0x00; P2M2=0xff; } void lcd_write_com(unsigned char com) { // while(lcd_check_busy()); //忙则等待 rs=0; rw=0; e=1; dataport=com; _nop_(); e=0; } void lcd_write_data(unsigned char dat) { // while(lcd_check_busy()); //忙则等待 rs=1; rw=0; e=1; dataport=dat; _nop_(); e=0; } void lcd_clear(void) { lcd_write_com(0x01); delay_ms(5); } void lcd_write_char(unsigned char x,unsigned char y,unsigned char dat) { if (y==0) { lcd_write_com(0x80+x); } else { lcd_write_com(0xC0+x); } lcd_write_data(dat); } void lcd_write_string(unsigned char x,unsigned char y,unsigned char *s) { while(*s) { lcd_write_char(x,y,*s); s++;x++; } } void lcd_init(void) { lcd_write_com(0x38); /*显示模式设置*/ delay_ms(5); lcd_write_com(0x38); delay_ms(5); lcd_write_com(0x38); delay_ms(5); lcd_write_com(0x38); lcd_write_com(0x08); /*显示关闭*/ lcd_write_com(0x01); /*显示清屏*/ lcd_write_com(0x06); /*显示光标移动设置*/ delay_ms(5); lcd_write_com(0x0C); /*显示开及光标设置*/ } main() { LPC938_Init(); lcd_init(); lcd_clear(); lcd_write_string(0,1,"lcd1602"); delay_ms(500); while(1) { led =~ led; delay_ms(500); } } 下载时时钟配置为：高频外部晶振12MHz，使能P1^5，那位有用过的代码让我参考下！！！谢谢啦！！！