Import of the watch repository from Pebble

tests/fw/drivers/test_fpc_pinstrap.c

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "clar.h"
+
+#include "board/board.h"
+#include "drivers/fpc_pinstrap.h"
+
+static bool s_pin_pull_up_enabled[2] = { false, false };
+
+void gpio_input_init_pull_up_down(const InputConfig *input_cfg, GPIOPuPd_TypeDef pupd) {
+  s_pin_pull_up_enabled[input_cfg->gpio_pin] = (pupd == GPIO_PuPd_UP);
+}
+
+void gpio_analog_init(const InputConfig *input_cfg) {
+}
+
+static enum {
+  PinstrapResult_GND,
+  PinstrapResult_Vplus,
+  PinstrapResult_Float
+} s_pinstrap_results[2];
+
+bool gpio_input_read(const InputConfig *input_cfg) {
+  switch (s_pinstrap_results[input_cfg->gpio_pin]) {
+    case PinstrapResult_GND:
+      return false;
+    case PinstrapResult_Vplus:
+      return true;
+    case PinstrapResult_Float:
+      return s_pin_pull_up_enabled[input_cfg->gpio_pin];
+  }
+}
+
+void test_fpc_pinstrap__simple(void) {
+  s_pinstrap_results[0] = PinstrapResult_GND;
+
+  s_pinstrap_results[1] = PinstrapResult_GND;
+  cl_assert(fpc_pinstrap_get_value() == 0x0);
+
+  s_pinstrap_results[1] = PinstrapResult_Vplus;
+  cl_assert(fpc_pinstrap_get_value() == 0x1);
+
+  s_pinstrap_results[1] = PinstrapResult_Float;
+  cl_assert(fpc_pinstrap_get_value() == 0x2);
+
+
+  s_pinstrap_results[0] = PinstrapResult_Vplus;
+
+  s_pinstrap_results[1] = PinstrapResult_GND;
+  cl_assert(fpc_pinstrap_get_value() == 0x3);
+
+  s_pinstrap_results[1] = PinstrapResult_Vplus;
+  cl_assert(fpc_pinstrap_get_value() == 0x4);
+
+  s_pinstrap_results[1] = PinstrapResult_Float;
+  cl_assert(fpc_pinstrap_get_value() == 0x5);
+
+
+  s_pinstrap_results[0] = PinstrapResult_Float;
+
+  s_pinstrap_results[1] = PinstrapResult_GND;
+  cl_assert(fpc_pinstrap_get_value() == 0x6);
+
+  s_pinstrap_results[1] = PinstrapResult_Vplus;
+  cl_assert(fpc_pinstrap_get_value() == 0x7);
+
+  s_pinstrap_results[1] = PinstrapResult_Float;
+  cl_assert(fpc_pinstrap_get_value() == 0x8);
+}