文章目錄
- 0 簡介
- 1 專案介紹
- 2 硬體說明
- 2.1 AB32VG1單片機
- 2.2 DHT22數字溫濕度傳感器
- 3 代碼實作
- 4 實作效果
0 簡介
Hi，大家好，這里是丹成學長，今天向大家介紹一個 單片機專案
基于單片機的室內環境溫濕度檢測系統
大家可用于 課程設計 或 畢業設計
技術解答、畢設幫助、開題指導
print("Q 746876041")
1 專案介紹
本設計基于中科藍訊的AB32VG1開發板, 通過DHT22檢測室內環境，當溫度或濕度高于設定值或低于設定值，就會發出警報，通過螢屏顯示出當前室內的溫度值，
只作為畢設開發的一個小功能，一般不能作為一個畢業設計
2 硬體說明
2.1 AB32VG1單片機
AB32VG1主頻 120M ，片上集成 RAM 192K, Flash 4Mbit，ADC，PWM，USB，UART，IIC 等資源，提供SDK，驅動齊全，支持RT-Thread Studio 開發應用，圖形化配置系統，一鍵開啟外設，一鍵使用軟體包，強大的自動代碼編輯輔助，
2.2 DHT22數字溫濕度傳感器
DHT22數字溫濕度傳感器是一款含有已校準數字信號輸出的溫濕度復合傳感器，它應用專用的數字模塊采集技術和溫濕度傳感技術，確保產品具有極高的可靠性和卓越的長期穩定性，DHT11是一款溫濕度傳感器， 其測量精度為：濕度±5%RH， 溫度±2℃，量程為：濕度20-90%RH， 溫度0~50℃，采樣周期大于等于1秒/次，傳感器包括一個電阻式感濕元件和一個NTC測溫元件，并連接一個高性能8位單片機相，DHT11的優點有：品質高、回應快、抗干擾能力強、性價比極高、體積小、功耗低等，
3 代碼實作
#include <board.h>
#include "dhtxx.h"
#define DBG_TAG "sensor.asair.dhtxx"
#ifdef PKG_USING_DHTXX_DEBUG
#define DBG_LVL DBG_LOG
#else
#define DBG_LVL DBG_ERROR
#endif
#include <rtdbg.h>
/* timing */
#define DHT1x_BEGIN_TIME 20 /* ms */
#define DHT2x_BEGIN_TIME 1 /* ms */
#define DHTxx_PULL_TIME 30 /* us */
#define DHTxx_REPLY_TIME 100 /* us */
#define MEASURE_TIME 40 /* us */
/**
* This function will split a number into two part according to times.
*
* @param num the number will be split
* @param integer the integer part
* @param decimal the decimal part
* @param times how many times of the real number (you should use 10 in this case)
*
* @return 0 if num is positive, 1 if num is negative
*/
int split_int(const int num, int *integer, int *decimal, const rt_uint32_t times)
{
int flag = 0;
if (num < 0) flag = 1;
int anum = num<0 ? -num : num;
*integer = anum / times;
*decimal = anum % times;
return flag;
}
/**
* This function will convert temperature in degree Celsius to Kelvin.
*
* @param c the temperature indicated by degree Celsius
*
* @return the result
*/
float convert_c2k(float c)
{
return c + 273.15;
}
/**
* This function will convert temperature in degree Celsius to Fahrenheit.
*
* @param c the temperature indicated by degree Celsius
*
* @return the result
*/
float convert_c2f(float c)
{
return c * 1.8 + 32;
}
/**
* This function will convert temperature in degree Fahrenheit to Celsius.
*
* @param f the temperature indicated by degree Fahrenheit
*
* @return the result
*/
float convert_f2c(float f)
{
return (f - 32) * 0.55555;
}
/**
* This function will read a bit from sensor.
*
* @param pin the pin of Dout
*
* @return the bit value
*/
static uint8_t dht_read_bit(const rt_base_t pin)
{
uint8_t retry = 0;
while(rt_pin_read(pin) && retry < DHTxx_REPLY_TIME)
{
retry++;
rt_hw_us_delay(1);
}
retry = 0;
while(!rt_pin_read(pin) && retry < DHTxx_REPLY_TIME)
{
retry++;
rt_hw_us_delay(1);
}
rt_hw_us_delay(MEASURE_TIME);
return rt_pin_read(pin);
}
/**
* This function will read a byte from sensor.
*
* @param pin the pin of Dout
*
* @return the byte
*/
static uint8_t dht_read_byte(const rt_base_t pin)
{
uint8_t i, byte = 0;
for(i=0; i<8; i++)
{
byte <<= 1;
byte |= dht_read_bit(pin);
}
return byte;
}
/**
* This function will read and update data array.
*
* @param dev the device to be operated
*
* @return RT_TRUE if read successfully, otherwise return RT_FALSE.
*/
rt_bool_t dht_read(dht_device_t dev)
{
RT_ASSERT(dev);
uint8_t i, retry = 0, sum = 0;
#ifdef PKG_USING_DHTXX_INTERRUPT_DISABLE
rt_base_t level;
#endif
/* Reset data buffer */
rt_memset(dev->data, 0, DHT_DATA_SIZE);
/* MCU request sampling */
rt_pin_mode(dev->pin, PIN_MODE_OUTPUT);
rt_pin_write(dev->pin, PIN_LOW);
if (dev->type == DHT11 || dev->type == DHT12) {
rt_thread_mdelay(DHT1x_BEGIN_TIME); /* Tbe */
} else {
rt_thread_mdelay(DHT2x_BEGIN_TIME);
}
#ifdef PKG_USING_DHTXX_INTERRUPT_DISABLE
level = rt_hw_interrupt_disable();
#endif
rt_pin_mode(dev->pin, PIN_MODE_INPUT_PULLUP);
rt_hw_us_delay(DHTxx_PULL_TIME); /* Tgo */
/* Waiting for sensor reply */
while (rt_pin_read(dev->pin) && retry < DHTxx_REPLY_TIME)
{
retry++;
rt_hw_us_delay(1); /* Trel */
}
if(retry >= DHTxx_REPLY_TIME) return RT_FALSE;
retry = 0;
while (!rt_pin_read(dev->pin) && retry < DHTxx_REPLY_TIME)
{
retry++;
rt_hw_us_delay(1); /* Treh */
};
if(retry >= DHTxx_REPLY_TIME) return RT_FALSE;
/* Read data */
for(i=0; i<DHT_DATA_SIZE; i++)
{
dev->data[i] = dht_read_byte(dev->pin);
}
#ifdef PKG_USING_DHTXX_INTERRUPT_DISABLE
rt_hw_interrupt_enable(level);
#endif
/* Checksum */
for(i=0; i<DHT_DATA_SIZE-1; i++)
{
sum += dev->data[i];
}
if(sum != dev->data[4]) return RT_FALSE;
return RT_TRUE;
}
/**
* This function will get the humidity from dhtxx sensor.
*
* @param dev the device to be operated
*
* @return the humidity value
*/
rt_int32_t dht_get_humidity(dht_device_t const dev)
{
RT_ASSERT(dev);
rt_int32_t humi = 0;
switch(dev->type)
{
case DHT11:
case DHT12:
humi = dev->data[0] * 10 + dev->data[1];
break;
case DHT21:
case DHT22:
humi = (dev->data[0] << 8) + dev->data[1];
break;
default:
break;
}
return humi;
}
/**
* This function will get the temperature from dhtxx sensor.
*
* @param dev the device to be operated
*
* @return the temperature value
*/
rt_int32_t dht_get_temperature(dht_device_t const dev)
{
RT_ASSERT(dev);
rt_int32_t temp = 0;
switch(dev->type)
{
case DHT11:
case DHT12:
temp = dev->data[2] * 10 + (dev->data[3] & 0x7f);
if(dev->data[3] & 0x80) {
temp = -temp;
}
break;
case DHT21:
case DHT22:
temp = ((dev->data[2] & 0x7f) << 8) + dev->data[3];
if(dev->data[2] & 0x80) {
temp = -temp;
}
break;
default:
break;
}
return temp;
}
/**
* This function will init dhtxx sensor device.
*
* @param dev the device to init
* @param pin the pin of Dout
*
* @return the device handler
*/
rt_err_t dht_init(struct dht_device *dev, const rt_base_t pin)
{
if(dev == NULL)
return -RT_ERROR;
dev->type = DHT_TYPE;
dev->pin = pin;
rt_memset(dev->data, 0, DHT_DATA_SIZE);
rt_pin_mode(dev->pin, PIN_MODE_INPUT_PULLUP);
return RT_EOK;
}
dht_device_t dht_create(const rt_base_t pin)
{
dht_device_t dev;
dev = rt_calloc(1, sizeof(struct dht_device));
if (dev == RT_NULL)
{
LOG_E("Can't allocate memory for dhtxx device");
return RT_NULL;
}
dev->type = DHT_TYPE;
dev->pin = pin;
rt_memset(dev->data, 0, DHT_DATA_SIZE);
rt_pin_mode(dev->pin, PIN_MODE_INPUT_PULLUP);
return dev;
}
void dht_delete(dht_device_t dev)
{
if (dev)
rt_free(dev);
}
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include "dhtxx.h"
#define DATA_PIN PKG_USING_DHTXX_SAMPLE_PIN
/* cat_dhtxx sensor data by dynamic */
static void cat_dhtxx(void)
{
dht_device_t sensor = dht_create(DATA_PIN);
if(dht_read(sensor)) {
rt_int32_t temp = dht_get_temperature(sensor);
rt_int32_t humi = dht_get_humidity(sensor);
rt_kprintf("Temp: %d, Humi: %d\n", temp, humi);
}
else {
rt_kprintf("Read dht sensor failed.\n");
}
dht_delete(sensor);
}
#ifdef FINSH_USING_MSH
MSH_CMD_EXPORT(cat_dhtxx, read dhtxx humidity and temperature);
#endif
#ifndef __DHTXX_H__
#define __DHTXX_H__
#include <rtthread.h>
#include <rtdevice.h>
#include <sensor.h>
#define DHTLIB_VERSION "0.9.0"
#define DHT_DATA_SIZE 5
/* sensor model type */
#define DHT11 0
#define DHT12 1
#define DHT21 2
#define DHT22 3
#define AM2301 DHT21
#define AM2302 DHT22
#define AM2320 DHT22
#if defined(PKG_USING_DHTXX_TYPE_DHT11)
#define DHT_TYPE DHT11
#elif defined(PKG_USING_DHTXX_TYPE_DHT12)
#define DHT_TYPE DHT12
#elif defined(PKG_USING_DHTXX_TYPE_DHT21)
#define DHT_TYPE DHT21
#elif defined(PKG_USING_DHTXX_TYPE_DHT22)
#define DHT_TYPE DHT22
#endif
struct dht_device
{
rt_base_t pin;
rt_uint8_t type;
rt_uint8_t data[DHT_DATA_SIZE];
rt_mutex_t lock;
};
typedef struct dht_device *dht_device_t;
dht_device_t dht_create(const rt_base_t pin);
void dht_delete(dht_device_t dev);
rt_err_t dht_init(struct dht_device *dev, const rt_base_t pin);
rt_bool_t dht_read(dht_device_t dev);
rt_int32_t dht_get_humidity(dht_device_t dev);
rt_int32_t dht_get_temperature(dht_device_t dev);
float convert_c2k(float c);
float convert_c2f(float c);
float convert_f2c(float f);
rt_int32_t split_int(const rt_int32_t num, rt_int32_t *integer,
rt_int32_t *decimal, const rt_uint32_t times);
rt_err_t rt_hw_dht_init(const char *name, struct rt_sensor_config *cfg);
#endif /* __DHTXX_H__ */
#include "oled.h"
#include "oledfont.h"
u8 OLED_GRAM[144][8];
struct OLED_sss
{
uint8_t OLED_SCLK;
uint8_t OLED_SDIN;
uint8_t OLED_RST;
uint8_t OLED_DC;
uint8_t OLED_CS;
};
struct OLED_sss oled_ccc;
//反顯函式
void OLED_ColorTurn(u8 i)
{
if(i==0)
{
OLED_WR_Byte(0xA6,OLED_CMD);//正常顯示
}
if(i==1)
{
OLED_WR_Byte(0xA7,OLED_CMD);//反色顯示
}
}
//螢屏旋轉180度
void OLED_DisplayTurn(u8 i)
{
if(i==0)
{
OLED_WR_Byte(0xC8,OLED_CMD);//正常顯示
OLED_WR_Byte(0xA1,OLED_CMD);
}
if(i==1)
{
OLED_WR_Byte(0xC0,OLED_CMD);//反轉顯示
OLED_WR_Byte(0xA0,OLED_CMD);
}
}
void OLED_WR_Byte(u8 dat,u8 cmd)
{
u8 i;
if(cmd)
OLED_DC_Set();
else
OLED_DC_Clr();
OLED_CS_Clr();
for(i=0;i<8;i++)
{
OLED_SCLK_Clr();
if(dat&0x80)
OLED_SDIN_Set();
else
OLED_SDIN_Clr();
OLED_SCLK_Set();
dat<<=1;
}
OLED_CS_Set();
OLED_DC_Set();
}
//開啟OLED顯示
void OLED_DisPlay_On(void)
{
OLED_WR_Byte(0x8D,OLED_CMD);//電荷泵使能
OLED_WR_Byte(0x14,OLED_CMD);//開啟電荷泵
OLED_WR_Byte(0xAF,OLED_CMD);//點亮螢屏
}
//關閉OLED顯示
void OLED_DisPlay_Off(void)
{
OLED_WR_Byte(0x8D,OLED_CMD);//電荷泵使能
OLED_WR_Byte(0x10,OLED_CMD);//關閉電荷泵
OLED_WR_Byte(0xAF,OLED_CMD);//關閉螢屏
}
//更新顯存到OLED
void OLED_Refresh(void)
{
u8 i,n;
for(i=0;i<8;i++)
{
OLED_WR_Byte(0xb0+i,OLED_CMD); //設定行起始地址
OLED_WR_Byte(0x00,OLED_CMD); //設定低列起始地址
OLED_WR_Byte(0x10,OLED_CMD); //設定高列起始地址
for(n=0;n<128;n++)
OLED_WR_Byte(OLED_GRAM[n][i],OLED_DATA);
}
}
//清屏函式
void OLED_Clear(void)
{
u8 i,n;
for(i=0;i<8;i++)
{
for(n=0;n<128;n++)
{
OLED_GRAM[n][i]=0;//清除所有資料
}
}
OLED_Refresh();//更新顯示
}
//畫點
//x:0~127
//y:0~63
void OLED_DrawPoint(u8 x,u8 y)
{
u8 i,m,n;
i=y/8;
m=y%8;
n=1<<m;
OLED_GRAM[x][i]|=n;
}
//清除一個點
//x:0~127
//y:0~63
void OLED_ClearPoint(u8 x,u8 y)
{
u8 i,m,n;
i=y/8;
m=y%8;
n=1<<m;
OLED_GRAM[x][i]=~OLED_GRAM[x][i];
OLED_GRAM[x][i]|=n;
OLED_GRAM[x][i]=~OLED_GRAM[x][i];
}
//畫線
//x:0~128
//y:0~64
void OLED_DrawLine(u8 x1,u8 y1,u8 x2,u8 y2)
{
u8 i,k,k1,k2,y0;
if((x1<0)||(x2>128)||(y1<0)||(y2>64)||(x1>x2)||(y1>y2))return;
if(x1==x2) //畫豎線
{
for(i=0;i<(y2-y1);i++)
{
OLED_DrawPoint(x1,y1+i);
}
}
else if(y1==y2) //畫橫線
{
for(i=0;i<(x2-x1);i++)
{
OLED_DrawPoint(x1+i,y1);
}
}
else //畫斜線
{
k1=y2-y1;
k2=x2-x1;
k=k1*10/k2;
for(i=0;i<(x2-x1);i++)
{
OLED_DrawPoint(x1+i,y1+i*k/10);
}
}
}
//x,y:圓心坐標
//r:圓的半徑
void OLED_DrawCircle(u8 x,u8 y,u8 r)
{
int a, b,num;
a = 0;
b = r;
while(2 * b * b >= r * r)
{
OLED_DrawPoint(x + a, y - b);
OLED_DrawPoint(x - a, y - b);
OLED_DrawPoint(x - a, y + b);
OLED_DrawPoint(x + a, y + b);
OLED_DrawPoint(x + b, y + a);
OLED_DrawPoint(x + b, y - a);
OLED_DrawPoint(x - b, y - a);
OLED_DrawPoint(x - b, y + a);
a++;
num = (a * a + b * b) - r*r;//計算畫的點離圓心的距離
if(num > 0)
{
b--;
a--;
}
}
}
//在指定位置顯示一個字符,包括部分字符
//x:0~127
//y:0~63
//size:選擇字體 12/16/24
//取模方式 逐列式
void OLED_ShowChar(u8 x,u8 y,u8 chr,u8 size1)
{
u8 i,m,temp,size2,chr1;
u8 y0=y;
size2=(size1/8+((size1%8)?1:0))*(size1/2); //得到字體一個字符對應點陣集所占的位元組數
chr1=chr-' '; //計算偏移后的值
for(i=0;i<size2;i++)
{
if(size1==12)
{temp=asc2_1206[chr1][i];} //呼叫1206字體
else if(size1==16)
{temp=asc2_1608[chr1][i];} //呼叫1608字體
else if(size1==24)
{temp=asc2_2412[chr1][i];} //呼叫2412字體
else return;
for(m=0;m<8;m++) //寫入資料
{
if(temp&0x80)OLED_DrawPoint(x,y);
else OLED_ClearPoint(x,y);
temp<<=1;
y++;
if((y-y0)==size1)
{
y=y0;
x++;
break;
}
}
}
}
//顯示字串
//x,y:起點坐標
//size1:字體大小
//*chr:字串起始地址
void OLED_ShowString(u8 x,u8 y,u8 *chr,u8 size1)
{
while((*chr>=' ')&&(*chr<='~'))//判斷是不是非法字符!
{
OLED_ShowChar(x,y,*chr,size1);
x+=size1/2;
if(x>128-size1) //換行
{
x=0;
y+=2;
}
chr++;
}
}
//m^n
u32 OLED_Pow(u8 m,u8 n)
{
u32 result=1;
while(n--)
{
result*=m;
}
return result;
}
顯示2個數字
x,y :起點坐標
len :數字的位數
size:字體大小
void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size1)
{
u8 t,temp;
for(t=0;t<len;t++)
{
temp=(num/OLED_Pow(10,len-t-1))%10;
if(temp==0)
{
OLED_ShowChar(x+(size1/2)*t,y,'0',size1);
}
else
{
OLED_ShowChar(x+(size1/2)*t,y,temp+'0',size1);
}
}
}
//顯示漢字
//x,y:起點坐標
//num:漢字對應的序號
//取模方式 列行式
void OLED_ShowChinese(u8 x,u8 y,u8 num,u8 size1)
{
u8 i,m,n=0,temp,chr1;
u8 x0=x,y0=y;
u8 size3=size1/8;
while(size3--)
{
chr1=num*size1/8+n;
n++;
for(i=0;i<size1;i++)
{
if(size1==16)
{temp=Hzk1[chr1][i];}//呼叫16*16字體
else if(size1==24)
{temp=Hzk2[chr1][i];}//呼叫24*24字體
else if(size1==32)
{temp=Hzk3[chr1][i];}//呼叫32*32字體
else if(size1==64)
{temp=Hzk4[chr1][i];}//呼叫64*64字體
else return;
for(m=0;m<8;m++)
{
if(temp&0x01)OLED_DrawPoint(x,y);
else OLED_ClearPoint(x,y);
temp>>=1;
y++;
}
x++;
if((x-x0)==size1)
{x=x0;y0=y0+8;}
y=y0;
}
}
}
//num 顯示漢字的個數
//space 每一遍顯示的間隔
void OLED_ScrollDisplay(u8 num,u8 space)
{
u8 i,n,t=0,m=0,r;
while(1)
{
if(m==0)
{
OLED_ShowChinese(128,24,t,16); //寫入一個漢字保存在OLED_GRAM[][]陣列中
t++;
}
if(t==num)
{
for(r=0;r<16*space;r++) //顯示間隔
{
for(i=0;i<144;i++)
{
for(n=0;n<8;n++)
{
OLED_GRAM[i-1][n]=OLED_GRAM[i][n];
}
}
OLED_Refresh();
}
t=0;
}
m++;
if(m==16){m=0;}
for(i=0;i<144;i++) //實作左移
{
for(n=0;n<8;n++)
{
OLED_GRAM[i-1][n]=OLED_GRAM[i][n];
}
}
OLED_Refresh();
}
}
//配置寫入資料的起始位置
void OLED_WR_BP(u8 x,u8 y)
{
OLED_WR_Byte(0xb0+y,OLED_CMD);//設定行起始地址
OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
OLED_WR_Byte((x&0x0f),OLED_CMD);
}
//x0,y0：起點坐標
//x1,y1：終點坐標
//BMP[]：要寫入的圖片陣列
void OLED_ShowPicture(u8 x0,u8 y0,u8 x1,u8 y1,u8 BMP[])
{
u32 j=0;
u8 x=0,y=0;
if(y%8==0)y=0;
else y+=1;
for(y=y0;y<y1;y++)
{
OLED_WR_BP(x0,y);
for(x=x0;x<x1;x++)
{
OLED_WR_Byte(BMP[j],OLED_DATA);
j++;
}
}
}
//OLED的初始化
void OLED_Init(void)
{
oled_ccc.OLED_SCLK = rt_pin_get("PA.3");
oled_ccc.OLED_SDIN = rt_pin_get("PA.4");
oled_ccc.OLED_RST = rt_pin_get("PF.1");
oled_ccc.OLED_DC = rt_pin_get("PB.0");
oled_ccc.OLED_CS = rt_pin_get("PA.5");
rt_pin_mode(oled_ccc.OLED_SCLK, PIN_MODE_OUTPUT);
rt_pin_mode(oled_ccc.OLED_SDIN, PIN_MODE_OUTPUT);
rt_pin_mode(oled_ccc.OLED_RST, PIN_MODE_OUTPUT);
rt_pin_mode(oled_ccc.OLED_DC, PIN_MODE_OUTPUT);
rt_pin_mode(oled_ccc.OLED_CS, PIN_MODE_OUTPUT);
rt_pin_write(oled_ccc.OLED_SCLK, PIN_HIGH);
rt_pin_write(oled_ccc.OLED_SDIN, PIN_HIGH);
rt_pin_write(oled_ccc.OLED_RST, PIN_HIGH);
rt_pin_write(oled_ccc.OLED_DC, PIN_HIGH);
rt_pin_write(oled_ccc.OLED_CS, PIN_HIGH);
OLED_RST_Clr();//復位
rt_thread_mdelay(200);
OLED_RST_Set();
OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
OLED_WR_Byte(0xCF,OLED_CMD);// Set SEG Output Current Brightness
OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WR_Byte(0x00,OLED_CMD);//-not offset
OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WR_Byte(0x02,OLED_CMD);//
OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
OLED_WR_Byte(0xAF,OLED_CMD);
OLED_Clear();
}
4 實作效果
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