sound volume configurable

sound-driver/config.c

@@ -0,0 +1,19 @@
+#include <stdint.h>
+#include "config.h"
+
+
+typedef struct {
+  uint8_t amplitude;
+} config_t;
+
+config_t config;
+
+
+void configSetAmplitude(uint8_t v) {
+  config.amplitude = v;
+}
+
+uint8_t configGetAmplitude() {
+  return config.amplitude;
+}
+