void LCD_write_data(unsigned char Recdata) //写数据
{
uint16_t PORT_DATA, tmpCmd = 0;
Delay_1ms(2);
//LCD1602_RS=1; //RS=1
GPIO_SetBits(LCD1602_RS_PORT, LCD1602_RS_PIN);
Delay_1ms(2);
PORT_DATA = GPIO_ReadInputData(LCD1602_DB_PORT);
PORT_DATA &= (~LCD1602_DB_MASK);
tmpCmd = (uint16_t)(LCD_SWAP_High4Bits(Recdata) & 0xf0) << 2;
PORT_DATA |= tmpCmd;
GPIO_Write(LCD1602_DB_PORT, PORT_DATA); // 写高四位
//LCD_DATA&=0X0f; // 清高四位
//LCD_DATA|=Recdata&0xf0; // 写高四位
LCD_en_write();
Recdata=Recdata<<4; // 低四位移到高四位
PORT_DATA = GPIO_ReadInputData(LCD1602_DB_PORT);
PORT_DATA &= (~LCD1602_DB_MASK);
tmpCmd = 0;
tmpCmd = (uint16_t)(LCD_SWAP_High4Bits(Recdata) & 0xf0) << 2;
PORT_DATA |= tmpCmd;
GPIO_Write(LCD1602_DB_PORT, PORT_DATA); // 写低四位
//LCD_DATA&=0X0f; // 清高四位
//LCD_DATA|=Recdata&0xf0; // 写低四位
LCD_en_write();
}
void LCD_write_command(unsigned char command) //写指令
{
uint16_t PORT_DATA, tmpCmd = 0;
//LCD1602_RS=0; //RS=0
GPIO_ResetBits(LCD1602_RS_PORT, LCD1602_RS_PIN);
Delay_1ms(2);
PORT_DATA = GPIO_ReadInputData(LCD1602_DB_PORT);
PORT_DATA &= (~LCD1602_DB_MASK);
//GPIO_Write(LCD1602_DB_PORT, PORT_DATA);
tmpCmd = ((uint16_t)(LCD_SWAP_High4Bits(command) & 0xf0)) << 2;
PORT_DATA |= tmpCmd;
GPIO_Write(LCD1602_DB_PORT, PORT_DATA); // 写高四位
LCD_en_write();
command=command<<4; // 低四位移到高四位
PORT_DATA = GPIO_ReadInputData(LCD1602_DB_PORT);
PORT_DATA &= (~LCD1602_DB_MASK);
//GPIO_Write(LCD1602_DB_PORT, PORT_DATA);
tmpCmd = 0;
tmpCmd = ((uint16_t)(LCD_SWAP_High4Bits(command) & 0xf0)) << 2;
PORT_DATA |= tmpCmd;
GPIO_Write(LCD1602_DB_PORT, PORT_DATA); // 写低四位
//LCD_DATA|=command&0xf0;
LCD_en_write();
}
void LCD_byte(INT8U abc)
{
RW = 0;
LCD_E = 0;
LCD_DATA = abc;
LCD_en_write();
}
void LCD_init(void) //
{
LCD_GPIO_Init();
#if 1
Delay_1ms(20);
w_4bit_INIT_LCD1602(0x30); //写第一次0x3N命令（N为任意值）
Delay_1ms(10); //至少延迟4.1ms
w_4bit_INIT_LCD1602(0x30); //写第二次0x3N命令（N为任意值）
Delay_1us(200); //至少延迟100us
w_4bit_INIT_LCD1602(0x30); //写第三次0x3N命令（N为任意值）
Delay_1us(100); //至少延迟40us
w_4bit_INIT_LCD1602(0x20); //设置为4位模式
Delay_1us(100); //至少延迟40us
LCD_write_command(0x28); //设置为4位模式，2行字符，5 x 7点阵/每字符
Delay_1us(100); //至少延迟40us
LCD_write_command(0x06); //写入新数据后光标右移，写入新数据后显示屏不移动
Delay_1us(100); //至少延迟40us
LCD_write_command(0x0e); //显示功能开，有光标，光标不闪烁
Delay_1us(100); //至少延迟40us
LCD_write_command(0x01); //清除液晶显示器
Delay_1ms(10); //至少延迟1.64ms
GPIO_ResetBits(LCD1602_RW_PORT, LCD1602_RW_PIN);
Delay_1ms(10);
#else
LCD_write_command(0x33);
Delay_1ms(5);
LCD_write_command(0x28);
Delay_1ms(5);
LCD_write_command(0x28);
Delay_1ms(5);
LCD_write_command(0x28);
Delay_1ms(5);
LCD_en_write();
Delay_1ms(5);
LCD_write_command(0x28); //4
Delay_1ms(5);
LCD_write_command(0x0c); // 显示开
Delay_1ms(5);
LCD_write_command(0x01); // 清屏
Delay_1ms(5);
GPIO_ResetBits(LCD1602_RW_PORT, LCD1602_RW_PIN);
#endif
}
void w_4bit_INIT_LCD1602(unsigned char ucCMD)
{
uint16_t PORT_DATA, tmpCmd = 0;
GPIO_ResetBits(LCD1602_RS_PORT, LCD1602_RS_PIN); //RS_L; //写入的是命令字
GPIO_ResetBits(LCD1602_RW_PORT, LCD1602_RW_PIN); //RW_W; //置为写状态
PORT_DATA = GPIO_ReadInputData(LCD1602_DB_PORT);
PORT_DATA &= (~LCD1602_DB_MASK);
tmpCmd = (uint16_t)(LCD_SWAP_High4Bits(ucCMD) & 0xf0) << 2;
PORT_DATA |= tmpCmd;
GPIO_Write(LCD1602_DB_PORT, PORT_DATA); // 写高四位
//P1 = (P1 & 0x0F) | (ucCMD & 0xF0); //注意不要改变P2低四位的状态
LCD_en_write(); //En_Toggle(); //产生使能脉冲，使之在下降沿开始执行指令
}
//写一个字节到LCD ,COMM(指令) DAT（显示数据)
void LCD_write_onechar(unsigned char COMM,unsigned char DAT)
{
wait_LCD_Ready(); //等待LCD空闲
LCD_RW_0; //写
//写数据
if(COMM==0)
{
LCD_RS_1; //RS高电平向LCD写数据
LCD_DATA_PORT=DAT;
}
//写命令
else
{
LCD_RS_0;
LCD_DATA_PORT=COMM;
}
LCD_en_write();
Delay_nUS(2);
LCD_RW_1;
LCD_RS_1;
}