U8glib寫的oled電量顯示

ID:255921 · 發表于 2018-1-17 20:10

用的U8glib寫的，用了兩種方式，位圖和字符輸出

，代碼直接打包放下面，默認i2c接線A4 A5。我用的arduino nano ，OLED顯示屏顯示的位置根據自己需要改代碼中相應位置

源程序如下:

#include "U8glib.h"
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0); // I2C / TWI
//U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NONE); // I2C / TWI SDA A4 SCL A5
#define u8g_logo_width 38
#define u8g_logo_height 24
//static unsigned char u8g_logo_bits[] = {
int flash=0;
const uint8_t rook_bitmap5[] U8G_PROGMEM = {
0x00,0x00,0xFE,0xFF,0xFF,0xFE,0x00,0x00};//電池滿
const uint8_t rook_bitmap4[] U8G_PROGMEM = {
0x00,0x00,0xFE,0xFD,0xFD,0xFE,0x00,0x00};
const uint8_t rook_bitmap3[] U8G_PROGMEM = {
0x00,0x00,0xFE,0xF9,0xF9,0xFE,0x00,0x00};
const uint8_t rook_bitmap2[] U8G_PROGMEM = {
0x00,0x00,0xFE,0xE1,0xE1,0xFE,0x00,0x00};
const uint8_t rook_bitmap1[] U8G_PROGMEM = {
0x00,0x00,0xFE,0x81,0x81,0xFE,0x00,0x00};
const uint8_t rook_bitmap0[] U8G_PROGMEM = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; //電池空
//讀取vcc電壓
long readVcc() {
long result;
// Read 1.1V reference against AVcc
ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
delay(2); // Wait for Vref to settle
ADCSRA |= _BV(ADSC); // Convert
while (bit_is_set(ADCSRA,ADSC));
result = ADCL;
result |= ADCH<<8;
result = 1126400L / result; // Back-calculate AVcc in mV
return result;
}
void loop(void) {
float vcc_vol=readVcc()/1000; //將讀取的vcc電壓mv轉換為v
//旋轉90°
//u8g.setRot90(); //or setRot180(); setRot270();
u8g.setFont(u8g_font_gdr14r);//坐標函數字體osb18
// u8g.setPrintPos(0, 20); //定位電池電量圖標的起始位置
if (vcc_vol >=4.5 ){
u8g.drawXBMP( 0, 0, u8g_logo_width, u8g_logo_height, rook_bitmap5);// u8g.drawXBMP( 0, 0, u8g_logo_width, u8g_logo_height, rook_bitmap0);
}
if (vcc_vol <4.5 && vcc_vol>=4 ){
u8g.drawXBMP( 0, 0, u8g_logo_width, u8g_logo_height, rook_bitmap4);
}
if (vcc_vol <4 && vcc_vol>=3.5 ){
u8g.drawXBMP( 0, 0, u8g_logo_width, u8g_logo_height, rook_bitmap3);
}
if (vcc_vol <3.5 && vcc_vol>=3 ){
u8g.drawXBMP( 0, 0, u8g_logo_width, u8g_logo_height, rook_bitmap2);
}
if (vcc_vol <3 ){ //當VCC電壓小于3v時圖標閃爍，電池電量不足警告
switch (flash){
case 0:
u8g.drawXBMP( 0, 0, u8g_logo_width, u8g_logo_height, rook_bitmap1);
flash=1;
break;
case 1:
u8g.drawXBMP( 0, 0, u8g_logo_width, u8g_logo_height, rook_bitmap0);
flash=0;
break;
}
}
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