2024.9.12 [SoC를 위한 Peripheral 설계]6 - dht11_lcd(myip)

2024.9.12 수업날

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< dht11_lcd(myip) >

이번에는 온습도센서(dht11)에서 측정한 값을 LCD에 출력하는 IP를 만들어본다.

 

vivado 진행 순서

새로운 Block Diagram 생성 후,

기본적인 Diagram까지 만들고 create and package new ip로 edit_myip를 진행한다.

 

 

Add Sources

 

 

slave 모듈 수정해야하는 부분

 

 

top 모듈 수정해야하는 부분

 

 

체크표시 확인 후 Re-Package IP 클릭

 

 

Block Diagram에 myip_dht11 추가

 

 

Generate Block Design에서 Global 선택 후 Generate 하기

 

 

Block Design에서 Sources의 .xdc에서 아래와 같이 수정

 

 

Mblaze_iic -> helloworld.c 소스코드(dht11_lcd 기능)

#include <stdio.h>
#include "platform.h"
#include "xil_printf.h"
#include "xparameters.h"
#include "xiic.h"

#define IIC_ID XPAR_IIC_0_DEVICE_ID
#define DHT11_BASEADDR XPAR_MYIP_DHT11_0_S00_AXI_BASEADDR

#define LCD_RS			0
#define LCD_RW			1
#define LCD_E			2
#define LCD_BACKLIGHT	3

#define LCD_DEV_ADDR	(0x27<<1)	// address 0x27 beginning from bit 1, bit 0 is R/W_bar

#define COMMAND_DISPLAY_CLEAR	0x01
#define COMMAND_DISPLAY_ON		0x0C
#define COMMAND_DISPLAY_OFF		0x08
#define COMMAND_ENTRY_MODE		0x06
#define COMMAND_4BIT_MODE		0x28

static u8 I2C_LCD_Data;

XIic iic_instance;

void LCD_Data_4bit (u8 data);
void LCD_EnablePin();
void LCD_WriteCommand(uint8_t commandData);
void LCD_WriteData(uint8_t charData);
void LCD_Init();
void LCD_BackLightOn();
void LCD_GotoXY(uint8_t row, uint8_t col);
void LCD_WriteString(char *string);


int main()
{
    init_platform();
    u8 data_t[4] = {0,};	//0 -> backlight off
    u8 tx_data = 0xff;
    u8 cnt = 0;

    print("Start!\n\r");

    volatile unsigned int *dht11_instance = (volatile unsigned int) DHT11_BASEADDR;

    XIic_Initialize(&iic_instance, IIC_ID);
//    XIic_Send(iic_instance.BaseAddress, 0x27, data_t, 1, XIIC_STOP);
    LCD_Init();
    LCD_WriteString("Humidity : ??");
    LCD_GotoXY(1, 0);
    LCD_WriteString("Temperture : ??");

    while(1){
    	// dht11-lcd
    	MB_Sleep(3000);
    	LCD_GotoXY(0, 11);			// Humidity
    	LCD_WriteData(dht11_instance[0]/10%10 + '0');
    	LCD_WriteData(dht11_instance[0]%10 + '0');
    	LCD_GotoXY(1, 13);			// Temperture
    	LCD_WriteData(dht11_instance[1]/10%10 + '0');
		LCD_WriteData(dht11_instance[1]%10 + '0');
    	xil_printf("humidity : %d  temperature : %d\n\r", dht11_instance[0], dht11_instance[1]);
		print("Hello World!\n\r");
    }

    cleanup_platform();
    return 0;
}


void LCD_Data_4bit (u8 data)
{
	I2C_LCD_Data = (I2C_LCD_Data & 0x0f) | (data & 0xf0);		// put upper four bits
	LCD_EnablePin();
	I2C_LCD_Data = (I2C_LCD_Data & 0x0f) | ((data & 0x0f)<<4);	// put lower four bits
	LCD_EnablePin();

}

void LCD_EnablePin()
{
	I2C_LCD_Data &= ~(1<<LCD_E);
	XIic_Send(iic_instance.BaseAddress, 0x27, &I2C_LCD_Data, 1, XIIC_STOP);
	I2C_LCD_Data |= (1<<LCD_E);
	XIic_Send(iic_instance.BaseAddress, 0x27, &I2C_LCD_Data, 1, XIIC_STOP);
	I2C_LCD_Data &= ~(1<<LCD_E);
	XIic_Send(iic_instance.BaseAddress, 0x27, &I2C_LCD_Data, 1, XIIC_STOP);
	MB_Sleep(2);
}

void LCD_WriteCommand(uint8_t commandData)
{
	I2C_LCD_Data &= ~(1<<LCD_RS);					// enter instruction code mode
	I2C_LCD_Data &= ~(1<<LCD_RW);					// enter write mode
	LCD_Data_4bit(commandData);						// output data
}


void LCD_WriteData(uint8_t charData)
{
	I2C_LCD_Data |= (1<<LCD_RS);						// enter data mode
	I2C_LCD_Data &= ~(1<<LCD_RW);						// enter write mode
	LCD_Data_4bit(charData);						// output data
}

void LCD_Init()
{
	// see HD44780 datasheet page 45 for following init commands
	MB_Sleep(20);
	LCD_WriteCommand(0x03);
	MB_Sleep(5);
	LCD_WriteCommand(0x03);
	MB_Sleep(1);
	LCD_WriteCommand(0x03);

	LCD_WriteCommand(0x02);
	LCD_WriteCommand(COMMAND_4BIT_MODE);
	LCD_WriteCommand(COMMAND_DISPLAY_OFF);
	LCD_WriteCommand(COMMAND_DISPLAY_CLEAR);
	LCD_WriteCommand(COMMAND_ENTRY_MODE);
	LCD_WriteCommand(COMMAND_DISPLAY_ON);
	LCD_BackLightOn();
}

void LCD_BackLightOn()
{
	I2C_LCD_Data |= (1<<LCD_BACKLIGHT);
}

void LCD_GotoXY(uint8_t row, uint8_t col)
{
	col %= 16;										// column width is within 16
	row %= 2;										// row length is within 2
	uint8_t address = (0x40 * row) + col;			// see HD44780 datasheet page 12
	uint8_t command = 0x80 + address;
	LCD_WriteCommand(command);
}

void LCD_WriteString(char *string)
{
	for (uint8_t i=0; string[i]; i++)
	{
		LCD_WriteData(string[i]);
	}
}

 

Mblaze_iic -> dht11_lcd 결과

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dht11_lcd(myip)