Difference between revisions of "Matrix - One Touch Sensor/zh"
From FriendlyELEC WiKi
Line 113: | Line 113: | ||
<syntaxhighlight lang="bash"> | <syntaxhighlight lang="bash"> | ||
Waiting event... | Waiting event... | ||
− | + | Device[0] value is 1 | |
</syntaxhighlight> | </syntaxhighlight> | ||
==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-gpio_int,内容如下: | |
<syntaxhighlight lang="c"> | <syntaxhighlight lang="c"> | ||
int main(int argc, char ** argv) | int main(int argc, char ** argv) | ||
Line 125: | Line 125: | ||
char value[ARRAY_SIZE(dev)]; | char value[ARRAY_SIZE(dev)]; | ||
− | if ((board = boardInit()) < 0) | + | if ((board = boardInit()) < 0) { |
printf("Fail to init board\n"); | printf("Fail to init board\n"); | ||
+ | return -1; | ||
+ | } | ||
− | if (argc == 2) | + | if (argc == 2) |
dev[0].pin = atoi(argv[1]); | dev[0].pin = atoi(argv[1]); | ||
− | |||
− | |||
system("modprobe "DRIVER_MODULE); | system("modprobe "DRIVER_MODULE); | ||
signal(SIGINT, intHandler); | signal(SIGINT, intHandler); | ||
if (board == BOARD_NANOPI_T2) | if (board == BOARD_NANOPI_T2) | ||
dev[0].pin = GPIO_PIN(15); | dev[0].pin = GPIO_PIN(15); | ||
+ | printf("Use GPIO_PIN(%d)\n", dev[0].pin); | ||
if ((devFD =sensorInit(dev, ARRAY_SIZE(dev))) == -1) { | if ((devFD =sensorInit(dev, ARRAY_SIZE(dev))) == -1) { | ||
printf("Fail to init sensor\n"); | printf("Fail to init sensor\n"); | ||
− | + | goto err; | |
} | } | ||
printf("Waiting event...\n"); | printf("Waiting event...\n"); | ||
Line 147: | Line 148: | ||
i = 0; | i = 0; | ||
for (i=0; i<retSize; i++) { | for (i=0; i<retSize; i++) { | ||
− | printf(" | + | printf("Device[%d] value is %d\n", i, value[i]); |
} | } | ||
} | } | ||
sensorDeinit(devFD); | sensorDeinit(devFD); | ||
+ | err: | ||
system("rmmod "DRIVER_MODULE); | system("rmmod "DRIVER_MODULE); | ||
return 0; | return 0; |
Revision as of 06:21, 3 June 2016
Contents
1 介绍
- 模块Matrix-One_Touch_Sensor是单点电容式数字触摸传感器模块,使用专用单键电容式触摸检测传感器TTP223,提供1个触摸键,人体触摸检测稳定,可替代传统的直接开关按键。模块默认输出低电平,当手指触摸触电时,模块输出高电平。
2 特性
- 使用标准的3 PIN接口
- 尺寸为 16x24mm
- PCB尺寸(mm):16x24
- 引脚说明:
名称 | 描述 |
S | GPIO |
V | 电源5V |
G | 地 |
3 工作原理
TTP223是一颗单键电容式触摸检测IC,它是利用电荷转移技术,通过检测压克力、塑料、玻璃、陶瓷、木材等绝缘介质上的按键电极与地的寄生电容电荷的微小改变来进行检测。
4 硬件连接
4.1 连接NanoPi M1
连接说明:
Matrix-One_Touch_Sensor | NanoPi M1 |
S | Pin7 |
V | Pin4 |
G | Pin6 |
4.2 连接NanoPi 2
参考下图连接模块:
Matrix-One_Touch_Sensor_nanopi_2
连接说明:
Matrix-One_Touch_Sensor | NanoPi 2 |
S | Pin7 |
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:
连接说明:
Matrix-One_Touch_Sensor | NanoPi M2 |
S | Pin7 |
V | Pin4 |
G | Pin6 |
4.4 连接NanoPC-T2
参考下图连接模块:
Matrix-One_Touch_Sensor_NanoPC-T2
连接说明:
Matrix-One_Touch_Sensor | NanoPC-T2 |
S | Pin15 |
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-gpio_int
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:
Waiting event... Device[0] value is 1
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-gpio_int,内容如下:
int main(int argc, char ** argv) { int i, board; int retSize = -1; char value[ARRAY_SIZE(dev)]; if ((board = boardInit()) < 0) { printf("Fail to init board\n"); return -1; } if (argc == 2) dev[0].pin = atoi(argv[1]); system("modprobe "DRIVER_MODULE); signal(SIGINT, intHandler); if (board == BOARD_NANOPI_T2) dev[0].pin = GPIO_PIN(15); printf("Use GPIO_PIN(%d)\n", dev[0].pin); if ((devFD =sensorInit(dev, ARRAY_SIZE(dev))) == -1) { printf("Fail to init sensor\n"); goto err; } printf("Waiting event...\n"); if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(dev))) == -1) { printf("Fail to read sensors\n"); } if (retSize > 0) { i = 0; for (i=0; i<retSize; i++) { printf("Device[%d] value is %d\n", i, value[i]); } } sensorDeinit(devFD); err: system("rmmod "DRIVER_MODULE); return 0; }
API说明参考维基:Matrix API reference manual