vault backup: 2026-03-04 22:40:14

Linux/Programm/GPIO Kernel control.md

@@ -1,29 +0,0 @@
-#include <libgpiod>
-
-void main() {
-    struct gpiod_chip *chip;
-    struct gpiod_line *line;
-    int req, value;
-
-    chip = gpiod_chip_open("/dev/gpiochip0");
-    if (!chip)
-        return -1;
-
-    line = gpiod_chip_get_line(chip, 3);
-    if (!line) {
-        gpiod_chip_close(chip);
-        return -1;
-    }
-
-    req = gpiod_line_request_input(line, "gpio_state");
-    if (req) {
-        gpiod_chip_close(chip);
-        return -1;
-    }
-
-    value = gpiod_line_get_value(line);
-
-    printf("GPIO value is: %d\n", value);
-
-    gpiod_chip_close(chip);
-}