Add ADS1115 test

tests/ads1x1x.c

@@ -0,0 +1,34 @@
+#include "mgos.h"
+#include "mgos_ads1x1x.h"
+#include "tests_autogen.h"
+
+uint32_t test_ads1x1x_period_ms = 100;
+bool     test_ads1x1x_enabled   = true;
+
+static struct mgos_ads1x1x *s_adc = NULL;
+
+bool test_ads1x1x_create(void) {
+  // LOG(LL_INFO, ("Setting up"));
+  s_adc = mgos_ads1x1x_create(mgos_i2c_get_global(), 0x48, ADC_ADS1115);
+  if (!s_adc) return false;
+
+  mgos_ads1x1x_set_fsr(s_adc, MGOS_ADS1X1X_FSR_4096);
+  return true;
+}
+
+bool test_ads1x1x_run(void) {
+  int16_t result[4];
+  for(int i=0; i<4; i++) {
+    if (!mgos_ads1x1x_read(s_adc, i, &result[i])) {
+      LOG(LL_ERROR, ("Could not read device"));
+      return false;
+    }
+  }
+  LOG(LL_INFO, ("chan={%6d, %6d, %6d, %6d}", result[0], result[1], result[2], result[3]));
+  return true;
+}
+
+bool test_ads1x1x_destroy(void) {
+  mgos_ads1x1x_destroy(&s_adc);
+  return true;
+}