diff --git a/mux.c b/mux.c
new file mode 100644
index 0000000..8ffd16d
--- /dev/null
+++ b/mux.c
@@ -0,0 +1,19 @@
+#include "const.h"
+#include <stdint.h>
+#include <hardware/gpio.h>
+
+void set_mux_addr(uint8_t addr) {
+        gpio_put(MUX_S0, addr & 1);
+        gpio_put(MUX_S1, (addr >> 1) & 1);
+        gpio_put(MUX_S2, (addr >> 2) & 1);
+}
+
+float read_value_from_mux() {
+        return ;
+}
+
+void update_inputs() {
+        for(uint8_t i = 0; i < 2; i++) {
+
+        }
+}
\ No newline at end of file
diff --git a/sint-gauntlet.c b/sint-gauntlet.c
index 7910a91..282d8d2 100644
--- a/sint-gauntlet.c
+++ b/sint-gauntlet.c
@@ -40,9 +40,4 @@ void init_all() {
 __attribute__((noreturn)) int main() {
 	init_all();
 	
-
-	gpio_init(MUX_S0);
-	gpio_init(MUX_S1);
-	gpio_init(MUX_S1);
-
 }