Matrix - Button/zh
From FriendlyELEC WiKi
1 介绍
该按键在未按时输出高电平,按下后输出低电平。
2 特性
- 3 PIN
- 尺寸(TODO)
3 使用方法
3.1 连接
- 连接到Tiny4412 SDK
- 将S针脚连接到GPIO PIN1即可
3.2 Linux下的C示例
#include <stdio.h> #include "libfahw.h" static struct sensor button[] = { { TINY4412_GPIO_PIN1, IRQ_TYPE_EDGE_FALLING, } }; int main(void) { int i; int retSize = -1; char value[ARRAY_SIZE(button)]; int devFD = -1; if ((devFD =sensorInit(button, ARRAY_SIZE(button))) == -1) { printf("Fail to init sensor\n"); return -1; } printf("Press the button...\n"); if (( retSize = sensorRead(devFD, value, ARRAY_SIZE(button)) ) == -1) { printf("Fail to read sensors\n"); } if (retSize > 0) { i = 0; for (i=0; i<retSize; i++) { printf("Button[%d]:%d\n", i, value[i]); } } sensorDeinit(devFD); return 0; }