Difference between revisions of "Matrix - Rotary Encoder/zh"
From FriendlyELEC WiKi
| Line 128: | Line 128: | ||
==代码说明== | ==代码说明== | ||
| − | + | 所有的开发板都共用一套Matrix代码，本模块的测试示例代码为matrix-rotary_encoder，内容如下: | |
<syntaxhighlight lang="c"> | <syntaxhighlight lang="c"> | ||
int main(int argc, char ** argv) | int main(int argc, char ** argv) | ||
| Line 140: | Line 140: | ||
int sibPin = GPIO_PIN(10); | int sibPin = GPIO_PIN(10); | ||
| − | if ((board = boardInit()) < 0) | + | if ((board = boardInit()) < 0) { |
printf("Fail to init board\n"); | printf("Fail to init board\n"); | ||
| + | return -1; | ||
| + | } | ||
if (board == BOARD_NANOPI_T2) { | if (board == BOARD_NANOPI_T2) { | ||
swPin = GPIO_PIN(15); | swPin = GPIO_PIN(15); | ||
| Line 147: | Line 149: | ||
sibPin = GPIO_PIN(17); | sibPin = GPIO_PIN(17); | ||
} | } | ||
| − | system("modprobe " | + | system("modprobe "DRIVER_MODULE); |
if (rotaryEncoderInit(swPin, siaPin, sibPin)) { | if (rotaryEncoderInit(swPin, siaPin, sibPin)) { | ||
printf("Fail to init rotary encoder\n"); | printf("Fail to init rotary encoder\n"); | ||
| − | + | goto err; | |
} | } | ||
| − | |||
signal(SIGINT, encoderHandler); | signal(SIGINT, encoderHandler); | ||
for (i=0; i<ENCODER_READ_TIMES; i++) { | for (i=0; i<ENCODER_READ_TIMES; i++) { | ||
| Line 161: | Line 162: | ||
} | } | ||
rotaryEncoderDeInit(); | rotaryEncoderDeInit(); | ||
| − | system("rmmod " | + | err: |
| + | system("rmmod "DRIVER_MODULE); | ||
return 0; | return 0; | ||
} | } | ||
Revision as of 06:28, 3 June 2016
Contents
1 介绍
2 特性
File:Matrix-Rotary Encoder PCB.png
- 引脚说明:
| 名称 | 描述 |
3 工作原理
4 硬件连接
4.1 连接NanoPi M1
参考下图连接模块：
Matrix-Rotary_Encoder_nanopi_m1
连接说明：
| Matrix-Rotary_Encoder | NanoPi M1 |
| R | Pin7 |
| G | Pin8 |
| B | Pin10 |
| V | Pin4 |
| G | Pin6 |
4.2 连接NanoPi 2
参考下图连接模块：
连接说明：
| Matrix-Rotary_Encoder | NanoPi 2 |
| R | Pin7 |
| G | Pin8 |
| B | Pin10 |
| V | Pin4 |
| G | Pin6 |
4.3 连接NanoPi M2 / NanoPi 2 Fire
NanoPi M2和NanoPi 2 Fire的40 Pin引脚定义是一模一样的，所以它们操作Matrix配件的步骤是一样的，这里仅以NanoPi M2为例。
参考下图连接模块：
Matrix-Rotary_Encoder_nanopi_m2
连接说明：
| Matrix-Rotary_Encoder | NanoPi M2 |
| R | Pin7 |
| G | Pin8 |
| B | Pin10 |
| V | Pin4 |
| G | Pin6 |
4.4 连接NanoPC-T2
参考下图连接模块：
Matrix-Rotary_Encoder_NanoPC-T2
连接说明：
| Matrix-Rotary_Encoder | NanoPC-T2 |
| R | Pin15 |
| G | Pin16 |
| B | Pin17 |
| V | Pin29 |
| G | Pin30 |
5 编译运行测试程序
启动开发板并运行Debian系统，进入系统后克隆Matrix代码仓库：
$ apt-get update && apt-get install git $ git clone https://github.com/friendlyarm/matrix.git
克隆完成后会得到一个名为matrix的目录。
编译并安装Matrix：
$ cd matrix $ make && make install
运行测试程序：
$ matrix-rotary_encoder注意：此模块并不支持热插拔，启动系统前需要确保硬件连接正确。
运行效果如下：
Get sw=0 value=1 Get sw=0 value=2 Get sw=0 value=3 Get sw=0 value=4 Get sw=0 value=5
6 代码说明
所有的开发板都共用一套Matrix代码，本模块的测试示例代码为matrix-rotary_encoder，内容如下:
int main(int argc, char ** argv) { int i = 0; int encoderSw = 0; int encoderValue = 0; int board; int swPin = GPIO_PIN(7); int siaPin = GPIO_PIN(8); int sibPin = GPIO_PIN(10); if ((board = boardInit()) < 0) { printf("Fail to init board\n"); return -1; } if (board == BOARD_NANOPI_T2) { swPin = GPIO_PIN(15); siaPin = GPIO_PIN(16); sibPin = GPIO_PIN(17); } system("modprobe "DRIVER_MODULE); if (rotaryEncoderInit(swPin, siaPin, sibPin)) { printf("Fail to init rotary encoder\n"); goto err; } signal(SIGINT, encoderHandler); for (i=0; i<ENCODER_READ_TIMES; i++) { rotaryEncoderRead(ENCODER_SW, &encoderSw); rotaryEncoderRead(ENCODER_VALUE, &encoderValue); printf("Get sw=%d value=%d\n", encoderSw, encoderValue); sleep(1); } rotaryEncoderDeInit(); err: system("rmmod "DRIVER_MODULE); return 0; }
API说明参考维基：Matrix API reference manual
