Difference between revisions of "Matrix - I2C LCD1602"
From FriendlyELEC WiKi
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[[File:LCD160201.png|thumb|I2C LCD1602]] | [[File:LCD160201.png|thumb|I2C LCD1602]] | ||
[[File:LCD160202.png|thumb|I2C LCD1602]] | [[File:LCD160202.png|thumb|I2C LCD1602]] | ||
| − | This is an LCD module which has an I2C controller. It can display 16 x 2 characters. Its interface is parallel. To simplify its application we designed a controller which interfaces with other modules through I2C and transfers received signals to parallel signals to LCD1602. It can display, turn on and off back light. | + | This is an LCD module which has an I2C controller. It can display 16 x 2 characters. Its interface is parallel. To simplify its application we designed a controller on this module, which interfaces with other modules through I2C and transfers received signals to parallel signals to LCD1602. It can display, turn on and off back light. |
==特性== | ==特性== | ||
Revision as of 08:02, 5 August 2015
1 Introduction
This is an LCD module which has an I2C controller. It can display 16 x 2 characters. Its interface is parallel. To simplify its application we designed a controller on this module, which interfaces with other modules through I2C and transfers received signals to parallel signals to LCD1602. It can display, turn on and off back light.
2 特性
- I2C通讯，显示和背光可控
- 2.54mm排针接口，接线方便，通用性强
3 使用方法
3.1 连接
- 连接到Tiny4412 SDK (1506)
- GND: 接地
- VCC: 接5V
- SDA: I2C SDA
- SCL: I2C SCL
3.2 Linux下的C示例
#include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <stdlib.h> #include "libfahw.h" void test(char* line1, char* line2) { int devFD; if ((devFD = LCD1602Init()) == -1) { printf("Fail to init LCD1602\n"); return; } if (LCD1602Clear(devFD) == -1) { printf("Fail to Clear\n"); return; } if (LCD1602DispLines(devFD, line1, line2) == -1) { printf("Fail to Display String\n"); return ; } LCD1602DeInit(devFD); } int main(int argc, char ** argv) { int i; for (i=0; i<10; i++) { test("FriendlyARM", "From 2003"); sleep(3); } return 0; }
3.3 编译并运行示例
git clone http://github.com/friendlyarm/fa-hardware.git cd fa-hardware cd demo cd matrix-i2c_lcd1602 make
将编译生成的LCD1602通过ftp上传到开发板上运行即可测试。
