掌機 - Anbernic RG28XX - C/C++ - Input Event

main.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <linux/input.h>
 
/*
UP     buf[10]=0x11, buf[12]=0xff
DOWN   buf[10]=0x11, buf[12]=0x01
LEFT   buf[10]=0x10, buf[12]=0xff
RIGHT  buf[10]=0x10, buf[12]=0x01
A      buf[10]=0x30, buf[12]=0x01
B      buf[10]=0x31, buf[12]=0x01
X      buf[10]=0x33, buf[12]=0x01
Y      buf[10]=0x32, buf[12]=0x01
L1     buf[10]=0x34, buf[12]=0x01
L2     buf[10]=0x3a, buf[12]=0x01
R1     buf[10]=0x35, buf[12]=0x01
R2     buf[10]=0x3b, buf[12]=0x01
MENU   buf[10]=0x38, buf[12]=0x01
MENU   buf[10]=0x62, buf[12]=0x01
SELECT buf[10]=0x36, buf[12]=0x01
START  buf[10]=0x37, buf[12]=0x01
VOL+   buf[10]=0x73, buf[12]=0x01
VOL-   buf[10]=0x72, buf[12]=0x01
*/

int main(int argc, char **argv)
{
    int fd = -1;
    char buf[16] = {0};

    fd = open("/dev/input/event1", O_RDONLY);
    if (fd > 0) {
        while (1) {
            if (read(fd, buf, 16)) {
                int s = !!buf[12];

                switch (buf[10]) {
                case 0x11: 
                    if (s) {
                        printf("%s 1\n", buf[12] == 0xff ? "UP" : "DOWN");
                    }
                    else {
                        printf("UP/DOWN 0\n");
                    }
                    break;
                case 0x10:
                    if (s) {
                        printf("%s 1\n", buf[12] == 0xff ? "LEFT" : "RIGHT");
                    }
                    else {
                        printf("LEFT/RIGHT 0\n");
                    }
                    break;
                case 0x30: printf("A %d\n", s); break;
                case 0x31: printf("B %d\n", s); break;
                case 0x33: printf("X %d\n", s); break;
                case 0x32: printf("Y %d\n", s); break;
                case 0x34: printf("L1 %d\n", s); break;
                case 0x3a: printf("L2 %d\n", s); break;
                case 0x35: printf("R1 %d\n", s); break;
                case 0x3b: printf("R2 %d\n", s); break;
                case 0x38: printf("MENU %d\n", s); break;
                case 0x62: printf("MENU %d\n", s); break;
                case 0x36: printf("SELECT %d\n", s); break;
                case 0x37: printf("START %d\n", s); break;
                case 0x73: printf("VOL+ %d\n", s); break;
                case 0x72: printf("VOL- %d\n", s); break;
                }
            }
        }
    }
    return 0;
}