[mw_shl_code=c,true]/*******lcd1602.c**********/ #include "lcd1602.h" #include "delay.h" void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOD,ENABLE);//????PB,PD?????±?? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //???ì???? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //IO????????50MHz GPIO_Init(GPIOD, &GPIO_InitStructure); //??????GPIOD0~7 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_14|GPIO_Pin_13; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //???ì???? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //IO????????50MHz GPIO_Init(GPIOB, &GPIO_InitStructure); //??????GPIB15,14,13 } /* ???????§×?±??? */ void LCD1602_Wait_Ready(void) { u8 sta; DATAOUT(0xff); LCD_RS_Clr(); LCD_RW_Set(); do { LCD_EN_Set(); delay_ms(5); //???±5ms??·??????? sta = GPIO_ReadInputDataBit(GPIOD, GPIO_Pin_7);//????×???×? LCD_EN_Clr(); }while(sta & 0x80);//bit7????1±í?????§???????????ì???±????????0???? } /* ?òLCD1602???§??????×????ü????cmd-???????ü???? */ void LCD1602_Write_Cmd(u8 cmd) { LCD1602_Wait_Ready(); LCD_RS_Clr(); LCD_RW_Clr(); DATAOUT(cmd); LCD_EN_Set(); LCD_EN_Clr(); } /* ?òLCD1602???§??????×?????????dat-???????????? */ void LCD1602_Write_Dat(u8 dat) { LCD1602_Wait_Ready(); LCD_RS_Set(); LCD_RW_Clr(); DATAOUT(dat); LCD_EN_Set(); LCD_EN_Clr(); } /* ???? */ void LCD1602_ClearScreen(void) { LCD1602_Write_Cmd(0x01); } /* ?è??????RAM???????·???à????±ê??????(x,y)-????????????×?·?×?±ê */ void LCD1602_Set_Cursor(u8 x, u8 y) { u8 addr; if (y == 0) addr = 0x00 + x; else addr = 0x40 + x; LCD1602_Write_Cmd(addr | 0x80); } /* ?????§??????×?·??®??(x,y)-????????????????×?±ê??str-×?·??®???? */ void LCD1602_Show_Str(u8 x, u8 y, u8 *str) { LCD1602_Set_Cursor(x, y); while(*str != '') { LCD1602_Write_Dat(*str++); } } /* ??????1602???§ */ void LCD1602_Init(void) { LCD1602_Write_Cmd(0x38); //16*2??????5*7???ó??8???????? LCD1602_Write_Cmd(0x0c); //??????????±ê??±? LCD1602_Write_Cmd(0x06); //??×??????????·×???+1 LCD1602_Write_Cmd(0x01); //???? } [/mw_shl_code]