Difference between revisions of "Matrix - Relay/zh"
From FriendlyELEC WiKi
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::将配件S针脚连接到GPIO PIN1, V接5V，G接地 | ::将配件S针脚连接到GPIO PIN1, V接5V，G接地 | ||
| − | === | + | ===Code Sample in C Under Linux=== |
<syntaxhighlight lang="c"> | <syntaxhighlight lang="c"> | ||
#include <stdio.h> | #include <stdio.h> | ||
Revision as of 08:54, 7 August 2015
Contents
1 Introduction
这是一个单刀双掷继电器，线圈电压为直流5V，触点电流可达10A，适合驱动直流或交流大功率负载。NO为常开触点，NC为常闭触点，COM为公共触点。当向S引脚施加高电平，继电器线圈导通，此时NO触点断开，NC触点闭合。
2 特性
- 1 Form C
- 5V线圈电压，控制信号为3.3/5V
- 触点电流可达10A
- LED指示
- 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)
- 将配件S针脚连接到GPIO PIN1, V接5V，G接地
3.2 Code Sample in C Under Linux
#include <stdio.h> #include <string.h> #include "libfahw.h" int main(int argc, char ** argv) { char *status = "off"; if (argc != 2) { printf("Set relay on\n"); } else { status = argv[1]; printf("Set relay %s\n", argv[1]); } int pin = TINY4412_GPIO_PIN1; int ret = -1; if ((ret = exportGPIOPin(pin)) != 0) { printf("exportGPIOPin(%d) failed!", pin); } if ((ret = setGPIODirection(pin, GPIO_OUT)) != 0) { printf("setGPIODirection(%d) failed", pin); } if (strcmp(status, "on") == 0) { ret = setGPIOValue(pin, GPIO_LOW); } else { ret = setGPIOValue(pin, GPIO_HIGH); } return ret; }
3.3 Compile and Run
git clone http://github.com/friendlyarm/fa-hardware.git cd fa-hardware cd demo cd matrix-relay make
Copy your compiled bin to your board and you are ready to go.
