鸿蒙开发板Hi3861驱动LCD1602A_4线并口模式_基于code-2.0 原创

发布于 2021-10-16 21:17
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鸿蒙开发板Hi3861驱动LCD1602A_4线并口模式_基于code-2.0
https://blog.csdn.net/txwtech/article/details/120690899
鸿蒙开发板Hi3861驱动LCD1602A_4线并口模式_基于code-2.0-开源基础软件社区

 
#include "_ansi.h"
#include <stdio.h> 
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "iot_gpio.h"
#include "hi_io.h"
#include "iot_pwm.h"
#include "hi_pwm.h"          
#include "font_lcd1602.h"
 
 
/*
//
//by txwtech
2021.10
LCD1602--Hi3861 Board
2 VDD--3V3
3 V0 --GND
4 RS --GPIO6
5 RW --GND
6 E  --GPIO8
11 D4 --GPIO9
12 D5 --GPIO10
13 D6 --GPIO11
14 D7 --GPIO12
15 A --3V3
16 K --GND
*/
 
#define lcd_rs HI_IO_NAME_GPIO_6 //,txianwu, 
#define lcd_enable HI_IO_NAME_GPIO_8 //lcd 
#define lcd_rs HI_IO_NAME_GPIO_10 //lcd 
#define lcd_cs1 HI_IO_NAME_GPIO_12 ,
#define lcd_d4 HI_IO_NAME_GPIO_12 ,
#define lcd_d5 HI_IO_NAME_GPIO_12 ,
#define lcd_d6 HI_IO_NAME_GPIO_12 ,
#define lcd_d7 HI_IO_NAME_GPIO_12 ,
 
 
#define t_rs_pin HI_IO_NAME_GPIO_6  //,txianwu, RS
#define t_enable_pin HI_IO_NAME_GPIO_8  //lcd ,E
#define t_data_pins0 HI_IO_NAME_GPIO_9  , D4
#define t_data_pins1 HI_IO_NAME_GPIO_10  ,D5
#define t_data_pins2 HI_IO_NAME_GPIO_11  ,D6
#define t_data_pins3 HI_IO_NAME_GPIO_12  ,D7
//3v3--VDD
//GND--V0
//GND--RW
//3v3--A
//GND--K (lcd Pin16)
/*
*https://blog.csdn.net/weixin_45488643/article/details/108222308
*https://www.cnblogs.com/txwtech/p/11151064.html
*https://blog.csdn.net/txwtech/article/details/94970892
*http://www.360doc.com/content/18/0627/20/56844912_765915632.shtml
*/
void delay_ms(unsigned int ms)
{
	osDelay((ms*5)/10);
}
size_t write1602(uint8_t value)
{
	send1602(value, 1);
	return 1; // assume sucess
}
// write either command or data, with automatic 4/8-bit selection
void send1602(uint8_t value, uint8_t mode) 
{
	//digitalWrite(_rs_pin, mode);
	if(mode==0)
	{
      IoTGpioSetOutputVal(t_rs_pin, IOT_GPIO_VALUE0);
	}
	if(mode==1)
	{
      IoTGpioSetOutputVal(t_rs_pin, IOT_GPIO_VALUE1);
	}
    
 
	// if there is a RW pin indicated, set it low to Write
	if (_rw_pin != 255) { //未使用RW--xxx
	//	digitalWrite(_rw_pin, LOW);
        IoTGpioSetOutputVal(_rw_pin, IOT_GPIO_VALUE0);//xxx
	}
 
	if (_displayfunction & LCD_8BITMODE) {
		write8bits(value);
	}
	else {
		write4bits(value >> 4);
		write4bits(value);
	}
}
void command(uint8_t value)
 {
//	send(value, LOW);
send1602(value, 0);
}
void pulseEnable(void)
 {
	
    IoTGpioSetOutputVal(t_enable_pin, IOT_GPIO_VALUE1);
	//delayMicroseconds(1);    // enable pulse must be >450ns
    delay_ms(15);
    IoTGpioSetOutputVal(t_enable_pin, IOT_GPIO_VALUE0);
	//digitalWrite(_enable_pin, LOW);
	//delayMicroseconds(100);   // commands need > 37us to settle
    delay_ms(15);
}
void write4bits(uint8_t value) 
{
	for (int i = 0; i < 4; i++) 
	{
		//digitalWrite(_data_pins[i], (value >> i) & 0x01);
		switch (i)
		{
		case 0:/* constant-expression */
			/* code */
			 IoTGpioSetOutputVal(t_data_pins0, (value >> i) & 0x01);
			break;
			case 1:/* constant-expression */
			/* code */
			IoTGpioSetOutputVal(t_data_pins1, (value >> i) & 0x01);
			break;
			case 2:/* constant-expression */
			IoTGpioSetOutputVal(t_data_pins2, (value >> i) & 0x01);
			/* code */
			break;
			case 3:/* constant-expression */
			/* code */
			IoTGpioSetOutputVal(t_data_pins3, (value >> i) & 0x01);
			break;
		
		default:
			break;
		}
        int aa=(value>>i) & 0x01;
		printf("line123, i=%d,write 4bits value:%d\n",i,aa);
		delay_ms(5);
       
	}
 
	pulseEnable();
}
void write8bits(uint8_t value)
 {
	for (int i = 0; i < 8; i++) 
	{
		
		switch (i)
		{
		case 0:/* constant-expression */
			/* code */
			 IoTGpioSetOutputVal(t_data_pins0, (value >> i) & 0x01);
			break;
			case 1:/* constant-expression */
			/* code */
			IoTGpioSetOutputVal(t_data_pins1, (value >> i) & 0x01);
			break;
			case 2:/* constant-expression */
			IoTGpioSetOutputVal(t_data_pins2, (value >> i) & 0x01);
			/* code */
			break;
			case 3:/* constant-expression */
			/* code */
			IoTGpioSetOutputVal(t_data_pins3, (value >> i) & 0x01);
			break;
		
		default:
			break;
		}
		 int aa=(value>>i) & 0x01;
		printf("line161, write 8bits value:%d\n",aa);
		delay_ms(200);
	}
 
	pulseEnable();
}
void setRowOffsets(int row0, int row1, int row2, int row3)
{
	_row_offsets[0] = row0;
	_row_offsets[1] = row1;
	_row_offsets[2] = row2;
	_row_offsets[3] = row3;
}
void init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
	uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
	uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
	_rs_pin = rs; //
	_rw_pin = rw;
	_enable_pin = enable;
 
	_data_pins[0] = d0;
	_data_pins[1] = d1;
	_data_pins[2] = d2;
	_data_pins[3] = d3;
	_data_pins[4] = d4;
	_data_pins[5] = d5;
	_data_pins[6] = d6;
	_data_pins[7] = d7;
 
	if (fourbitmode)
		_displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
	else
		_displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
 
	begin(16, 1,LCD_5x8DOTS);
}
void begin(uint8_t cols, uint8_t lines, uint8_t dotsize) 
{
	if (lines > 1) {
		_displayfunction |= LCD_2LINE;
	}
	_numlines = lines;
 
	setRowOffsets(0x00, 0x40, 0x00 + cols, 0x40 + cols);
 
	// for some 1 line displays you can select a 10 pixel high font
	if ((dotsize != LCD_5x8DOTS) && (lines == 1)) {
		_displayfunction |= LCD_5x10DOTS;
	}
 
	//pinMode(_rs_pin, OUTPUT);
     //IoTGpioSetOutputVal(t_rs_pin,);
    
    
	// we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
	if (_rw_pin != 255) {
		//pinMode(_rw_pin, OUTPUT); 
		
	}
	
	// Do these once, instead of every time a character is drawn for speed reasons.
	for (int i = 0; i<((_displayfunction & LCD_8BITMODE) ? 8 : 4); ++i)
	{
		//pinMode(_data_pins[i], OUTPUT);
        
	}
 
	// SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
	// according to datasheet, we need at least 40ms after power rises above 2.7V
	// before sending commands. Arduino can turn on way before 4.5V so we'll wait 50
	//delayMicroseconds(50000);
    delay_ms(1);
	// Now we pull both RS and R/W low to begin commands
	//digitalWrite(_rs_pin, LOW);
    IoTGpioSetOutputVal(t_rs_pin,IOT_GPIO_VALUE0);
	//digitalWrite(_enable_pin, LOW);
    IoTGpioSetOutputVal(t_enable_pin,IOT_GPIO_VALUE0);
	if (_rw_pin != 255) {//rw未使用
 
		//digitalWrite(_rw_pin, LOW);///rw未使用
 
	}
 
	//put the LCD into 4 bit or 8 bit mode
	if (!(_displayfunction & LCD_8BITMODE)) {
		// this is according to the hitachi HD44780 datasheet
		// figure 24, pg 46
 
		// we start in 8bit mode, try to set 4 bit mode
		write4bits(0x03);
		//delayMicroseconds(4500); // wait min 4.1ms
        delay_ms(15);
 
								 // second try
		write4bits(0x03);
		//delayMicroseconds(4500); // wait min 4.1ms
        delay_ms(15);
 
								 // third go!
		write4bits(0x03);
		//delayMicroseconds(150);
        delay_ms(15);
 
		// finally, set to 4-bit interface
		write4bits(0x02);
		printf("line272,LCD_8BITMODE\n");
	}
	else {
		// this is according to the hitachi HD44780 datasheet
		// page 45 figure 23
 
		// Send function set command sequence
		command(LCD_FUNCTIONSET | _displayfunction);
	//	delayMicroseconds(4500);  // wait more than 4.1ms
    delay_ms(15);
 
	  // second try
		command(LCD_FUNCTIONSET | _displayfunction);
	//	delayMicroseconds(150);
    delay_ms(15);
 
		// third go
		command(LCD_FUNCTIONSET | _displayfunction);
	}
 
	// finally, set # lines, font size, etc.
	command(LCD_FUNCTIONSET | _displayfunction);
 
	// turn the display on with no cursor or blinking default
	_displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
	display();
 
	// clear it off
	clear();
 
	// Initialize to default text direction (for romance languages)
	_displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
	// set the entry mode
	command(LCD_ENTRYMODESET | _displaymode);
	printf("line306,none LCD_8BITMODE\n");
 
}
// Turn the display on/off (quickly)
void noDisplay() 
{
	_displaycontrol &= ~LCD_DISPLAYON;
	command(LCD_DISPLAYCONTROL | _displaycontrol);
}
void display() 
{
	_displaycontrol |= LCD_DISPLAYON;
	command(LCD_DISPLAYCONTROL | _displaycontrol);
}
/********** high level commands, for the user! */
void clear()
{
	command(LCD_CLEARDISPLAY);  // clear display, set cursor position to zero
	//delayMicroseconds(2000);  // this command takes a long time!
    delay_ms(10);
}
void send_to_lcd (char value, int rs)
{
	//HAL_GPIO_WritePin(RS_GPIO_Port, RS_Pin, rs);  // rs = 1 for data, rs=0 for command
    if(1==rs)
    IoTGpioSetOutputVal(t_rs_pin,IOT_GPIO_VALUE1);
    if(0==rs)
    IoTGpioSetOutputVal(t_rs_pin,IOT_GPIO_VALUE0);
 
	/* write the data to the respective pin */
	/* HAL_GPIO_WritePin(D7_GPIO_Port, D7_Pin, ((data>>3)&0x01));
	HAL_GPIO_WritePin(D6_GPIO_Port, D6_Pin, ((data>>2)&0x01));
	HAL_GPIO_WritePin(D5_GPIO_Port, D5_Pin, ((data>>1)&0x01));
	HAL_GPIO_WritePin(D4_GPIO_Port, D4_Pin, ((data>>0)&0x01)); */
    for (int i = 3; i >= 0; i--) 
	{
		
		switch (i)
		{
		case 0:/* constant-expression */
			/* code */
			 IoTGpioSetOutputVal(t_data_pins0, (value >> i) & 0x01);
			break;
			case 1:/* constant-expression */
			/* code */
			IoTGpioSetOutputVal(t_data_pins1, (value >> i) & 0x01);
			break;
			case 2:/* constant-expression */
			IoTGpioSetOutputVal(t_data_pins2, (value >> i) & 0x01);
			/* code */
			break;
			case 3:/* constant-expression */
			/* code */
			IoTGpioSetOutputVal(t_data_pins3, (value >> i) & 0x01);
			break;				
		}
    }
 
	/* Toggle EN PIN to send the data
	 * if the HCLK > 100 MHz, use the  20 us delay
	 * if the LCD still doesn't work, increase the delay to 50, 80 or 100..
	 */
	//HAL_GPIO_WritePin(EN_GPIO_Port, EN_Pin, 1);
	//delay (20);
	//HAL_GPIO_WritePin(EN_GPIO_Port, EN_Pin, 0);
	//delay (20);
    IoTGpioSetOutputVal(t_enable_pin,IOT_GPIO_VALUE1);//延迟时间减小导致乱码
    delay_ms(2);
    IoTGpioSetOutputVal(t_enable_pin,IOT_GPIO_VALUE0);
    delay_ms(1);
}
void lcd_send_cmd (char cmd)
{
    char datatosend;
 
    /* send upper nibble first */
    datatosend = ((cmd>>4)&0x0f);
    send_to_lcd(datatosend,0);  // RS must be 0 while sending command
 
    /* send Lower Nibble */
    datatosend = ((cmd)&0x0f);
	send_to_lcd(datatosend, 0);
}
void lcd_send_data (char data)
{
	char datatosend;
 
	/* send higher nibble */
	datatosend = ((data>>4)&0x0f);
	send_to_lcd(datatosend, 1);  // rs =1 for sending data
 
	/* send Lower nibble */
	datatosend = ((data)&0x0f);
	send_to_lcd(datatosend, 1);
}
void lcd_clear (void)
{
	lcd_send_cmd(0x01);
	delay_ms(2);
}
void lcd_put_cur(int row, int col)
{
    switch (row)
    {
        case 0:
            col |= 0x80;
            break;
        case 1:
            col |= 0xC0;
            break;
    }
 
    lcd_send_cmd (col);
}
 
void lcd_init (void)
{
	// 4 bit initialisation
	delay_ms(50);  // wait for >40ms
	lcd_send_cmd (0x30);
	delay_ms(5);  // wait for >4.1ms
	lcd_send_cmd (0x30);
	delay_ms(1);  // wait for >100us
	lcd_send_cmd (0x30);
	delay_ms(10);
	lcd_send_cmd (0x20);  // 4bit mode
	delay_ms(10);
 
  // dislay initialisation
	lcd_send_cmd (0x28); // Function set --> DL=0 (4 bit mode), N = 1 (2 line display) F = 0 (5x8 characters)
	delay_ms(1);
	lcd_send_cmd (0x08); //Display on/off control --> D=0,C=0, B=0  ---> display off
	delay_ms(1);
	lcd_send_cmd (0x01);  // clear display
	delay_ms(1);
	delay_ms(1);
	lcd_send_cmd (0x06); //Entry mode set --> I/D = 1 (increment cursor) & S = 0 (no shift)
	delay_ms(1);
	lcd_send_cmd (0x0C); //Display on/off control --> D = 1, C and B = 0. (Cursor and blink, last two bits)
}
void lcd_send_string (char *str)
{
	while (*str) lcd_send_data (*str++);
}
 
 
 
 
static void lcd1602task(void *arg)
{
   (void) arg;
   IoTGpioInit(t_rs_pin);  
   IoTGpioInit(t_enable_pin);  
   IoTGpioInit(t_data_pins0);  //9
   IoTGpioInit(t_data_pins1);  //10
   IoTGpioInit(t_data_pins2);  //11
   IoTGpioInit(t_data_pins3);  
    
 
	hi_io_set_func(t_rs_pin,HI_IO_FUNC_GPIO_6_GPIO);
    IoTGpioSetDir(t_rs_pin,IOT_GPIO_DIR_OUT);  
   IoTGpioSetDir(t_enable_pin,IOT_GPIO_DIR_OUT); 
   IoTGpioSetDir(t_data_pins0,IOT_GPIO_DIR_OUT); //9
   IoTGpioSetDir(t_data_pins1,IOT_GPIO_DIR_OUT); //10
   IoTGpioSetDir(t_data_pins2,IOT_GPIO_DIR_OUT); //11
    IoTGpioSetDir(t_data_pins3,IOT_GPIO_DIR_OUT);
 
 
   init(1,lcd_rs,255,lcd_enable,lcd_d4,lcd_d5,lcd_d6,lcd_d7,0,0,0,0);
   begin(16,2,LCD_5x8DOTS);
   printf("init is finished\n");
   //write1602("lcd1602 display");
   //display();
   
      delay_ms(5);
      lcd_clear();
while(1)
{
     // lcd_init ();
      lcd_put_cur(0, 0);
      lcd_send_string("Hello ");
      lcd_send_string("TXWTECH ");
     // lcd_send_string("From");
 
      lcd_put_cur(1, 0);
      lcd_send_string("V:tianwu 2021.10");
      delay_ms(300);
	  printf("lcd_send_data_test\n");
	  lcd_clear();
}
   while (0)
   {
     /* IoTGpioSetOutputVal(_enable_pin,1);
	 IoTGpioSetOutputVal(_rs_pin,1);
	  IoTGpioSetOutputVal(_data_pins[0],1); */
	  printf("lcd1602\n");
	  //IoTGpioSetOutputVal(lcd_d4,IOT_GPIO_VALUE1); //9
	 // IoTGpioSetOutputVal(lcd_d5,IOT_GPIO_VALUE1); //10
	 // IoTGpioSetOutputVal(t_data_pins3,IOT_GPIO_VALUE1); //11
 
 
     display();
     delay_ms(1000);
     noDisplay();
     delay_ms(200); 
 
     write1602("v:txianwu");
 
     display();
     delay_ms(1000);
     noDisplay();
     delay_ms(200); 
    
     
      
   }
   
}
 
 
static void GpioEntry(void)
{
    osThreadAttr_t attr={0};
    attr.name="lcd1602task";
    attr.stack_size=4096;
    attr.priority=osPriorityNormal;
    if(osThreadNew(lcd1602task,NULL,&attr)==NULL)
    {
        printf("[GpioEntry] create lcd1602task failed!\n");
    }
}
SYS_RUN(lcd1602task);

头文件:

#ifndef font_lcd1602_h
#define font_lcd1602_h
 
 
// commands
#define LCD_CLEARDISPLAY 0x01
#define LCD_RETURNHOME 0x02
#define LCD_ENTRYMODESET 0x04
#define LCD_DISPLAYCONTROL 0x08
#define LCD_CURSORSHIFT 0x10
#define LCD_FUNCTIONSET 0x20
#define LCD_SETCGRAMADDR 0x40
#define LCD_SETDDRAMADDR 0x80
 
// flags for display entry mode
#define LCD_ENTRYRIGHT 0x00
#define LCD_ENTRYLEFT 0x02
#define LCD_ENTRYSHIFTINCREMENT 0x01
#define LCD_ENTRYSHIFTDECREMENT 0x00
 
// flags for display on/off control
#define LCD_DISPLAYON 0x04
#define LCD_DISPLAYOFF 0x00
#define LCD_CURSORON 0x02
#define LCD_CURSOROFF 0x00
#define LCD_BLINKON 0x01
#define LCD_BLINKOFF 0x00
 
// flags for display/cursor shift
#define LCD_DISPLAYMOVE 0x08
#define LCD_CURSORMOVE 0x00
#define LCD_MOVERIGHT 0x04
#define LCD_MOVELEFT 0x00
 
// flags for function set
#define LCD_8BITMODE 0x10
#define LCD_4BITMODE 0x00
#define LCD_2LINE 0x08
#define LCD_1LINE 0x00
#define LCD_5x10DOTS 0x04
#define LCD_5x8DOTS 0x00
typedef unsigned char uint8_t;
 
//LiquidCrystal(uint8_t rs, uint8_t enable,uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3); //arduino使用这个
 
	void init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
		uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
		uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
 
	//void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);
    void begin(uint8_t cols, uint8_t rows, uint8_t charsize);
 
 
	void clear();
	void home();
 
	void noDisplay();
	void display();
	void noBlink();
	void blink();
	void noCursor();
	void cursor();
	void scrollDisplayLeft();
	void scrollDisplayRight();
	void leftToRight();
	void rightToLeft();
	void autoscroll();
	void noAutoscroll();
 
	void setRowOffsets(int row1, int row2, int row3, int row4);
	void createChar(uint8_t, uint8_t[]);
	void setCursor(uint8_t, uint8_t);
	size_t write1602(uint8_t);
	void command(uint8_t);
 
	//using Print::write;
 
	void send1602(uint8_t, uint8_t);
	void write4bits(uint8_t);
	void write8bits(uint8_t);
	void pulseEnable();
    void delay_ms(unsigned int ms);
 
    
    /* #define lcd_rs HI_IO_NAME_GPIO_6 //,txianwu, 
#define lcd_enable HI_IO_NAME_GPIO_8 //lcd 
#define lcd_rs HI_IO_NAME_GPIO_10 //lcd 
#define lcd_cs1 HI_IO_NAME_GPIO_12 ,
#define lcd_d4 HI_IO_NAME_GPIO_12 ,
#define lcd_d5 HI_IO_NAME_GPIO_12 ,
#define lcd_d6 HI_IO_NAME_GPIO_12 ,
#define lcd_d7 HI_IO_NAME_GPIO_12 , */
 
    
 
	uint8_t _rs_pin; // LOW: command.  HIGH: character.GPIO_6
		
	
	uint8_t _rw_pin; // LOW: write to LCD.  HIGH: read from LCD.--GND
	uint8_t _enable_pin; // activated by a HIGH pulse.GPIO_8
	uint8_t _data_pins[8]; //d4,d5,d6,d7,by txianwu
 
	uint8_t _displayfunction;
	uint8_t _displaycontrol;
	uint8_t _displaymode;
 
	uint8_t _initialized;
 
	uint8_t _numlines;
	uint8_t _row_offsets[4];
 
 
void lcd_init (void);   // initialize lcd
 
void lcd_send_cmd (char cmd);  // send command to the lcd
 
void lcd_send_data (char data);  // send data to the lcd
 
void lcd_send_string (char *str);  // send string to the lcd
 
void lcd_put_cur(int row, int col);  // put cursor at the entered position row (0 or 1), col (0-15);
 
void lcd_clear (void);
 
int row=0;
int col=0;
 
#endif

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