Difference between revisions of "Matrix - Joystick"
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Copy your compiled bin to your board and you are ready to go. | Copy your compiled bin to your board and you are ready to go. | ||
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Revision as of 06:10, 6 August 2015
Contents
1 Introduction
This module consists of two Sliding rheostats and one button. When you move the joystick the sliding rheostats' resistance will change and the corresponding x/y values will change too. When you push the joystick the SW level will turn low.
2 Features
- two sliding rheostat and one button
- 2.54mm spacing pin
3 How To
3.1 Connection
- Connect to Tiny4412 SDK (1506)
- 1) Please connect the Tiny4412 SDK to Matrix - Analog to Digital Converter
- 2) Please connect the Joystick to Matrix - Analog to Digital Converter:
- GND to ground
- V to 5V
- VRX to Analog to Digital Converter's AIN0
- VRY to Analog to Digital Converter's AIN1
- SW to Analog to Digital Converter's AIN2
3.2 Code Sample in C Under Linux
#include <stdio.h> #include <unistd.h> #include <signal.h> #include <stdlib.h> #include "libfahw.h" #define SW_TRIGGER (5) #define PS2_READ_TIMES (10) static int devFD; void PS2Handler(int signNum) { if (signNum == SIGINT) { printf("Quit reading PS2 rocker\n"); pcf8591DeInit(devFD); } exit(0); } int main(int argc, char ** argv) { int mode = 0x0; if ((devFD = pcf8591Init()) == -1) { printf("Fail to init pcf8591 AD\n"); return -1; } if (pcf8591SetCtrl(devFD, PCF8591_INIT_AD_CONTROL) == -1) { printf("Fail to Set pcf8591 control AD\n"); pcf8591DeInit(devFD); return -1; } int i = 0; int x, y, z; signal(SIGINT, PS2Handler); for (i=0; i<PS2_READ_TIMES; i++) { x = pcf8591Read(devFD, mode, PCF8591_AIN_CHANNEL0); y = pcf8591Read(devFD, mode, PCF8591_AIN_CHANNEL1); z = pcf8591Read(devFD, mode, PCF8591_AIN_CHANNEL2); if (z > SW_TRIGGER) { z = 0; } else { z = 0; } else { z = 1; } printf("X=%3d Y=%3d Z=%d\n", x, y, z); sleep(1); } pcf8591DeInit(devFD); return 0; }
3.3 Compile and Run
git clone http://github.com/friendlyarm/fa-hardware.git cd fa-hardware cd demo cd matrix-joystick make
Copy your compiled bin to your board and you are ready to go.
