ARM®mbed OS入门开发 诺基亚5110 SPI显示
【STM32 Mbed帖子大集合】
一个基础的 LCD显示测试, 原程序基于NXP LPC1768\'s
SPI 接口显示点阵,字符,数字基于 Nokia 5110 ,Nokia 3310 LCD
其控制器为 PCD8544
//平台nucleo 070r+mbed+Nokia5110 SPI屏幕
//
/*1. RST ——复位
2. CE—— 片选
3. DC—— 数据/指令选择
4. DIN —— 串行数据线
5. CLK —— 串行时钟线
6. VCC —— 电源输入（3.3v和5v均可，经过实验验证，没有问题）
7. BL——背光控制端
8. GND —— 地线
接口为串行SPI接口
*/
#include "mbed.h"
#include "N5110.h"
// VCC,SCE,RST,D/C,MOSI,SCLK,LED
N5110 lcd(D8,D9,D10,D11,D12,D13,D14);
//N5110 lcd VCC,SCE,RST,D/C,MOSI,SCLK,LED:p7,p8,p9,p10,p11,p13,p21
//原程序基于xbed LPC1768
// Can also power (VCC) directly from VOUT (3.3 V) -
// Can give better performance due to current limitation from GPIO pin
int main()
{
// first need to initialise display
lcd.init();
while(1) {
// these are default settings so not strictly needed
lcd.normalMode(); // normal colour mode
lcd.setBrightness(0.5); // put LED backlight on 50%
// can directly print strings at specified co-ordinates
lcd.printString("Hello, World!",0,0);
char buffer;// each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
// so can display a string of a maximum 14 characters in length
// or create formatted strings - ensure they aren't more than 14 characters long
int temperature = 27;
int length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
// it is important the format specifier ensures the length will fit in the buffer
if (length <= 14)// if string will fit on display
lcd.printString(buffer,0,1); // display on screen
float pressure = 1012.3;// same idea with floats
length = sprintf(buffer,"P = %.2f mb",pressure);
if (length <= 14)
lcd.printString(buffer,0,2);
// can also print individual characters at specified place
lcd.printChar('X',5,3);
// draw a line across the display at y = 40 pixels (origin top-left)
for (int i = 0; i < WIDTH; i++) {
lcd.setPixel(i,40);
}
// need to refresh display after setting pixels
lcd.refresh();
// can also check status of pixels using getPixel(x,y)
wait(5.0);
lcd.clear(); // clear display
lcd.inverseMode(); // invert colours
lcd.setBrightness(1.0); // put LED backlight on full
float array;
for (int i = 0; i < 84; i++) {
array = 0.5 + 0.5*sin(i*2*3.14/84);
}
// can also plot graphs - 84 elements only
// values must be in range 0.0 - 1.0
lcd.plotArray(array);
wait(5.0);
lcd.clear();
lcd.normalMode(); // normal colour mode back
lcd.setBrightness(0.5); // put LED backlight on 50%
// example of drawing lines
for (int x = 0; x < WIDTH ; x+=10) {
// x0,y0,x1,y1,type 0-white,1-black,2-dotted
lcd.drawLine(0,0,x,HEIGHT,2);
}
lcd.refresh(); // need to refresh screen after drawing lines
wait(5.0);
lcd.clear();
// example of how to draw circles
lcd.drawCircle(WIDTH/2,HEIGHT/2,20,1);// x,y,radius,black fill
lcd.drawCircle(WIDTH/2,HEIGHT/2,10,2);// x,y,radius,white fill
lcd.drawCircle(WIDTH/2,HEIGHT/2,30,0);// x,y,radius,transparent with outline
lcd.refresh(); // need to refresh screen after drawing circles
wait(5.0);
lcd.clear();
// example of how to draw rectangles
// origin x,y,width,height,type
lcd.drawRect(10,10,50,30,1);// filled black rectangle
lcd.drawRect(15,15,20,10,2);// filled white rectange (no outline)
lcd.drawRect(2,2,70,40,0); // transparent, just outline
lcd.refresh(); // need to refresh screen after drawing rects
wait(5.0);
lcd.clear();
}
}
另一种5110屏幕模块采用SPI接口，模块总共有8个引脚，接法如下：1. RST ====>复位
2. CE====>片选
3. DC====>数据/指令选择
4. DIN ====>串行数据线
5. CLK ====>串行时钟线
6. VCC ====>电源输入（3.3v和5v均可）
7. BL====>背光控制端
8. GND ====>地线
谢楼主分享 感谢楼主分享，非常详细啊。:D 谢谢分享 谢谢楼主分享:):):) 谢谢分享啊。
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